I tried long spin in my 7A recently. After 3 or 4 turns at idle RPM slowly drops and approximately at seventh turn engine quits. My impression that spin at idle and lost engine are different. At least delay with recovery is much longer when prop stopped. I tried 4 times with the same result. I wonder why engine quits in a first place. I keep Mogas in one tank and Avgas in other. Both filled less than half for aerobatics. First I thought Mogas is to blame. I switched to Avgas with exactly same outcome. Next idea was that centrifugal force pushes gas out of intake. Once right at the moment when the engine was just about to stop I pushed throttle a little bit forward. I did not expect any reaction but it worked like in straight and level flight. I finished my 10 turns with engine running.
Next I tried to enter spin at 1000 RPM rather than at idle. I liked it. Engine kept 1000 RPM thru entire 10 turns. Recovery is faster and more predictable that at idle. So there are two important questions: why engine quits and is there any danger to enter spin at RPM a bit higher that idle? Engine is injected 360M1B.
Thanks in advance for help.
Sorry for poor English. I am from third world. We don?t waist too much money for stupid and useless things like education))
Here is a link to stopped engine: https://www.youtube.com/watch?v=FIOWtnijlSA
Next I tried to enter spin at 1000 RPM rather than at idle. I liked it. Engine kept 1000 RPM thru entire 10 turns. Recovery is faster and more predictable that at idle. So there are two important questions: why engine quits and is there any danger to enter spin at RPM a bit higher that idle? Engine is injected 360M1B.
Thanks in advance for help.
Sorry for poor English. I am from third world. We don?t waist too much money for stupid and useless things like education))
Here is a link to stopped engine: https://www.youtube.com/watch?v=FIOWtnijlSA