RE: Bandit ARF CG w/P-80 & large hopper?
Wow, thanks a lot for all the responses! And I forgot to mention, yes we did have takeoff flaps! We'll try readjusting the CG with the hopper full and moving rearwards from there, taking off from the beginning of our runway (which is 1000ft long!) Thanks Hermann
Posted on: 11/17/2009 11:18 AM by Author "hpais" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=9260099

RE: Flight controls power requirements and servo sizing
Oliver, Thanks a lot for explaining the method. This is a great thread, it should be made sticky. By the way, I love your arcticles in RCJI. Best regards Hermann
Posted on: 11/17/2009 7:51 AM by Author "hpais" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=9259761

Bandit ARF CG w/P-80 & large hopper?
Good day folks, Last saturday we had the maiden of my Bandit ARF, which I picked up at BVM in early october. It was built with a professional builder's assistance and by the book. All servos were the BVM recommeded servos, turbine was a P-80SE and the only options added were the MGA Pilot and the large hopper tank. RX is a JR1221, battery is a 2400mAh 6V also from JR mounted on the nose. The ECU LiPo was mounted under the servo tray also per BVM's recommendation We built and placed the CG exactly where BVM recommeds it, however on the maiden flight, the BARF refused to get off the ground, ran out of runway (we had 600ft!), ripped off the nose gear flex plates, and both wing flex plates. One wing was damaged by the landing gear's cylinder which poked it up. Not pretty or a maiden which was supposed to be flawless, of a product that is top of the line in quality, and has top of the line documentation. So where did we go wrong? We are running out of options, and the one left is that the CG was too nose heavy because of the large hopper with the P-80. However the documentation doesn't mention any alteration of the CG in this case. We measured the CG with only the UAT full (it sits behind the turbine). Should we have measured it with the large hopper tank full also? Should the Rx battery sit under the air intake? Should we have lead on the rear of the plane? Thanks for any insights and suggestions. Hermann
Posted on: 11/17/2009 7:42 AM by Author "hpais" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=9259752

RE: Another Skymaster Viper
A few more pics, hopefully these don't screw up the screen size...
Posted on: 11/16/2009 7:04 PM by Author "hpais" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=9258630

RE: Airpower EV-5U-A problems
Todd, this is a PRO unit that I got bundled with the VIPER. The other 2 I purchased from you are still stuck in customs (since 11/9), which is normal for Brazil. This one was shipped to me by Airpower directly. The pressure sensor works very well, and in the case of the CARF Tucano we decided on this valve because it is the only one that has a longer than 3 sec delay between gear up and door closing. The Tucano has very heavy gears, everything works great on the ground, but fails once in the air... without the Airpower valve we can only get the doors to close by slowing down the plane and placing it inverted. Go figure... With the Airpower valve and a 6 second delay, everything works, but it looks like the valve we got need to be reprogrammed every flight. Thanks Hermann
Posted on: 11/16/2009 6:56 PM by Author "hpais" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=9258604

RE: Another Skymaster Viper
Here are the mods that Celso De Santi, the person building my Viper is doing to the cockpits. The idea is to have the two tubs attached to the canopy, like you have on a Bandit ARF. So when you remove the canopy, the tubs come out together. You can see that he has replaced the instrument panel cover with a thin sheet of 1/16 ply, and reinforced the front tub with balsa.
Posted on: 11/16/2009 2:17 PM by Author "hpais" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=9257978

RE: Airpower EV-5U-A problems
We installed one in a CARF Tucano and it's loosing its programming after a power reset. We are programming it for Mode 2. If I cycle power immediately, it retains the programming. However if I cycle the power after half an hour it goes back to Mode 1. Am I doing something wrong or is the valve bad? Thanks, Hermann
Posted on: 11/16/2009 1:55 PM by Author "hpais" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=9257934

RE: Another Skymaster Viper
MIA: the EVSD-5U-PRO-ST - Solved!!! They weren't inside the coffin with the ViperJet[8|] They were coming on a separate envelope, being shipped directly by AirPower in Taiwan to me. Arrived this afternoon[:D][:D][:D] On to the build. I will post pictures. One thing I was looking in the hardware bag, they sent several L aluminum servo mounts, I suspect some will be used on the stabs and rudders. The rudder by the way, already comes with two heavy duty carbon rods. I haven't looked at the rudder hinge attachment area to see if it was reinforced, though. The aluminum wing tube is no longer a simple tube, it's an extruded cilindrical aluminum profile, with internal reinforcements, lightweight yet heavy duty. And also, there's this additional tank that looks like an air tank, but it's for pressurizing the struts and tires, or so I've been told. Also a syringe and silicon oil for lubricating the o-rings was included. Very nice touch! The DVD has a manual that appears to be newer than the version I had downloaded from the site. I had this hapen to my BVM Bandit ARF as well - the manual shipped is way more complete than the on-line version. Two videos on the DVD - one from JetPower 09, with Ali flying it absurdly slow, and another older video from what looks like the first prototypes.
Posted on: 10/24/2009 6:38 PM by Author "hpais" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=9199080

RE: Why P120 size is so little popular
[quote]ORIGINAL: CDB-RAE if someone have a better choice or suggestion or info on my selection that will be appreciated[:D][:D] thanks for help [/quote] Did you look at the Christen Diffusion Fouga Magister 1/5? http://christen.diffusion.online.fr/fouga02.htm The Fouga, like most mid 50-60's jets has low wing loading and reasonably slow to land. They also have a Rafale 1/7... although the Rafale is normally very heavily loaded and needs speed to land. From Composite ARF, you have the Eurosport, which you can finish in an Eurofighter color scheme. Being a delta wing it lands slow and is very stall resistant. And from Skymaster, they now have a small ViperJet - http://www.skymasterjet.com/xviperjet.htm - the Viper lands very slowly, has a huge presence in the air and is just a beautiful plane (mine arrived today!!!)
Posted on: 10/23/2009 9:06 PM by Author "hpais" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=9197182

RE: Composite ARF Tucano Build
[quote]ORIGINAL: fred cesquim Tucano had it´s maiden yesterday, and apart from the landing gear jamming with the doors (mains) all was sucessful! now we will sort out what is going wrong with the gear. at the third flight it worked but still needs to be perfect. legs and wheels are too heavy and they took long time to retract. so doors even with sequencer maximum delay still closes and hit the wheels. maybe we will put a high flow air valve ( although we are using BVM)..let´s see what happens. any input on this? a [/quote] Fred, Yesterday's flight was awesome, absolutely amazing. The sound of that turboprop is simply too realistic. I was expecting the pilot to open the canopy and jump out on the tarmac after the flight. We have to build 3 more here in Brazil so we can have our own demonstration team to compete with "Esquadrilha da Fumaça". And by the way, Masterpieces is a very appropriate name for the work you do, simply master pieces, works of art. Gonzalo, if you think the interior finish is nice, you've seen nothing. It's amazing. There's nothing out of place in there, not a wire, not an air line, not a fuel line. I've watched over Fred's shoulder from when he started work on this particular Tucano. It's like watching a surgeon painstainkingly working, detailed to the extreme. I'm am unashamedly an admirer of Fred Cesquim and Celso De Santi's work. I'm sure that if they want, they can compete and win at the IJMC or any other scale competition for that matter. BTW, for those of you interested, still to come from their factory of wonders: another CARF A4, a CARF Corsair with Moki 5 zylinder radial, 2 ViperJets (one is mine[:D][:D]), a BVM F100 kit, a Proctor Albatross, a CARF Hawk, 3 Bandit ARF (one is mine [:D]), a SM Migm a CARF Flash... that's on the jet section. There are 2 BVM Mavericks on the EDF section, and another 10 or so gas giant kits.
Posted on: 10/23/2009 8:55 PM by Author "hpais" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=9197158

RE: Another Skymaster Viper
[quote]ORIGINAL: dubd Do you guys think the VJ would be easy to land on a 540 ft runway? I ask because I've seen videos of guys having a difficult time reducing airspeed enough to land in a reasonable distance. [/quote] Look at Ali Machinchy's flight on JetPower 2009 of the ViperJet... I know, he's a master and makes it look easy, but he does a veeeeery loooow speed pass with full flaps on and just a second there, he almost lands it without the gears. So the machine seems to slow down to a crawl, almost like (dare I say) a Boomerang!!! Selleri, Jclittle, thanks a lot for the pointers to the pilots. BEHOLD! The ViperJet has arrived!!![sm=biggrin.gif][sm=biggrin.gif][sm=thumbs_up.gif][sm=thumbup.gif][sm=teeth_smile.gif] I'm talking about mine of course. VP05 scheme, the Ali Machinchy original blue and green scheme. It didn't come with the two girls straddling it though. I thought they were blow ups and came inside the huge coffin![sm=tongue_smile.gif] Anyhow, for those of you unaware of how things occur outside the Good Old USA, the previous plane I imported into Brazil, a Boomerang Sprint, spent 3 months at Customs. The ViperJet spent only one week! Great job on the part of Michel Durand from JetsRC and of course Skymaster, for using DHL. That's the only way to go. The ViperJet comes inside a full size coffin, the same size as used for the deceased ones (with all respect!), and it weighs 29kg! That's 63lb! Big box, very well packaged, lots of styrofoam (pity I don't fly electrics, there's material to make a dozen of them in there). And I'm sure the packing guy spent three or four rolls of packing tape, at least a roll of bubble wrap, and a couple of trees worth of construction grade light ply. MIA: the EVSD-5U-PRO-ST, which we searched everywhere in the package and if it's there, it's hiding very well. Does anyone have a clue where the Skymaster packing guys hide them? Its either very well hidden or someone forgot to put it inside the Coffin before sealing it and shipping to me in Brazil. So, I still have about 5 days to go on the construction of the Bandit ARF, and then I'll have what I estimate is around 15 work days on the ViperJet... can't wait.!!! I'm very, very excited as you certainly can tell. This Viper will get the PowerBox Royal Spectrum treatment, plus 8611A's everywhere except on the elevators, they'll get 8711's. She will be powered by a brand spanking new P160SX that Alberto Enriquez from Modellbau USA/RAM is shipping to me. The Royal will have two 2500mAh LiPo's, and I'm still due on putting the order to Digitech of the horns and retract reinforcement plates. As soon as Dreamworks' Todd gets it done, I'll also get the FlugModellbau lighting kit - tail strobe and white, fuselage top and bottom strobes, wingtips nav - strobe and position lights, and landing lights. I reckon she'll carry 4 big LiPo's (1 ECU, 2 Royal, 1 Lights). �'m also looking at the size of the tanks, and after seeing a friend just maidening his Tucano CARF, and the fuel consumption, I'm thinking of adding another 2 liter big square tank on top of the other. I'm spoiled by the 4.7 liters on the Boomerang feeding the P70... 16 minute flights. Again, I'm sure Todd can rescue me, maybe I'll get a Kevlar Boomerang tank inside the Viper![sm=lol.gif] Good/bad/dumb idea? And as regards to Pilots, I may go the full monty and get the "EGO TRIP" pilots from the German guys (www.maffscav.de) - I'm just waiting for them to give me a quotation. Of course I won't make myself, I don't look that good. I'll put my wife and kids in it[sm=idea.gif] Life is short! Fly it!
Posted on: 10/23/2009 8:34 PM by Author "hpais" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=9197108

RE: Another Skymaster Viper
How about the "Elite Force" 1:6 scale from Blue Box toys - http://www.bbicollectible.com/product_list.asp?product_line=1:6 Scale&sub_line=Elite Force Freedom Force [image]http://www.bbicollectible.com/img/product/big/ef/16/021060-1.jpg[/image] California Army National Guard - Rosanna Jones [image]http://www.bbicollectible.com/img/product/big/ef/16/000133-1.jpg[/image] NSCT [image]http://www.bbicollectible.com/img/product/big/ef/16/021268-1.jpg[/image] Somewhere in there there's a pilot figure that suits everyone.
Posted on: 10/22/2009 8:30 PM by Author "hpais" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=9194548

RE: Bandit ARF...Any bad points.
[quote] [quote] ORIGINAL: ravill The bad: They aren't REALY ARF's. There's quite a bit of work actually. I have built all 3 of mine, I know... [/quote] This, from the guy who thinks slapping the two halves of a BVM kevlar tank together is hard work ! If you think they're that much work, pay me some exhorbitant fee to assemble your next one [/quote] Gordon, I'm on the 6th day of building my BARF, and tomorrow I'm resting...! I'm talking 6 full time, 8 hour days, and being supervised by a guy who has built over 10 of these! [sm=49_49.gif] (Celso De Santi for those who know him from Florida Jets and other meetings). Let me see: - on the first day - I assembled the LG's, glued the horns on wings, stabs, rudder, drilled the rubber tires, screwed the 8 midget screws in... - on the second day - mounted all the loose formers, hysoled the intakes, fuel tanks, saddle tanks, did a lot of tapping of screws, cyano-ing several of these screw seats, hysoling the rods on the stabs and rudder (only got one template, so it's one at a time) - on the third day - PITA of drilling the 45 degree aileron servo screws, adjusting aileron doors, drilling the flap rod channels, cyano the flap servos, then regluing said servo bases with hysol... hysoling the bases for the nylon screws that hold the back plate and canopy cover.- that's two days for the wings, elevs and rudders by the way.[sm=bananahead.gif] - on the fourth day - adjusting all myriad doors - cutting nose door, adjusting nose door hinges - front and rear, gluing base of rear nose door cylinder. Then on to the big bottom door, cutting, adjusting, sanding. Started preparing the P80 SE mount - painting with the BVM thermal insulating paint - on the fifth day - putting masking tape and paper all over the original painting so we could PU paint the inside a nice shade of gray, varnishing all servo tables, sanding #500, then applying the gray PU paint on the servo tables... lest me not forget, masking the canopy, turbine top plate and PU painting them...[sm=shades_smile.gif] - on the sixth day (today) - finished the wing (3 days total), started laying out the airlines, installed nose gear retracts, started laying out the servo table.[sm=tongue_smile.gif] Still to go: - finish the air works - plumbing the valves, installing and adjusting brake and retract servos, routing the airlines on tight - finish the P80 SE ducting - pin hole filling, priming, sanding, spray priming, sanding, PU painting - then adjusting the exhaust duct - that should be a day right here... - install the 3 tanks (2 mains, kevlar saddle), UAT, route the fuel lines, install the pump, kero and gas filters, solenoids, turbine wiring - install all the servo extensions (9 and counting), protect them with aluminum tape, put the thermal blanket around exhaust top So I guess I'm about half way done. The estimate is 10 x 8 hour days - 80 hours... and I hear that I am not off the mark for assembling the BARF, I'm actually going pretty quick. I'd say the BARF is a Semi-ARF. And the Super Bandit Kit... all the formers have to be adjusted, sanded, hysoled. The wing has to be built - it's a close to 150~200 hour job. They look more like an Experimental Airplane. I know there are some experimentals out there that are ready to fly within 400 hours.[:D] Of course, I'm loving it! [sm=teeth_smile.gif] Assembling it is a great learning experience. And before you ask, no, I'm not good enough to fly it on my own yet. O RealFlight G4.5 I can fly it reasonably well, but I'll ask for several flights of double with De Santi. So, yes the only bad point I see so far is that if you don't like building and have no attention to detail, pay someone the high bucks to put it together for you. Here in Brazil it costs $1,200 to have it professionally assembled. If you compare to the BARF GO FLY price of $4,595, plus $1,200 in servos and RX, another $3,500 for a P70/P80 for a grand total of $9,295 a professional builder adds 13% to the cost. Worth it in my opinion, I believe I will go this route next time. And yes, I wouldn't dare compare BVM's quality to anything else on the market. I don't think the BARF is expensive, to the contrary, it's worth every penny.
Posted on: 10/21/2009 8:23 PM by Author "hpais" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=9191921

RE: Another Skymaster Viper
Never mind... found the seats Thanks Hermann
Posted on: 10/15/2009 9:36 PM by Author "hpais" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=9176691

RE: lights for the skygate viper
What comes in their set? It only describes "multi light system". What exactly comes in it? Thanks!
Posted on: 10/5/2009 6:35 PM by Author "hpais" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=9149264

RE: lights for the skygate viper
Another alternative is www.flugmodellbau.de The catalog is attached, it's very small (450K) and informative. A friend has their lighting on a CARF Tucano, and it is amazing! The combined strobe/position wingtip lights are a work of art. Programming the lighting control wasn't too simple, but once we figured out how to do it - it took writing the manual in flowchart form - we could get it to do whatever we wanted. I hear they're coming up with a set specific for the Viper, including the vacuform light lenses. I'm waiting for my Skymaster Viper to be shipped (Michel from JetsRC says it's any day now) and I intend on putting these on it.
Posted on: 10/4/2009 11:37 AM by Author "hpais" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=9145563

RE: I have problems with my Air Power EVSD-5U-PRO-ST
Funny that I just opened this thread and the following ad came up: http://www.lado-tech.net/ Electric retracts that are compatible with Robart 600 and 630 series... now when will they come up with one that can handle a 10kg (22lb) jet? You could get rid of the whole airlines, plugins, tubes, air compressors, filters, driers, valves... is it a dream? I also fly full size airplanes (non-jet, single engine), and a Mooney I used to have has electric retracts. It's actually an electric motor (like a starter) coupled to a gearbox and a spindle. The spindle winds up or down three sets of cables hence actuating the retracts up or down. Very simple, low maintenance and extremely reliable. It has a pull cord for backup in case the motor gets fried. That would be an idea...
Posted on: 9/3/2009 10:13 PM by Author "hpais" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=9068323

RE: FUTABA S3305 IN EUROSPORT? POSSIBLE?
Willen, This thread is about this topic: http://www.rcuniverse.com/forum/m_9039476/anchors_9039579/mpage_1/key_/anchor/tm.htm#9039579
Posted on: 9/3/2009 9:59 PM by Author "hpais" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=9068278

RE: EvoJet BOOSTER 90
The pricing is interesting... G-booster 90 - US$2,318 G-booster 130 - US$2,978 G-booster 160 - US$ 3,445 Has anyone used them? They look amazingly similar to the Graupner...
Posted on: 8/11/2009 9:25 PM by Author "hpais" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=9008937

RE: New engine arrived, Graupner G-Booster 80+
Now they call it G-Booster 90, so is this just a name change or is it the same turbine?
Posted on: 8/11/2009 9:08 PM by Author "hpais" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=9008889

RE: Skymaster NEW F86 SABRE
[quote]ORIGINAL: MNModels Hi, Yes no problem. I think most pilots will fit the P-80 size turbines in the airframe! John! [/quote] Reading this thread, and exchanging like 20 emails with Michel Durand, I got convinced and just put an order for a Skyblazer F86! Now,'I'm looking at the Booster turbines... [link=http://s42221013.einsundeinsshop.de/sess/utn;jsessionid=154a80b14bdd2ba/shopdata/0008_BOOSTER-Turbinen+=26amp=3Bslash=3B=3Cfont+color=25=23000080=3E=26amp=3Bslash=3B+BOOSTER-Jet+engines+=3C=26amp=3Bslash=3Bfont=3E/product_details.shopscript?article=0002_Booster%2B90%2BTurbine%2B%3D288090%3D29]Booster 90 (9kg - 20lb)[/link] or [link=http://s42221013.einsundeinsshop.de/sess/utn;jsessionid=154a80b14bdd2ba/shopdata/0008_BOOSTER-Turbinen+=26amp=3Bslash=3B=3Cfont+color=25=23000080=3E=26amp=3Bslash=3B+BOOSTER-Jet+engines+=3C=26amp=3Bslash=3Bfont=3E/product_details.shopscript?article=0011_Booster%2B130%2BTurbine%2B%3D288130%3D29]Booster 130 (14.5kg - 32lb)[/link] ? They both fit...
Posted on: 8/10/2009 7:52 PM by Author "hpais" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=9005987

RE: Boomerang Sprint Build Thread!
OK, as promised some pictures of my install... Regarding the landing gear question... [quote] I am deciding between Dreamworks Pro Link and Behotec for my LG. From what I can see online, the Prolinks use Australian wheels that seem to use rubber "O" rings to compress the inner drum, and act as the brake. The Behotecs appear to use metal on the drums, much akin to automotive drum brakes. Which brake is preferable in terms of wear, and/or smoothness of braking? What are the general pros and cons of Dreamwork Pro Link and Behotec landing gears? It seems a large number of people here are using Pro Link , some using Pro Lynx, few using Behotecs. [/quote] Firstly, which Behotec are you refering to? I suppose you're thinkign of the C36-2 with trailing legs... -> http://www.behotec.de/xtcommerce/product_info.php?info=p378_Trailing-leg-set-C36-2-for-Flash.html - I haven't found a Boomerang-specific kit in Behotec's site. I have the Prolinks on the Boomerang, an undescript landing gear on my CARF Eurosport, and a set of Behotec C21 on a small model. I'd say the following: - Cosmetically the Prolinks look good and Behotec look awesome. The Behotec are anodized black. Prolinks are satin aluminum. I've seen the C51 that CARF now uses on the Lightning and Tucano and it's a piece of beauty. [8D] - I've hard landed the Eurosport several times and bent and fixed it's ugly gear the same number of times. It's tough and sturdy. It's a standard oleo with a spring inside like the Behotec. I now have a "tool" which really is a dowel of the same diameter as the aluminum strut tube to unbend it, and a corresponding steel tube to unbend the strut support.[:D] - The prolinks on the Boomerang take landing abuses, but the spring weakens and if you land as bad as I do, you'll need spare springs. They don't seem to be as tough as the oleo on the Eurosport or the Behotecs. And if you let the model sit on its wheels you will weaken the springs as well. They do sag. And also the price is not the same... note that Dreamworks gear set includes everything but the #6 self tapping screws needed to fix the retracts. And it also comes with awesome valves (I got the Jettronics). The Behotec includes a basic valve (I'd say no valves), plus you may want to have another bottle for brakes, and more tubing. On the other hand, Behotec comes with Festo connects which are superior (IMO) to the Airpower that comes with the Dreamworks. As far as fitting the retracts to the Boomerang, my experience with the Dreamworks/Prolinx is everything fits, but you will need to dremel your way around some formers to open space for air lines on the mains, and for the retract itself on the nose. It's a clean installation with the wheel well covers hiding the dremel work. I don't know how the Behotec would fit the supplied plastic wheel well. As far as the breaks go, the weak link are the tires. If you land fast and slam on brakes you will make a flat spot on the tires. I have it happen on my o-ring based brakes on the Eurosport, so there is no magic bullet. Disk brakes, o-ring or even a tab on the tires will stop your plane well if you manage your speed. If you don't, it doesn't matter. It's the same in a full size plane. The brakes are a support, the solution is to manage the landing speed.
Posted on: 8/10/2009 11:05 AM by Author "hpais" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=9004649

RE: Boomerang Sprint Build Thread!
I dremeled the bulkhead out and the nose leg fits like a glove. I also use Futaba 3305 Analog servos as recommended. I'm yet to fly the Boomerang... got the shakes. Yesterday I crashed my Cap 580 on a hard landing... that's giving me the lack of confidence to fly the Boomerang. Don't want it to become a bummer! I will upload later some pics of my radio install. I used the included plate as a template and made a new one out of midwest plywood. Painted with nithrocelulose (car paint) and a coat of varnish did the trick.
Posted on: 8/8/2009 9:03 PM by Author "hpais" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=9000730

RE: Boomerang Sprint Build Thread!
Hi Joe, I just finished building my Sprint with the help of a professional builder. Not that the plane needed it, I'm the one who needed help ;-) I don't quite understand your question on tires, so I'll try to answer with what I did with my "master's" help: [quote]ORIGINAL: JoeEagle Hello all this is my 2nd jet, as i needed to realistically step back from my 1st jet and get more time under my belt with turbines to get my waiver and be more comfortable putting up an expensive plane. anyhow, i have a few questions. [/quote] Is your first jet the KingCat? I believe it flies a lot easier than the Sprint... from all I've seen and heard. [quote] 3. Patricia emailed the manual to me so i know how long the leads are for the rudders, elevator and aileron servos. how long do the leads need to be from the receiver to the rudder/ele/ail servos? 12''. do i need a 6'' or 12'' lead from the receiver to the flap or NWS servo? [/quote] In my build I made the booms and wings removable so I can carry them in the car, and I did glue the center wing to the fuselage so the retracts and flaps remain attached all the time. What I used was: - Elevator - 36" extension - Rudders - 24" extensions - Aileron - 12" extensions - Flaps - 24" extensions These extensions above will get you to the connecting point on the center wing that connects to another extension set which goes into the receiver. I mounted my JR1221 up front on the radio tray, so I needed a set of 5 x 24" extensions that bring the signal from the receiver to the exit points on the center fuselage. The NWS servo is under the receiver, I didn't need an extension. The flap goes straight into the receiver through the 24" extension. A 12" extension will not reach the center wing exit point if you mount the receiver up front the radio tray. [quote] 4. i don't see anyone using a hopper tank, just the BVM UAT or Hansen UAT. i have the 125 oz Elan JetTech tank i purchased for another project but always thought everyone used a header tank. is anyone using a header tank? [/quote] This very loong thread has mostly builders who used BVM UAT or the UAT that Patricia sells. I didn't see anyone with a standard header tank. Turbines don't like air bubbles and simply stop if they find one. The UAT is cheap insurance against a dead stick landing. Use safety wire in the tank connections, internal and external, or fuel line clips. [quote] 5. i will be planning on using a BVM smooth stop vice a Jet Tronics valve. looks like it might be a little tight? [/quote] I can't see why. Note that I used the included radio tray as a template to build my own radio tray since the original tray has a lot of useless holes. I used JetTronics but there was ample room for a BVM smooth stop or the UP valves that come with Todd's standard retracts sets. [quote] 6. i see a lot of guys are talking about aluminum tape to protect the stab. where do you purchase the aluminum tape? autoparts store? [/quote] Aircraft Spruce is where I got my tape. [quote] I know that Todd makes great gear, i have his struts on my KingCat and his complete LG setup with the 5 way Pro Valve on the CompArf Lightning (Ultra wings) that is on bench with one LG installed. i would really like to purchase the Dreamworks TL gear for this but budget is a little tight, as this is a replacement plane for a EF Yak that was destroyed and money is not growing on trees right now. [/quote] I got Todd's De Luxe set and I don't regret it. The difference to the standards is just the JetTronics versus UP's valves. They both work, it's a matter of personal preference. The retracts are more expensive than the plane in this case, but I believe they will outlast the plane specially because you'll be bouncing a lot on your first landings. The landing speed is reasonably slow, but it's still fast enough to rip out cheap retracts and their mounting blocks. Others may correct me if I'm wrong, but the ProLynx retracts that Todd sells will support any plane in the Sprint's weight range up to a 20 lb (9kg) plane. So you may reuse them in your 3rd plane. [quote] thanks all for your constructive comments. Joe [/quote] Hope it helps. Good luck Hermann
Posted on: 8/3/2009 5:20 AM by Author "hpais" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=8985553

RE: Best flying skymaster?
Guys, thanks a lot for the recommendations. Gonzalo, the videos are awesome, a true refreshing video. It looks like a lot of people are happy doing racetrack patterns. This one is great and inspiring. Ali, I admire your flying style and I saw your former Viper flying during the Itu Giants meeting last month. Awesome! Amazing! And you videos are my number one inspiration. In addition to the jets I'm building a Venus II to train pattern flying. I'm sure it will improve my maneuvers and make my jet flying that much more enjoyable. It looks like the MB339 is almost a unanimity! Viper also! I'll look into them. Enrique, I hope to see you in Manaus!!! I'll be there, no plane, but I'll go with de Santi and the Sao Paulo/Minas crew (Guerreiro, Pádua, Luciano Julião, Fernando Silva, Fernando Tachelli). My sincere Thanks! Hermann
Posted on: 7/31/2009 11:17 PM by Author "hpais" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=8980415

Best flying skymaster?
Folks, I need help making a hard decision... so many jets, not enough money, gotta choose one. So, having seen the fit and finish of several jets, of friends and club members, I've settled on the Skymaster line... that's one choice narrowed down. My difficulty is in choosing which one? They're all beautiful. I love the F86, F5/F20, F4, F15, Jas 39... given enough years I may end up having some of them. My level of experience so far is with a CARF Eurosport with a P160. Awesome flying jet and I love the handling. So this would be for my second jet, the first scale jet. I would like to make the main decision criteria the ease of flying and handling. Which of the above flies best? Which is the easiest to land? We have a 300m (900ft) asphalt runway, but I still would like to be able to fly from a 500 ft (150m) runway safely. The second criteria would be size. I can see the Jas 39 is the smallest one, but they don't look like they sell a lot here in RCU. And the F5 is huge, has to be taken appart to fit in any size car. Thanks for all the opinions Hermann
Posted on: 7/30/2009 9:16 PM by Author "hpais" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=8977502

RE: Sport jet for P80
My vote goes for the Bandit ARF. Very well made, flies awesome, beautiful in the field. I do not agree it's 45 minutes to put together. It's 2-4 screws per wing and that's it. The fuselage is kept together with stabs and rudder fin. My friend has the air attachments that autoconect with the wings, the only thing I would add is the Robbe multi-servo connector (Todd at dreamworks has both items). It would be a screw - fuel up - fly operation. A friend has one and we carry both his Bandit and my Eurosport together in the same car. I''ve helped him put his Bandit together and it's faster and more convenient than the Eurosport.
Posted on: 7/27/2009 8:14 PM by Author "hpais" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=8968909

RE: Boomerang Sprint Build Thread!
[quote]ORIGINAL: Turbinac George, Just drop me an email and you'll get the manual by return. sales@boomerangjets.com Mind if I have a little moan???? I follow the threads pretty closely and I have to say some of the claims and statements made about the details in the kits are pretty far off the mark. I pride myself on my integrity, personally flying exactly what we sell, and that includes ALL the hardware that sometimes gets insulted on this thread. All my models, personal and demo, have hundreds of flights on them. I have NEVER had a failure of any of the pushrods, clevises, hinges etc supplied in my Boomerang Jets kits and I do use the standard items supplied in the kits. If used and installed properly they will not let you down. Generally I keep out of the discussion, but sometimes it is a bit wearying to read some of those comments, many coming from those who have not given them any sort of genuine test. My XL is now four years old, hinges and horns out of the kit supplied, my Elans two years and Sprints about 18 months old, also using hinges, pushrods, clevises and horns as supplied. Still going strong after being pushed hard at many demos at shows and meetings and lots of flying at my club sites! Anyone is welcome to examine my models to test this truth. As for servo's, let's just say I don't agree with many of the opinions recently expressed regarding torque etc. Always better to be safe than sorry, of course, but overkill is the word that often springs to mind. Different scenario in a 200 MPH plus, heavyweight model, but that is not what we're talking about in this thread. I'll wait for the torrent of protests, but these are just my facts and opinions, and I guess I can put in my two cents worth here now and then, just like everyone else. [/quote] Hello Alan, Firstly let me say I do appreciate and respect a lot the work you do! Your jets are a hit everywhere, and almost every pilot has or had a Boomerang and only has great things to say about it. That's the reason I purchased it. I apologize if you felt ofended by my words, I should have written them differently. Secondly, thanks for being open to dialogue. I totally agree with the statement made by several other members about the great service we get both from you and from Patricia. I would buy another Sprint or Boomerang in a heart beat. Let me write the comments differently then, in the form of a suggestion: The Sprint is a high quality product and flyes very well even in the hands of total newbies like me. But being a jet, I believe that some items could be improved, even if they only add cosmetic value. The Sprint would fall in the size category of a Giant model or a very large pattern plane. In this category people are used to heavy duty hardware, so I believe that you could either spare the costs of the hardware currently being shipped and remove them from the kit, or add heavy duty hardware instead of the one currently in use. It's just a suggestion, and I agree it won't change the way how the plane flies or handles, but will improve the perception of quality in the whole package. Thanks again, Hermann
Posted on: 7/19/2009 7:11 PM by Author "hpais" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=8946932

RE: Boomerang Sprint Build Thread!
[quote] Thanks guys Yea I will probably go with the sprint and a p80. Thanks Again George [/quote] Hi George, I'm in my 3rd full day of work assembling my Sprint... so far I have a few comments, my 2 cents.: - The hardware that comes with the kit is garbage. Plastic clevises, terrible horns - I'm going to use DuBro heavy duty metal clevis, 4-40 threaded rods and heavy duty horns. If I were in the US, I'd buy the Central Hobbies titanium/carbon rods and MK horns made for pattern planes. I believe the kit deserves it. - The CA hinges are garbage. I glued them and then very easily ripped them off like 3 days later. So I spent the last day removing them and replacing also with the nylon hinges, glued with Epoxy (not CA). I would have saved a lot of work if I had gone with Nylon hinges from the get go. - I fuelproofed the balsa fuselage with Polyurethane paint, could have done it with an Epoxy Varnish. I think any two component coating would do but it's basically mandatory from what my fellow club members recomment. - The P80 fits well and it's what I'm going to use. But you need to coat the balsa surrounding it with a heat shield paint or BVM heat shild fabric. A friend has an Intro with a P70 and the balsa all around his turbine turned brown from the heat. Now he heat proofed it and 'the surrounding area feels cools to the touch after landing. - The P80 will heat blast the elevator servo, there are pictures here on this thread of how to protect it with aluminum tape. I haven't decided what I'll do but definitely be aware of the heat. - You will need a strong servo like the Futaba 3305 (8kgf torque/240oz-in) for all around. And a stronger servo like the 9156 (25kgf/) for the elevator. I have witnessed an Intro going into full flutter on rudders on a dive. Basically the servos weren't strong enough and the CA hinges let go. Anyhow the remains of the plane had ripped CA hinges. I apologize if I sound like I just discovered black powder, but the Sprint looks like a trainer but remember it's a Jet. It will fly very fast, over 150mph, the forces on the surfaces are very high. It's very well built from the factory but it demands a very careful construction. My only complaint is that for the price, Alan should have included decent hardware and hinges with the kit. Hermann
Posted on: 7/14/2009 7:54 PM by Author "hpais" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=8933675

RE: Fuel costs and options
Everyone around here flyes on Jet A-1 exclusively... I haven't seen parafin oil for sale.
Posted on: 7/3/2009 3:11 PM by Author "hpais" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=8903887