If i am trying to build something along the lines of a 25" wingspan 12" length race wing and i have a 30Amp esc and i have a 2207 1700kv motor should i buy another motor? I am hoping to be able to hit 70-100Mph but have a decent flight time, is this possible? I am going to run on a 3s 850 or 1800mah whatever will work better. What shape should i try for the main wing for a high speed FPV wing? What rudder/winglet configuration should i have? I am hoping to be able to keep the same ESC, Battery, and prop but am willing to buy a few things. Thanks!
Where do I start?
Firstly you do require as little wing area as possible but it must be able to support the craft's all up weight and quite a few "G"s as well.
As much as is possible of the electrics and battery should be buried out of the airflow to reduce the drag.
The motor will need to provide a great deal of thrust and so you may need a motor capable of not only high kV but also greater voltage.
To double speed you will need to have 8 times the power/thrust.
A symmetrical wing profile/airfoil will give the least drag for its area or perhaps even a truly reflexed airfoil. Wing thickness can be quite high if the cord is long enough but then you will need some wing tip fences to keep the lift figures adequate.
In order to have a greater wing area, shorter span, and roll stability at high speed a wing sweep angle is recommended though that does bring balance issues if the sweep angle is too great! TO bring the CG forward you could go with either circular wing sweep or even a truncated oval shape.
Finally it should be a tractor design, (motor in the front), with a spinner for best clear air for the prop to develop its maximum thrust!
If you have some draft design I may be able to help you refine it a little!
have fun!