Prop to inlet clearance

A little while ago I said 10mm was extreme - turns out I was very wrong.

Check out this highly modified Pitts Special from the USA.

Prop to inlet clearance must be about 5mm or less!

I'm still going to go for at least 10mm myself - this allows for some movement of the engine and cowling.

Proper blog post coming later in the week - just having issues with downloading photos at the moment.