From the beginning, the rule book for the 190 cu. in. class has had a requirement that the planes be able taxi under their own power. When not racing these planes are flown like any other plane with conventional landing gear.
But, if you were so inclined, there is an escape clause in the Scale Rules that could be used to demonstrate a racing launch, with your ground crew holding on to the tail for dear life...
9.9. Flight Maneuvers/Scale Operations Not in 9.6, 9.7 or 9.8.
A contestant may elect to perform flight maneuvers or scale operations not listed in this document, but only if they are within the capabilities of the aircraft. The contestant should be prepared to convince the judges that the choice was typical of the aircraft. The contestant should submit a written, graphic and/or video description of the maneuver or scale operation to the judges during the registration for approval, and also the preflight meeting.
Maneuver examples not listed might be in flight tail wag (rudder), vertical takeoff, hover and/or backwards flight for a VTO type aircraft, such as a Convair XFY-1 Pogo, tail slide for an acrobatic aircraft, a high speed buzz the field for any aircraft, a forest fire water drop, or wing-wag with ailerons. Scale Operations might be cockpit canopy close-open, braking demonstration before takeoff, drag chute on landing, or carrier model wing folding and unfolding.