I made a video, discussing our AeroMomentum AM15 engine, the firewall forward components, weights, as well as the reasons why we chose it:

Our engine's dyno print out:

The engine came out around 10 pounds heavier than expected, due to a number of changes they have introduced over time. AeroMomentum is currently working on getting rid of the excess weight. The weights I measured:

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Hi Ken,

Partially - it will in any case be one of the propellers AeroMomentum is selling, as their fixed pitch propellers were a part of the package we had ordered.

However, their supplier (LugaProp) has a while ago introduced a constant speed prop. Mark hasn't verified yet whether this prop will be compatible with the AM15. If it is, we might upgrade to this prop if the costs are reasonable.

Btw., for those following this thread: We are supposed to receive the final engine mount within the next two weeks. The cowling is supposed to arrive within the next few months.

Frankly, much later than anticipated but then again our progress was also much slower than expected so that in the end everything will probably arrive just in time. ;-)


Thanks for the well-done information on your build and the AM15 engine.  I am looking forward to more information on your progress.

Do you have the final engine mount an cowling yet?



Yes to the engine mount, we already received it a while ago. I actually shot quite a bit of footage of how to align it and drill the holes through the firewall, but have yet to edit the video.

Hopefully this isn't a stupid question, but I can't seem to find anything online. Does this engine burn 100LL? And if so, does it require different maintenance (oil changes, etc.) intervals like the Rotax and UL does? I know it's an auto engine, so I'm inclined to think it may be an engine that runs more happily on mogas.

AeroMomentum uses a lambda sensor for the fine adjustment of the fuel injection and lambda sensors don't like lead. Mark therefore told me that if the engine is permanently operated with 100LL, one should plan to replace the lambda sensor every 100 hours as preventive maintenance. He did not mention anything else, though. If this is what you want to do, I would recommend to give him a call.

The ECU AeroMomentum is using can also run without a lambda sensor, in return for a little bit of fuel economy. I was wondering if this might be an option for 100LL-only operation!? Again, Mark would be the best person to talk to.

Hi Oliver thank you for sharing! I am building a CH701 and considering an Aeromomentum AM13 upgraded to 112hp which seems less heavy than the AM15 std-117hp; did you consider AM13-112hp? And, why did you prefer the AM15?

Hi Jonathan,

I have to admit that I did not even have a look at the AM13 specs. Actually, I am not even sure if the 112 hp AM13 was already available when we ordered our AM15.



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