Wing sizing and performance
This spreadsheet is for educational purposes only and may contain errors
Any attempt to use the results for actual design purposes are done at the
F1 Input
AM: 530 kg = 1166 lbs Clmax up:
Vs flap up: 83 km/h = 45 kts Clmax down:
Vs flap down: 72 km/h = 39 kts
F2 Minimum wing area
WAR min = 127.9 sq ft = 11.89 qm
WAR min = 120.6 sq ft = 11.22 qm
F3 Wing span sizing
Flat plate area: 0.37 qm = 3.98 sq ft
WAR: 12.12 qm = 130.29 sq ft
WSP: 9 m= 28.9952 ft est k1 =
WSP lower: 0 m= 0 ft
Wing gap: 0 m= 0 ft
max fus width: 0.61 m= 2.0008 feet e=
F4 Engine and Prop
Max Power: 59.65 kW = 79.931 bhp Max prop RPM:
CHO prop: 0.066
Peak Efficiency 2 Blade Prop Dia. = 58 inches = 1.47 m
Peak Efficiency Pitch = 46 inches = 1.17 m
D prop 1.47 m = 57.87401575 inches RSF =
Est. ETA prop= 0.82 V2 rel 1.15
ETA prop: 0.80
F5 Sea level performance
Vmax = 129 mph = 112 kts = 208
Vy = 76 mph = 66 kts = 123
V L/D max = 71 mph = 61 kts = 114
V min pwr = 54 mph = 47 kts = 86
Vstall, clean = 49.6 mph = 43.1 kts = 79.8
Vstall, flaps = 44.3 mph = 38.5 kts = 71.3
Wing loading= 8.9 lbs/sq ft = 43.67 kg/qm
Power loading = 14.6 lbs/horsepower = 6.62 kg/hp = 8.88
F6 Takeoff and landing performance
Fixed Pitch Prop Constant Speed Prop
T.O. distance = 551 ft = 168 m T.O. distance =
T.O. over 50' = 853 ft = 260 m T.O. over 50' =
Landing distance ground roll = 400 ft = 122 m
Landing over 50' obstacle = 993 ft = 303 m
F7 Power off sink rate
windmilling e: 0.53
min sink speed = 52 knots = 96 km/h
sink rate = 646 ft/min
Hagen Heckel
hp@hagenheckel.de
may contain errors.
ses are done at the user's own risk.
F8 Background calculations
1.42 Cdo 0.031
1.78 Lp = 293.15
Lt = 18.23
Ls = 1.75
lambda = 12.68
ASR wing = 6.45
Lt cnsspd = 15.68
lamda cnsspd= 10.37
Cs 3bl = 1.36
L/Dmax = 11.45
Prop/body int= 1.00
1.00 Propeller advance ratio, J = 0.72
T (fixed pitch)= 281 lbs at .7Vto
Tc (fixed pitch)= 264 lbs at Vto
0.79 T (constant speed)= 395 lbs at .7Vto
Tc (constant speed)= 334 lbs at Vto
R = 49 lbs at .7Vto
3300 Dc = 33 lbs at Vto
Xt fixed pitch= 98 ft
Ht fixed pitch= 10 ft
Xt constant speed= 128 ft
0.03 Ht constant speed= 17 ft
T.O. Speed= 57 mph
km/h Fixed Pitch Propeller Performance
km/h max ROC = 852 fpm
km/h Abs. Ceiling = 17902 feet
km/h Service Ceiling= 15800 feet
km/h Constant Speed Propeller Performance
km/h max ROC = 1079 fpm
Abs. Ceiling = 20107 feet
kg/kW Service Ceiling= 18244 feet
stant Speed Prop
369 ft = 113 m
627 ft = 191 m