I will certainly miss the kick in the back when opening up the Rotax 582 to full revs and launching into the skies - that very quiet 5 blade KIEV prop certainly is great match for a wonderful engine and an amazing 19 year old maiden of the skies.
This one is a 4 cylinder boxer engine. Weighs a lot less than Rotax 80hp and costs about half. They also have a water cooled 80hp Hirth with inline 3 cylinders.
The oval tubing slid right into the build in area provided in the Tanarg frame just behind the fuel tank - all the more reason for a nitrogen fired system