"S. Sampson" wrote in message
news:gOAQb.6579$ce2.98@okepread03...

Most waivers are for safety. Probably a B-52 with a good load needs
all the speed it can get on climbout.


But a waiver isn't needed for safety. The regulation permits an aircraft,
civil or military, to be operated at the minimum safe airspeed if the
minimum safe airspeed for any particular operation is greater than the
maximum speed otherwise permitted.


§ 91.117 Aircraft speed.

(a) Unless otherwise authorized by the Administrator, no person may operate
an aircraft below 10,000 feet MSL at an indicated airspeed of more than 250
knots (288 m.p.h.).

(b) Unless otherwise authorized or required by ATC, no person may operate an
aircraft at or below 2,500 feet above the surface within 4 nautical miles of
the primary airport of a Class C or Class D airspace area at an indicated
airspeed of more than 200 knots (230 mph.). This paragraph (b) does not
apply to any operations within a Class B airspace area. Such operations
shall comply with paragraph (a) of this section.

(c) No person may operate an aircraft in the airspace underlying a Class B
airspace area designated for an airport or in a VFR corridor designated
through such a Class B airspace area, at an indicated airspeed of more than
200 knots (230 mph).

(d) If the minimum safe airspeed for any particular operation is greater
than the maximum speed prescribed in this section, the aircraft may be
operated at that minimum speed.