Neil,
I was told by a dealer or someone at Torqeedo USA that it expensive because it was still being made as a prototype and not converted to their production system. It appears to be the same or similar material but white rather than orange.
I did a little more work on my reverse engineering numbers last night and my best estimate is somewhere between 12 and 13 inch effective pitch on the V30. In my case, the slip appears to be about 7% on the std prop and I am assuming the same on the V30. Another variable is the top rpm. I am running 50 to 52 volts rather than 48v. That may be kicking the top rpm up proportionately.
I am very happy with it. I need the additional speed and the V30 did it without any apparent loss in efficiency.
Please realize that I am using this on a 15 ft. LWL, 700 lb. total loaded weight planing hull running at 11 to 13 mph. I have no idea how this would work on a displacement hull.
Ned
On Sep 6, 2011, at 10:04 PM, F Neil Simms wrote:
--- In electricboats@yahoogroups.com, Ned Farinholt <nedfarinholt@...> wrote:
>
> Neil,
> The diameter of the V30 is about 12.5", a little bigger than the standard. I tried to do some reverse engineering calculations, based on performance, to determine the pitch but it was not conclusive. I would estimate it is about 12" compared to the 10" standard, though it looks more radical than that.
> Ned
>
Thanks, Ned.
Do you have any idea why it costs 5 times what any of their other props does (is it made out of different material)?
Neil
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