Doug Fowler's Modified KR2S Project
Why modify a KR2S? This airplane is made mostly of wood, and I like working with wood. Also, the airframe is stressed to 7 g's plus and minus. Simple tools are all that is required and the project can be built in a single-car garage. The idea is to use an easy to build, strong airframe and modify the aerodynamics to make a docile, easy to fly single seater. Some of the modifications are listed:
- The GA(W)-1 airfoil was selected for it's high-lift, low-drag profile.
- Wingspan is extended to 25 feet, to provide 90 sq. ft. of area.
- The fuselage is narrowed to single-seat size--28 inches.
- Since there is a change in the wing MAC and length, new tail-volume areas are calculated.
- Horizontal stabilizer and elevator are increased in length and chord.
- Vertical stabilizer and rudder are increased in chord.
- Engine is a Continental A-75.
- Empty weight should come in under 650 lb.
- Gross weight is limited to 975 pounds, giving a stall speed around 49 mph.
- Calculations show the maximum airspeed at less than 120 mph.
How do I know that this will work? Done this before! See picture:
Doug's Photo Gallery:-
