tomscub

Hi Group, There has probably been more experience collected on this site than any other in the world, regarding the Rotax 912 ULS, and the Jabiru 3300. These are my engine choices for my current project and I would like a consensus. My thought: The Jab has an extra 20 hp and more torque, but it is not as mature of a product. Also, much less plumbing and a more simple engine. It can happily burn 100LL Single carb Valve trouble as been noted. There have been more than 15,000 912's built and they have a bullet proof lower end. Not sure about the top end. I understand that you can get in trouble up there by simply turning the prop backwards. Also, some gearbox woes. I sure would like to hear from some experienced users. Thanks, in advance Tom

About a year ago, rumors were that there was an RV-9, "down under" that was being fitted with a Jabiru 3300. Can anyone guide me to a site, or offer any updates on the progress of this effort. Thanks, in advance Tom

I happened to see this at Sebring. They have designed, cast, and machined the head. The block is in the works. They hope to have it flying by Sun n Fun this year. Sounds aggressive! It is an inline four banger. It will be common rail and offer it's torque and hp at relatively low RPM, but will have a reduction drive, mostly to cushion the prop from the engine kick. I think that they were talking about compression ratios in the 20/1 area. The foot print will be a match for the 912. I can't wait!! Tom