My MiniMax Eros is fitted with an MZ202 engine, and I thought I'd better do an accurate check on fuel consumption.
I use sight glasses in my cockpit as a gauge, but they're pretty useless. I rely on dipping my tanks before takeoff, with the tail raised on a sawhorse to bring the wingtanks level.
But for this test (the 2nd one I've done with the same result), I filled the starboard wing tank right to the very top - it overflowed actually, which was a bit messy. D'Oh!
I did this immediately before I went flying yesterday morning. It was hot & sunny, with a slight crosswind. Temperature was 27 degrees. Engine time was exactly 60 minutes on the Tiny Tach, though this includes warm up & down times, so say a bit over 50 minutes actual air time.
I did a mix of flying, mostly around 4000' QNH: steep turns; stalls with & without flap; max speed runs (seems to be about 85 mph level); slips at various throttle settings; a couple of touch-and-goes. About half the time was just pootling around at between 65 - 75 mph, about 4500 - 5500 rpm
I topped up the starboard tank once again to overflowing, so fuel used was accurately measured from that needed to fill. Result was almost exactly 8 litres per hour. Not bad for a 2-stroke: the MZ 202 is 625cc and maxes out at 6000 rpm, so it's a relatively big lazy engine in 95:10 terms. And maybe all my drag reduction mods are having some useful effect.
But it does show that 2 strokes aren't all gas guzzlers!
Bruce