To JT, Wino, 411A and others, this is a very interesting topic. I'm concerned as to why some want to REDUCE the rotation rate.. .. .Is it because if you somehow miscalculate MinVr to too low a value, then do the normal rotation rate of 2.5/3 degrees per second to the correct pitch attitude, you will then get a tail scrape? It seems to me that this procedure requires that your MinVr calculation be correct, otherwise a pitch attitude of 15-17 degrees WOULD result in a tail scrape if the aircraft stays on the runway.. .. .Here's an example to illustrate my question.... .. .NTSB Identification: DEN90LA046 . The docket is stored on NTSB microfiche number 40608.. .. .Scheduled 14 CFRPart 121 operation of Air Carrier UNITED AIRLINES. .Accident occurred Tuesday, January 16, 1990 at NEW YORK, NY. .Aircraft:BOEING 757-222, registration: N505UA. .Injuries: 176 Uninjured.. .. .WHILE PREPARING FOR FLT IN A BOEING 757, THE 1ST OFFICER (FO) INADVERTENTLY COMPUTED THE TAKEOFF DATA BY USING THE BOEING 767 DATA. V1, VR & V2 SPEEDS WERE CALCULATED TO BE 115, 118 & 129 KTS. THE CORRECT SPEEDS SHOULD HAVE BEEN 145, 148 & 152 KTS. THE CAPT DID NOT CONFIRM THE V-SPEED COMPUTATION; BOTH PLTS SET THEIR AIRSPEED BUGS AT THE IMPROPER SPEEDS. DURING LIFT-OFF, THE ACFT WAS OVERROTATED & THE LOWER AFT FUSELAGE CONTACTED THE RWY. THE CREW NOTED A 'JOLT,' BUT ELECTED TO CONTINUE TO THEIR DESTN AFTER DISCUSSING THE SITUATION WITH MAINTENANCE PSNL. AFTER LANDING, DAMAGE WAS NOTED TO THE LOWER AFT SKIN, AFT PRESSURE BULKHEAD & ASSOCIATED STRUCTURE. . .. .The National Transportation Safety Board determines the probable cause(s) of this accident as follows. . .. .OVERROTATION OF THE AIRCRAFT DURING TAKEOFF. FACTORS RELATED TO THE ACCIDENT WERE: THE FIRST OFFICER'S IMPROPER USE OF THE FLIGHT MANUAL, WHICH RESULTED IN HIS IMPROPER CALCULATIONS OF THE ROTATION SPEED, AND INADEQUATE SUPERVISION CONCERNING VERIFICATION OF THE TAKEOFF DATA BY THE CAPTAIN.. .. .(Edited to insert the NTSB example). . . . <small>[ 10 March 2002, 03:42: Message edited by: Flight Safety ]</small>