Pentacles

General FreeBASIC programming questions.
caseih
Posts: 1666
Joined: Feb 26, 2007 5:32

Re: Pentacles

Postby caseih » May 03, 2021 23:40

albert wrote:So in your wing , you would have your main beam , with pistons built into it.

Yes if you can make it light enough. Any weight in the wings is weight that cannot be carried by the aircraft for passengers or cargo.
Might come in handy in the event of a power failure , they can set the wings to the max height and leading edge camber to glide in for a slow landing...
No more deaths in a plane crash..

The glide ratio on a 767 configured for optimal glide is an impressive 20:1. By comparison your average sport gliders are 30:1. It's all about tradeoffs. You can't get any aircraft to stand still in the air, so even with a wing with lots of lift, there are physical limits to how slow a big airplane can travel without falling out of the sky. 100 mph in a crash is still a lot of kinectic energy. And there's *no way* a large body aircraft could fly slower than 100 mph regardless of how thick the wing is. Remember that a wing with more camber does have more lift, but it also has a lot more drag. At some point those cancel each other out and the plane falls out of the sky.

Gliders can fly slow because they are light-weight and have incredibly wide wingspans and very thin airfoils. Lots of factors. It's neat stuff. But here too, there are actual scientific principles at play here and I wish you were interested in them.
Last edited by caseih on May 04, 2021 2:52, edited 1 time in total.
jj2007
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Location: Roma, Italia
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Re: Pentacles

Postby jj2007 » May 03, 2021 23:53

caseih wrote:The glide ratio on a 767 configured for optimal glide is an impressive 20:1. By comparison your average sport gliders are 30:1
Once upon a time (and I have flown such gliders, many years ago). Today's gliders have a lift-to-drag ratio of over 40 in the 15 meter class, and about 60 in the open class. The Eta's ratio of 70:1 is probably the maximum reachable today.
caseih
Posts: 1666
Joined: Feb 26, 2007 5:32

Re: Pentacles

Postby caseih » May 04, 2021 2:53

Pretty impressive, especially when you add in thermals and other kinds of soaring. Neat stuff.
Richard
Posts: 3084
Joined: Jan 15, 2007 20:44
Location: Australia

Re: Pentacles

Postby Richard » May 04, 2021 8:29

albert wrote:They calculate the stall speed , as to how fast you need to go to lift off with an empty plane , with full fuel tanks . and a single 200 pound pilot..
I don't believe you. “They” must be a bunch of idiots.

@albert. It may come as a bit of a surprise, but aircraft have been flying for over 100 years. The art of wing design is well developed and has become a mature science. While birds have evolved variable geometry wings, thickness remains remarkably constant during flight. All the airfoil changes required can be achieved by changing the angle of attack, and the extension of feathers or flaps on the trailing edge. Your delusion that you as a novice without any understanding of higher mathematics might actually advance the field of aerodynamics is quite incredible.

Why are you discussing your fantasy in this thread ?
What has it got to do in any way with FreeBASIC ?

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