I am building one of these and also plan to convert to electric.
I am using a wemotec midi fan 1750kv brushless hacker and 6cell li-po.
Did you duct the model internally? I am going to duct it behind the fan but dont know whether to duct in front and loose the landing gear.
Any suggestions would be appreciated.
My Sabre flies with a Hacker B50 with a kv=2000, so it's a bit hotter than your wind, and I run it on 6S. I have run this setup for four years now and it hums as good as on the first day. Make sure you have plenty of motor cooling
The Midi ias bit big, but comparable to the Kyosho icdf fan it came with. I use a WeMoTec HW-620 which is 85mm diameter. That size fan was determined by measuring the intake area and taking it to be 82% fsa. for the fan.
I have full ducting in front and behind the fan, I have seen edfs fly without ducting and the performance was not so good ... a lot of precious LiPo energy wasted into heat trying to get the model to fly right. Admittedly doing the duct can be quite a bit of work.