Originally Posted by 757Bob
(Post 11496553)
I’m an old BUFF driver from the ‘70’s. In that time frame we were restricted to airfield with 300 ft. width runways. The crosswind crab system was never contemplated as an aid to turning sharp corners, or taxiway maneuvering, but permitted us to land in 45kt direct crosswinds. The crab setting is precomputed and applied when aligned for takeoff, and removed when slowed to taxi speed after rollout. I had a copilot apply the setting in the wrong direction once. He saw his error, and cranked it all the way the other way while we were rolling. A thrilling low speed rudder dance ensued, similar to the video.
|
Originally Posted by Jhieminga
(Post 11496165)
So what bit of the airframe needs to be on the centreline? Not the flightdeck I guess.... that might be the challenge in landing like this.
On those if you've got it right then as you flare and push the drift off the aircraft yaws and the flightdeck returns to the centreline..I'm guessing for the Buff guys they flare and accept the offset remains on touchdown |
Crosswind take-off…..
|
Originally Posted by wiggy
(Post 11496773)
Apologies if I'm teaching you to suck eggs but to some degree (SWIDT) it's much the same, at least until the actual de-crab, when flying anything long bodied on an approach with the drift on. You fly down the approach with the flightdeck tracking offset to the upwind side of the centreline.
On those if you've got it right then as you flare and push the drift off the aircraft yaws and the flightdeck returns to the centreline..I'm guessing for the Buff guys they flare and accept the offset remains on touchdown As for rotation on a BUFF, the arm between CG and rear wheel set is very much larger than on a regularly geared airliner/military type, requiring a significant downforce from the tail. One more reason for the built-in angle of incidence on the wing as you would never be able to achieve the same rotation with this size tail as on a civil airliner. |
Nice video of how the a B-52 wing incidence works during landing.
|
This helps explains the B-52's remarkable range -- it flies downhill the entire way!
|
Originally Posted by DaveReidUK
(Post 11496415)
|
BUFF takeoff and landing
Originally Posted by West Coast
(Post 11496713)
Were there any issues with compressor stalls on the downwind wing/engines?
With regard to takeoff and landing characteristics, because of the wing incidence angle, the airplane would try to fly off tail end first if you didn’t apply back pressure at VR. As you approached the flare for landing, if you were trimmed for approach speed, you’d run out of up elevator authority trying to flare. Trimming in the flare is required to keep from hitting front trucks first. ‘Getting a nose gear’ results in a dramatic bounce. Trying to salvage it often produces a serious PIO. Go around definitely recommended. |
I flew with a guy off C5 Galaxies. He said the early ones had a crabbing landing gear for cross winds, but after an event when one landed with the wrong way selected, the system was disabled, as the de-crab was no big issue.
|
Originally Posted by dixi188
(Post 11497666)
I flew with a guy off C5 Galaxies. He said the early ones had a crabbing landing gear for cross winds, but after an event when one landed with the wrong way selected, the system was disabled, as the de-crab was no big issue.
|
At C-5 masses you don't need a cross wind gear, it just beats the runway into submission.
|
Originally Posted by DaveReidUK
(Post 11496415)
You posted the picture, care to explain ? |
Simply illustrating how vocabulary changes over time. :O
|
Originally Posted by DaveReidUK
(Post 11498053)
Simply illustrating how vocabulary changes over time. :O
You are ducking the question, do you know what this instrument is for then ?! |
Originally Posted by stilton
(Post 11498469)
You are ducking the question, do you know what this instrument is for then ?!
|
Have a look at 1:18 in the video on this page https://www.gettyimages.nl/detail/vi...tage/816064990
It shows an Autoland sequence on a HS Trident, including the Rad Alt indicator shown above. |
I believe the picture was posted in response to Stillton in #10 and in particular the use of the term “kick-off Drift”, rather than reference to the function of the instrument itself in the Trident blind landing system.
Terminology and the use of words changes over the years. |
Originally Posted by ORAC
(Post 11498864)
I believe the picture was posted in response to Stillton in #10 and in particular the use of the term “kick-off Drift”, rather than reference to the function of the instrument itself in the Trident blind landing system.
Terminology and the use of words changes over the years. |
Originally Posted by DaveReidUK
(Post 11498867)
Yes, sorry I couldn't resist. :O
Terminology has changed, a pilot shouldn’t be told to ‘kick off drift’ any more than he or she should be told to flare by yanking on the yoke |
Surely on a B-52 there is always a yank on the yoke….
|
All times are GMT. The time now is 17:22. |
Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.