Can any one give me a couple data points.  I am not flying yet so I am just looking for an average.

At max range power off glide what is your descent rate at a given weight x?  What is it at x-150 pounds?  What is your best

I really just want to see how much your max range glide distance changes between single and dual flight.

Thanks Mike
L235/13B 85%

Mike,

 

Flying my Lancair 320 equipped with a Hatrzell constant speed prop at approximately 1/2 fuel and 2 souls (about 1720 pounds), holding a best glide speed of about 107 Kts (10836 feet per minute) and with the throttle pulled back to a guessed zero thrust:

 

Prop left in cruise pitch = 1500 - 1600 feet per minute descent for a 7:1 ratio.

 

Prop set to coarse pitch = 450 - 500 feet per minute descent for a 22:1 ratio.

 

I haven't run this experiment at a lighter weight since the prop setting has such a significant effect.  I assume a seized engine would result in a descent rate about half way between the two extremes.