So is the spar the place the CG of the plane should be ?

I dont know abt balancing the plane

hi rik, kits/arfs show where to balance yur plane at in instructions. low winged planes are balanced on top of wing and top wing planes are balanced on bottom of wing. they usually say "balance point (CG) is 3 3/4 to 4" from LE (leading edge of wing)at either side of fuse" (example). balancing yur plane is a must!
-Tinman-

No not necessarily. You should follow the direction but 25% of the cord is considered a good start. Others may challenge this and may be correct.

I hope this helps

Things used to be simpler then...

You know i started off with a TT trainer that went thru almost 10 crashes 3 major ones while breaking the firewall or loosening it were almost weekly affair tilll i got my landing right

So anyway to fix the plywood firewall now and again I had to cut off almost an inch to 1.5" from the design length (alas she is no more ... elevator clevis failure !)

but the plane was so damn good it would fly w/o any noticable CG shift !

Well thats that ! Cheers

"the plane was so damn good it would fly w/o any noticable CG shift !"

Makes me wonder just how good it could have been with the report of all those crashes. My Sig Kadet Senior which has never crashed and I learned on it was meticulously pre-flighted and balanced very carefully. Wonder if that is why I did so good?

Happy flying.

Tom

Well i learned on my own w/o an instructor w/o any other people around at all so all those "crashes" were as they say collateral damages in the learning process.

However i give credit to my TT trainer it was superb

rikhye,
How long have you been flying?

Well that's a tough way to learn. Sort of the school of hard knocks. My guess is that your TT trainer is very good if set-up correctly. I fly my Kadet Senior with a TT GP-42. Good economical motor and mild flights. One of my friends says thats good becuase I will learn to fly on the wing rather than the prop. That's more my style anyway. Good Luck rikhye, and make sure you ask us questions. Check your manual for correct CG placement, it is important. Also check for balance on the roll axis.

Happy flying.

Tom

Well i did my solo abt a montha nd a half back and beleive me it was fantastic.(for me!)

I decided this was the day that would land it all by myself as earlier it was done for me by someone else who helped me on 6-7 flights.

Well it was WINDY but i had made up my mind so i take off do couple of circles and ENGINE CUTS off. MAn i thought you are dead ... first thing that came to my mind was point the plane in the wind. Second thing was RUN catch the plane on its approach LOL. Anyway the plane was too far off for this kind of stunt. So I kept my mind andworked the elevator so that it dint hit the ground nose first and it came to a stop on its Landing Gear. I jumped with joy

Well that was my initiation into the SOLO sport after that i did hit the ground a couple of times a little hard but i was confident now .

In a months time I managed rolls and inverted flights but on the last flight the clevis pin of my elevator broke during doing a loop and it kamikazed into the ground from 200 ft.

So i came across this site spad.org and decided my next plane should be a SPAD STANG and hence i need to know how exactly to balance it

http://www.spadtothebone.com/SPAD/Spadstang


Cheers

Sunil

My guess would be right in front of the spar, but I'm going to suggest you email those spad guys and I bet they tell you exactly where it is best. I've been thinking about the Debonair as a taildragger just for something to not worry about and maybe get my electric flying friend a taste of a gas powered plane.

A Spad Stang, now there's a cool idea.

Happy flying,

Tom

Dear Sunil,
I am sure u will do good if U contacted Mr ASHOK BHOLE Aeromodelling Instructor from Air NCC Squadron,he is very helpful,give my reference,say Khalid ally from Melbourne.
However,1/3rd way from leading will never be far from correct.
HAPPY LANDINGS

Hi Khalid,
How do u know Bhole?
Cheers

Read this months RC Modeler there is a great article about balancing a plane