Best prop to stop Ventilation during turns at almost any speed ?

[cyclops2]

Which company has the best design to prevent ventilation ?

Do not care about speed.

 

[gonzo]

Depending on the application there will be a variety of answers. On outboards and sterndrives, a properly designed hull with the anti-ventilation plate at the right height will prevent prop ventilation.

 

[powerabout]

lots of cup and rake
its not exhaust getting back to the blades is it.
What type of prop is it now

 

[cyclops2]

It is a Black Diamond Aluminum 3 blade 14.25" X 21" ?? Smuged .

On a 5.0L 220 hp Mercruiser. Can ventilate at any speed or turn rate at any speed. Drive in or trimmed out

Opinions on a Power Tech 4 blade with a high rake & cup. I was told the PTC4 would be one of the most difficult props to ever ventilate.

 

[powerabout]

as Gonzo says also has a lot to do with the boat and install of the drive.

 

[Mr Efficiency]

Try a cupped stainless prop to see what improvement you get.

 

[powerabout]

if the drive is installed high then all bets are off that you can fix it.
Do you lose thrust or just hear the noise?

 

[Mr Efficiency]

I have experimented with engine heights on outboards and was a little surprised by how high you could go and still not have the prop "let go" ( on smooth water), just gain engine rpm, and probably a little boat speed. I/O is the same principle. But the test boat had cupped stainless, I once bought a twin outboard boat that played up badly with cavitation/ventilation, switched from alloy to stainless and never had any more trouble.