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B-36

Old 09-11-2005, 12:26 AM
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Default B-36

im building a b-36 six engine plane wanted to know a few things like what would be the best motors for it and what type of landing gear would be best for it and it has a 112in wing span thanks for any help and suggestions
Old 09-11-2005, 12:41 AM
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Default RE: B-36

With that many engines, you might want to consider going electric. I would think that matching and tuning that many glow engines for every flight session, would be a long and tedious process. You may even be able to recharge lipos in less time

Scott
Old 09-11-2005, 09:59 AM
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Default RE: B-36

A guy in Tulsa ,a member of the Tulsa Glue Dobbers, has built SEVERAL of these. all of them big bird legal, some with smoke. he runs .32's on them if im not mistaken, and boy do they sound COOL! this year at our fly in he had a 5, yes a five engine flameout, fourtnately the pilot hed been eating his wheataies, and he made a great landing after a few tense moments.

His landing gear are fixed, he uses 3/4 wide alum. channel, U turned up, with 4 wheels.

Good luck,wish i could tell you more, contact someone in the Tulsa Glue Dobbers, there bound to point you in the right direction
Old 09-11-2005, 12:10 PM
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Default RE: B-36

thanks for the suggestions. if i was going use electrics what size would be the right size for a plane this big i have some electric motors that i came across but not sure if they are big enough to use all i was told about them is that they turn at 17,000 rpm
Old 09-11-2005, 05:25 PM
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Default RE: B-36

are this plans from the old kyosho controline kit?back in 1970 there were two entered in the nats both weighed close to 20 pounds and used enya 19 engines.with todays advances in radio,engines and finishing techneques you should be able to build lighter as these kits used all plywood formers and ribs.i would use laminated balsa aft of the wing for fuse formers and lite ply in non stressed areas forward as well as out bord of the main gear to save weight.the main gear retract inwards so any gear that can suppoert say 15 to 25 pounds should work.nose gear would also be standard as it retracts rearward..i bulit one of these using fox 25's weighed 19 pounds.back in the 80 at las vegas there was an electric conversion of the kit done i believe back then about 24 cells were used so there was alot of battery weight to contend with.the problem you may have is the trucks on the main gear for the four wheels need to be made thin enough to fit inside the wing root.
Old 09-12-2005, 04:39 PM
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Default RE: B-36

yes they are old kyosho plans and i was going to convert it to rc just trying to figure out if i wanna go eletric or go with gas.this is my first conversion.so any and all the help i can get is welcome.this is my first plane to build this big have flown smaller planes.so i thought i would be silly and try building a larger plane lol.the next silly question is where would i find the canopy and the front nose piece or would those have to be hand made thanks
Old 09-12-2005, 10:53 PM
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Default RE: B-36

Keep us posted as to your progress!

Jerry
Old 09-24-2005, 02:37 PM
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Default RE: B-36

what would be the best push prob blades to use for this plane
Old 09-24-2005, 07:00 PM
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Default RE: B-36

the canopy and nose piece you will have to make your self basicall the nose is just a round half ball shape try a whiffle softball for correct sixe it may be used for the mold canopy is about the same even though the plans show an oblong type cicle the later b-36 used a half ball shaped round canopy whiffle hardball size.props depend on engines but 8-6 3 blades or 9-5 2 blades would be a solid start.
Old 09-24-2005, 10:18 PM
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Default RE: B-36

There was a guy at the 2003 Joe Nall that had TWO B-36's. I don't think they were as big as the one you are building, bt then at the Joe Nall, it's hard to tell! One flight I saw he had lost at least two engines and continued flying, rolling, etc. Impressive!
Good Luck, keep us posted on your progress. It's always been one of my favorites.
Randy
Old 09-26-2005, 09:30 PM
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Default RE: B-36

thanks for the suggestions on building this plane.the only thing i dont know for sure is if the speed 280's i have would be enough to get it off the ground and fly it lol or should i get bigger electrics.
Old 09-26-2005, 09:56 PM
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Default RE: B-36

Darn, all this talk about the B-36 has me wanting to drag out "Strategic Air Command" with Jimmy Stewart!
Still a great movie. (if you like airplanes, of course!
Randy
Old 09-26-2005, 10:05 PM
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Default RE: B-36

i have never seen that movie i hear its a good movie
Old 09-27-2005, 11:02 AM
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Default RE: B-36

i think the one in the 80's used a 540 which was a standard at that time.see how much r.p.m you get with a 9-5 2 blade prop on the 280 you have you will need somewhere near 9,000 rpm.i don't think they will do it.
Old 09-27-2005, 11:13 AM
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Default RE: B-36

actually after doing some re thinking,if you went with the new li-po batteries that are so lighti believe you would have to go brushless motors so they don't burn out.you could cover it with chrome monokote and probably break the 16 pound mark.i fiqured out the wing area once it was close tp 900 sq inches and it is a thick airfoil.some where i wrote down the measurements of the original landing gear included with the kit.when i find them i will post them
Old 09-27-2005, 05:32 PM
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Default RE: B-36

thanks for the info. the specs i have on the motors said that it turns at 17,000 no load rpm's
Old 10-22-2005, 05:12 PM
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Default RE: B-36

ok this may sound stupid to those who know more about building planes then i do. im going to use 6 electric motors for this plane just was wanting to know what size speed controller i would need to operate that many motors
and how many cells would i need for it too.im going to use five servos.
Old 10-22-2005, 06:38 PM
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Default RE: B-36

it would be helpful to know the make and type motor weather 6 volt 7.2 volt 8.4 volt or 9.6 volt?still think brushless motors capable of spinning 8-6 3 blades at 10,000 rpm with li-po batteries are the way to go.i know you gave me no load specs on the motor you were going to use but what is the rpm with a 9-6 2 blade or 8-6 3 blade prop need 10,000 rpm.batteries could be placed above the wing oe/and below,the gun bubbles could be made scoops or left open to allow air to enter and exit to cool the batteries in flight.
Old 10-23-2005, 01:24 AM
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Default RE: B-36

Wrangler,

the choice of electrics is a good one. I'm not an electric guy but the technology is definitely there. A guy in our club has an electric B36 at 80 inch span. A very reliable flying plane. No engine out problems.

I can tell you from my experience that, if you want a forgiving flier, keep the wing loading down to 2 pounds per square foot or less. 1.5 would be wonderful. At your proposed size you have about 10 square feet of wing so aim for 15 to 20 pounds. At that weight and wing loading, .25 size glow motors would fly it fine.

But most of all, " Strategic Air Command" with Jimmy Stewart is required viewing for anyone thinking about the B36 !

Multiflyer
Old 10-27-2005, 07:31 PM
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Default RE: B-36

well the motors i have. after i have researched it some more are about the same as speed 280's im thinking that they might not be big enough to fly this plane.the motors are 6v rs-360rh that turn about 13700 rpm made by mabuchi.does anyone know about these motors.underload the rpm 11210
Old 10-27-2005, 08:23 PM
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Default RE: B-36

hobby lobby used to have a chart of engine sizes with rpm given with certain props.from what i know of electric speed 280 will not fly this bird at the given size.i know a speed 400 with a gear reduction of 3-1 is used in a pica pt-19 kit which i also available in glow for .10-.15 size engines.i would think speed 600 direct drives might be the answer if brushed motors are what you want.i was looking at the new sig catalog and they have brushless motors about equal to a 20 glow engine but they run about 60-80 each.where speed 600 are under 20.00 some places.i am seriously considering the brushless motors cost is about the same as glow engines,might make some inquireis in the electric forum.
Old 10-28-2005, 10:05 PM
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Default RE: B-36

plus with brushless you would need one speed controller for every motor.
Some people have been able to run 2 brushless motors on one speed controller but it isn't 100% reliable.
Old 10-30-2005, 12:07 AM
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Default RE: B-36

Dude, make a small test bed first.
Old 11-13-2005, 06:52 PM
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Default RE: B-36

thanks for all of the help and for the food for thoughts... lol. i finally have the fuse built for it but i came to a snag in the plans.the plans i have do not show parts of the blueprints i need to start the wing. it doesnt show the supports for the wind that you affix to the fuse. i cant seem to find these plans online any more .so if anyone knows where i can find a set of these plans. i would be greatfully thankful.the blueprint numbers for the pieces i need are s1 s2 s3 s4 . i know im prolly being a pain to yall,but i do appriceate the help.
Old 11-14-2005, 12:27 PM
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Default RE: B-36

those are wing spars they were originally bolted to the fuse bulkheads with machine screws and nuts.the whole fuselage and wing center section were one piece with the wing tips removable just outbord of the last nacelle.once the spars are affixed to the formers you then add the ribs.this technigue is a pain.i came up with a removable wingby adding a plywood wingsaddle through the bulkheads in the wing area and the adding bals blocks from the saddles to the saides and sanding them to contour of the bulheads then sheeting the fuse,this leaves the wing saddle area solid so you can get a good hand hold with out crushing the skin..email me as i think i have a scan of all the kit parts i can send you to look at.

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