Twin motor anti stress machine

Started by wingmanbunty, March 17, 2017, 10:11:21 PM

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wingmanbunty

Dornier Do 335 inspired modification in antistress machine (that is my rc plane)


Although my airplane looks like high wing trainer but the hole idea inspired by do 335
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wingmanbunty

the Do 335 possessed great potential as a combat aircraft, but never got the chance to prove itself. Delayed by high ranking indecision and Allied bombing raids, it simply ran out of time
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wingmanbunty

Material used :-
1.   Ordinary thermocol sheet  for wing construction
2.   Bamboo spars for fuselage and wing strength
3.   Cycle spoke for elevator
4.   Fibre tape used in cricket bat protection


Electronics  :- thanks rc bazaar for providing all the electronics
1.    Avionics 9 grm servo  Qty =2
2.   Avionics brushless motor M2230 1780 kv
3.    Ford Car electric wiring for extension
4.   Wolf pack 25c 900mah lipo battery 2 cell 7.4 volt  qty =2
5.   Avionic rcb 7 x  radio
6.   One Y connector for connection between two esc
7.   Esc  avionics 20 qty =2
8.   Plastic  counter rotating props 8045 props (thanks vivek ji)
(tractor and pusher motors are arranged counter rotating to reduce torque and a clean flow of air on wings , also i want speed with this 2s setup)


praposed layout plan
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wingmanbunty

working with electronics for the setup
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Bilal

this looks interesting, am assuming that both the props are rotating in the opposite direction (to balance the torque along the roll axis ) , however, are you using some kind of mixing the front and the rear motor??

Something to match their RPMs , or is it even needed?

good luck bro

Cessna - 184
Mr. Moss
Self-Design Glider
550 DIY Quad
Scratch Build TriCopter
VT-Allrounder
Telemaster 400
ZMR 250

wingmanbunty

#5
Yes sir both the propellers are rotating in the opposite direction to counter the torque, i am testing the thrust produced by both  the motors .

I am testing the individual motor thrust ,i do not  have pictures the of individual test of the motor , but i am posting some pictures and video 

https://www.youtube.com/watch?v=aEQl9M_k6UA&feature=youtu.be
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wingmanbunty

using my old aircraft as reference for electronic setup
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wingmanbunty

 Coro sheet cutting parts

each motor is producing 300 grm of thrust and the weight of the airplane is going to be approx 500 grms
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Bilal

cool, what are you doing to match the motor RPMs??

connecting both the motors to the same esc in parallel?
Cessna - 184
Mr. Moss
Self-Design Glider
550 DIY Quad
Scratch Build TriCopter
VT-Allrounder
Telemaster 400
ZMR 250

wingmanbunty

#9
Sir i am using 2 esc
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wingmanbunty

some pictures of sections cutting

the three long cutting surface are supported by bamboo spars and goes from the center hole of the elevator to provide strength .
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wingmanbunty

Cutting of elevator section, use of bicycle spoke band for the elevator control surface
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wingmanbunty

cutting and joining the section of fuselage along with elevator and rudder.
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wingmanbunty

thermocol wings in two section joined by bamboo spars and laminated with transparent packing tape.
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wingmanbunty

electronic setup planning

counter rotating propellers (8045)
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wingmanbunty

installing front and rear motor, rx , servos
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wingmanbunty

complete fuselage with electronics
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rcrcnitesh

Maker | Aeromodeller | Teenager

sanjayrai55

Very interesting Bunty  {:)} {:)}

Awaiting the maiden eagerly  :thumbsup:

wingmanbunty

Thanks nitesh
Thanks sanjay sir
Its always inspiration watching your build log sir , individual motor is producing 300 grms of thrust and airplane all up weight is approx 500 grms , so good power in hand with this 2s setup , very soon i am planning for maiden flight . 


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wingmanbunty

some pictures of hand made wooden hinges and connection with servos , bamboo spars for the good sensitivity of the controls .
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wingmanbunty

design of the decoration
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wingmanbunty

some pictures of the aircraft , the landing gear is temporary fitted just for ground testing it is not final it may seem propeller touching the ground , not enough ground clearance ,
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wingmanbunty

i am planning to make first test flight without landing gears , the nose section also seems little bit too long and the wings are almost
half way , because both side ie front and rear have equal amount of weight (motor , esc )i manage to put both the batteries to the front section of nose as far as i can move ,

i had done some glide test on the airplane , long nose does not seem any issue ,

the purpose of the project is to get some speed with this 2s setup

lets see what happen in maiden flight .
EAT ,SLEEP , FLY

sbajare

Hi,

Good design effort, if this is built for speed. Then why the undercambered wing??
Your wing looks more of a glider type design. For speed models a swept wing or delta wing is most preferred.

Pls see details of this model here
https://en.wikipedia.org/wiki/Dornier_Do_335

regds
Sandeep Bajare
Ph - 9175342600