Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - Electric sailboat motor: new conversion project (update: project shelved)

MetroMPG · 05-05-2010, 04:12 PM

FYI, I'm a noob when it comes to propeller theory. I haven't read up on it yet.

But the prop on this Sail Drive is a 3 blade, 11 inch diameter, 9 inch pitch.

The gearcase has a 14:28 ratio. (Why didn't they say "1:2"?)

The maximum operating speed of the ICE is "3300-3700" RPM according to the manual.

ICE idle speed (in gear) is 600-700 RPM, and that's enough to move the boat along at about 2 knots (2.3 mph / 3.6 km/h).

05-05-2010, 04:12 PM	#12 (permalink)
MetroMPG Batman Junior Join Date: Nov 2007 Location: 1000 Islands, Ontario, Canada Posts: 22,534 Blackfly - '98 Geo Metro Team Metro Last 3: 70.09 mpg (US) MPGiata - '90 Mazda Miata 90 day: 54.46 mpg (US) Appliance car Mirage - '14 Mitsubishi Mirage ES (base) 90 day: 57.73 mpg (US) Thanks: 4,082 Thanked 6,979 Times in 3,614 Posts	FYI, I'm a noob when it comes to propeller theory. I haven't read up on it yet. But the prop on this Sail Drive is a 3 blade, 11 inch diameter, 9 inch pitch. The gearcase has a 14:28 ratio. (Why didn't they say "1:2"?) The maximum operating speed of the ICE is "3300-3700" RPM according to the manual. ICE idle speed (in gear) is 600-700 RPM, and that's enough to move the boat along at about 2 knots (2.3 mph / 3.6 km/h). __________________ Project MPGiata! Mods for getting 50+ MPG from a 1990 Miata Honda mods: Ecomodding my $800 Honda Fit 5-speed beater Mitsu mods: 70 MPG in my ecomodded, dirt cheap, 3-cylinder Mirage. Ecodriving test: Manual vs. automatic transmission MPG showdown EcoModder has launched a forum for the efficient new Mitsubishi Mirage www.MetroMPG.com - fuel efficiency info for Geo Metro owners www.ForkenSwift.com - electric car conversion on a beer budget