I've been made the owner of a seventies NAT winning Sailaire thermal duration winch launch sailplane that should build out around 5.5 lbs (before adding electrical) and with a 12'-6" wing span (1643 sq. in). There are no more winches in the area and no how no way to use a high start for the monster, so I'd like to explore electrifying it.
Could you please give me advice as to motor (gear box if you think req'd), battery etc. to get it to launch at a moderate
speed? Not looking for rocketry here just getting it up.
Will greatly appreciate any help,