MadSci Network: Engineering

Subject: Why don't boats have transmissions?

Date: Mon Mar 5 16:16:07 2001
Posted by John
Grade level: 10-12 School: Fenton High
City: Fenton State/Province: MI Country: USA
Area of science: Engineering
ID: 983826967.Eg

I was just wondering why every small to middle-sized boat I've been in 
doesn't have any type of transmission.  I know that cars have transmission 
that allow them a comfortable engine rpm at speeds from 0-80 mph.  It 
seems like boat makers (especially those who manufacture speed boats) 
would use some sort of gearing to allow the boat's prop to turn faster 
than the engine, for a higer speed and greater efficiency.  Or is this not 
possible beacause the properties of water are very different than from 

Re: Why don't boats have transmissions?

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