RE: Explain: Which is correct?
You apparently misread the post. the question was which is Correct. This was a question I asked in a different post, a total of 10 anolog servos three examples, As long as you don't exceed [b] 8 Amps at peak and 3 Amps continuous, [/b]you'll be OK. Receiver Technical Information I need to know the amp draw on your (blank) receiver as I am using a large number of servos on my plane. On all Futaba receivers the amp draw will be [b] 8 amps continuous and 10 amps peak. [/b] I am wondering about the amp draw on my receiver. I am using eight S9351's, three S9352's and one S9252's, each in its separate channel. What effect will these have on my receiver and can it handle the load? [b] The receiver will not have a problem with the number or type of servos used. [/b]A large number of servos, such as the number that you are using, could cause the battery voltage to drop below what the receiver requires. You would want to make sure that your servo and battery wiring could handle the current needed from the servos without giving you much voltage drop. Many times this is why NiCd batteries are preferred, as they can deliver more current with less voltage drop than many other battery types The first 2 conflict with each other, the 3rd, does,nt seem to matter that he is running 12 digital servos, I know about the battery power, it was in my previous question. [b]So, Which is correct?[/b]
Posted on: 5/20/2013 8:28 AM by Author "CoolerByTheLake" in the forum "Futaba Radios Direct support forum"
http://www.rcuniverse.com/forum/fb.asp?m=11516564

Explain: Which is correct?
Two part question, Please answer both. Bax, In this post- http://www.rcuniverse.com/forum/m_11511276/tm.htm I asked the question Can the R617FS handle all 10 servos? Your reply was: As long as you don't exceed 8 Amps at peak and 3 Amps continuous, you'll be OK. Now in this : http://www.futaba-rc.com/faq/faq-receivers-q962.html, regarding large number of servos, Futaba said this: [u] On all Futaba receivers the amp draw will be 8 amps continuous and 10 amps peak. [/u] Which is correct? Regarding multiple servos, I also found this: FAQ I am wondering about the amp draw on my receiver. I am using eight S9351's, three S9352's and one S9252's, each in its separate channel. What effect will these have on my receiver and can it handle the load? The receiver will not have a problem with the number or type of servos used. A large number of servos, such as the number that you are using, could cause the battery voltage to drop below what the receiver requires. You would want to make sure that your servo and battery wiring could handle the current needed from the servos without giving you much voltage drop. Many times this is why NiCd batteries are preferred, as they can deliver more current with less voltage drop than many other battery types. While it doesn't say which" rx he had, assuming as it was stated in the FAQ (On all Futaba receivers the amp draw will be 8 amps continuous and 10 amps peak.) he then can run 12 digital servos without worry, given strong enough Rx battery pack (Like the one listed below) Correct? I am seeing way to many contradictions here. This was the batt pack that was in previous post I made, there was no mention made that is was/ was not sufficient! A123 Systems 26650 Nano M1 Pack Pack Voltage: 6.6v 2300ma Rating: 30C (69.0A) Continuous Regading dual power feeds to Rx. Also, in checking with others, they suggested running dual feeds into Rx, either an additional pack or secondary feed from battery, both used on a Y-harness for the highest drain servo/'s. Possible? If not WHY? Spectrum can do it. http://www.rcgroups.com/forums/showpost.php?p=16620802&postcount=20 or this: http://www.rcgroups.com/forums/showpost.php?p=25028781&postcount=2 Thanks.
Posted on: 5/18/2013 4:42 PM by Author "CoolerByTheLake" in the forum "Futaba Radios Direct support forum"
http://www.rcuniverse.com/forum/fb.asp?m=11515424

RE: R617FS voltage?
[size=2]Thank you kind sir, exactly what I needed to here.[/size]
Posted on: 5/17/2013 9:02 PM by Author "CoolerByTheLake" in the forum "Futaba Radios Direct support forum"
http://www.rcuniverse.com/forum/fb.asp?m=11514869

RE: AD eScorpion Mk2 has arrived.
Thanks. I ask because I'm scratch building one, just a little larger. WS=52"-Length 61.5" I have the Spring air 102HD's. A little bigger wheels for grass, 2 1/4" nose, 2 1/2" mains. It's kind of a cross between the E model and the turbine version, only working off a drawing. It's not exact, but you know it's a Scorpion!! [:D] The weights were also appreciated. EDF scratch build forum @RCG
Posted on: 5/17/2013 8:59 AM by Author "CoolerByTheLake" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11514254

RE: Servo amp draw?
Thanks A.T. I will go though it and digest the info. The other simple solution is to run two rx's, I do have another one. Will certinly take out the guess work!![:D]
Posted on: 5/16/2013 3:42 PM by Author "CoolerByTheLake" in the forum "Hitec/MultiPlex Radios- Ask Hitec Customer Service"
http://www.rcuniverse.com/forum/fb.asp?m=11513570

RE: AD eScorpion Mk2 has arrived.
You didn't mention servo's , so I guess those will come later. I do want to ask which/what retracts, struts and wheels (and size) you used. And thanks for the weights.
Posted on: 5/16/2013 2:19 PM by Author "CoolerByTheLake" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11513497

Servo amp draw?
Just recently asked in the Futaba support forum, what the capacty of the R617FS rx is, regarding amount of servos it can handle. The reply was this: As long as you don't exceed 8 Amps at peak and 3 Amps continuous, you'll be OK. Ok that said, I also had listed what servos I plan on using, this first; Right from Hitec My question:: I just recently bought (5)- HS-225MG’s, (2)- HS-645MG’s, (2)- HS-85MG’s and (1)- HS-81, all of which suggest they can run at 6.0V. Can they/will they accept the use of a Life battery @ 6.6V? Answer:Any servos that are rated at 6V will typically be fine at 6.6v. Mike Mayberry Customer Service Team Manager Hitec/Multiplex USA Here's how they will be used: a totoal of 10 all Hitec's 5-HS-225MG's-2-aileron, 2-elevators 1-steering 2-HS645MG's-flaps 2-HS85MG's- rudders 1-HS81- retract valve Now how do I figure out if they meet this objective? [u]As long as you don't exceed 8 Amps at peak and 3 Amps continuous, you'll be OK. [/u] Just want to get this set-up right the first time. HELP ME OUT, PLEASE!t
Posted on: 5/16/2013 10:51 AM by Author "CoolerByTheLake" in the forum "Hitec/MultiPlex Radios- Ask Hitec Customer Service"
http://www.rcuniverse.com/forum/fb.asp?m=11513321

R617FS voltage?
Thanks for the reply on my 10 servo question, but it seems you only answer each question once!! You did not address this statement right or wrong. "I've done some searching here on acceptable V's for theR617FS, and it seems that there shoud be NO issue using 6.6V RX pack. " Perhaps because I indicated the type and size of battery I plan on using you let it slide. I'll ask bluntly, Can the R617FS rx handle 6.6v's? I do realize that battery capacity and C rating are a factor in proper operation, but that's not the questio. Thanks
Posted on: 5/16/2013 10:30 AM by Author "CoolerByTheLake" in the forum "Futaba Radios Direct support forum"
http://www.rcuniverse.com/forum/fb.asp?m=11513301

RE: R617FS-10 servos?
Thanks Bax. as far as batt voltage for the rx, as long as there's sufficent power there (say 20-30c) 6.6V isn't an issue, correct? Just want to make sure .
Posted on: 5/15/2013 9:15 AM by Author "CoolerByTheLake" in the forum "Futaba Radios Direct support forum"
http://www.rcuniverse.com/forum/fb.asp?m=11512269

RE: more thrust from ducted fan?
You might want to check out the post more carefully, it's over 7 YEARS OLD!!!!
Posted on: 9/9/2012 7:29 AM by Author "CoolerByTheLake" in the forum "Electric RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11222665

RE: the cone info
Rule of thumb says, thrust tube [u] exit [/u] (small dia.) is equal to approx 85% fan FSA(Fan Sweep Area) Just measure the inside dia of fan shroud, and the outside dia of motor tube, plug the numbers into the calc and will give you the right dia for your "cup"[:D] Keep in mind 85% is only the average, it all depends on the plane you have, the size of the fan. You may have to experiment a touch, but only a mm at atime. The bigger the exit, more thrust , less speed. Smaller exit more speed, less thrust. What size plane and weight is it? Also, what size fan 70mm-90mm? Other? Motor Kv and battery size will also make a difference. If you plan on just slapping any old fan and motor in it, results may vary. All components need to compliment each other to get best performance.
Posted on: 9/8/2012 10:10 PM by Author "CoolerByTheLake" in the forum "Electric RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11222427

RE: f 86 e.d.f.
My guess was pretty close, JHH F-86 is WS 50" Length 50" You have to figure mine is 30% larger than yours, and needs more fibeglass.[:D] And as far as weight, with retracts, struts, wheels, 8 servos, 12s for batts, fan, an other misc fasteners, that in itself comes to over 8lb. If I can get the airframe, less all components to come in at 6-6.5lbs, I will be happy. Funny thing, the difference between RCU and RCG, if you want the latest on EDF, you do RCG, AT RCG if someone is looking to go with turbines, they send them here, to RCU. Nice thing having 2 great sites.
Posted on: 8/22/2012 12:03 PM by Author "CoolerByTheLake" in the forum "Electric RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11202331

RE: f 86 e.d.f.
[quote]ORIGINAL: hrdflite my fuse weighed 18.5 oz. when it came out of the mold. [/quote] Great weight! congrats. Still what is WS? What size fuse is it for the 18.5oz?
Posted on: 8/18/2012 7:53 PM by Author "CoolerByTheLake" in the forum "Electric RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11198278

RE: f 86 e.d.f.
Must be about JHH size-50"WS. Glass weight is what, around 7/8oz sqyd total lay-up? Looks good. Pretty scale, except the intakea little on the large size. I'm Scratch building one for a JetFan 90 on 12's with around 13lb thrust. Length 63" WS 64". Not sure on weight yet, but some where around 14-15 lbs. Just a touch bigger than a BVM F-86. I'm using Robart 557RS nose gear (2.75" wheel) and 530RS mains (3.25" wheels). Here's a pic or 2 of mine before I cut it off the plug. I was shooting for fuse weight of around 25oz, but it came out at 29oz. Here's a couple of links for some JetFan 90 F-86's http://www.rcgroups.com/forums/showpost.php?p=21464997&postcount=628 http://www.rcgroups.com/forums/showpost.php?p=21885027&postcount=766
Posted on: 8/16/2012 8:52 AM by Author "CoolerByTheLake" in the forum "Electric RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11195746

RE: f 86 e.d.f.
What is the size? Length, WS?
Posted on: 8/11/2012 3:31 PM by Author "CoolerByTheLake" in the forum "Electric RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11189617

RE: BVM Help
An odd request. I'm scratch buildng a 1:7.3 scale Sabre. What I'm looking for is the root airfoil that is used on the BVM F-86. Would some one be willing to trace theirs out. Could be done the way Profili prints theres out, 2 halves on a sheet. Please PM me if you can help me out. Mark
Posted on: 6/7/2012 7:23 AM by Author "CoolerByTheLake" in the forum "RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=11109918

Rossi 65 speed
Figuring that you guys like to go fast, thought you would like to check it out. Have had this sitting around for awhile, bought it NIB some years back. Have only ran it twice, just to see how it ran, and ran IT DID. Sounds like a hornet with it's A$$ on fire!. When it comes on the pipe, yea haw. Don't have tach, but my guess is well over 20,000RPM (on a Zinger 11X7.5) comparing it to my OS91VRDF. Don't have any use for it and thought maybe someone here might? Will be listing it soon. Pics will explain. If you are interested, PM me.
Posted on: 11/3/2011 11:09 AM by Author "CoolerByTheLake" in the forum "Extreme Speed Prop Planes"
http://www.rcuniverse.com/forum/fb.asp?m=10789468

RE: Create vacuum???
I should have posted this photo too. The people I have talked with, and tested it, in this configuration, say that the motor stays pretty cool. The back does have plenty of air flow. This is the same turbine body as in other photo.
Posted on: 10/31/2011 9:27 PM by Author "CoolerByTheLake" in the forum "Aerodynamics"
http://www.rcuniverse.com/forum/fb.asp?m=10791557

RE: Create vacuum???
Sorry, Jet PLane, I got if off a thread on RCG. I don't think that even with the holes in the adaptor, there will be enough air going between the rotor and housing, only 2mm max, to realy cool front of motor
Posted on: 10/31/2011 11:47 AM by Author "CoolerByTheLake" in the forum "Aerodynamics"
http://www.rcuniverse.com/forum/fb.asp?m=10790830

Create vacuum???
This in reguards to creating a vacuum in this turbine body. First this is not mine, how ever it will look much the same. Now here's the deal. Changing from ICDF to EDF on this Dynamax fan (body only here). You can see the insert for the motor in photo. When the rotor is arrached the clearence between turbine body and hub of the rotor is only about 2mm. ( Hub covers entire front of turbine body) First, even though the center of adaptor has holes for cooling, will that 2mm clearence be enough to get a vacuum going? Or would drilling, say 4 holes, either straight or at a angle, behind the adaptor ring help in creating some type of vacuum? Keeping in mind that the rotor will be spinning at up to 27.000 RPM's. Thanks for your help
Posted on: 10/30/2011 8:33 PM by Author "CoolerByTheLake" in the forum "Aerodynamics"
http://www.rcuniverse.com/forum/fb.asp?m=10790064

RE: Removing duct fan blades
That doesn't tell us anything. What size= mm. What manufacturer?
Posted on: 10/27/2011 11:02 PM by Author "CoolerByTheLake" in the forum "Electric RC Jets"
http://www.rcuniverse.com/forum/fb.asp?m=10786138

RE: Fuse strengh?
Thanks. Here's my project- a replica of a Y/A Starfire. I'm going mostly from the many build photos I have from several build threads on RCG. My plug, still in shaping stage and a couple to show some of the carbon fiber locations.
Posted on: 10/4/2011 9:36 PM by Author "CoolerByTheLake" in the forum "Composites Fabrication And Repair"
http://www.rcuniverse.com/forum/fb.asp?m=10747749

RE: Fuse strengh?
I have be told that 8-9 oz/sq/yd should be strong enough. Now consider that there will be 3'' carbon fiber in nose gear area, 2 strips, each side of center, from intakes rearward, past both formers for wing and fan mounting. There will be a access hatch, to get at fan and other component. Where the 2 formers will be,wing and fan mounting, there will be carbon fiber from side to side. Carbon tow as needed in the exhaust tube.
Posted on: 10/2/2011 5:17 PM by Author "CoolerByTheLake" in the forum "Composites Fabrication And Repair"
http://www.rcuniverse.com/forum/fb.asp?m=10745455

RE: a first plans build..??
Sorry, bad link
Posted on: 9/23/2011 10:32 PM by Author "CoolerByTheLake" in the forum "Scratch Building, Aircraft Design, 3D/CAD"
http://www.rcuniverse.com/forum/fb.asp?m=10731535

RE: Stab and Fin airfoils.
Thanks, Shoe, I am no wizzard on this stuff, but in trying to get close to whats on the plan , it seemed to work out OK.
Posted on: 9/3/2011 12:45 PM by Author "CoolerByTheLake" in the forum "Aerodynamics"
http://www.rcuniverse.com/forum/fb.asp?m=10699817

RE: Fuse strengh?
It will be a jet fuse for a Dynamax fan. The fuse will be approx 62" long, 8" high , at widest point,ducts about 101/2" . Similar in shape to most 5" fan jets.
Posted on: 8/29/2011 5:26 AM by Author "CoolerByTheLake" in the forum "Composites Fabrication And Repair"
http://www.rcuniverse.com/forum/fb.asp?m=10691586

Fuse strengh?
Going to glass right over plug and use lost foam method. I'v been told, by a few who do make there own molds that 3 layers of 3oz glass should be fine. It will also have carbon fiber and tow in all high stress areas. Several have done this and worked well. Not making a mold, too costly, and easier to make another plug. So, is 9oz of glass going to be strong enough?
Posted on: 8/28/2011 9:24 PM by Author "CoolerByTheLake" in the forum "Composites Fabrication And Repair"
http://www.rcuniverse.com/forum/fb.asp?m=10691323

Stab and Fin airfoils.
I recently got a set of construction plans of a jet from a friend. So no dimentions, type of airfoil, materials, etc... Measured plans and all seems to be correct. My question is on the tail feathers. All I can go by is the airfoil on plans. Have checked on Profili 2 to macth up airfoils, and just about dead on. It seems the stab is very close to NACA 64-008A. This is 8% @40%. It is a very popular plane, and don't want to loose its great flying characteristics. Does anyone see a problem with this airfoil for the stabs? Thinking of using the same airfoil for vertical fin, just skinnied it up a little by using X-foil. BTW, the wing has its high point at about 37%-40% too. Your thoughts.
Posted on: 8/25/2011 1:45 PM by Author "CoolerByTheLake" in the forum "Aerodynamics"
http://www.rcuniverse.com/forum/fb.asp?m=10687054

RE: Washout question?
BMatthews, thanks. The plane will be a similar design to the starfire. 52-53" WS, and it will have flaps. I was lucky enough to get a copy of the airfoil used on starfire, so will be using that. Don't know what the airfoil is, name, number, modifyied? What ever it is , it has worked well for a long time. Just going to reduce the root to get tip root. I think 2deg will work out OK.
Posted on: 8/25/2011 10:41 AM by Author "CoolerByTheLake" in the forum "Scratch Building, Aircraft Design, 3D/CAD"
http://www.rcuniverse.com/forum/fb.asp?m=10686793

RE: Washout question?
Thanks, thought that's what its for. Wings will have taper close to this.
Posted on: 8/24/2011 1:52 PM by Author "CoolerByTheLake" in the forum "Scratch Building, Aircraft Design, 3D/CAD"
http://www.rcuniverse.com/forum/fb.asp?m=10685441