I have just completed a flight from KILG- KPVD using RC. The flight was ok until on approaching the area of KPVD when without warning I was instructed to descend from 280 to 100 and to be level in 30 miles or less. I descended at 3000 ft per minute, having great difficulty in getting my speed off from mach 8.1 to 250 knts. As you can imagine I didnt quite make it and received the inevitable b......... when receiving the flight critique. Is this a normal instruction or was there something in the flight plan that might be the problem. Also can someone please give me the formula for calculating the descent rate.

it would help to put the last checkpoint, preferably a vor, as close to the arrival airport as possible.mach 8? what were you flying?jd