posted 07-06- 05:29 PM               

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Hi all,
two question about FMs:
the first is that I can't stall any plane (except partially the spitI) even if the "prevent stalls" option is unchecked; it looks strange to me because i read some time ago that at least most of you experience very often stalls, what can it depend from?
Second: it seems to me (not precise misuration) that flying with gears down does not affect speed (at least on 109): true or inaccurate observation?
Ciao
Enrico

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posted 07-06- 06:06 PM            

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I can stall every aircraft with planepack 5.3b, and the ones that should have a tendency to spin very often do. Straight out of the box it was pretty much impossible to stall any of the planes.

Gear drag is much to weak if it exists at all. Only the SpitIX models this close to correctly.

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posted 07-06- 07:29 PM               

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I too can stall every plane. Just make sure the skill slider is ALL the way to the right to get the full FM effects.

Why dont we model gear drag with our planes? It wouldnt be too hard it seems. If yall dont know a solution, I have a few up my sleve that Ive experimented with.

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posted 07-06- 09:20 PM               

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It's actually very easy to model the gear drag, but you get some lift and moment with the CYL airfoil that you add.

TS, Why don't we make an airfoil that's nothing but drag? Since it's for the gear, it could just be a constant, right?

The trouble is, there is so much neat stuff that you can do to improve the planes, where the heck do you start?? I LOVE OPENPLANE!!

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posted 07-06- 09:21 PM               

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Enrico, it sounds to me like you are using the stock planes. Check the online standard link at the top of this board.

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posted 07-06- 09:43 PM            

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Pang I definitly would like to work this into the aircraft. I just picked up Theory of Wing Sections and hope to have it read by next week so I can start on some airfoil generation codes.

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posted 07-06- 09:56 PM               

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I experimented with adding extra CYL drag to the wheels on the Yak and it caused some bizarre landing handling, the nose would pitch down too much and you would have to use alot of backstick to stay level. The speed would bleed off much too quickly and rather than flare your landing it would always pancake.

An all drag airfoil would be worth a shot... maybe it would help too if we modelled the drag caused by the recesses in the wings and the gear doors?

TS

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posted 07-07- 05:24 PM               

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Thank you for your reply;
I use plane pack 5.3b, so maybe i have to set properly stick sensitivity.
About gear drug, i am glad to know that some people is working about it.
Cya all
Enrico

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posted 07-08- 01:41 AM               

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Once again, moving the gear drag topic over to Tech Talk. This is really interesting to me.

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Pang 33rd~GS
33rd Strike Group

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posted 07-08- 06:33 AM            

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Pang, right on with the drag airfoil. That'd help a lot. It's possible to do with the CYL, but as TS found out, it's difficult to get reasonable behaviour.

Enrico, the Spit IX models gear drag so-so, and the P47 does it fairly well. Don't know about the others, but I've noticed most aircraft do have a CYL airfoil on their gear to produce drag, only that it's too small to make a noticable difference.
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/Bjorn.

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posted 07-08- 06:44 PM               

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Bjorn is right on the money here. Cyl.sm has a very little amount of drag in the unstalled regime, but the lift and drag don't apply on parts like landing gear.

Look at Tech Talk to see a description of a new airfoil called DRAG.ppf

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posted 07-08- 09:25 PM               

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If the airfoil is angled paralell to the gear strut it should always be stalled.. I wonder what the orientation is with the default planes.

TS

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