You can get 4-rotor from www.rx7specialties.com out of Calgary
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of kevin lane Sent: Thursday, February 11, 2010 10:47 PM To: Rotary motors in aircraft Subject: [FlyRotary] 4 rotor
pineapple racing has a 4 rotor for sale, cheap. it is a pair of 13b's coupled together, once ran in a sprint car [I believe that's what rob told me.]