On Apr 23, 5:01 pm, Mxsmanic wrote:
george writes:
Uh. 30 pound over is burned off in about 30 minutes.

Unfortunately, take-off is over in 30 seconds.

With a modern runway in front of me around 700m long and no
obstructions above 200 feet for a km or so I will be safely off the
ground and established in the climb at 30 seconds.
30 minutes I will be clear of the circuit at my (C172) cruising
altitude and on track for my destination.