jps42

because i wanted to make a blazing fast wing with fanfold foam

Old Larry

How about a delta wing with a length about twice the wing span and the pusher motor/prop somewhere forward of the trailing edge. The aerodynamic forces are spread over a larger area but the heavy stuff, motor and battery are more centered. Keep the controls separate, that is the horizontal stab behind the prop and the ailerons in their normal place. You will have a design that can scale up or down and work with different motors without screwing up the handling too much.

lmopar69

Sounds like a recipe for a fast, agile delta to me!

Laine.

jps42

thanks i will draw one up soon

sgf323

Or try out RC Power's F117 PDF. It's awesome and very fast!

Old Larry

This is the design idea I've been working with. I should add a note about the vertical stab. put it behind the prop and put as much the same area above and below the fus. I'm going add a skid in front of the prop and make it big enough to throw the plane. To make this design fly slower start adding wing span but don't change the original delta, that is make the added wing span a definite step and make the wing tips squared off or rounded not points. Extend the ailerons but not all the way to the wing tips to protect them in a crash. Also make the nose blunt with something for protection in a crash. This kind of design will also fly well in high winds. This kind of design is a cut and paste deal.

jps42

intresting

DT56

I'd say something along the lines of these deltas.

JetPlaneFlyer

The fastest wing shape assuming you are not approaching the speed of sound is a conventional straight wing. For ultimate straight line speed with no consideration for landing or turning you want a small straight wings using as thin an airfoil that you can.

Deltas and swept wing might 'look fast' but the reality is that at subsonic speeds they have much more drag than straight wings, it's only when you get near the speed of sound that sweep starts to be of any benifit. The more sweep you have then the greater the drag is.

You can see this proved time and time again. Just look at any pylon racer or dynamic soaring speed record holder; all have straight wings.

Steve

nbroers

Some good info on the reasoning behind swept wings:

http://en.wikipedia.org/wiki/Swept_wing

Sky Sharkster

Hello Jps42,
I'd have to agree with Steve, the fastest model airplanes known are (for now) slope gliders, and they all have straight wings and conventional layout. These are 350 mph-400 mph ++.
If you go here; http://www.rcspeeds.com/aircraft.aspx
And click on the photos, you'll see the designs.
Now, turbine-powered models are a somewhat different story. Here's the latest record-setter, 337 mph model;
http://www.jetmodelproducts.com/
Which looks more like a conventional jet aircraft.
For subsonic speeds, straight wings and a conventional layout appear to be as fast or faster than any other model aircraft design.
JMO,
Ron