my new plane from coro and puf

Started by Rajesh14305, April 17, 2014, 08:00:22 PM

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Rajesh14305

Hi this is my first plane with all servos install. Comment please

johnywalker8pm

Job well done Rajesh.. Keep it up.. When yo are planning for the maiden  :thumbsup:

Rajesh14305

Well waiting for the reciever may arrive Saturday .so maiden will be on sunday.malay bhai mote tike binding sikheiba

Swapnil

Good job Rajesh!

Why is the elevator split in two parts? That might lead to problems during flight.
Also, one of your ailerons seems a bit off.

utkarshg13

"If you were born with wings, do every thing you could, for flying."

topalle

I see no problem with the ailerons and don't commercial airliners have split elevator?
Amateur photographer ... DIY enthusiast ... Scratch Builder... Student-Innovator

Swapnil

Well, commercial airliners are not made out of coroplast. Check the the 2nd pic for aileron offset.

v2 eagle

@Topalle,

A single elevator is easier and reliable than a split elevator for a small RC plane. i agree even 100cc YAK, Edge will have split elevator with one servo for each.
The right aileron seems to be a little down when the left is flat. should create a flap effect when trimmed. need to redo the push rods to proper size. Overall the plane looks good and proportional in size.

Ashok.P
FPV with head goggles

http://ashokpkumar.wix.com/mysite

Rajesh14305

Actually I found no way to use single elevator. Btw its nt double I have made a hole at the point you see and then put a rod inside it and connect the two elevator with fevi quick keeping them at same level.so when u move one elevator other moves as if its single elevator

Swapnil

That should work. To make a single elevator all you need to do is place the rudder before and above the elevator hinge.

v2 eagle

Next time move the vertical stab an inch forward inline with the horizontal stab and give a 45deg cut to the rudder to allow movement to the elevator. this is the custom for most planes. joining the elevators with a rod is a good idea but why bother when there is better way. to the best try to make everything in one piece to give extra strength.

Ashok.P
FPV with head goggles

http://ashokpkumar.wix.com/mysite

Rajesh14305

Thanks .btw I hadn't think about the 45degree cut .I will do it today

saikat

Your aileron linkage has got too much offset.

the servo horn and the aileron horn should be connected in a straight line - yours is extreme.
You will face issues while flying .

post a video of your maiden

Rajesh14305

I tried to fly my plane today .But after running 50mtr when it leave ground it just capsizes vertically.any suggestion please

utkarshg13

Disturbed CG... Nose must be heavy
"If you were born with wings, do every thing you could, for flying."

Rajesh14305

Can u tell what should be the ratio of wingspan length and fuselage length

utkarshg13

Usually it is different for different designs and models. For a high winger like yours the chord length should be around 15-25cm, aspect ratio 5-7 and therefore fuselage 65-70% of wingspan. These calculations differ from model to model.
Please post the video of what happened during maiden. It would be helpful to figure out the exact problem.
Also, please mention the specifications of your model including all specs.
The above calculations are for a high winger trainer model as could be seen from pics you've posted earlier.
"If you were born with wings, do every thing you could, for flying."

Rajesh14305

Ok its fuse length is25inch.and its wing length is 36 inch.its span width is 18 cm .im using 1000kv motor with 1000mah battery. And 9 inch prop.

utkarshg13

#18
Seems to be fine. Did your plane flew at all?
Did you tried controlling it with elevator. Sometimes, little elevator has to be applied for take off. Or you could up trim your elevator little bit. Please post the video if possible.
"If you were born with wings, do every thing you could, for flying."

Rajesh14305

No it just reached 2meters. Then capsized every time I tried.

utkarshg13

What is the AUW?
Give a link for the motor and ESC you are using.
"If you were born with wings, do every thing you could, for flying."

Rajesh14305

sanded the tail portion. Ans shortened the fuselage a little bit
Then my plane left tbe ground at a hight 1feet.as I feared to give full throttle. Maiden video soon

Rajesh14305

Quote from: utkarshg13 on April 20, 2014, 06:18:23 PM
What is the AUW?
Give a link for the motor and ESC you are using.
its auw is 380 grams

utkarshg13

"If you were born with wings, do every thing you could, for flying."

Rajesh14305