Coro trainer - electric - build log

Started by santhosh-r, December 23, 2012, 08:57:02 PM

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santhosh-r

Dear friends,
I am a begginer in RC planes.
Now I am building a RC coro trainer and I would like to share the build Photos.
Spektrum DX6i | Phoenix V4 | CoroTrainer | Tamiya Baja king 2WD | RCTimer F450 Quadcopter

arun.sreelakam

santhosh where are you in coimbatore..?
Turnigy i10|Flysky 9xb|Hoverfly quadcopter|Arduflyer apm 2.5 with gps|Pixhawk|Homemade micro night vapour|Homemade ornithopter(in progress)| Reptile Quad with Gopro Brushless gimbal | Naza v2| APM 2.6 with GPS | Micro quad self made | FrSky| v911 Helis | 1200mm Hexacopter with 5d gimbal | 1300mm x8 With Red Gimbal | 1000mm Octo|

santhosh-r

Spektrum DX6i | Phoenix V4 | CoroTrainer | Tamiya Baja king 2WD | RCTimer F450 Quadcopter

santhosh-r

Spektrum DX6i | Phoenix V4 | CoroTrainer | Tamiya Baja king 2WD | RCTimer F450 Quadcopter

anwar

Welcome :)  Looking forward to the pictures !
Hangar : Please see my introduction.
RC India forum and me : About this forum.

arun.sreelakam

38g servos for trainer?  >:( >:(
so whats the wingspan and length?  :headscratch: :headscratch:
Turnigy i10|Flysky 9xb|Hoverfly quadcopter|Arduflyer apm 2.5 with gps|Pixhawk|Homemade micro night vapour|Homemade ornithopter(in progress)| Reptile Quad with Gopro Brushless gimbal | Naza v2| APM 2.6 with GPS | Micro quad self made | FrSky| v911 Helis | 1200mm Hexacopter with 5d gimbal | 1300mm x8 With Red Gimbal | 1000mm Octo|

santhosh-r

Thanks Mr.Anwar

BTW the wingspan is about 52" with 7 degree dihedral.
I chose the standard servos because the motor is 500W and can provide enough thrust.
Spektrum DX6i | Phoenix V4 | CoroTrainer | Tamiya Baja king 2WD | RCTimer F450 Quadcopter

santhosh-r

Spektrum DX6i | Phoenix V4 | CoroTrainer | Tamiya Baja king 2WD | RCTimer F450 Quadcopter

arun.sreelakam

yaar i think these power system will be much heavier for your model.. :headscratch: :headscratch:
what is the AUW you are expecting? ??? ???
Turnigy i10|Flysky 9xb|Hoverfly quadcopter|Arduflyer apm 2.5 with gps|Pixhawk|Homemade micro night vapour|Homemade ornithopter(in progress)| Reptile Quad with Gopro Brushless gimbal | Naza v2| APM 2.6 with GPS | Micro quad self made | FrSky| v911 Helis | 1200mm Hexacopter with 5d gimbal | 1300mm x8 With Red Gimbal | 1000mm Octo|

santhosh-r

Spektrum DX6i | Phoenix V4 | CoroTrainer | Tamiya Baja king 2WD | RCTimer F450 Quadcopter

arun.sreelakam

 :o :o whooo.. thats pretty heavy i think.. my trainer of 50" span weighs 400gms(inc battery).. and your motor has only 1250gms of thrust..
better wait for the seniors to talk about this.. 
this is my trainer
http://www.rcindia.org/electric-planes/home-made-coro-trainer-plane-50'-span/msg117896/#msg117896
Turnigy i10|Flysky 9xb|Hoverfly quadcopter|Arduflyer apm 2.5 with gps|Pixhawk|Homemade micro night vapour|Homemade ornithopter(in progress)| Reptile Quad with Gopro Brushless gimbal | Naza v2| APM 2.6 with GPS | Micro quad self made | FrSky| v911 Helis | 1200mm Hexacopter with 5d gimbal | 1300mm x8 With Red Gimbal | 1000mm Octo|

sanjayrai55

Arun, I am relatively new in Electrics,and please correct me if wrong, but I would think that if e.g. you use a 1250 g thrust with a 1250 g model, it will be capable of climbing vertically. In that case, for normal (read trainer) flying, this motor should be capable of handling say a 2 Kg model? Looking forward to some insights from people more knowledgeable than myself.

santhosh-r

Arun - I think trainers need only 50 - 75 watts/lb i.e. approx 100 - 150 watts/Kg .Please correct me if I am wrong.Also I am building it as per a plan given by my friend from Sharma models and it stated it needs only 300watts motor.
Spektrum DX6i | Phoenix V4 | CoroTrainer | Tamiya Baja king 2WD | RCTimer F450 Quadcopter

arun.sreelakam

@sanjay: actually i bought a aeolian 1700kv(c3530) motor first which can lift about 1.2kg and installed in my trainer that was nose heavy, then i added some tail weight and fled which flies good but as i am a beginner it was really hard to control, and crashed...Then i moved to the less kv and less watt motor which can handle 700gms or so, then i felt the difference that flying it is really easier than my first model.
Here it may fly good, but decreasing the weight will reduce the damage while crashes..
This is in my view please forgive me if i am wrong.. :)
:P :P :P
Turnigy i10|Flysky 9xb|Hoverfly quadcopter|Arduflyer apm 2.5 with gps|Pixhawk|Homemade micro night vapour|Homemade ornithopter(in progress)| Reptile Quad with Gopro Brushless gimbal | Naza v2| APM 2.6 with GPS | Micro quad self made | FrSky| v911 Helis | 1200mm Hexacopter with 5d gimbal | 1300mm x8 With Red Gimbal | 1000mm Octo|

sanjayrai55

Arun, you are correct when you say that heavier model crashes create more damage. Heavier (and larger) models I would feel have their own advantages and disadvantages: easier to see in the air, better handling in wind. I have crashed (quite a few times!) a Spadet Corro model, about 2.6~2.8 Kg, but, unlike Balsa, it bounced :)

As the saying goes, crash enough balsa models, and you'll have a tree growing, but you can't plant plastic (although I have tried many times :D

sanjayrai55

I guess the important thing is AUW should be in proportion to the model size. I am just completing a SPAD with a span of 44", chord 12", length 32". With full Landing Gear and a 3300 mah battery it will weigh 1.3 to 1.4 Kg, or 3 lbs. Let's see how it flies! :headscratch:

Still looking forward to some expert views on thrust vs model weight  :-\

arun.sreelakam

sanjay sir i think i have got more crashing experience  than yours..  :giggle: :giggle:
done about 8-10 crashed till today.. including the one which happend on my birthday..  >:D
the next flying will be this Saturday.. lets see whats gonna to happen.. :)
anyway all the best for your build and waiting to see the pictures..  :thumbsup: :thumbsup: :thumbsup:

Turnigy i10|Flysky 9xb|Hoverfly quadcopter|Arduflyer apm 2.5 with gps|Pixhawk|Homemade micro night vapour|Homemade ornithopter(in progress)| Reptile Quad with Gopro Brushless gimbal | Naza v2| APM 2.6 with GPS | Micro quad self made | FrSky| v911 Helis | 1200mm Hexacopter with 5d gimbal | 1300mm x8 With Red Gimbal | 1000mm Octo|

sanjayrai55

Good luck for Saturday, Arun

Santosh: post photos...:)

santhosh-r

Sanjay sir here are the photos,
Items ordered from hobby king.
Plan on coroplast.
Fuselage cut out.
Elevator and rudder.
Spektrum DX6i | Phoenix V4 | CoroTrainer | Tamiya Baja king 2WD | RCTimer F450 Quadcopter

santhosh-r

Some more photos.
Spektrum DX6i | Phoenix V4 | CoroTrainer | Tamiya Baja king 2WD | RCTimer F450 Quadcopter

santhosh-r

And some more
Art on horizontal stabliser by my friend Sakthi
Spektrum DX6i | Phoenix V4 | CoroTrainer | Tamiya Baja king 2WD | RCTimer F450 Quadcopter

santhosh-r

Pom horns fixed
Control rod made of bicycle spokes and dowel rod.
Spektrum DX6i | Phoenix V4 | CoroTrainer | Tamiya Baja king 2WD | RCTimer F450 Quadcopter

santhosh-r

servos mounted.
Making of wings from 3mm plywood
Spektrum DX6i | Phoenix V4 | CoroTrainer | Tamiya Baja king 2WD | RCTimer F450 Quadcopter

santhosh-r

Model almost finished with landing gear.
Spektrum DX6i | Phoenix V4 | CoroTrainer | Tamiya Baja king 2WD | RCTimer F450 Quadcopter

santhosh-r

My spektrum 6 channel Rx.
Dihedral cut out from 3mm plywood
Spektrum DX6i | Phoenix V4 | CoroTrainer | Tamiya Baja king 2WD | RCTimer F450 Quadcopter