3pt Concrete Mixer

Hey?  Anybody ever use/own one of these???

 

I'm needing to know at what engine rpm they worked best at.

 

I'm in the middle of building one, and need to decide whether to gear it to run at idle, or a faster engine speed.

 

Not sure how much power they require (I'm gonna use it on 90hp tractors) to mix 9cu ft of mud at a whack.  I'm sure 90hp is plenty, but at idle?

 

Thanks

 

 

3pt Concrete Mixer