HC Deb 02 November 1992 vol 213 c52W
Mr. Ainger

To ask the Secretary of State for Defence what is the length of time a search and rescue Sea King takes to travel 40 nautical miles in usual conditions of(a) calm, (b) a 10 knot headwind, (c) a 20 knot headwind, (d) a 30 knot headwind, (e) a 40 knot headwind and (f) a 50 knot headwind.

Mr. Archie Hamilton

Assuming an aircraft air speed of 120 knots, and excluding standby times, the information requested is:

Condition Ground speed knots Time minutes
Calm 120 20.0
10 knot headwind 110 21.8
20 knot headwind 100 24.0
30 knot headwind 90 26.7
40 knot headwind 80 30.0
50 knot headwind 70 34.3