Blue line
I have a H model and airspeed is in knots. My blue line is 90 knots
and that is what I climb at or above. I fly out of a short field 1995
feet long to be exact. I rotate at 80 knots level to 90 knots to clear tree line. After that I climb to altitude at 120 knots to keep engines running cool. I was at 90 knots when instructor pulled front engine to idle. Thats going by my flight manual. Best rate of climb single engine, 90 knots. If you read my posting that is what I did. I left the 1/3 flaps in to give me more lift.
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