Small update!
It took while, being in the back-burner, but I finally added to the Mission Editor a simple "calculator" for the IUS propellant loads.
This makes the IUS much easier to configure, allowing it to effecting reach a target orbit. Remember that a solid propellant rocket can't be stopped, thus its impulse depends on the propellant it carries.
The 2-stage IUS probably allows for several orbit types to be reached, but I kept things simple and focused on the typical usage cases: circular orbit (usually GEO) or escape trajectory.
Some assumptions are made: (1) instantaneous burns, (2) accurate burn timing and pointing, (3) a certain percentage of the RCS is used at certain segments of the flight (something I still need to properly document). I'd like to improve the 2º point, and provide an angle from the velocity vector to point the vehicle at during a burn with a plane change, but that might have to wait a while.
Other issues: payload mass needs to be input manually, as I can't get the payload mass for dll (= most) vessels (maybe adding the mass should be mandatory for each payload, so it can be used for this and other calculations?), and the input parameters are not saved (for now).
Results: it seems to work properly to target an orbit, but it seems to under-perform in the escape scenarios... I probably messed up somewhere.
At the Vandenberg, the Access Tower should be done, the Launch Mount is almost done, with actual flame tunnels. The MST and SAB will be easier to "massage" as they don't interface with the vehicle, and then there is the source of this all, the PCR, most of which will probably come from the LC39 work.
thank you!
