Mention radial engines around The Kneeslider and the first name that comes to mind is Russell Sutton. As many of you already know, he’s the engine builder from down under who built an amazing 9 cylinder radial engine using the cylinders from a Honda XR600. As we noted several years ago, as he was wrapping up that project, he had already started on his next build, an even more amazing 14 cylinder radial, using the cylinders from a Yamaha Warrior XV1700.
We hadn’t heard from Russell for quite some time, which is understandable, because he’s been hard at work. Take a look at these photos. That’s a 14 cylinder radial made up of two rows of 7 cylinders each, and yes, those cylinders are from a Yamaha Warrior motorcycle. I get a big grin on my face just looking at that.
The engine is massive and looks better than I expected. The crankcase could have been 400mm OD but I opted for a 500mm OD so that I had room to overlap the huge cylinders to make the engine a lot more compact just like twin row aero engines and shorten the crankcase length. I think that has paid off as the crankcase does still seem to look proportional.
The master rods will be right on 300mm long for greater torque and there is acres of room in the crankcase for balancing. Front cylinders off the XV twin are used on the front row and XV fans may notice something a little different there, and the rear cylinders on the back row.
The engine displaces 11.7 Liters and it needs to be turbocharged to get any power out of it because of the low 8.3:1 compression and low RPM. I have purchased a three blade whirlwind airboat prop, that will absorb up to 700HP or 50 Hp per cylinder.
Once again, amazing doesn’t quite seem to express what a project like this really is. Those Yamaha cylinders look perfect in this application, it should be a beauty to behold and sound great at the same time. He still has a lot of work ahead of him, but we’ll keep checking in to keep everyone up to date. Really nice work!