3 more Qs

1. Like there are crosswind landings, are there crosswind takeoffs too?
If yes, what's the procedure of takeoff?

2. In crosswind landings, it's recommended that one lands on only the
upwind wheel. Since this would almost always tilt the upwind wing
groundward, would there not be an engine strike? I'm especially
thinking of aircraft like the 737 and A320...

3. How to slip an aircraft sideward? I'm visualizing a situation on
final when a draft of air suddenly blows the aircraft a bit off-center
and when it might be a bit late to try and bank the craft to get it
back into proper alignment.

Thanks,

Ramapriya

1) Yes, on a crosswind takeoff you put aileron into the wind and use
rudder to stay aligned with the runway. One instructor had me do an
exercise in which I lifted up on one wheel in a crosswind takeoff and
proceeded a good distance down the runway in that condition.

2) Airliners bank into the wind too, but the degree of bank is much
less, since the crosswind is a smaller percentage of airspeed. I'm sure
engine strikes have happened, but it's not a common problem.

3) In gusty winds, it's often necessary to make sudden corrections of
both the rudder and aileron to stay centered on the runway. Many years
ago I had the wind change from a right to a left crosswind at the
instant of touchdown. Slammed me into the runway on the nosewheel and
right main. Thought for sure I had broken the airplane.
--
Gene Seibel
Confessions of a Pilot - http://pad39a.com/publishing/
Because I fly, I envy no one.

"Gene Seibel" wrote

2) Airliners bank into the wind too, but the degree of bank is much
less, since the crosswind is a smaller percentage of airspeed. I'm sure
engine strikes have happened, but it's not a common problem.

Not really Gene...airliners with wing mounted engines almost
always crab into the crosswind rather than banking. Engine
strikes are a serious problem. In the B-707 that I flew for
17 years, we crabbed and then using the rudder, "kicked-out"
the crab at the last second before touchdown. Boeing said
that if one was not comfortable doing that, just touchdown in
the crab. Of course autoland approaches always use the crab
into the wind method with the autopilot taking out the crab
just before touchdown.

Bob Moore
CFI ATP B-707 B-727

Y'know what Bob, almost the only aircraft I saw in Khartoum that
belonged to the national and private airliners were either 727s
(predominantly) or 707s

I could be wrong but I got the impression that the 707s made more noise
than comparable-sized aircraft...

Cheers,

Ramapriya

Ramapriya wrote:

I could be wrong but I got the impression that the 707s made more noise
than comparable-sized aircraft...

707s are old planes by now. Jet engines have gotten quieter over the years. Any
707 that still has the original engine design is going to be very loud and smoke
a lot on takeoff. Even if the engines have been replaced with newer designs,
they'll be noisier than a 727. They 707 also has four of them versus the 727's
three.

When I was working at Hartsfield in the late 70s, it amused me that I never once
saw a 707 land there, but I could count on seeing several DC-3s every day if I
were working a site that allowed me to see a runway. Ten years or so before
that, every article or column about the 707 called it a classic, with the
implication that they would be flying for decades, but they were gone by that
time and the old Gooney Birds were still trucking passengers.

George Patterson
The desire for safety stands against every great and noble enterprise.

Thanks for the correction. Shouldn't have speculated beyond on my
experience.
--
Gene Seibel
Gene & Sue's Aeroplanes - http://pad39a.com/gene/planes.html
Because I fly, I envy no one.

Bob Moore wrote:

the crab at the last second before touchdown. Boeing said
that if one was not comfortable doing that, just touchdown in
the crab. Of course autoland approaches always use the crab

Sorry for being naive here Bob, but does touching down with the nose
not pointed down the center of the airstrip, which is what I presume
would happen if you touched down in the crab, bust the wheels? I'm
thinking of the stress my ankles would be under if I had to jump down
from somewhere at an angle to my eventual follow-through (unsure
whether or not that's a silly comparison).

Ramapriya

"Ramapriya" wrote
Sorry for being naive here Bob, but does touching down with the nose
not pointed down the center of the airstrip, which is what I presume
would happen if you touched down in the crab, bust the wheels?

Certainly not good for light general aviation aircraft, but the
Boeings seem to take it easily.

Bob

I'm an old B-707 engineer. Seems it was something like 7degrees wing
down and you got the cowl. Land gliders all the time with a slip to
keep from getting a wing tip. Kick out the slip just prior to
touchdown. One time the cross wind was high enough, I just landed
across the runway at an intersection.

Posted Via Usenet.com Premium Usenet Newsgroup Services
----------------------------------------------------------
** SPEED ** RETENTION ** COMPLETION ** ANONYMITY **
----------------------------------------------------------
http://www.usenet.com

Sorry for being naive here Bob, but does touching down with the nose
not pointed down the center of the airstrip, which is what I presume
would happen if you touched down in the crab, bust the wheels?

Certainly not good for light general aviation aircraft, but the
Boeings seem to take it easily.


I recall a 747 Captain telling me of how the aircraft is designed to
withstand something like a crab into a 25 knot cross wind without kicking it
straight - said he did it once, and suspects the passengers in the rear of
the aircraft are still having their necks treated by a chiropractor!

Possibly a point worth noting is that when you "kick an aircraft straight"
you still have a considerable mass heading straight down the runway, and the
aircraft simply has too much enertia to accelerate laterally in the short
time between being "kicked straight" and touchdown. I know that some
disagree, but even in GA I tend to kick it straight at the last moment, but
add "more" opposite aileron to counter the adverse bank and drop the
upstream wing - works for me every time.

In talking with 757 Captains I'm told that the max angle of bank in landing
is something like 5 deg.