VLE vs. Vmo/Mmo when gear down
Thread Starter
Joined: Dec 2007
Posts: 35
Likes: 0
From: North Hemisphere
VLE vs. Vmo/Mmo when gear down
Mini Bus Fcom limits says:
Maximum spd with L/G extended (VLE) = 280kts/M0.67
and then
Flight with Landing Gear Down special operations says:
Vmo/Mmo with landing gear down is 235kts/M0.60
Why and whats the difference?
Maximum spd with L/G extended (VLE) = 280kts/M0.67
and then
Flight with Landing Gear Down special operations says:
Vmo/Mmo with landing gear down is 235kts/M0.60
Why and whats the difference?
Joined: Sep 2002
Posts: 2,188
Likes: 6
From: La Belle Province
I'll take a guess that the VLE statements occur in the normal part of the flight manual and that somewhere else, perhaps close by, is a statement to the effect that cruise is not to be conducted gear down.
While the VMO/MMO statement is from a part of the manual allowing the whole flight gear down?
So it may come down to:
fatigue load assumptions between being at VLE for a few minutes and being at VMO indefinitely
or
bird strike risks (exposure time again)
as two guesses
While the VMO/MMO statement is from a part of the manual allowing the whole flight gear down?
So it may come down to:
fatigue load assumptions between being at VLE for a few minutes and being at VMO indefinitely
or
bird strike risks (exposure time again)
as two guesses
