beermaniac

I've been running Sky100 for a few years now. The engine is very economical, and given the right wing you can get fuel consumption to as low as 3-3.5L/hour. The liquid cooling system is great, and makes overheating issues practically non-existing, and thus makes the engine very reliable. I had one issue with a leaking gasket, but it was an easy fix. The only issue is flying in cold winter conditions, as the engine tends to run too cool and you need to cover the radiator. The best part about this engine is the warm up procedure - the manufacturer recommends running this engine on idle for warm up. Since it has a clutch, you simply start it on a ground without a prop without any danger, leave it for a few minutes while you set up your wing, then put on a prop and go. This makes it much, much safer. Overall, a great little engine for cross country flying. The only update i had was Rotax needle piston bearings to make it even more reliable.

i think that one of the biggest hidden advantages the clutch provides, is the ability to start your engine without a prop. This is a huge advantage for carb tuning, and also allows you to start your engine on the ground and warm it up without a prop for added safety.

I believe that's the case. The full story is available here: http://by24.org/2018/06/03/paratrike_crash_in_belarus/

The full story is that he hoocked in to his trimmers and they broke. He fell from 500 meters or so

Pull them in for landings, release them to gain more speed.

what kind of prop are you using? A mismatching prop could cause this.

I don't see that happening. Single cylinder Sky engine is around 14kg and this one has 2x heads and jugs, 2x pistons, and the crank will have to be heavier than the original. Also all the cooling and exhaust pipes. Also, this engine will take a lot of coolant, which will add a bit of weight as well. A Sky 100 uses 750ml of coolant, so this will need considerably more. I just don't see any way of making this in the reported weight, unless without the cooling liquid and by using really expensive materials, like titanium for exhaust.

Well, from looking at the engine, it's 2 110s cylinders, on a single crank, radiator, carb and exhaust. The Sky 110s is around 25HP, so it can be assumed, that this is would be in the range of 40+HP. 110s is roughly 14kg dry, so this would definitely weigh in access of 23kg dry. Also - yay! First post.