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Old 09-08-2008, 08:13 PM   #1
Taz
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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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Old 09-08-2008, 08:19 PM   #2
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what's ya revs, ratio and pitch?
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Old 09-08-2008, 08:21 PM   #3
Taz
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6400 1.67 28pitch
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Old 09-08-2008, 08:28 PM   #4
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89.42mph assuming 12% slip (and accurate rpm and prop pitch)
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Old 09-08-2008, 08:47 PM   #5
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http://www.go-fast.com/bam_marine_knowledge_base.htm
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Old 09-08-2008, 08:50 PM   #6
Taz
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Thanks ive seen more then that so looking good
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Old 09-08-2008, 08:59 PM   #7
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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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Old 10-08-2008, 09:43 AM   #8
Taz
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sorry type fault are 162
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Old 10-08-2008, 11:44 AM   #9
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In that case, 92.18mph based on 12% slip
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Old 10-08-2008, 12:02 PM   #10
Taz
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woo hoo thanks jon
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Old 12-08-2008, 06:13 PM   #11
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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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Old 12-08-2008, 11:00 PM   #12
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Do you get less prop slip on a twin engine boat.
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