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09-08-2008, 08:13 PM
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#1
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Registered User
Country: Essex
Location: Great Stambridge Essex
Occupation: Director Paving company
Interests: Boating/Squash
Cruising area: Essex Marina/crouch southeast coast
Join Date: Sep 2004
Location: Great Stambridge Essex
Posts: 2,033
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Prop speed calculator
What happened to the calculator that works out max speed allowing for prop slip etc?
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09-08-2008, 08:19 PM
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#2
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numbskull
Country: United Kingdom
Location: South
Occupation: none
Interests: none
Boat name: Leviathan
Boat make: Phantom 28
Cruising area: South Coast
Join Date: Mar 2004
Location: South
Posts: 15,959
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what's ya revs, ratio and pitch?
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"I Agree with everything you say really!" - John Cooke to Jon Fuller - 26-01-2013
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09-08-2008, 08:21 PM
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#3
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Registered User
Country: Essex
Location: Great Stambridge Essex
Occupation: Director Paving company
Interests: Boating/Squash
Cruising area: Essex Marina/crouch southeast coast
Join Date: Sep 2004
Location: Great Stambridge Essex
Posts: 2,033
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6400 1.67 28pitch
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09-08-2008, 08:28 PM
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#4
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numbskull
Country: United Kingdom
Location: South
Occupation: none
Interests: none
Boat name: Leviathan
Boat make: Phantom 28
Cruising area: South Coast
Join Date: Mar 2004
Location: South
Posts: 15,959
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89.42mph assuming 12% slip (and accurate rpm and prop pitch)
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"I Agree with everything you say really!" - John Cooke to Jon Fuller - 26-01-2013
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09-08-2008, 08:47 PM
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#5
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Registered User
Join Date: Mar 2004
Posts: 6,891
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09-08-2008, 08:50 PM
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#6
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Registered User
Country: Essex
Location: Great Stambridge Essex
Occupation: Director Paving company
Interests: Boating/Squash
Cruising area: Essex Marina/crouch southeast coast
Join Date: Sep 2004
Location: Great Stambridge Essex
Posts: 2,033
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Thanks ive seen more then that so looking good
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09-08-2008, 08:59 PM
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#7
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Registered User
Country: UK
Location: Weston Super Mare
Occupation: Electrical Engineer
Join Date: Mar 2004
Location: Weston Super Mare
Posts: 6,351
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Taz if they are 300xs's i'm pretty sure the gear ratios are 1.62:1 not 1.67
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10-08-2008, 09:43 AM
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#8
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Registered User
Country: Essex
Location: Great Stambridge Essex
Occupation: Director Paving company
Interests: Boating/Squash
Cruising area: Essex Marina/crouch southeast coast
Join Date: Sep 2004
Location: Great Stambridge Essex
Posts: 2,033
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sorry type fault are 162
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10-08-2008, 11:44 AM
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#9
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numbskull
Country: United Kingdom
Location: South
Occupation: none
Interests: none
Boat name: Leviathan
Boat make: Phantom 28
Cruising area: South Coast
Join Date: Mar 2004
Location: South
Posts: 15,959
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In that case, 92.18mph based on 12% slip
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"I Agree with everything you say really!" - John Cooke to Jon Fuller - 26-01-2013
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10-08-2008, 12:02 PM
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#10
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Registered User
Country: Essex
Location: Great Stambridge Essex
Occupation: Director Paving company
Interests: Boating/Squash
Cruising area: Essex Marina/crouch southeast coast
Join Date: Sep 2004
Location: Great Stambridge Essex
Posts: 2,033
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woo hoo thanks jon
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12-08-2008, 06:13 PM
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#11
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Registered User
Country: hamburg , germany
Occupation: electronics
Interests: boating, audio , PC
Boat make: Fletcher Arrowshaft 199
Engines: Yamaha 225
Cruising area: baltic sea
Join Date: Dec 2005
Posts: 115
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hey, just do it for yourself and download my own prop-speed calcultor, you can calculate with cupped props and save your results to your hard-disk.
its a small program and a smal outboard database is inside.
download!
Best regards!
Andi
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12-08-2008, 11:00 PM
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#12
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Registered User
Join Date: Oct 2007
Posts: 1,374
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Do you get less prop slip on a twin engine boat.
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