Tuesday, August 23, 2011

FlightGear gravity for AIBallistic

In my 2.4ish code the AIBallistic code is mixing metric gravity with English units for vertical speed and buoyancy (someone's ready for that NASA job!). The result is that bombs (and other things) don't fall fast enough, and some things, like drag 'chutes, are falling up now. I started to make adaptations in my models, but now believe it's best to keep the models as they are, awaiting a future fix.

Since my code is close-to-but-not-quite 2.4, I'm wondering if anybody else is getting the same results with official 2.4?

UPDATE: The bug is still in the current GIT repository, so it's probably in 2.4 as well.

UPDATE: I'll fix the bug locally and leave the models alone (line 862 of src/AIModels/AIBallistic.cxx). I'll still call them "2.4" compatible. Sorry, but I don't have time to make another category of models to match the buggy code. I'll post the fix details here when I get back from my trip so you can rebuild your FlightGear with it.

Drifting on carrier deck

With FlightGear 2.4 I find that my models drift to the right and rotate to the left slowly. This is with the wind turned off. Is anybody else getting this? Note that my build is not exactly 2.4, but is from GIT within a few days of the 2.4 branching.

UPDATE: I've traced this to the "over-g" system, so I'll be commenting out this system until I can get it working again. The F-4J model has this change and is now updated for FG2.4.

Monday, August 22, 2011

F-84G version 0.1

The Thunderjet, version 0.1 (very alpha) is posted. It flies, and it looks like a Thunderjet, but is otherwise unfinished. The above screenshot from FlightGear shows Scorpio's tail above the F-84's canopy.

Wednesday, August 17, 2011

F-84G project

Beginning of an F-84G project. It'll be a while before I get much farther along, since I have a lot of FG2.4 upgrades to do in the hangar.

Tuesday, August 16, 2011

More updates, B-17F and DavePack

The B-17F had developed some bugs, which are now fixed in the latest version and with the newest DavePack. The bombs should work correctly now. I also changed the way I control contrails in multi-engine airplanes. The single controlling property is still used (.../generic/int[5]), but now it contains a "binary counting" style of operation to represent which engines are running. Eventually I'll convert the two-engined models over to this system. As it stands, the system is limited to four engines.

Monday, August 8, 2011

FG 2.4 updates

DavePack and the A-1H model are now updated for FlightGear 2.4. The Skyraider now has a couple new effects, blue exhaust flames which appear at high manifold pressure and low sun angles, and yellow gun muzzle flames. They are a bit experimental yet.

Wednesday, August 3, 2011


1. The Precious Metal racer is now at version 1.0
2. In a few days I'll be updating everything to FG version 2.4
3. I've been sidetracked with OS problems
4. It'll be a while before I can get back to new project development