Tuesday, February 23, 2016

[Electric Boats] Re: Why gear reduction?

 

Again, bottom two rows of 2nd table with 2 blade 12"D max prop at 7" pitch didn't upload, so here is the complete table. 


Throttle setting        2.0           2.5               3.0             3.5               4.0           4.5               5.0        

Amp draw                2              4                  6               10                 16           24                34

Speed knots          1.4            1.8               2.1             2.5                2.9           3.6              4.1


RPM                      603           828             1022         1260            1480        1768             2003


Voltage                  51.3          51.1             50.9          50.6             50.4         50.1            49.2


Power  (Kw)         0.08           0.18             0.31          0.48            0.78         1.20             1.67



And John, 

you asked what was the gear reduction on my Electroprop E-7 (now aka model Sailor Plus).  If memory serves me correctly it was set at 1.75 to 1. 

Jamie

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Posted by: Avalon@nbnet.nb.ca
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