I have started a new project - Jet Engine for Gavril Barstow. I will upload it to the Mods section when it's done. CURRENT PROGRESS: App 90% LUA 85% JBEAM 90% Sounds 60% Model 35% Textures 10% CURRENT FEATURES: Is working. No bugs. (None found...) Can accelerate the Barstow to over 400 km/h. (Actually quite hard to steer it at that speed.) Jet engine and frame are detachable. (For example after hard impact or messing with node grabber.) Jet engine can break. Jet engine controls can be reassigned. Own app to indicate current jet engine power. Counterweight to make it more stable. Spoiler. (+ adjustable downforce) Fire simulation. Sounds. Particles.
I do my mods only in free time (Mainly weekends) so it can take some time. Model and textures still need much work. I will write here info about the progress.
For added realistic visual effect, I would add a flat metal plate under the exhaust end (of course with a blackedned part near the rocket tip) so it would look like it's for protecting the car from the jet exhaust.
UPDATE! ADDED: Fire simulation. Spoiler (+ adjustable downforce) - Model not done yet. Ability to customize bindings. Ability to enable/disable jet engine. Animated turbine. (Spin speed is relative to thrust.) IMPROVED: JBEAM - more stable, doesn't wiggle now. Some progress with jet engine model.