I had to work all week so my only chance to take in the Reno show was Saturday. I left at 2:30am and was there in time for breakfast - followed the snowplow over the hump. Back home at 10:30pm before the next dump trapped me.just happened to be bad at that point in the rpm vs speed curve for the glider/engine combo.
One of the presentations I managed to see was by two German guys - maybe AS - where they were discussing an overheating problem with the rotary motor that seemed to get much worse at 6000rpm. They said that the problem was with cooling and airflow that
Neither of those guys looked old enough to have played with 2 stroke motorcycles, but that curve looked a lot more like exhaust pipe resonance than a cooling problem. I don't know if a rotary engine worries about back pressure - the exhaust pulse isfamously strong, but it's not a 2 stroke cycle. The ADHD engineer in me is churning on this one - dog with a bone. Did anyone else think that the cooling explanation looked unlikely? If these guys are wrong and just increased the cooling, I'd be worried
On Sunday, March 5, 2023 at 5:22:36 AM UTC-5, Doug Bailey wrote:that just happened to be bad at that point in the rpm vs speed curve for the glider/engine combo.
I had to work all week so my only chance to take in the Reno show was Saturday. I left at 2:30am and was there in time for breakfast - followed the snowplow over the hump. Back home at 10:30pm before the next dump trapped me.
One of the presentations I managed to see was by two German guys - maybe AS - where they were discussing an overheating problem with the rotary motor that seemed to get much worse at 6000rpm. They said that the problem was with cooling and airflow
famously strong, but it's not a 2 stroke cycle. The ADHD engineer in me is churning on this one - dog with a bone. Did anyone else think that the cooling explanation looked unlikely? If these guys are wrong and just increased the cooling, I'd be worriedNeither of those guys looked old enough to have played with 2 stroke motorcycles, but that curve looked a lot more like exhaust pipe resonance than a cooling problem. I don't know if a rotary engine worries about back pressure - the exhaust pulse is
Curious idea,decades ago, I played with 2 stroke exhausts on dirt bikes. Doing some searching prompted by your post, I found a lot, but mostly Mazda rotary Road cars.I've owned an ASH26E with the Wankel rotary engine for 28 years, and exhaust tuning has never come up in any discussions with the factory or other owners. It's a "four stroke" combustion cycle, so perhaps exhaust tuning isn't as useful as it is on two
There is this....https://www.eng-tips.com/viewthread.cfm?qid=264735
Read the posts, especially the link in the first post.
I did a search using"exhaust tuning a rotary engine".
Piqued my interest a bit, but I fly with an electric ASW-24e.
I had to work all week so my only chance to take in the Reno show was Saturday. I left at 2:30am and was there in time for breakfast - followed the snowplow over the hump. Back home at 10:30pm before the next dump trapped me.just happened to be bad at that point in the rpm vs speed curve for the glider/engine combo.
One of the presentations I managed to see was by two German guys - maybe AS - where they were discussing an overheating problem with the rotary motor that seemed to get much worse at 6000rpm. They said that the problem was with cooling and airflow that
Neither of those guys looked old enough to have played with 2 stroke motorcycles, but that curve looked a lot more like exhaust pipe resonance than a cooling problem. I don't know if a rotary engine worries about back pressure - the exhaust pulse isfamously strong, but it's not a 2 stroke cycle. The ADHD engineer in me is churning on this one - dog with a bone. Did anyone else think that the cooling explanation looked unlikely? If these guys are wrong and just increased the cooling, I'd be worried
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