View Full Version : Max speed B767 at MSL
evilroy
2nd Jul 2010, 08:02
I've seen figures for a B767 cruise speed at altitude and max speed at altitude, but does anyone have a max (I suppose theoretical) speed for a B767 at sea level?
If not, what considerations come into the calculation of such a figure?
ta!
kijangnim
2nd Jul 2010, 08:19
Greetings
Check speed boats :ok:, hovercraft :ok:, power boat :ok: but an aircraft flying at sea level :hmm:
GlueBall
2nd Jul 2010, 09:09
Above 250kts at sea level, the major concern would be windscreen integrity . . . in case you'd smack into a pelican, or seagull. :eek:
one dot right
2nd Jul 2010, 09:48
After a brief search - B767 vmo 360kts IAS.
After a brief search - B767 vmo 360kts IAS.
Negative...the TCDS says 360KCAS/M.86
one dot right
2nd Jul 2010, 10:36
After the ADC it's the same.
stilton
3rd Jul 2010, 06:37
360 /.86 are good numbers.
As an aside, it was calculated that one of the 767's that hit the WTC was indicating over 400 Knots..
On-MarkBob
5th Jul 2010, 20:53
What he aircraft is capable of, and what it is certified to do are two different things. I believe the FAA have a safety factor of 1.2 and the UK CAA 1.3. Thus early UK registered aircraft were limited to a lower speed. The implications of this was that the aircraft monitoring programs would throw up overspeed warnings even though the aircraft never exceeded the barber's pole. This would piss the pilots off, because they get 'bollocked' for an overspeed because they would rely on the information on the ASI, which was wrong. The problem that although the UKCAA certified to a lower limit the software was never changed, so the Barber's pole would read the FAA standard. Ultimately, with JAA ops. the situation was rectified in as much as the CAA fell into line with the other European states and the Boeing limit was accepted as the limit. Even though, we still had to 're-certify' the aircraft with the CAA and make the changes to the Flight manuals and ops manuals. The moral is that the speed is the barber's pole since this is automatically adjusted to Mach No. at the Mach/airspeed changeover, which in turn is dependant on outside air temperature. The limits in previous answers are Boeing, and are correct.
mustbeaboeing
5th Jul 2010, 22:03
To provide bird strike protection, do not exceed 313 KIAS below 8000 ft.
(Airplane Flight Manual)