TBEE
4000'=6.4 miles of gliding(your numbers)
Channnel = 21 miles (aprox.)
21-(6.4*2)=8.2 miles total out of gliding range.
8.2/2=4.1 miles out of gliding range from mid. channel
120kt/h=2kt/min
.
. .
If your engine turns for 3min. past the mid. channel point you might reach the other side.
[This message has been edited by AC-DC (edited 10 November 2000).]
[This message has been edited by AC-DC (edited 10 November 2000).]