I flew the first 32 hrs on the SSSC Koala with a 1200 cc, 40 Hp, VW engine. Paid $40 for a rebuildable engine. I wanted more power than the 40 HP. I was getting about 600 FPM ROC at redline of 3600 on climb. Cruise at about 3150/3200 at 65 mph. With my 230 lbs the little engine was running harder than I liked, so I went to the 1835 cc, 60 HP VW engine. ROC with to 1200+ at 3050 rpm with a cruise of 80 mph at 2650/2700 rpm. A lot easier on the engine. Picture of the 40 HP engine. Also picture of the 1835 cc, 60 HP engine. A few months ago I bought a 1965, 1200 cc, 40 HP engine for $25, and another 1966, 1300 cc, 50 HP engine for $25. The 40 Hp engine had a broken piston and a slightly bent rod on #2. Took it apart and took the parts to a local VW engine parts store and machine shop and had everything checked out and bought all new parts to overhaul it. Everything showed no wear, case, crank, 3 of the rods measured new. Also bought a new rod, and all new parts, bearings, gaskets, etc, and put the case together this week. Don't know what I'll use it on yet, maybe a VW trike or a VW powered pipe buggie for the back logging trails where I live. I built one in the 1970's and ran it on the road for several years, lots of fun, then the state started requiring a safety sticker with fender, windshield, wipers, etc, etc, so that ended that. Now I need to rebuild the heads with all new parts. Pictures of the case of the 1965 , 40 HP engine. There is still a lot of VW engines out there if you look. A 1835cc, 60 HP for the V-Max would be a fun airplane.