Hi all
Ive got a Phoenix models Scanner. which i unfortunatley crashed a few weeks ago. lucky for me the fuszz was not damaged but the wings were totally shatered (it spiraled streight down into the ground, here there just happened to be a branch which hit both sides of the and and the fuzz when't sreight trough the space in the middle with just the alluminium nose cone below the soil. lucky and weired hey?).
anyways my friend gave me the wing from his Seagull Models Cee-bee (i think thats how its spelt ). now im working on fitting the Cee-bee wing to the Scanner. i have to cut away part of the wing for it to fit. any ideas on how it will fly?

i am not modifiying the wing saddle in any sort of way. just the wing.
the only things im changing on the scanner:

*3D size elevators and rudder
*custom fiberglass or carbon fiber cowling
*elevator and rudder servos mounted in tail
* tail dragger undercarrage
* side mounted engine (Super Tigre G51 Ring)

I am planning to change the alerons on the Cee-bee wing, im gonna make them bigger (3D size)

anybody got any ideas how far the main spar should be from the CG. got any tips? please comment. how do you think it will fly?
thanks
kyle

Sounds to be a fairly major mod. The result won't fly like either model, so you will need to start with reduced throws on everything for a start. As to where the spar will be in relation to the CG that won't change much from where it has always been. CG position is a function of the wing MAC with a few other variables thrown in but for most models it is in the 25~33% MAC range so no matter where you put the wing, the cg will always be in the same place on the wing (unless you intend to put the wing behind the stabiliser or some other unorthodox position), and therefore in the same relationship to the spar.
Evan, WB #12.

thanks for the quick reply.
i ve never owned a cee bee. my friend gave me the wing. so i wouldnt know where the cg position in relation to the main spar. but thanks alot for the help.
so do you think it will fly well?

When you cobble together two very different parts like a wing and fuselage, it helps to check where the new CG should be placed. The formulas that have served the airiplane design world for ages do that and do it easily. Just make some measurements and plug them into this simple application:
http://www.geistware.com/rcmodeling/cg_super_calc.htm

You can do the measurements with a yardstick. Easy to do. Only 9 measurements.

Then plug in 20% for the "Desired Static Margin" and click the button. You can then read out where the CG would be for the forward location. Plug in 15% and click and you find out where it probably will fly best. Plug in 10% and you've got how far back the CG can be to give you very effective elevator control.

This application works great for situations like yours. Works good for all the rest.

thanks i definitley will try it when i get back home. Im in America, Florida, orlando on holiday now!!!!! its great