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My first RC Plane

Started by arunkumarnk, June 27, 2011, 03:51:46 PM

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arunkumarnk

This is my first plane,actualy i got interest in rc flying 2 months before
i have ordered the parts from hobbyking on 23/6/2011.
http://hk.rc-international.info/swarm/arun
and hobbyking 6ch radio.

i think this motor/prop/lipo combination is a bad choice

now i cant wait to get the items  (:|~

and i already started making the plane with thermocol from a fridge packing

i made this wing.its 470mmX95mm (that is the longest piece i got) i dont know if the size is adequate,the total equipment weight is about 175g

please give me your suggestions.

naatumach

hi
did you not compare the specs of the motor? and also you dont have an esc on that list and servo's for that matter too.
If they have not shipped it yet, you can still stop the process and choose and pay from the credit of the last transaction but you'll hv to pay for the shipping.
Motto: build, fly, and modify.
Prefers working on designs than electronics.
No pre-made plans. Use blueprints, make calculations, build, fly, troubleshoot, fly again.

arunkumarnk

yes i ordered 3x turnigy 9g servo,1x hobbyking 25-30A esc
the motor spec says the recommended prop is 7x6,but it was out of stock so i picked 8x6
i shuld have choose at least 1600mah,but cheap batteries were out of stock

Swapnil

Hi Arun, you should have gone for the suggested prop. You can surely find it in India.
Firstly, for the given power setup, the wing area you've made is too small.
I'll suggest you to read up a bit more about the electronics you've ordered, construction techniques and guidelines and basic aerodynamics. There's loads of info on this forum. Go through everything that seems important.
Good Luck!

Swapnil


naatumach

Yes you really have to follow certain steps to make the a/c
Check out lots of really informative threads
Motto: build, fly, and modify.
Prefers working on designs than electronics.
No pre-made plans. Use blueprints, make calculations, build, fly, troubleshoot, fly again.

arunkumarnk

thanks,the site really helps

see you after getting the parts. :)

arunkumarnk

i received it today.
they charged me rs 940 customs duty  :( the declaired value was only $25

saurab

hi, i just wanto kno dat can we use 2.4 Ghz radio system with any battry, esc n motor combos. If no,can anyone tell me criterias of radio selection.                         
                      thank u !
saurab.

Sumeet

@ saurab

Buddy! the radio's operation doesn't depends upon the ESC/Motor/Battery. Its just the Receiver and the Transmitter(Remote) itself that depend on each other. Read more on this forum to have more information on everything....

Thanks.
<<<<<<<SUMEET>>>>>>>>

saurab


arunkumarnk

today i have connected everything and tested the motor and the electronics and i found that the throttle response is not linear,when i move the throttle stick upward,at a perticular point,the motor jumps to a high rpm then each millimeter of movement speed dramatically increses and then the rate of change of speed decreses.
is there any way to fix this? i am using hobbyking t6 6CH transmitter, i have usb cable and software

Swapnil

Did you program the ESC properly? Which one is it? Can't make out its name from the pic...

arunkumarnk


dinil


Swapnil

Hmm...looks like it has no programming feature for setting max. and min. throttle positions.

Arun, if you go through all the comments on the product page you'll see this comment by 'emer' :
"Have had problem with throttle (starting at half stick position). After fixing this, works great."

Try asking him how he fixed it.
Good Luck!

PankajC

At one time I was having similar problem. This has seemingly gone away after rebinding the Rx. Some ESCs also cannot accept sudden movement of the stick (i.e. going from low to high in one jerk).
Spektrum DX6i | EP Pusher Trainer | EP CUB |

arunkumarnk

so far i made this

Swapnil

Innovative motor mount! But it looks really weak.
How did you fix the servo?
Also, you need to reinforce the whole fuselage and wing.

Most important of all, the proportions you have used are not suitable for the power setup you have!

arunkumarnk

i have added rudder and elevator with packing tape.
reinforced the fuselage with 1mm metal rod and the fuselage is fully covered with tape.
i think it is complete now.

it is raining here for a week, so i am unable to fly this
may be i will fly this tomorrow if the weather is clear

roopeshkrishna

Its a nice effort..and too thankful to the VETERANs all who gave us nice and effective guidance...this is a fertile place of knowledge...thanks once again...and have a nice flight...
Phoenix.........

arunkumarnk

i flew this meny times and it crashed all the time,when give throttle it goes upward and nosedives. i changed the wings to dihedral. today it crashed badly. now i need to start from the beginning... i am disappointed :(

Swapnil

Hey Arun, could you please give some details of your plane like lengths of chord and span, approximate weight etc? That would help beginners like me to understand reasons behind crashes.
Did you calculate the proportions by referring http://adamone.rchomepage.com/design.htm ?

aditya

Quote from: arunkumarnk on July 22, 2011, 01:54:34 PM
i flew this meny times and it crashed all the time,when give throttle it goes upward and nosedives. i changed the wings to dihedral. today it crashed badly. now i need to start from the beginning... i am disappointed :(
where is the c.g. of ur plane?
Mechanical Engineer

arunkumarnk

hi,
i had started building according to that design,but then i incresed the wingspan alone. so it is slightly off the design.

after todays crash. i disassembled everything.and discarded the fuselage. only remaining parts are wing and stabiliser


CG is near the alieron