Tuesday, November 30, 2010

[Electric Boats] Re: Stiletto conversion

 

I couldn't find any specs for a Stiletto 26 but the 27's range from 1100 pounds for the base model to the 27SE at 1550 pounds. Coming from a mono, you probably won't mind sacrificing the 22kt top speed, but you will find that these boats don't handle extra weight very well. This includes tacking and regular sailing.

I know I've said similar things before, but imagine your boat with a regular engine (a less than 10hp outboard in your case) and a gas tank that only holds one gallon. Convert the drive to electric and the one gallon gas tank weighs more than 500 pounds in AGM or FLA batteries. Cut the weight in half and the tank gets reduced by about 60% due to Peukert's Effect. So for the weight of a fairly hefty crewman, you get the equivalent of a little more than 6 cups of gas.

If that is OK, great. I only bring this up so that you can understand the tradeoff. I suggest that you sail the boat as is, before you convert it, just to get a feel for a performance multi.

One of the original proponents for ULDB boats, Bill Lee, said it best, "Fast is Fun!" and I have observed that lighter is faster. Welcome to the dark side....

Fair winds,
Eric
Marina del Rey, CA

--- In electricboats@yahoogroups.com, Dave Kellogg <inganear1@...> wrote:
>
> Eric,
> I understand were your coming from on the electric drive for your Tri and not
> wanting the weight of the batteries. Something that the multi hullers should
> also consider is the fact that the multi's are much, much slipperier than the
> sleekest mono. The battery bank could be much smaller and if balanced in the
> hull or hulls on a Cat the weight would be noticed less in performance. I just
> bought a 26 Sitletto and will probably go electric with it, maybe a little
> different from the normal electric hung off the back or through a hull. I'll
> run the electric drive in a center pod under the deck and a long shaft on a
> pivot to extract totally while sailing. I can split the bank and install them
> closer to the center of the hulls for better weight distribution. I've been a
> mono sailor all my life and I'm kinda excited about having these 2 Cat's to play
> with... Dave K
>

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