Flaps on take-off and landing

Try it. It is not a long term effect, just a quick change
to get over the short fence or narrow ditch.


"karl gruber" wrote in message
...
| Nope.
|
| As long as you are flying in the green arc, the wing alone
will ALWAYS give
| you better lift.
|
|
| Karl
| "Curator" N185KG
| screw bottom feeders
|
|
| "Jim Macklin" wrote
in message
| news:2njOg.22663$SZ3.21477@dukeread04...
| Flap extension does cause an immediate (manual flaps)
| increase in lift, rotating the aircraft also increases
lift
| but the flaps seem to work better in the case of just
| "jumping" a few feet because they also lower the stall
speed
| giving a slightly greater margin at the same energy
level.
|
|
|

"Jim Macklin" writes:

Try it. It is not a long term effect, just a quick change
to get over the short fence or narrow ditch.

So it's like ground effect, right?

--
Transpose mxsmanic and gmail to reach me by e-mail.

On Fri, 15 Sep 2006 16:49:12 +0200, Mxsmanic
wrote in :

So it's like ground effect, right?

No. It's like increasing the angle of attack on a thicker wing
section which stalls at a lower speed.

Ground effect is completely different:

http://en.wikipedia.org/wiki/Ground_effect
The term Ground effect (or Wing In Ground effect) refers to the
increase in lift experienced by an aircraft as it approaches
within roughly 1/4 of a wingpspan's length of the ground or other
level surface (such as the sea)

http://www.avweb.com/news/airman/185905-1.html

Larry Dighera writes:

No. It's like increasing the angle of attack on a thicker wing
section which stalls at a lower speed.

Ground effect is completely different:

http://en.wikipedia.org/wiki/Ground_effect
The term Ground effect (or Wing In Ground effect) refers to the
increase in lift experienced by an aircraft as it approaches
within roughly 1/4 of a wingpspan's length of the ground or other
level surface (such as the sea)

http://www.avweb.com/news/airman/185905-1.html

But if you are hopping over small obstacles near the runway, you're
probably very close to being within the distance influenced by ground
effect, aren't you?

--
Transpose mxsmanic and gmail to reach me by e-mail.

On Sat, 16 Sep 2006 08:53:53 +0200, Mxsmanic
wrote in :

Larry Dighera writes:

No. It's like increasing the angle of attack on a thicker wing
section which stalls at a lower speed.

Ground effect is completely different:

http://en.wikipedia.org/wiki/Ground_effect
The term Ground effect (or Wing In Ground effect) refers to the
increase in lift experienced by an aircraft as it approaches
within roughly 1/4 of a wingpspan's length of the ground or other
level surface (such as the sea)

http://www.avweb.com/news/airman/185905-1.html

But if you are hopping over small obstacles near the runway, you're
probably very close to being within the distance influenced by ground
effect, aren't you?

That's a reasonable assumption, but I believe you'll find that the
technique described will work at altitude as well, so it's not
dependent on ground effect.