Cylinder Cooling

I have seen many Rotax engine installs but not too many have had the cylinder baffling retained on the engine. I'm not sure why as it seems quite a good thing to have I would assume. Anyway it was on the old engine so I incorporated it onto my installation also.

I had to cut down the original ducting that pointed too far down and make a new air intake. This again was harder than first thought. It turned out okay in the end but again, luckily, the cowling hides the fiberglass work as it sure isn't the prettiest thing around.

Again starting from a duct plug I made from foam. I had about 4 modifications to this in the end and also I could have made it significantly smaller but it's on there now so that's that. I will fly it and see how my temps are but it will probably work okay.

Work in progress

 Filling in the gaps and attaching it to the original with glass.  This is also an earlier picture of the oil cooler duct. I had reshaped it to avoid cowling access issues and also narrowed up the nose to make it a smaller inlet hole and also line up with the centre of the cowl. Essentially the oil pump in the front mirrors the size of the inlet and that's how it is for now.

The final fitted duct with seals attached. Again not pretty but hopefully serviceable. Obviously I can't get the fuel pump off in this configuration so I need to make an access port slide arrangement. This will be easy as now I have a bit of a grasp on fiber glassing.