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RE: C-ARF Ultra Flash build Thread + Video
[quote]ORIGINAL: izzy ATTACHED PIC SHOWS THE ALUMINUM BRACKETS CUT DOWN AS MUCH AS POSSIBLE , AND EVEN SOME OF THE MOUNTING LUGS CUT TO TRY REDUCE HEIGHT WHERE THE SERVO TOUCHES THE BLUE FOAM SEEMS IHAVE NO CHOICE BUT TO CUT INTO THE FOAM WITH A DREMEL, AND THEN LAY SOME MICRO GLASS TO BRIDGE THE CUT - [/quote] This is the best way. I just finished my UF and cutting the metal brackets and a slight sanding on teh one servo mount will allow the 8411 to fit.
Posted on: 9/17/2012 5:06 PM by Author "rcand"
in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11231668
Ultra Flash pilots
Can you who fly the UF with the top fuselage tank and the wing tank, which way you have your fuel drain? Is ther a preference or noticeable difference in the landing with a fair amount of fuel left if it is in the wing tank or the fuselage tank?
Posted on: 9/2/2012 6:15 PM by Author "rcand"
in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11215026
JR DSMX
Has anybody had any issues after converting your 12x from the old DSM2 to the newer DSMX?
Posted on: 8/26/2012 11:08 AM by Author "rcand"
in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11206536
RE: C-ARF Ultra Flash build Thread + Video
[quote]ORIGINAL: PHIL GREENO I find the movements given in the manual for elevator and aileron too much.I know this is a personal preference but for thUF i use as below. Elevator +10mm up - 11mm down (measured at tip) 50% expo - flight mode 1 normal flight 25% expo landing flight mode 3 Aileron   +9mm up  - 10mm down(measured at tip) 45% expo - same in all flight conditions. Phil [/quote] thanks, big help. I thought the measurements in the manual were a bit much
Posted on: 8/25/2012 3:27 PM by Author "rcand"
in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11205819
RE: Ultra flash or Bandit
[quote]ORIGINAL: KFX450 I'm thinking of my next winter project and I'm trying to decide between the two. I had my heart set on a bandit but I was just watching an ultra flash and it made me think twice. Price point being a really good factor. Don't want to start anything here but would like to hear from people on thoughts. I find this a good place to sway my decision. Would like to hear from some people that have flown both. Thanks in advance. [/quote] I have built and flown many bandits except the Ultra and now building an Ultra Flash. When it comes to building, the Bandit is hands down over the UF. Both fly great
Posted on: 8/24/2012 6:17 PM by Author "rcand"
in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11204978
RE: C-ARF Ultra Flash build Thread + Video
Setting up the control surfaces on my UF, the manual gives amount of travel but does not say to measure at the tip or root of the elevator or aileron. Anyone know. I believe they call fro 22mm at high rate for both.
Posted on: 8/24/2012 6:09 PM by Author "rcand"
in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11204970
RE: C-ARF Ultra Flash build Thread + Video
[quote]ORIGINAL: Walo I maidened mine last week. Unfortunately the first landing was a ''Snap Landing''. Deceleration was much faster then I expected (100 mm or 4 inches landing flap). Nothing happened but my next landings were way too fast what resulted in bumping and some damage to the nosegear. After studying the messages in this forum I will reduce the amount of flaps for my landing configuration. Regards Walter http://youtu.be/rqWCNXOwuOU [/quote] some others have had the same problem. they fixed it with 3 1/4 inches of flap and 10 mm of crow
Posted on: 8/19/2012 5:12 PM by Author "rcand"
in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11199044
RE: Ultra Flash Bypass and inlet fit
[quote]ORIGINAL: Andrew Bailey Which turbine do you have installed? [/quote] getting a rabbit 100. Started working on this tailpipe, bypass, inlet thing and saw some problems. I will not bolt everthing up until I get the turbine mounted properly, center line of thrust down the tailpipe, then I can see about the bypass.
Posted on: 8/19/2012 4:48 PM by Author "rcand"
in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11199021
RE: Ultra Flash Bypass and inlet fit
[quote]ORIGINAL: Dave Wilshere A photo would help... But normally the two line up OK. Sometimes a small amount of heat from an air gun is required to reshape things after they left the mould and settled, but I have built two UF and 3 Flashes and none required much work. Dw [/quote] A little heat will not work here. The vertical alignment for the front of the bypass to the back of the inlet extension is off by 25-30mm
Posted on: 8/19/2012 10:25 AM by Author "rcand"
in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11198716
Ultra Flash Bypass and inlet fit
Building an Ultra Flash and the bypass is no where close to align to the back of the inlet extension. Anybody run into this and if so, what did you do to fix it.
Posted on: 8/18/2012 6:18 PM by Author "rcand"
in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11198220
RE: CARF Ultra Flash
[quote]ORIGINAL: Jack28 Luv2flyrc, I fly mine with a Cheetah, I find it hard to slow up for landing, and end up bouncing the landing. I have a New Rabitt 100 in my Boomerang Elan. I have thought about swapping it into the Ultra to see if the residual thrust is the problem. It just keeps going and going with the Cheetah I find it hard to land without that damn bouncing, I grease the landing and it still gets back up and bounces flying on grass. I only have 7 flights on it and only three landings were good ones, all the rest bounced, I broke gear pins once. Any suggestions my cg is at at the rearward cg reccomended in the manual. Tried 4'' flap no crow, tried , 4'' with crow still fast on landing. Growing fustrated ,Love the way it flys its an awesome sport jet . Everyone says it lands great , I have over 265 flights on the Elan and its simple too land and never bounces. Thanks JAck. [/quote] Try more flap and crow like sailing1 has. I had the same problem with a BVM electra and fixed it with crow, also keep trying to hold it off, like you are trying to stall it as it touches down.
Posted on: 8/7/2012 5:45 PM by Author "rcand"
in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11184860
RE: Xtreme Jets 1/8 scale F-16
[quote]ORIGINAL: smchale If you aren't scared to do a little building and finishing, I think the Avonds F16 would make a nice EDF. Comes with ducting so a dynamax, ramtech, DS-94, etc is a drop in fit, even with scale gear. It's slightly larger than your target, but it's likely lighter than any ARF on the market. [/quote] ok thanks
Posted on: 8/5/2012 4:31 AM by Author "rcand"
in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11181433
RE: Ultra Flash CG
ok, thanks from both of you. I had figured the 220-225 was very conservative and could be moved aft.
Posted on: 8/5/2012 4:28 AM by Author "rcand"
in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11181431
RE: CARF Ultra Flash
[quote]ORIGINAL: Ramz http://www.youtube.com/watch?v=o0uUNg543iQ Here is mine with Kingtech 170. Not sure what the top speed is but it has to be approaching 240. (the radar couldn't pick it up) Flew it beside a buddy's New Rookie that was clocked at 222mph and it is considerably faster. If you don't need a ''speed plane'' like you say, you don't need anything more than a 120. Like the boys have said, one of the new Rabbit 100's or a 100RX would be a great choice. I do find mine has a fair bit or residual thrust but it is easily manageable with a nice long, decent approach and alot of flaps. I normally fly off of 450ft of grass and usually use about 250 ft before she stops. I wouldn't trade my UF for anything....ever. It is worth every penny. Stratotanker here on RCU makes and sells a wooden stand that is built specifically for the UF...buy one if you haven't already. It is worth every penny (if memory serves, it was right around 100 bones). It makes it soo easy to transport, assemble, disassemble and work on at the field...both upright and inverted. This will prevent any delamination on the rudder or elevator hinges during transport. Like it has been said, the delamination issues are typically user induced. [/quote] thanks, sounds good
Posted on: 8/4/2012 6:03 PM by Author "rcand"
in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11181104
RE: JR 12X Owners - Upgrade your battery pack to Eneloops
[quote]ORIGINAL: sandslx The problem is people get a new 12X and they cant wait to play with it so they take it out of the box run the battery down and then charge it overnight...this does not do the Nimh any favors in memory. It needs to be charged for 25-35 hours straight. I know it does not say it in the manual and I am guilty too. This is what I was told from the JR camp. I am just spreading the good word on how to make your Jr Nimh last longer. Justin Sands BVM rep Team JR/Horizon [/quote] That may be part of the problem but when I got my 12x, I charged completely at first then did all the radio set ups etc. The charger is junk, had JR replace the pack and then used a quality charger and the battery still did not perform. I changed mine to enelope as soon as it was available and love it.
Posted on: 8/4/2012 3:14 PM by Author "rcand"
in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11180962
Ultra Flash CG
For you guys flying the Ultra Flash. Where have you found the best CG? CARF recommends 220-225 mm from the front wing/fuse joint. Is this ideal?
Posted on: 8/4/2012 3:11 PM by Author "rcand"
in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11180961
RE: CARF Ultra Flash
[quote]ORIGINAL: wojtek All flashes and ultras have potential for skin delamination along the hinge areas . The elevator is especially prone to this problem. Usually this will never manifest itself from flight, however transport and ground handling can attribute to this. In the case of the elevator, a bounded landing , or a nose high landing on rougher surface can cause the elevator horns to get pushed up and peel up the hinge area. Bumping the other surfaces can cause a similar problem. Very few have also claimed they have had surface separation after many flight, however there is a possibility this was also from ''handling'' just went unnoticed for some time. hmm, funny some who have posted here already have had this problem and and posted about it in the past .. All said, the UFlash is my favorite sport jet I have ever flown ... and yes, I have had a delamination issue after hitting a divot on a runway and having my plane bounced .. in the air, the plane will take what you can throw at it .. http://www.youtube.com/watch?v=n8VP4TjRlNI&hd=1 [youtube]http://www.youtube.com/watch?v=n8VP4TjRlNI[/youtube] ~V~ [/quote] Nice video, what turbine is in this one?
Posted on: 8/3/2012 2:34 PM by Author "rcand"
in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11179963
RE: CARF Ultra Flash
[quote]ORIGINAL: luv2flyrc [quote]ORIGINAL: gooseF22 when I had the 160 in it, we kept dialing it back...ended up around 24-26 lb thrust.. plenty to go vertical (midwest).. If you have all the speed out of your system, then build it light weight and use one of the smaller lighter engines.. thats what Im doing this winter.. I saw one fly recently with a Tam pipe, lighter servos, and less than 20lb overall weight..yes, less than 20lb.. with a P100.. it flew absolutely beautifully.. would slow to a crawl.. plenty of smash.. Im going to put a wren 100 in mine with the stock pipe, and toss the pilot/cockpit, and take out the smoke.. that should bring me in around 22lb.. FWIW [/quote] Yea, I have to agree with you. I prefer the lighter wing loading, less residual thrust and being able to slow it down, though a lot of flap can assist there. I was planning on the Rabbit, but I like to see what others have done and the results they get. Like I said before, I don't need to go ballastic, spent 10 years flying bandits doing that, getting older, like to relax a little more. Totally agree, have flown flash with Rabbit 100 at 21lbs, and Cheetah at 22lbs aircraft weight. With the lighter engine, the plane handles SO nice, still does 180mph, take off and landings in 150ft. It is faster with the Cheetah, about 225mph but, doesn't ''feel'' as light and becomes more of a straightline speed plane.Also, higher residual thrust and more time to spool down with a bigger engine. I like the way it will slow to a crawl with the smaller engines. I fail to see why people continue to hang bigger and bigger engines in them? You get marginal speed gains and lose handling. The Flash was designed as an aerobatic sport jet, not a speed plane. Mike [/quote]
Posted on: 8/3/2012 2:29 PM by Author "rcand"
in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11179955
RE: CARF Ultra Flash
[quote]ORIGINAL: basimpsn [quote]ORIGINAL: SniperWj the 180rx work just like what you said. I can give it unlimited vertical come out from slow and low pass. one word..awesome! mine weight 10.5kg uat full but tanks is empty yiming [/quote] I wouldn't use any turbine with thrust rating higher than a 170, I did the K-180 in my ultra Flash [8|] although the full throttle was not a problem, but my idle thrust was too much for landing. So I swap with my k-170. Notice my video I had to bleed off speed before take off [:)]. http://www.youtube.com/watch?v=k357mbHFCmI [/quote]
Posted on: 8/3/2012 2:23 PM by Author "rcand"
in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11179947
RE: CARF Ultra Flash
[quote]ORIGINAL: indubitably P 100 RX will push it to 215, but it takes a while to get there. Take off needs 400 ft, and the speed builds slowly. Once up to speed, it will go vertical possibly 1,000 feet before perceptably slowing. And low residual thrust is nice. The P120 SX Will be all around faster getting there, and higher top end. The 160 is frequently used, and is lively, but will not hold a vertical climb if you start slow and point vertical, and hold it. I cannot wait to see what the P180RX will dow for this plane. Will find out in a few weeks when a friend picks his up. We will probably radar him for reference.. The vertical should accelerate, and the take off should be under 200 ft. estimated. The P200SX wont fit, without a lot of work, and im not the one to do it. :( [/quote] Thanks, good info here. I heard, I think it was Ali in England, either he of someone else ther put a Rhino in one and it is outrageous.
Posted on: 8/3/2012 2:21 PM by Author "rcand"
in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11179942
RE: C-ARF Ultra Flash build Thread + Video
[quote]ORIGINAL: lightningmcnulty Here is mine, its powered by a k140 kero start that i'm running on diesel, love this engine. Started the build on a monday night finished it and maidened on Saturday that same week, this thing goes together so easily and flys so well and costs so little I defy anyone to tell me of a better sport jet deal available today. And to top it all off gary from efflux rc came to our field yesterday with a radar gun I did some fast passes and stopped when I reached 250mph upwind, thats with a slightly nose heavy setup into around 6mph wind and missing one of my main strut covers (lost it in a mid air but thats another story) Also i'm told by Dirk from kingtech that once the engine goes in for service I will get another 4 or 5 lbs of thrust!!! [IMG]http://i865.photobucket.com/albums/ab217/lightningmcnulty/things%20for%20sale/e90ab7cd.jpg[/IMG] [IMG]http://i865.photobucket.com/albums/ab217/lightningmcnulty/things%20for%20sale/fe0f21c6.jpg[/IMG] [IMG]http://i865.photobucket.com/albums/ab217/lightningmcnulty/things%20for%20sale/fe0f21c6.jpg[/IMG] [IMG]http://i865.photobucket.com/albums/ab217/lightningmcnulty/things%20for%20sale/38b3a1ed.jpg[/IMG] [IMG]http://i865.photobucket.com/albums/ab217/lightningmcnulty/things%20for%20sale/e9099b28.jpg[/IMG] If your looking through this thread unsure if you should buy an ultra flash, GETÂ ONE, and I strongly suggest getting a K140 from Barry to power it, they are a perfect pair! Kim [/quote] Can you tell me a good but slightly conservative measurement for the CG?
Posted on: 8/2/2012 6:12 PM by Author "rcand"
in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11179116
RE: CARF Ultra Flash
OK, thanks for everyones replies. Great help. I know they recommend 22-26 pounds of thrust. Any recommendation from you guys who are flying them. I don't need to go ballstic but like good performance. I guess I got all the speed stuff out of my system flying Bandits for years.
Posted on: 8/2/2012 5:56 PM by Author "rcand"
in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11179092
CARF Ultra Flash
I have heard CARF makes quality planes. Has anyone had any problems with any delamination of skin hinging , flutter or anything of concerns?
Posted on: 8/1/2012 3:59 PM by Author "rcand"
in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11177655
RE: Xtreme Jets 1/8 scale F-16
Thanks for the advise
Posted on: 7/30/2012 3:09 PM by Author "rcand"
in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11174984
Xtreme Jets 1/8 scale F-16
Anyone have one of these? I am curious about turbine versus electric in this. Any feedback would be appreciated.
Posted on: 7/29/2012 1:57 PM by Author "rcand"
in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11173550
RE: Wife was NOT amused . . .
does it come in other colors
Posted on: 7/22/2012 12:48 PM by Author "rcand"
in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11164640
RE: BVM Jets Photo and RC Plane Bomber
Wow, that is disappointing to hear, I have known Bob almost 30 years and no matter waht anyone else says about this is old news or whatever, it is still someting that a concerned modeler saw on the a trusted web site and everyone deserves to be spoken to with respect and curteously. I guess everyone forget about our battles with the FAA trying to regulate us. even if you were totally off the wall, he could have been nice about explaining he side. Oh well, chaulk one up for experience.
Posted on: 7/22/2012 12:46 PM by Author "rcand"
in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11164639
RE: BVM Air Fill Valve- How do u get air in them?
[quote]ORIGINAL: carbunkle I never had any of these on previous jets. I thought I'd splurge a little and get some fancy high buck valves. So what's the trick to get air in them. I've tried everything in my shop. http://shopbvmjets.com/zencart/index.php?main_page=product_info&cPath=10&products_id=45&zenid=43942b407mf5o51531obu0cd54 [/quote] I use many of these and I attach airline tubing to the air pump, then I push the free end of the airline tubing into the fill valve. Sometimes a slight bevel cut allows it to fit inside the valve easily. I don't mess with fancy connectors anymore.
Posted on: 7/15/2012 3:02 PM by Author "rcand"
in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11156355
RE: What causes gear doors and thin parts to warp weeks after they are dry?
[quote]ORIGINAL: David Searles [size=3]Fender, You probably don't want to hear this, but here it is: The problem is with the quality of the epoxy used at FEJ as well as the fact that they tend to pull these parts from the mold too soon, before they are completely cured. I have owned six FEJ aircraft and every single one has shown this defect. Also the problem tends to only get worse with time. Eventually you will begin to see warps and bubbles in the control surfaces and perhaps even in the fuse body as well. David S[/size] [/quote] I tend to believe what you summized is true. I have had dozens of jets from BVM, Airworld, SM, Extreme and never had this problem.
Posted on: 7/15/2012 2:58 PM by Author "rcand"
in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11156347
RE: Where do I put my gyro?
[quote]ORIGINAL: megafly Do you think is better in the roll axis or the yaw axis? Thanks. [/quote] depends on the plane and what you are trying to correct. I had a super hornet and have an airworld cougar and those planes were/are very stable when placed on the ailerons. I have it programmed on the gear switch so I have more sensitivity when the gear is down and less sensitivity when flying, plus I can adjust inflight if needed or turn it off.
Posted on: 7/11/2012 5:28 PM by Author "rcand"
in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11151903
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