Made some changes

[Danny King]

Back together for testing made several changes and it’s back together.

 

[Terry Keeley]

What props are they?

 

[Danny King]

2727 highly modified

 

[Matt Fobes]

2727 highly

2727 highly modified

Danny where did you buy those pipe mounts? Is there a book or something else that would show me how to setup a twin? Thanks Matt

 

[Danny King]

Danny where did you buy those pipe mounts? Is there a book or something else that would show me how to setup a twin? Thanks Matt

The clamps are adel clamps. Search that. O buy them over size and custom fit them. The part mounted on the boat are old cmdi. I think Speedmaster’s has that part.

 

[Danny King]

I’d post the set up question in general. I can’t think of one but there are books and others will know that answer.
The best bet is to make a single run real good then do a twin. The set it isn’t much different. More lift because the 2 props and more acceleration. Twin are challenging but rewarding

 

[John Beardslee]

Danny are you still testing the air cooled heads?

 

[Matt Fobes]

I’d post the set up question in general. I can’t think of one but there are books and others will know that answer.
The best bet is to make a single run real good then do a twin. The set it isn’t much different. More lift because the 2 props and more acceleration. Twin are challenging but rewarding

Ok thanks. I have a old A/S Cobra 80 with the solid popular sponsons so I kind of know what you are talking about with a twin.

 

[Danny King]

Danny are you still testing the air cooled heads?

Yes. They work awesome. Except for one thing. I’ll make another set soon. I t isn’t a cooling issue. It is a strength issue. Easy to correct.

 

[Timbo Whalen]

2727 highly modified

Yep, appears to be another guy who found the trick with radiused tips.

 

[shoboat]

Boaters,

It is not necessarily the rounded tips that work so well, how about the correct diameter reduction, proper blade area, or improper Strut height.
More to it than meets the eye so to speak.

Enjoy Testing,

Mark

 

[Timbo Whalen]

Boaters,

It is not necessarily the rounded tips that work so well, how about the correct diameter reduction, proper blade area, or improper Strut height.
More to it than meets the eye so to speak.

Enjoy Testing,

Mark

Exactly....however, there's some science in the tip radii.

 

[Mike Hughes]

Exactly....however, there's some science in the tip radii.

yes there is

 

[shoboat]

Tim & Mike,

Do you two want to share that science with us all? Interesting topic that I am sure others would like to know about as well.

Thanks For Sharing Ahead Of Time,

Mark

 

[Timbo Whalen]

Tim & Mike,

Do you two want to share that science with us all? Interesting topic that I am sure others would like to know about as well.

Thanks For Sharing Ahead Of Time,

Mark

No....you flat out told me on the phone of recent that, in effect, it wasn't a good idea, Mark. I'm not going to argue with you.

When you've earned a BSME, wrote a ME thesis on Fluid Dynamics and added that to your prop experience, then we'll talk.
Until then, I'll leave those conversations between my friend, Jim Russell, and myself.

I don't have the time, nor inclination to dick around doing props....that's why I buy yours, and mod from there if needed, and also because, generally, you're a pretty swell guy.
You do a great job on the props, especially considering what you have to work with, with respect to some of the raws.

The info B-Blades affords on their site is rudimentary basics for the layman, at best.

Have a terrific day!