posted 10-05- 04:28 PM               

Ok guys, I'm trying to get the wieght right on the BF109Z cause right now it only thinks it weights as much as one 109.

So I got the proper wieght but I'm not sure how to put it in.

In the openplane doc they say to just put in the empty wieght. and then put in the wieght of the engines if you know.

BUT are you supposed to subtract the weight of the engine from the empty wieght and then add that weight as your airplane weight>? Otherwise you may be doubling up on your engine weight.

So what do I do>? I'm working with the 109f-4 and right now the aircraft weight is 5523lbs.

And the engine is 1325.

If you add those together its 6848, is that the true weight of the aircraft>? Do you subtract off the weights of any parts you really know?

By my book a 109K4 (yes different model i know) weighs 7448 (it neglects to mention if that is empty weight) i guess i could see a model thats a couple generations down the line being heavier.

So anyways my BF109Z is supposed to weigh 13224 pounds. So do I subtract off 2 engines and put whats left as my aircraft weight>?

Thats 10574, hehe its roughly 2 times the wieght I would have thought it would be a tad lighter since it wouldn't have all the insturments and pilot comferts in the 2nd fuse and the missing wing tips that are gone.

posted 10-05- 04:35 PM               

Lets just say I know nothing about weights in OP.

Right now the left FUSE is the center of the plane, everything is attached to it. So thats defined as the 10000 lb part. I'm guessing that could be the problem.

What do you guys think>? But how to I set the other fuse at a decent weight>? Boy Am i confused now.

LOL

posted 10-05- 06:17 PM               

Pretty much works like this, take the ovrall weight of the aircraft unloaded and unfueld, this is your max weight.

Now, if you know the weight of any of the parts you can specify these, meaning, say the engine ways the overall empty weight is 5000lbs and the engine ways 500lbs, then the aircraft weight would be 4500lbs with 500lbs specified on the engine. You can carrry this over to every part you know the actual weight of, you specify the weight of the part in the parts properties and subtract that then from the total weight, it the extreme this will mean that you have exactly correct weight distribution throught you're aircraft leading to a much more accurate FM, and small discrepencies in weight are distributed thought the whole aircraft when you specify the aircraft weight minus the weight of all the parts you have added directly

As for the other things, Argon hit the nail on the head, make sure the inertia boxes are there and in the right places, it could be that they have gotten overlayed in the same position as the original aircraft so you have the weight of 2 aircraft on 1 side.

Hope that helps Spanky

posted 10-06- 05:04 AM               

does the weight get distributed just through the inertia boxes, or through the entire model. The documentation isn't all that clear.

posted 10-06- 12:46 PM               

------------------
-Sv =FC=

WWI in SDOE!

posted 10-06- 01:36 PM               

Seems like what ever I do it won't fly anymore.

I split the total weight except for the engines between the 2 fuses.

And it still goes crazy, It want to roll to the right towards the new fuse.

All the inertia boxes seem good.

posted 10-06- 03:03 PM               

Yep, if you DL the one I uploaded to the simfiles site you can see it like it is right now.

All I did originaly was to add weight to the main fuse (left) that was missing.

THen it went all wacky in flight, SO then I divided it and added it split between the 2 fuses.

Still wacked, The right side was now really heavy.

posted 10-06- 04:04 PM               

Take a look at it and let me know if ya have any more ideas.

I don't think i'm about to export the whole plane and then reimport it to get the view better.

Also Its not that it seems to rotate around the one fuse. It DOES rotate around the one.

what i mean is instead of a roll rolling around the center of the plane it rolls around the center of the original (left) fuse.

posted 10-06- 06:08 PM               

Good point WTG but even if i just double the weight in the Phylbs propertie in the original fuse it acts all wacky.

Download it and try it out and you'll see what i mean.

posted 10-06- 07:33 PM               

Load up the OL file

Select All

move to 0,0,0 ( then juggle it until the centre is where you want it - 0,0,0 isn't necessarily the right point but it's a good start! You really want the centre over the middle of the central wing )

Export OL

Run OLC

That should centre the mesh over it's central point. If it's a little off, you may need to do a little juggling, but it's worth it to get it right. That way, when you line up all your inertia boxes, they will be relative to the correct origin of the plane.

posted 10-07- 11:35 AM               

K i need a bit more instructions then, Cause I don't even know what and OL is.

I use max and I never touch extractor so this is all new to me.

posted 10-07- 03:37 PM               

If you use AC3D to model, the OL is something you need to know about!

If you run hippies OL tools, when you run the SMD ( the replacement for extractor) you get an OL file ( extension .OL) and a bucket load of LOD files. The OL file is the replacement for the ASC file in extractor.

AC3D can import an OL file, and this imports the whole model into AC3D. Every LOD is created in the correct position.

When you export an OL from AC3D, you run SMC ( the replacement for builder) and it generates the .SM file from that and the LODs.

It's actually harder to describe it than do it!

To do this, you need:

1 registered copy of AC3D
1 copy of Hippies AC3D plug ins
1 copy of Hippies OL tools
250g self raising flower
1 large egg...

If you are really stuck, send me the model and i'll do the shifting!