WHAT PROP FOR TIGERMOTH

[Nick Funnell]

HI CAN ANYONE GIVE ME AN IDEA OF WHAT PROP SIZE TO USE ON A GREENS MODEL TIGER MOTH ITS 78 INCH SPAN WITH A 50/55 320KV MOTOR AND 80 AMP SPEED CONTROLLER AND A 5000 6S BATTERY 

THANKS IN ADVANCE 

[Shaun Walsh]

18x10 would appear to be a good start

 

Remarks:

Battery Load: 11.54 C Voltage: 21.30 V Rated Voltage: 22.20 V Energy: 111 Wh Total Capacity: 5000 mAh Used Capacity: 4250 mAh min. Flight Time: 4.4 min Mixed Flight Time: 7.9 min Weight: 858 g   30.3 oz

Motor @ Optimum Efficiency Current: 38.09 A Voltage: 21.47 V Revolutions*: 6298 rpm electric Power: 817.9 W mech. Power: 730.4 W Efficiency: 89.3 %

Motor @ Maximum Current: 57.69 A Voltage: 21.10 V Revolutions*: 5993 rpm electric Power: 1217.1 W mech. Power: 1074.1 W Efficiency: 88.3 % est. Temperature: 70 °C   158 °F   Wattmeter readings Current: 57.69 A Voltage: 21.3 V Power: 1228.8 W

Propeller Static Thrust: 5911 g   208.5 oz Revolutions*: 5993 rpm Stall Thrust: - g   - oz avail.Thrust @ 0 km/h: 5911 g avail.Thrust @ 0 mph: 208.5 oz Pitch Speed: 91 km/h   57 mph Tip Speed: 516 km/h   320 mph specific Thrust: 4.86 g/W   0.17 oz/W

Total Drive Drive Weight: 1473 g   52 oz Power-Weight: 256 W/kg   116 W/lb Thrust-Weight: 1.18 : 1 Current @ max: 57.69 A P(in) @ max: 1280.6 W P(out) @ max: 1074.1 W Efficiency @ max: 83.9 % Torque: 1.71 Nm   1.26 lbf.ft Climb Capacity: 2177 m   7142 ft

Airplane All-up Weight: 5000 g   176.4 oz Wing Load: 42.1 g/dm²   13.8 oz/ft² Cubic Wing Load: 3.9   est. Stall Speed: 30 km/h   19 mph est. Speed (level): 80 km/h   50 mph est. Speed (vertical): 17 km/h   11 mph est. rate of climb: 8.2 m/s ( ~60...65° ) 1616 ft/min

Edited November 25, 2023 by Shaun Walsh