Who's running a #6 in a single engine application
#152
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Again thanks for all the help Pat, as soon as we can work all of the details out, should be a hell of a combination, BTW how much speed increases should I look for if any with the Weisman...
#153
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I havent stop talkig about them, I really would love to have the weisman, Hey Pat does Weisman have 6 mo no interest but seriously I haven't ruled anything out, if I do a SCX it will only be until I can get the funds for the Weisman, like I said on other post, Pat is the final desision, just want him and Steve to work out all of the details on instalation and an exact price for all of the goodies be working on me a brother-in-law price Pat.
Again thanks for all the help Pat, as soon as we can work all of the details out, should be a hell of a combination, BTW how much speed increases should I look for if any with the Weisman...
Again thanks for all the help Pat, as soon as we can work all of the details out, should be a hell of a combination, BTW how much speed increases should I look for if any with the Weisman...
I think you'd see at least 5mph, maybe 10, but Pat could tell you better than I.
#154
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#155
www.weismann.net
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132mph w bravo.....
What Rpm?
What prop(dia, # of blades pitch)?
What ratio?
What is the redline on new engine vs old?
What trim position(pos,neg or even)
Were you out of engine or Euevos?
pat W
What Rpm?
What prop(dia, # of blades pitch)?
What ratio?
What is the redline on new engine vs old?
What trim position(pos,neg or even)
Were you out of engine or Euevos?
pat W
#156
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RPM 6400
Prop custom 36 labbed done @ lake X for RPM
ratio 1:36
engine redline is 6500
no clew I run by feel and by ear
and again I believe it had just couple of MPH left water was flat and my nuts were just starting to change color
here are a couple of photos, 1 of Garminn and Livorsi showing 129, and another run when garmin battery died...
#157
arneson-industries.com
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129 @ 6400 with a 36?
20% slippage.. Yuck.
20% slippage.. Yuck.
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Arneson Surface Drives www.arneson-industries.com
#158
Chris
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Even calculating it as a 35 pitch (which is what you usually do with merc props) it equates to about 18% slip.
Not to be disrespectful in any way..But..
what is the big deal with that... I think that slip is over emphasized. Many boats run the fastest at between 15% - 20% slip.
Gary Taylor ran about 20% slip while setting the world speed record for a single engine v-hull.
The "cat-killer" runs about 15% slip.
I have done literally hundreds of hours of testing on my boat, using different drives, spacers, and props. I have had my slip as low as 7.2% and as high as 22% on the top end, and my boat is the fastest and handles the best with slip between 14% and 16%. I had a naval hydrodynamics engineer tell me that I should stop being so focused on slip, and be more concerned with performance and speed. When I started doing that.. my boat started getting faster.
130 mph is darn fast for a single engine.. 26 ft cat.
Just my humble opinion,
Chris
Not to be disrespectful in any way..But..
what is the big deal with that... I think that slip is over emphasized. Many boats run the fastest at between 15% - 20% slip.
Gary Taylor ran about 20% slip while setting the world speed record for a single engine v-hull.
The "cat-killer" runs about 15% slip.
I have done literally hundreds of hours of testing on my boat, using different drives, spacers, and props. I have had my slip as low as 7.2% and as high as 22% on the top end, and my boat is the fastest and handles the best with slip between 14% and 16%. I had a naval hydrodynamics engineer tell me that I should stop being so focused on slip, and be more concerned with performance and speed. When I started doing that.. my boat started getting faster.
130 mph is darn fast for a single engine.. 26 ft cat.
Just my humble opinion,
Chris
#159
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Thats 129, and 132, and the best part about it is the a$$ end of the boat didn't want to swap ends at that speedlike a single surface drive does, and 132 feels the same as 90...you can sit back and relax, it gets boring... trust me slip doesn't bother me @ all and it was a labbed prop...the boat comes out to around 16-18% slip, and it loves it...by the way do your math with any other cat 26' long that ways 5,000lbs with the same setup and it would be much slower
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Even calculating it as a 35 pitch (which is what you usually do with merc props) it equates to about 18% slip.
Not to be disrespectful in any way..But..
what is the big deal with that... I think that slip is over emphasized. Many boats run the fastest at between 15% - 20% slip.
Gary Taylor ran about 20% slip while setting the world speed record for a single engine v-hull.
The "cat-killer" runs about 15% slip.
I have done literally hundreds of hours of testing on my boat, using different drives, spacers, and props. I have had my slip as low as 7.2% and as high as 22% on the top end, and my boat is the fastest and handles the best with slip between 14% and 16%. I had a naval hydrodynamics engineer tell me that I should stop being so focused on slip, and be more concerned with performance and speed. When I started doing that.. my boat started getting faster.
130 mph is darn fast for a single engine.. 26 ft cat.
Just my humble opinion,
Chris
Not to be disrespectful in any way..But..
what is the big deal with that... I think that slip is over emphasized. Many boats run the fastest at between 15% - 20% slip.
Gary Taylor ran about 20% slip while setting the world speed record for a single engine v-hull.
The "cat-killer" runs about 15% slip.
I have done literally hundreds of hours of testing on my boat, using different drives, spacers, and props. I have had my slip as low as 7.2% and as high as 22% on the top end, and my boat is the fastest and handles the best with slip between 14% and 16%. I had a naval hydrodynamics engineer tell me that I should stop being so focused on slip, and be more concerned with performance and speed. When I started doing that.. my boat started getting faster.
130 mph is darn fast for a single engine.. 26 ft cat.
Just my humble opinion,
Chris