Our own specially
designed 17% thick airfoil section has
comparatively low drag and a wide low drag bucket that
is further expanded by a 22.5% chord trailing edge flap.
The basic airfoil has
very docile stall characteristics
in both smooth and rough condition.
Even with engine
nacelle, propeller and a 20%
smaller span WINDEX 1200 C has a soaring performance
equal to or better then a 15-metre Standard Cirrus glider.
Pilot's position in cockpit
Pilot's position in cockpit is comfortable and relaxing.
The König engine
The König SC-430 3-cylinder engine, used in the
WINDEX 1200C is now manufactured in Canada.
With a displacement of 430 cc it gives a take off power of 20 hp at
4200 rpm. Weight of the König engine is 13.8 kg (30.4 lbs). Starting
is electric and it uses gasoline of types 100LL, 80UL and mogas98.
propeller unit for the König engine has been built and
successfully tested to JAR 22 standards.
The pilot control pitch from the cockpit, fine pitch to fully feathered.
The JAR tests include
50 hours running and 500 control movements
with engine running. After that the propeller unit is dismantled, searched
for damage, tolerances checked and finally function checked again.
The unit has come through bench testing without problems.
Some Windex has flown over 300 engine hours without problems.