Flaps on take-off and landing

Thomas Borchert wrote in
:

Mxsmanic,

You can come near that number even with a car.


A driver's license for 100k? Yeah, right.


Maybe for F-1 or USAC Indy. :-)

--
Marty Shapiro
Silicon Rallye Inc.

(remove SPAMNOT to email me)

"mike regish" wrote in message
. ..
Even then, you really only want enough speed to keep the tail flying, no?

It's been quite a few years since I flew a J-3, but I seem to remember there
being enough airspeed when the mains first touch down during a wheel landing
for the wing to still be flying...

I suppose you could also count carrier landings, if you want to pick nits.

Unless you have something better you would prefer to do with the nits...
grin

mike regish writes:

I've only heard of the "coffin corner" in reference to helicopter flight.

The U-2 is famous for its coffin corner, and some other aircraft have
one as well.

--
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"Thomas Borchert" wrote in message
...
Mike,

You could probably mount a transducer on the windows, but speakers
designed for the purpose would probably work better.


The point is: How would you get the right interference at the ear
independently of ear location relative to the ANR noise source?

I have read about whole cabin systems, too. I don't remember what kind of
aircraft it was, but it was at least 6 place, I think.

The theory is that you use multiple microphones near the sound conducting
surfaces, and multiple speakers. You knock the sound down as soon as it
enters the cabin.

From the reports I have read, there are "sweet spots" in the cabin, where
the noise canceling is more effective than in other places in the cabin, so
you are right; it is not perfect.
--
Jim in NC

I've read it in reference to helicopter flight. I think it is the period
when you are just starting to gain forward speed and altitude. It's where
you don't have enough of either to autorotate to landing in case of an
engine failure, I think.

mike

"karl gruber" wrote in message
...
I've never heard it about a helicopter......and I'm rated. But I suppose
it could be since everything is weird about helicopter aerodynamics.

"Coffin corner" refers to the narrow band of airspeed between stall and
mach buffet in a jet.

As long as it's is a small confined space it works. I e-mailed Bose a couple
of years ago to see if they'd ever tried it in an industrial setting. They
said it wouldn't work there because of the large area and many point sources
of noise. In small spaces, it works just fine.

mike

"Thomas Borchert" wrote in message
...
Mike,

You could probably mount a transducer on the windows, but speakers
designed for the purpose would probably work better.


The point is: How would you get the right interference at the ear
independently of ear location relative to the ANR noise source?


--
Thomas Borchert (EDDH)

I've read that the U2 (or is it U-2) has a 4 knot speed range at altitude.
Too fast, you get mach buffet-too slow, you stall.

mike

"Mxsmanic" wrote in message
...
mike regish writes:

I've only heard of the "coffin corner" in reference to helicopter flight.

The U-2 is famous for its coffin corner, and some other aircraft have
one as well.

--
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If you are going to compare the costs of flying with the
costs of driving, you have to include ALL the costs of driving.

Well, sort of and no. If you already own the car, and would otherwise rent the plane, then by not driving, you are not saving any ownership costs (which are included in the IRS and Hertz per-mile rates). Those would have to be subtracted out, because the car is still depreciating, you still have to carry car insurance, you still have to garage it, etc. Those costs don't go away if you don't drive - they only go away if you totally get rid of the car.

Jose
--
There are more ways to skin a cat than there are cats.
for Email, make the obvious change in the address.

mike regish writes:

You could probably mount a transducer on the windows, but speakers
designed for the purpose would probably work better.

Yes, transducers are one way to do it. It's technically possible, but
I don't think it's really very practical or useful.

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Thomas Borchert writes:

Actually, if you know how it works, it's obvious it can't be done with
windows.

I do know how it works, and I know that it can be done. It just isn't
very practical. ANR systems for enclosed spaces usually work in some
other way. That's why it was facetious of me to mention it.

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