LaGG-3 Critical Airspeeds

[HeavyCavalrySgt]

The engine has a lot of torque, so the power on speeds are a little tough to determine - the plane gets sensitive to control inputs and the results are inconsistent.

 

Power off:

 

Clean: 156

Full flaps: 120

Full flaps and gear: 147

 

Power on:

 

Clean: extremely inconsistent 101 - 165

Full flaps: 117

Full flaps and gear: 113 (?)

 

Conventional wisdom says approach speed = 1.2 x dirty stall, so call it 180 and I don't believe that will work very well at all.  You seem to need a much higher approach speed, not below 200, to retain control authority and not cause the airplane to stall if you make a control input.