Turbine Engine Question

>>30,000FPM? That would require 300kts straight down. (30,000' = 5 nautical miles). Is that possible without thrust from the engines working to move the aircraft forward? <<

Oh, you can go down pretty fast alright, no matter what the engines are doing.

I don't know if the numbers are accurate, but the C-17 guys I've flown with say the airplane was designed to do this manuver for enty into hot zones with minimum exposure to ground fire.

I figure if anyone on the ground saw this manuver they would think the airplane had already been shot down and leave it alone.

bandit.gif
 
I don't know about a 30,000 FPM descent, but I rode in a C-17 that landed at Quantico. Quantico's runway is only 4,000 ft long. We had a full load with empty tanks and got stoped in 2,000 ft. This was with only two thrust reversers (one was MELed and it's counterpart was disabled). I was sitting right next to the chains holding down our helicopter and watched them stretch as we stoped. Seeing 3 inch chain stretch right next to your leg is a real eyeopener. Since we were siting sideways, everybody pretty much ended up in the next seat. But that was the end of a three week trip to India, so we were all glad to be home.
 
.. it sounded a bit extreme for such a large plane to me too. But I thought it *might* be plausible as an emergency manuever. For example, descent at some angle at which speed brakes aren't enough to slow it.
 
[ QUOTE ]
Mmmmmm - pork chops!!!

[/ QUOTE ]

Ahh yeah!

Sprinkle a little Asian "Five Spice" after a light brushing of sesame oil and broil those puppies. Holy crap, that's some good eatin'!
 
[ QUOTE ]
30,000FPM? That would require 300kts straight down. (30,000' = 5 nautical miles). Is that possible without thrust from the engines working to move the aircraft forward?

[/ QUOTE ]

I was thinking that terminal velocity of a skydiver in a head first dive is only like 220mph (not knots). How does an aircraft with all that drag (even more with thrust reverse) accelerate beyond its terminal velocity without help from the engines? Could the terminal velocity of a big aircraft be that much higher?
 
[ QUOTE ]
Ahh yeah!

Sprinkle a little Asian "Five Spice" after a light brushing of sesame oil and broil those puppies. Holy crap, that's some good eatin'!

[/ QUOTE ]
MMMMMM - M! My wife hooked it UP last night with some pork chops!!! That was some GOOD eatin' right there!!
grin.gif


I'm thinking that I may be stopping by the sto (purposely spelled that way) to pick a couple of slabs o' steak to throw on the grizill tonight! M!
 
R2F, I may sound like Carlton Banks when I talk, but I indeed come from a family where we said "Sto" on a regular basis!
smile.gif


"Fixin' to bag out and go to the STO"
 
[ QUOTE ]
R2F, I may sound like Carlton Banks when I talk, but I indeed come from a family where we said "Sto" on a regular basis!

"Fixin' to bag out and go to the STO"


[/ QUOTE ]
YOu know? I STILL occasionally find myself saying "I'm fixin' to go to ...."
laugh.gif


You can take the boy out of the hills, but you can't take the hills out of the boy..... or..somethinglikethatthere.
grin.gif
 
[ QUOTE ]
YOu know? I STILL occasionally find myself saying "I'm fixin' to go to ...."

[/ QUOTE ]

Is there something wrong with that???
 
NASA has a modified GII that allows reverse to be selected in flight. This gives the aircraft the approx. glide of the STS and is used for astronaut training.
 
[ QUOTE ]
Thanks for all the responses guys, I really appreciate them. Doug, thanks for the pictures, they really helped out. I hope your 757/767 bid goes well
laugh.gif
.

[/ QUOTE ]

Hey Doug, I didnt know you were bidding to get on the 757-767? Well good luck mate, hows it looking?
 
Ohh well mate, no dramas, shell be right.
How does it work when you want to go on another aircraft Doug?
You say you bid for the position. So does that mean they advertised that theres a going FO position on a 75-76, and you can then bid, and person with most time/seniority wins, sort of thing?

Cheers

Aussie
 
You must log in or register to reply here.
Back
Top