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| So I've been building an ultralight |
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| danny_galaga:
You just keep.measuring cylinder pressures. If they start to drop off, you could rebuild. But to do a full rebuild is over 20k, which is why flying schools just sell them 'on condition ' at 2000 and buy a new engine. I have thought with the right kind of adaptor, it would make a bitchin replacement for air-cooled VW engines. You'll need a radiator, but they cool so well you could just have the radiator in the engine bay |
| RandyT:
Taking to the air is a costly undertaking. I think I'll stick to flight sims. :) 20k is crazy for engine, but I guess if you were a sledding enthusiast, you could recycle an EOL engine to one of those machines. I'd imagine it would be a drop in replacement for a standard 912 with an extra 20 HP for those who like to go fast. I know a guy who put a similar sled engine on a RZR 800 4x4 and that thing was just stupid. |
| bobbyb13:
I like this concept of repurposing a spent engine. Gives me hope for a power plant for the 550 Spyder project I hope to get to before I'm dust! --- Quote from: danny_galaga on November 19, 2024, 09:11:03 pm ---You just keep.measuring cylinder pressures. If they start to drop off, you could rebuild. But to do a full rebuild is over 20k, which is why flying schools just sell them 'on condition ' at 2000 and buy a new engine. I have thought with the right kind of adaptor, it would make a bitchin replacement for air-cooled VW engines. You'll need a radiator, but they cool so well you could just have the radiator in the engine bay --- End quote --- |
| danny_galaga:
--- Quote from: RandyT on November 20, 2024, 02:17:21 pm ---Taking to the air is a costly undertaking. I think I'll stick to flight sims. :) 20k is crazy for engine, but I guess if you were a sledding enthusiast, you could recycle an EOL engine to one of those machines. I'd imagine it would be a drop in replacement for a standard 912 with an extra 20 HP for those who like to go fast. I know a guy who put a similar sled engine on a RZR 800 4x4 and that thing was just stupid. --- End quote --- Rotax 912 is completely different to things like snowmobile engines. It's much more akin to the air-cooled VW, so MIGHT be useful in a VW project like Bobby's 550 Spyder. It's an honest 100hp. You can get that from VW engines but it'll cost a lot more and be less reliable. The big snag is the reduction gearbox for the propeller. This is the end which you would probably attach the clutch to. But even right now I can't think if it'll be spinning the right way or not without that gearbox. My thought is that if it's spinning the wrong way without the gearbox, which only has two gears in it, you could get 1:1 gears made to replace them. Not ideal, but still probably more reliable and powerful than most air-cooled VW engines |
| RandyT:
Yeah, I don't doubt that there are aircraft specific mods made to them. But when it comes to engine retrofits, as long as it has an output shaft of some nature, it could be made to work on just about anything, one way or another. The air-cooling presents the biggest challenge, which probably makes them more suitable to winter motorsports, where the cold air and a simple cooling fan at idle would probably be enough to keep it from self-immolating. |
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