J
Jim Thompson
Plus it goes "stale" and gets jelly-like.
...Jim Thompson
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Plus it goes "stale" and gets jelly-like.
...Jim Thompson
J
John Larkin
I think so.
John
K
Keith
THay have to have some sort of APU, above a certain size. Smaller
planes (727/737/MD80 class) are still small enough for the pilot to
moose the controls around. Large aircraft need hydraulic assist so
there has to be some APU for engines-out. I believe some
commercial craft have a JP4 driven emergency power unit in the
tail. Military jets (e.g. F16) often use hydrazine in their APUs.
....nasty stuff though.
S
Spehro Pefhany
I suppose they must test them regularly.
Best regards,
Spehro Pefhany
E
ehsjr
Jim said:
Nowadays someone would sue the construction company
for not making the overpass wide enough. I'm not a
pilot - I don't even play one on TV - but landing a
707 on a highway sounds like some pretty impressive
flying to me.
Ed
J
John Larkin
J
Jim Thompson
Even back then it was 4-lane divided.
...Jim Thompson
J
Joerg
Hello Tim,
Fly, yes, but not at high altitudes. The 767 where one quit was
descending quite a bit when that happened. At first they said it's a
weather related change but looking out the windows most of us said
"yeah, right". The yaw was quite noticeable and minutes later the
captain told us what really happened. Then I understood why they used
that little white lie, several seasoned biz travelers had panic in their
eyes and buried their fingers into the arm rests as if trying to hold on.
Regards, Joerg
Fly, yes, but not at high altitudes. The 767 where one quit was
descending quite a bit when that happened. At first they said it's a
weather related change but looking out the windows most of us said
"yeah, right". The yaw was quite noticeable and minutes later the
captain told us what really happened. Then I understood why they used
that little white lie, several seasoned biz travelers had panic in their
eyes and buried their fingers into the arm rests as if trying to hold on.
Regards, Joerg
R
Rich Grise
The 707 is an amazingly robust airplane - "They don't make them like
they used to" - and the only really hard part about landing a big airplane
like that is getting used to the ground effects when you flare - you think
you're just going to settle to the runway, but suddenly find that you're
floating over it, and going to go off the end, so you have to drive the
plane into the ground, kinda.
Cheers!
Rich
J
John Larkin
R
Rich Grise
Way kewl! Can't do it in a B-52, at least not at 300 feet:
http://www.alexisparkinn.com/photogallery/Videos/B-52 Crash.mpg
It's the fourth one down here, in case that link doesn't work:
http://www.rapp.org/archives/2004/09/aircraft_crash_videos/
Cheers!
Rich
J
John Larkin
Way creepy.
Do you remember PSA? They used to run shuttle flights between LAX and
SFO every hour. You'd go the the airport, go to the waiting area, and
get on the next plane. No tickets, no ID, no security, you just paid
the $15 on board in cash. I did it a bunch when I was consulting for
UCLA.
Anyhow the story I was told, maybe an U.L., was that the pilots were
bored one night flying a 727 from LAX up the coast, so they started
doing rolls for fun. They did four, I think, until a stewardess looked
out the window and saw the world upside down and freaked and turned
them in. The pilots were fired, according to the story.
John
R
Rich Grise
I originally saw the whole video, with commentary, where the pilot was
some kind of loose cannon hot-shot, and had been explicitly forbidden
from trying to do aerobatics in a BUF (Big Ugly Fucker), but he thought,
"Hell, I'm invulnerable!", like most college grads do. In the version of
that video that I saw, you can see two ejection seats leave the airplane
just before it goes in - I think a couple of the guys survived - did you
know that some of the seats in the B-52 actually eject _downward_?
Never been that close to the turf, but I have taken ridiculously
inexpensive commuter flights - one time, from SFO to Oakland, we were
on ascent for about 5 minutes, and descent for another 5, and we were
on the ground. Possiblly surprisingly, it was quicker and cheaper than
a taxicab!
I should go see "Apollo 13", the Ron Howard movie - one time on some
talk show, he was whining that on the Vomit Comet, whoever wasn't in a
particular zero-gee scene would be in the back of the plane playing
Superman, and he was stuck working!
Closest I've ever been to zero-gee was "free-fall", which isn't really;
Air is surprisingly viscous when you're going straight down from 10,000
feet with nothing but you, God, and a rip cord. ;-)
(there I was, at twelve five, with nothing but a silkworm and a sewing
machine....) ;-)
Cheers!
Rich
K
Keith
It was a 1G roll so the gravity vector was always in the same
orientation WRT the aircraft. The aircraft nor anything inside
knew it was upside down...
....unless one looked out the window. ;-)
G
Greg Neff
I experienced zero-gee once on an Air Canada flight on approach to
Philadelphia. It lasted for about three seconds, followed by a
similar period at about two-gees. I remember watching a surprised
flight attendant in the aisle quickly brace herself. I was impressed
that she managed to stay on her feet. After we landed and parked at
the gate, the captain got on the PA and explained that the maneuver
was necessary to avoid another aircraft.
================================
Greg Neff
VP Engineering
*Microsym* Computers Inc.
[email protected]
P
Paul Hovnanian P.E.
Darn! I thought this was going to be another anti Microsoft rant.
J
John Larkin
Prove? I just thought the numbers were interesting. The gate leakage
numbers are cool, too. Who needs a reason?
Gosh.
John
H
Harry Dellamano
This thread shows you why you can't just report a piece of informationJohn Larkin said:
without defending it to the n'th degree. What a PITA. It was interesting to
see who gave you a lot of sh*t and who took it at face value. These people
do not realize that there is a gray zone between Absolute Maximum and
Absolute Failure. You reported Absolute Failure which is needed info.
MOSFETs may not fail if you exceed the AM. I will remember your data point
the next time I smoke a MOSFET and must determine exactly what caused the
failure. In catastrophic situations, many strange things happen and this may
help to solve the puzzle.
I remember and found it very informative, your reporting MOSFET performance
to >200c. Interesting that you did not receive much grief for that report.
It has be helpful to me in diagnosing some catastrophic failures.
I hope that this does not deter you from reporting useful information in
the future. Maybe you should distribute it as "data taken because I could".
Regards,
Harry
T
Terry Given
Harry said:
ditto. interesting.
of course it does make me wonder about the absolute failure dynamic gate
voltage (c.f. DC). I think I can make a hand-wavy argument that it will
be lower, and related to Tr, Tf. Alas, I do not have a 20-80V pulse
generator with adjustable slope, or I'd give it a whiz.
the ESD testing would account for this, as its a charge transfer thing
that happens pretty quickly. Hey, thats how to test it - charge up a
cap, then smack it across the gate with a low Rdson FET. peak current
very high, FET controls it and slope, and any old LV pulse gen will do.
I'll give it a crack this arvo.
Cheers
Terry
J
John Larkin
For a *really* fast hv edge, use a relay.
John
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