RE: Engine Recommendation? Edge 540T
ZDZ 80RV for a WildHare Edge 540T would be nuts and way overpowered. ZDZ 80RV is for a 22-25lb plane and that will give it unlimited vertical no problem.
DA-50 just like the older siblings are a great line of motors
ZDZ 50 is another great running motor
BME 50 with the new BME 55X coming sometime hopefully
Taurus 52cc is supposively the smoothest running gasser made and strong
3W 50
First Place Engines, FPE makes I believe a 40-50cc engine also
Much to choose but DA 50 pretty much tops the list