Engine out data points

[Chucker]

Been dying to ask these questions since the beginning....

Does anyone have data points for an engine failure? The questions I have are:

1. At what speed will the prop stop turning?
2. At what speed will the prop start turning again?
3. How much altitude does it take to get from one to the other?

Perhaps the following additional data would be useful:

4. What displacement engine?
5. What compression ration?
6. What prop diameter and pitch?

I'm not asking for true confessions. However, it would be nice to know the source of your data (personal experience, direct from the source, or hearsay).

Thanks,

Chucker

 

[kennyw]

7. Does your engine have a starter installed.

 

[John B]

I have a 8:1 compression ratio 2276cc in my Sonerai. It has a starter. Way back when I took it up cruising about 135 mph clicked off the ignition and kept the speed at 135 with pitch. Took a few seconds but the prop stopped. Probably windmilled less that 20 seconds, continually slowing the whole time. I doubt with the short lightweight wood prop that you could get it turning fast enough to call it windmilling. When I did it the engine would slowly roll through compression on one cylinder and then blip to the next cylinder on compression. At that time I had a Sterba prop on it that i think was a 54-52, but it may have been when I had it repitched to 54-50.