Bertie 737 question

Tina wrote in
:

On Jun 11, 1:13 am, Bertie the Bunyip wrote:
Big John wrote
:



Bertie

I flew four flightin the 737 over Memorial week.

Each landing started from a down wind and long stablized final VFR.

I did not detect any attitude change or thorttle change after
turning final.

I also DID NOT feel or see any flare and impact with ground was
what I would say was hard.

Is this normal in the 737, to set up an attitude and fly into the
ground without flaring?

Nothing broke on any of the landings and we walked awasy from each
so must have been good ladings like they say???

Well, the airpane doesn't pitch so much largely because the slats and
flaps come out together, unlike airplanes with flaps only. If you fly
smoothly power changes should be minimal. We don't really flare in
the same way you would in most. just a quick tug at abou t15 feet to
reduce the rate of descent, but we're not supposed to grease it on
for a few reasons. One, float and wasted runway. two, it gets all the
spoilers and othe squat switch things going as well as the immediate
availability of brakes. three, it breaks the surface tension of any
water if it's a wet runway and four it gets the wheels spinning
straight away. you can scuff tires badly in a greaser..

Bertie

I can understand everything you said about firm landings, except the
tire scuffing comment. It would seem to me landing firm would smoke
the tires since they have to accelerate to the correct speed right
now, where a gentle touch down would let them accelerate more slowly.
A more gentle acceleration means less shear forces on the tire, so I'm
missing something important. Are there any insights you can offer?


Yeah. They're pretty heavy and take a bit to get spinning, so if you
grease it on, you just scuff rubber off of one spot until they start
rotating. It's even worse on a wet runway, where water can slice through
rubber very quickly. Sounds crazy, i know. If you're at an airport where
you can see the tires, it's not uncommon to see parts of tires with oval
wear patches where they've worn through to the first layer of cord.
That's allowed, btw.


Bertie


Bertie