Spin, engine quit

[Bryan Cotton]

Did my first spins and rolls today. Fun! My last real acro was in a Pitts a long time ago. I have the training and need to build the confidence up. So I started off with big stalls, steep turns, and then spins.

On my first spin I only went around about a quarter turn and recovered. The engine quit and the prop stopped. I hit the button and it came right back to life. Is this a common occurrence? I had the throttle all the way back on the first one and left some in on the next two.

Video to follow.

[GraemeSmith]

If you negative G'd the carb - sure - the engine might stop.

[Bryan Cotton]

[GraemeSmith]

OK - the opposite - you might have momentarily over riched it on the pull up just before it stopped.

Sorry - not been paying attention - which carb are you running?

[Bryan Cotton]

OK - the opposite - you might have momentarily over riched it on the pull up just before it stopped.

Sorry - not been paying attention - which carb are you running?

Aerocarb. Or I guess we call it an aeroinjector now. I did lean before I started. During my warmup at about 2G I had a stumble which responded well to leaning, so I thought the mixture was ok.

My idle is pretty low. Warmed up and on the ground it ticks over too slowly for my MFD to read RPM and I adjust manually for 900 RPM or so. I do like that setup for landing, as opposed to a 900 RPM static that is much higher on final approach.

[GraemeSmith]

I always lean a bit more than lean when looping or doing hard pulls. The weight of fuel in the tank seems to overpower the needle and the carb over riches.

[Tnhelm]

Also, in addition to spins, I have done aileron rolls, a hesitation roll, hammer head turns, half Cuban eight, loops, and steep lazy eights, all with no engine quilting issues.
Tom Helm
OneX0137

[Arjay]

Bryan.
We had the same problem trying to do acro with the Aerovee with aerocarb. The engine quit and Fred couldn’t get it restarted. Had to do an emergency landing on highway 316. We finally ditched the aerocarb for a Rotec tbi, but have not had the opportunity to try acro with it yet.

Ron
Legacy Sonex tailwheel, Aerovee in Georgia

[Scott Todd]

Is that really the carb's fault? If its getting fuel, it works. Part of the clearing turns before doing acro should also verify the emergency landing site. A highway should usually NOT be considered.

[Bryan Cotton]

Is that really the carb's fault? If its getting fuel, it works. Part of the clearing turns before doing acro should also verify the emergency landing site. A highway should usually NOT be considered.

I had my landing site picked out before that!

It would be interesting to learn why Ron's engine would not restart. Mine restarted no problem. My intention is to leave a little more RPM in for spins. Not much inertia in these little wooden props.