Model |
Hirth F23 |
No. Cylinders |
2 (horizontally opposed) |
Displacement |
521 cc |
Horsepower |
50 hp |
Recommended TBO |
1000 hrs |
Propeller |
66 in x 30 in |
Length |
18 ft 1 in |
Height. |
8 ft 10 in |
Wingspan |
28 ft 0 in |
Wing area |
156 sq ft |
Wing loading |
3.36 lb/sq ft |
Power loading |
10.5 lb/hp |
Seats |
1 |
Minimum flight crew |
1 |
Empty weight |
250 lbs |
Useful load |
275 lbs |
Payload w/full fuel |
245 lbs |
Max takeoff weight |
525 lbs |
Fuel Capacity |
5 gal |
Takeoff distance, ground roll |
40 ft |
Takeoff distance, 50 ft obstacle |
150 ft |
Rate of climb |
900 ft/min |
Max level speed, sea level |
54 mph |
Landing distance, 50 ft obstacle |
200 ft |
Landing distance, ground roll |
60 ft |
Glide Ratio |
5.5:1 |
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CRUISE PERFORMANCE CHART & FUEL FLOW: |
@ 55% power 4125 rpm |
1.8 gph |
44 mph |
@ 65% power 4575 rpm |
2.0 gph |
47 mph |
@ 75% power 5025 rpm |
2.5 gph |
50 mph |
@ 100% power 6150 rpm |
4.3 gph |
54 mph |
LIMITING AND RECOMMENDED SPEEDS |
Vx (Best angle of climb) |
33 mph |
Vy (Best rate of climb) |
36 mph |
Va (Design maneuvering) |
48 mph |
Vne (Never exceed) |
65 mph |
Vs (stall, power off) |
24 mph |
Landing approach speed |
31 mph |
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