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XyZspineZyX
07-05-2003, 10:25 AM
for "compressibility"? And which effect(s) does it evoke?
I would like to know this since players say it is not performed now.

And another question: Oleg stated that the patch will improve the prop control: what is missing now?

Thank you

XyZspineZyX
07-05-2003, 10:25 AM
for "compressibility"? And which effect(s) does it evoke?
I would like to know this since players say it is not performed now.

And another question: Oleg stated that the patch will improve the prop control: what is missing now?

Thank you

XyZspineZyX
07-05-2003, 02:00 PM
Could you be more specific plz, I can't seem to understand what you want.
thnx


"The show must go on..."

XyZspineZyX
07-05-2003, 02:04 PM
rosaenrico wrote:

- And another question: Oleg stated that the patch
- will improve the prop control: what is missing now?



According to <u>my</u> interpretation of Oleg`s posts, current CEM in FB is about half finished.Regarding the prop pitch - it should be the other way around( 0% is really 100%).

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XyZspineZyX
07-05-2003, 02:47 PM
Von Zero, sometime i read posts saying that a phenomenon called "compressibility" (of the air?), which should be important in real life flying, is not simulated here.
The question is: what is compressibility? Which are the effects?

XyZspineZyX
07-05-2003, 02:58 PM
/i/smilies/16x16_smiley-surprised.gif /i/smilies/16x16_smiley-surprised.gif /i/smilies/16x16_smiley-surprised.gif /i/smilies/16x16_smiley-surprised.gif , that....
Well, I might be wrong I think is a phenomenon that apears in front of the wings at high speeds(when the wings are "pushing" the air). That creats the "sonic wall", because the particles fron the air are moving with the speed of sound, when your aircraft fly faster than that, they cannmot move from the front of the wings before the wings get in a new position.
It's quite hard to explain, but shortly comes like this the air compresses in front of your plane when you fly faster then the air can move.
I thought that only apears at supersonic speeds.
Anyway, I might be wrong, so if anyone is better documented, plz notice me will ya?
Cheers,

"The show must go on..."

XyZspineZyX
07-05-2003, 03:08 PM
A simple answer is that above a certain speed in a dive it becomes impossible to pull out due to compressibility.

The controls will not move because there is too much pressure on them.

The most familiar plane with that problem seems to be the early P38 Lightning and the problem was solved by adding small dive flaps that extended in steep dives to change the air flow over the control surfaces.

No idea about prop control.

Tully__
07-05-2003, 03:21 PM
Enthor wrote:
- A simple answer is that above a certain speed in a
- dive it becomes impossible to pull out due to
- compressibility.
-
- The controls will not move because there is too
- much pressure on them.
-


This is not compressibility problems, it is simply air resistance (though this is a common confusion).

Compressibility occurs as an aircraft approaches the speed of sound. Supersonic airflow creates different pressures to subsonic. As the aircraft approaches the speed of sound, certain parts of the airframe see supersonic airflow before the actual speed exceeds the speed of sound. This upsets the normal pattern of varying air pressure over the flight surfaces and controls that are relied on for keeping the aircraft in normal flight. The Bi-1's habit of nosing down into an outside loop at very high speeds is an example of compressibility modelling. The real aircraft nearly killed (did kill?) a couple of test pilots doing that. Other simptoms can be controls causing the reverse effect to normal, severe vibration, control flutter, control surface stalls and so forth. The exact effects will depend on the shape of the plane.

Most propellor aircraft simply aren't capable of flying fast enough to suffer true compressibility problems even in a power dive from altitude, though all of them are subject to control forces increasing with speed.

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Tully

XyZspineZyX
07-05-2003, 09:42 PM
Thanks very much to all you for the explanation http://ubbxforums.ubi.com/infopop/emoticons/icon_smile.gif

XyZspineZyX
07-05-2003, 09:49 PM
You're welcome.

"The show must go on..."

XyZspineZyX
07-05-2003, 10:55 PM
YEAH, air is supposed to be not compressable under 400 km/h. It is also important if you want to calculate the True airspeed.


Von_Zero wrote:

- Well, I might be wrong I think is a phenomenon that
- apears in front of the wings at high speeds(when the
- wings are "pushing" the air). That creats the "sonic
- wall", because the particles fron the air are moving
- with the speed of sound, when your aircraft fly
- faster than that, they cannmot move from the front
- of the wings before the wings get in a new position.
- It's quite hard to explain, but shortly comes like
- this the air compresses in front of your plane when
- you fly faster then the air can move.
-
- I thought that only apears at supersonic speeds.
-
- Anyway, I might be wrong, so if anyone is better
- documented, plz notice me will ya?
-
- Cheers,
-
-
- "The show must go on..."



1 Judge not, that ye be not judged.
2 For with what judgment ye judge, ye
shall be judged: and with what
measure ye mete, it shall be
measured to you again.

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