Kitfox Model 3

The Kitfox Model 3 featured structural changes that were designed to improve flight characteristics and provide a better platform for more powerful engines like the new 80 HP Rotax 912.  A larger vertical stabilizer and rudder were added, as well as larger, stronger lift struts and spar carry through tubes in the fuselage.  The gross weight was increased to 1050 pounds, but the empty weight only went up by a few pounds.  This was the last Kitfox to use the original airfoil and flight control system introduced on the Model 1.

The Model 3 was the first major attempt to aggressively deal with the yaw control issue.  It should be remembered that we are not talking about yaw instability, but a neutral yaw condition.  In other words, it was desired to have the airplane return to straight flight after pressing a rudder without having to move it back with your feet.  Much of this objective was achieved by increasing the size of the vertical fin.  The flaperon system is identical to the Model 1 and Model 2, with very similar handling characteristics.  Again, the higher gross weight requires one to practice at least average tailwheel skills.

specifications
 
powerplant
propeller
length
height
wing span
wing area
seats
empty weight
useful load
gross weight
fuel capacity
range
Rotax 912 80hp
x
x
67 in
32 ft.
x
2
460 lbs.
590 lbs.
1050 lbs.
x
x

performance

takeoff distance, ground roll
rate of climb
max speed
cruise speed
landing distance, ground roll
service ceiling
x
x
x
85 mph
x
x

limiting and recommended speeds

design manoeuvring speed (Va)
never exceed speed (Vne)
stall, power off (Vsl)
landing approach speed
x
100 mph
30 mph
x

All specifications are based on manufacturer's calculations