Pitch Your Own Prop with strips.
01-10-2012 | 06:27 PM
#1
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From: Vermilion, OH
Pitch Your Own Prop with strips.
Came across this, website says 50 Knots plus. Looks like it would just hurt top speed. Add a strip and lose rpm???
http://www.motorboating.com/maintena...d=enewsh011012
http://www.veem.com.au/props_profile.php
http://www.motorboating.com/maintena...d=enewsh011012
http://www.veem.com.au/props_profile.php
01-10-2012 | 07:22 PM
#2
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Joined: Oct 2000
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From: Coastal North Carolina
It's not as bad as you would think, although I doubt that it would be efficient for high-speed/surfacing applications where it is important for the prop to act like a wing. When an abrupt edge like that is added underwater, the (incompressable) water tends to stall against it and create a ramp effect. Volvo Penta has capitalized on this effect with their vertical trim blades for cruisers.
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01-10-2012 | 07:44 PM
#3
Neno the mind boggler
Joined: Sep 2001
Posts: 13,080
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From: toledo oh
that looks like the little strips i use in my weed eater 
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08 OPA High Points Champion
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Last edited by glassdave; 01-10-2012 at 07:46 PM.
01-11-2012 | 12:20 PM
#5
arneson-industries.com
Joined: Jan 2001
Posts: 2,782
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From: California
It's a means to change the cup of the propeller more so than the pitch.
They claim it works, but I was more concerned with the life span of the blade as they mill a slot in it for these strips to go into. I don't see it making the propeller stronger with the milled slot. It is like a whicker bill on the car wings Chuck, they can change them quite quickly in/out of water.
They claim it works, but I was more concerned with the life span of the blade as they mill a slot in it for these strips to go into. I don't see it making the propeller stronger with the milled slot. It is like a whicker bill on the car wings Chuck, they can change them quite quickly in/out of water.
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