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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



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