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munnst
10-05-2004, 12:58 AM
Hi.
I'm experiencing handling difficulties in most aircraft above about 500knots due to compressability.
Is this the same for real world aircraft and how can I prevent this in a dive?
Dog.

munnst
10-05-2004, 12:58 AM
Hi.
I'm experiencing handling difficulties in most aircraft above about 500knots due to compressability.
Is this the same for real world aircraft and how can I prevent this in a dive?
Dog.

Jasko76
10-05-2004, 01:27 AM
The only way to prevent it is by keeping the speed below critical level.
This was a real life problem on planes like P-38, P-47, Typhoon and Bf 109.

ColoradoBBQ
10-05-2004, 01:30 AM
Don't go over 500 knots. http://forums.ubi.com/images/smilies/16x16_smiley-tongue.gif

Yes, planes did have problems with compressability as they achieved faster speed.

Tully__
10-05-2004, 01:45 AM
Except in a couple of aircraft the problem is mostly NOT compressibility. Some stuff I wrote in another thread:

<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>
Manoeuvring

One of the most common errors of inexperience pilots both in real life and in the game is too much control input. The amount of control input required to get a certain response varies considerably with speed. All aircraft respond poorly at low speed and need a lot of input when not fast, but they are also less stable at low speed so you must apply control carefully and slowly in those conditions.

As your speed increases, the aircraft will respond better and will require less movement of the joystick and rudder controls to perform normal flight manoeuvring. You should still apply the controls gradually until you have the desired response, as sudden movements are still likely to upset the aircraft's balance. Sudden or excessive control input can result in stalls (and in the game, usually spins) at any speed. Stall speed is simply the speed below which you can't maintain level flight without stalling and in any case the actual speed will vary a bit depending on fuel/weapons load and flap settings.

As your speed becomes very fast, you will encounter two other
phenomenon. First, control response will become sluggish as the force of
the wind flowing over the controls becomes greater than the strength of the pilot can counter. The extent of this effect depends a bit on aircraft design, so it's more noticeable in some aircraft than in others. The Bf109 is one that tends to suffer from this. Secondly you get an effect referred to as "compressibility" as you approach the speed of sound. Air travelling over the airframe travels faster in some parts than in others, causing some parts of the airframe to approach the speed of sound a lot earlier than others. This can cause a variety of effects varying from locked up controls to reversing the effect of controls. Most aircraft in this game will begin to fall apart from too much speed before you notice this effect, however the Bi-1 rocket plane will enter an irreversible tendency to nose down over about 800km/h unless you can get it to slow down. If you have enough altitude it will actually do an outside loop before hitting the ground http://forums.ubi.com/groupee_common/emoticons/icon_wink.gif. <HR></BLOCKQUOTE>

Abbuzze
10-05-2004, 02:12 AM
<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR>Originally posted by Jasko76:
The only way to prevent it is by keeping the speed below critical level.
This was a real life problem on planes like P-38, P-47, Typhoon and Bf 109. <HR></BLOCKQUOTE>

100% correct solution! http://forums.ubi.com/groupee_common/emoticons/icon_wink.gif
One small mistake, the 109 had no real compressabilityproblem, it was the elevatorheavyness which made it hard to recover a dive at highspeed. In the 109 you need the trim to revover the dive, but then even at highspeed the nose came up real violent...

F19_Ob
10-05-2004, 02:43 AM
The bf109 in FB experiences some buffeting in the highest divespeeds but thats it. In RL it had a clean dive with no buffeting at all up to breaking point. It was the heavy elevatorforces and the lack of buffeting that made pilots cross the limits of safe speed, wich must have happend quite often...well according to my reading so far.


When I still flew the 109 I used to dive away from p38's that had been able to appear on my 6 somehow.
In the dive I bunted wich caused the p38 pilot to react with a roll to keep me in sights, and by that time its usually to late for it to pull out of the dive.

So the p38 is very different to the 109 in this respect. http://forums.ubi.com/images/smilies/16x16_smiley-wink.gif

F19_Ob
10-05-2004, 02:49 AM
he he abbuzze...u already explained....darn what a slow typer i must be..... http://forums.ubi.com/images/smilies/59.gif