And my own contribution...
Flew many early hang-glider\Trike combinations. and a few other powered hang glider combinations too.
.. The original Hiway Trike used a nominal 10 HP 150cc Valmet two-stroke. They flew well with a still air climb rate for an 11 stone pilot roughly 150 ~ 200 ft/min
We reckoned some of those Valmets gave 10.5 to 12 HP and the static thrust from a 48" or 50" propeller about 100 to 110 lbf.
Cruise speed in those ver early days very dependent on glider above but 25 to 35 mph