Need a Quick Explanation.

Bigscrb15

Bigscrb15

Well-Known Member
Ok, on one of the other forums I go onto they are always messing with me about flying. Anytime they find a picture of a wrecked plane or the sorts they post saying it was me that caused it. We go into a discussion about roller coasters and airplanes and how I won't go on a roller coaster but love planes. One guy posted this.

"Lets consider the approximate glide ratio of 15-to-1 for modern jets for a moment....15 feet down for one forward, or in laymans terms, falling like an anvil."

I am sure that is wrong. But what is the correct glide ratio of say a 747. Some technical terms and nice explanation would help to make him sound stupid also, lol.
 
Bigscrb15 said:
Ok, on one of the other forums I go onto they are always messing with me about flying. Anytime they find a picture of a wrecked plane or the sorts they post saying it was me that caused it. We go into a discussion about roller coasters and airplanes and how I won't go on a roller coaster but love planes. One guy posted this.

"Lets consider the approximate glide ratio of 15-to-1 for modern jets for a moment....15 feet down for one forward, or in laymans terms, falling like an anvil."

I am sure that is wrong. But what is the correct glide ratio of say a 747. Some technical terms and nice explanation would help to make him sound stupid also, lol.
Click to expand...

15 is about the right number for a 747, however that means that for every 1 mile of altitude you can glide 15 miles. So lets say you lost all power at 32,000 feet that means you could glide about 75 miles. That may be far enough to land at a nearby airport.
 
Bigscrb15 said:
"Lets consider the approximate glide ratio of 15-to-1 for modern jets for a moment....15 feet down for one forward, or in laymans terms, falling like an anvil."
Click to expand...

Exactly backward.

15/1 glide ratio means that a 747 will travel 15 ft FOWARD for every foot it looses in altitude.

A 727 actually has a 22/1 glide ratio, much better than most light singles.
 
Thank you very much. I thought I was right, but I don't like to post stuff unless I know 100%. I don't even haven my PPL yet, but Im workin at it.
 
The space shuttle is about 1:1, but of course, spends most of it's descent decerlerating.

The 767 'Gimli Glider' managed 12:1
 
No checking wikipedia.
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USMCmech said:
A 727 actually has a 22/1 glide ratio, much better than most light singles.
Click to expand...

That's probably with engines at idle, rather than shut down, don't you think? I think Barry Schiff had written that there was a sigificant difference.
 
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