src/FDM/YASim/Launchbar.cpp: Olaf Flebbe: Make sure expressions stay floats.
src/FDM/YASim/Launchbar.cpp: Olaf Flebbe: Use float consts in float code
and in the calculation of the launchbar angle (by Vivian). It also calculates the holdback angle, and sets a Boolean value which can be used to initiate the release of the catapult strop submodel at the appropriate moment (new code by Vivian).