It's been so long ago that I forgot how I corrected a problem of a plane sitting ten feet above the ground when landed (I was working with WW2 planes, then). I'm having a problem with a couple of my WW1 planes -- somehow I need to knock the helium out of them so the wheels at least appear to touch the ground ?!?

That's undoubtedly what I'm looking for, if I can find it, although the planes aren't bouncing or crashing -- just hovering off the ground. Kind of like an airplane with a zeppelin fuselage (there's a concept, though it may seem a bit light-headed).
Thanks for the response. Hope all's well in the land of Cymry.

Hi Dan. I haven't done any of this for a long time but it was the only thing about FS flight dynamics I knew anything about. If I remember correctly, there's two different entries you're concerned with which must match up for it to work properly. That's the 1004 Landing Gear "Position (Main & Center) Above/Below CoG" (in inches) & the 301 Fuselage "CoG Height From Ground". The latter defines the height on the runway when the sim first loads & also in Slew mode. This is what can cause an aircraft to drop & explode when you try to use it in CFS1. I used to set these separately by getting the Gear height correct first then working out the CoG height from that. This can be done by changing the Realism to Invulnerable so it doesn't explode & hitting the Pause key while the sim is loading. Go to Spot View & hit P again to see the difference between the Gear height & CoG height. I hope you can understand what I'm getting at. There's a formula for the CoG height entry which I forget right now but it involves multiplying the main gear height in inches by something like 1500 for props & 1600 for jets. This will give the rough figure but you might have to adjust it by experimenting to get it just right. You might also have to tweak the Fuselage Angle which I've found can be way out & is one of the causes of twitching when the aircraft is sitting on the runway. I think there's a tute on all this posted at FFDS.

PS. 10 feet above the runway seems rather a lot. I don't think I've ever seen an aircraft that far out.

Before I came in & eventually saw your present responses(my own computer is 5mi away & no online connection), I already tried resets to the Center of Gravity (kind of provides it own pun on the situation) and tweaked the angle (this biplane's tailskid was even further above ground than the main gear); there's barely a bounce on the startup now but we're still up in the air. I'll try resetting the Landing Gear again but, this time, relative to the Fuselage settings. I don't know the formula, either, but may figure close by extrapolating from planes that are properly situated if Hagar's "1500" doesn't work. Unfortunately, this takes ample time away from my texturing, but this plane is a major part of my initial campaign. I can check it out in a couple hours or so.
If this doesn't work, perhaps an mdl problem?

I see I should have re-checked this posting before I left since you responded @40min. after I posted; I was downloading someone else's S.E.5a during that time.
However, his air file was off by @40% and produced a falling aircraft (ok, not as bad as mine --  if I'd split my COG entry in half, I would have been really close): his COG was at 61605 & mine was 88000: the final render = 43400; his longitude setting is slightly higher & his angle slightly less, as well, but doesn't seem to make much difference.
With my more than doubled entry, the plane actually sat still in mid-air;
splitting between his & mine (@ 72% high) it gently rocked;
I then started cutting down his COG entry (made some back & forth changes in angle but wound up back with what I'd had) until we sat still on the ground.
Anyway, thanks for the response; maybe this will sometime help someone else.

Well, I got mine sitting and flying but I can't leave well enough alone; those in the download need help (they may have found different source specs than I did).
I had to retrace my steps since the specific info is with my own computer. However, I was in a real hurry in my download & didn't remember that I'd used the "search" nor the actual entry; neither did I realize that it was under 'missions' rather than 'aircraft'. Now I see a number of later WWI acft entries, one of which shows a corrected(?) repaint of one I corrected on my own (simple reversal) since I recognized it from a px I'd seen in researching (same earlier with a Snipe but that was a nearly complete retexture; now I see at least one other entry in later acft entries).
Anyway, the specific download was on 'Missions' pg.12, http://www.simviation.com/files/2cfs/WW1RFC.zip ;
I've checked through these & find other errors as well, which I'm now correcting; the missions can use some help, as well. I'll redo these with added scenery (I just can't accept a barren airfield), redo waypoints (some of these are so close you crash when you 'x'-warp) & combine some other missions for the RFC. I've already more than doubled the last mission file (yes, I work backwards) - barely recognizable from its original.
Now I need to make out a new list of source names & hope everyone included them in their zips; see how easily I can get sidetracked when I started out for an 'Escadrille Lafayette' campaign? By the way, I still need a German LVG for that one: haven't found px or specs.
OK, now that I've provided 10 times the info you ever wanted, thanks much for the input.

    Well guy's I'am interjecting at this point because I have another LANDING GEAR ????

I just tried utilizing a 3rd party plane in a mission i built.
Previously the "player" plane and two others as "unit o" were P51d's the original name of a CFS1 aircraft.  Everything has always been fine with this mission.

Now I put the 3rd party plane in the "unit 0" slot and:
    
    1. the player plane has wheels and t/o's just fine
    2. when i look back for my buddies who are suppose to be with me, they are stuck on the runway with NO
WHEELS!
    3. my question is whats up with that??????

Yes, that is correct they do show up to fight at the next waypoint, thank goodness, otherwise it would be five against one!!

Thanks for the info. I'll just live with it!

Have a great DAY!