Chris and I are using a pair of Honda Goldwing radiators (1200 cc engine sized radiators). They have their own fans attached, covering about 40-50% of the core area, and the motors appear to be reversible. We are not sure IF we will need them, but we are making the install with room for them to be there.

Dave

I’ve allowed room for an aux cooling fan on the back side of the in-cowl radiator, and had planned on installing that until I found better than expected cooling just from the prop extracting flow from the cowl.  I had not expected to need help with the smaller cooling load of the oil.  I had also expected more ‘coupling’ between oil temp and coolant temp; but it seems there is little; i.e., keeping the coolant temp down does little to keep oil temp down.  It seems I may need to install the fan, and figure some way to help oil cooling on the ground, water spray currently seeming the simplest.  I expect to experiment with water spray in a few days.

BTW; David, I expect you and Chris to join me in making the presentation on the rotary engine for the Velocity symposium next weekend.  You will be there, right? E-mail me at alg3@cox.net.

Al