rvator51
Well Known Member
RV4chick and I flew to Sedona for breakfast this morning. On the way there, I was playing with the leaning mode in the Dynon EMS. I was able to get the engine lean of peak without running rough which I hear is pretty rare on carburated engines. I attribute it to the new10-5217 carb that we installed last year. It runs lots smoother and uses less gas than our previous carb. I had noticed that the rpm will decline when leaning before it gets rough so thought it might run LOP. We were told that the 10-5217 incorporates an atomizer on it that more evenly distributes the gas into the incoming air.
Heres proof.
We were still climbing in this picture. I leveled off at 7500 feet and was able to get the gph down to 58% hp, 6.1 to 6.3 gph at 2350 rpm and 170 mph TAS.
This would give us a range of over 6 hours in our RV-4 (41 gal tanks). We were showing about 22 nautical mpg which is nowhere close to the 30 mpg that I heard Dan Checkaway can get. Will try this at 10k to 12k and see what happens higher. We might be able to get away with one fuel stop on the way to Oshkosh if our bladders can stand it.
We saw David McNeil and his new RV-10 just getting ready to takeoff from Sedona when we landed. His friend Chuck had a big thumbs up for the flying characteristics of the RV.
Heres proof.
We were still climbing in this picture. I leveled off at 7500 feet and was able to get the gph down to 58% hp, 6.1 to 6.3 gph at 2350 rpm and 170 mph TAS.
This would give us a range of over 6 hours in our RV-4 (41 gal tanks). We were showing about 22 nautical mpg which is nowhere close to the 30 mpg that I heard Dan Checkaway can get. Will try this at 10k to 12k and see what happens higher. We might be able to get away with one fuel stop on the way to Oshkosh if our bladders can stand it.
We saw David McNeil and his new RV-10 just getting ready to takeoff from Sedona when we landed. His friend Chuck had a big thumbs up for the flying characteristics of the RV.
