I was thinking I'd be happy if I get whatever response with drawings available

. But here are the requirements.
Possibly one cable with the second winch as a mechanism for pulling the cable back. Approx. 200-300 hp engine. We'll be pulling Blaniks to the 300-700m level and the most active usage will be flying the student pilots. So the cable has to be accepted for 1500 m at least. What else? There's no big difference whether to use old truck as a base or to build it as trailer-based mechanism I suppose. The runway is grass.
Regards, Kaido