COX .020 POWERED SPEEDSTER

I use to do swept tipped rounded flying surfaces, looks cool and appears fast just standing still.
Thru many Nano versions my understanding and approach for max speed changed.

Field tested noted improved performance:
Formed true airfoils for all flying surfaces, vertical stab included to obtain premium control and
function for the given surface area goals and to decrease R values.

Fully sculpting the balsa is an absolute must, I start with SIG airfoiled balsa for the wing.
3in and 4in wide planks depending on the engine displacement mod to semi or fully symmetrical.

Matching left and right moderate  tapered leading edges to avoid surface trim corrections.
*** no swept tips as it reduces total leading edge drag and sharp squared off surface tips.
Leave it to gain longer narrow surface spans for improved lift and control - like gliders.

Gradual small surface control deflections to avoid abrupt drag angles from narrow
strip ailerons and elevators. Proper size surface control horns to achieve low drag.

Minimal firewall and air voids within the fuselage designed around the proper sized components / wires.

Example: