As I recall, Captain Claus' aerodyne is quite a state of the art machine and well able to comply with the normal FAR 25 performance standards.
I distinctly remember reading a cartoon where the neatly uniformed check airman seated in the right hand seat (with shotgun resting on his knee) was briefing Capt Claus to the effect that "... and I may fail one of the power units during the takeoff ".