As I type this I've just written the last piece of animation code.
We have some neat little things in such as true variable pitch prop (as opposed to the default constant speed prop),
a pneumatic fuel gauge, accurate engine startup using pressurized air and a lot more.
We're now in the cleanup and tweaking stage and I'm preparing myself to type the documentation.
It's really a question of just a few weeks now, not month.
O well anyway, any idea of time, this month? fingers crossed.