Number for the Twin Otter

[Exaviator]

It's about 35 years since I last flew a Twin Otter but the following figures may be of some help.

T/Off @ Max Weight - MSL - ISA Conditions

Flaps 10 Lift Off @ 70 Kts (1.05vs)

Landing @ MLW - MSL - ISA

Flaps 37 degrees Speed at 50 ft = 84 Kts (1.5 vs)
Speed at Touch Down 64 Kts (1.15vs)

Climb @ Max Weight/Max Climb Power

Below 10,000ft = 92 Kts Above 10,000 ft = 85 Kts

Cruise @ Max Weight @ LRC 5000 ft ASL & ISA

RPM 75% Torque 33 PSI = 125 Kts IAS/140 Kts TAS

Cruise @ Max Weight @ Max Cruise Power 5000 ft ASL & ISA

RPM 75% Torque 50 PSI = 148 IAS/163 TAS

Needless to say there is a who range of power settings and speeds for each configuration depending on weight, altitude and temperature. You will need to consult the aircraft manual.

I flew the aircraft in the high and hot conditions of New Guinea, both in STOL and normal configurations and the frozen conditions found during the Northern Canadian winters. It proved to be an excellent aircraft to operate in both of these demanding environments.

Cheers Exaviator.