why are FE boats not using 4 or 5 blade prop?

[fuse01]

i was just watch the miss geico ( real ones) and they have sick 6 blades props.

so the question is why are we not using 4 or 5 blades? what are the limitations ?

[Ub Hauled]

I have a 5 blade prop and tried it... it turns out it would not hook... I believe that there is too much aeration.

[Fluid]

Small diameter multi-bladed props don't work well on most models. Two or three bladed props are the fastest. Some things just do not scale down well.



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[epsonjackson]

it would have been great if it could scale down well, 5-6 props would have been better

[egneg]

The only one I know that has had any luck with them is graill. He used a pair of prop shop 8015/5's cut down to 65mm on the Platinum Princess. This is a 96" cat and the amp draw went up and run time went down. He said he would try them again after he got the turbines put in.

Chuck

[Boaterguy]

It would be neat to try, maybe i'll get one for my rigger, just for looks and fun, would a 35mm/5 be about = to a x447?
Edit: I just went on propshop and I couldn't find any 5 blade, where should I look?

[Punisher 67]

Small diameter multi-bladed props don't work well on most models. Two or three bladed props are the fastest. Some things just do not scale down well.
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I once tried a 5 blade prop on my 57" Apache , I was an absolute turd.....in-fact it ultimately bent the 3/16 shaft from cavitation

[jevmax]

Two primary reasons. Load and drag.

[jcald2000]

And we turn our props a lot more rpm so the wake from preceding blade is disturbing the flow around the trailing blade. You won't see any 30,000 rpm shaft speeds on the big boats. At least not when I was racing them 20 years ago. LOL

[Boaterguy]

Oh, so pretty much lots of aeration?

[bigwaveohs]

Imagine the fun to S&B a 5-blade prop!

[Gary]

All you have to do is buy an Eagle Tree set up to test all the mods you make on your boats. Its the best part of boating in my opinion. This way any prop change will show the MPH and RPM so you can work from there. You just cant guess from "eye ball" readings.

[Punisher 67]

Imagine the fun to S&B a 5-blade prop!

Yes I lived through that , It was a challange .

[Boaterguy]

Yes I lived through that , It was a challange .

How is it done?

[egneg]

To modify a 5 blade and then S/B it is a real challenge. I did the work for graill's props.