Friday, August 2, 2013

Re: [Electric Boats] New, bare, 50' hull for electric propulsion

 

Interesting..
I wonder what it will sell for. Anyone else care to guess ?

I suspect the 5000$ minimum bid might take it.

Does not look too good to, esthetically. No history from designer or builder. All sorts of caveats in sale. Designer/builder out of money/patience,
It may, possibly, have usage value.
Insurance would likely be hard to impossible, as "prototype", and "no guarantees" are usually not a good sign when trying to insure something.

The hull might work well .. no reason to think it would not.
BUT why did they not put a cheap used 10-20 hp outboard on it to prove this for maybe 2000$ ?

I am not against the hull in any way. It might be efficient.
Will it stand up in real waves ? Pounding ?

IF the surface finish is as they say rough, and as can be seen in the photo, this is not a sign that experience, naval architects, or proper scantlings were used.
Likewise, its too light at 6000 lbs (for use in open sea, class A usage).
They do speak about crossing the atlantic, or to caribbean. Those are open waters, with storms.

Likewise, luan and fibreglass is not a good strong light combination. Either strong or light, not both.
Besides, cored boats or boats with plywood and glassfiber usually always fail. Fast unless excellent building practice and experience and materials and techniques were used.
This does not seem to be the case, as neither boatyards or naval architects appear in the descriptions.

Given that it is still open inside, making it stronger would be easy.

I dont like the alu beam. Its too small. I have my doubts about the welds, if any. Welding alu well is hard, especially for marine use as the main structural component.
I think its mad not to use steel which is much easier, more reliable, and readily reworked on in the future.
Steel is not heavier- actually alu and steel have a similar strength/mass ratio.

I am not disparaging the efforts of the builder - anyone can build a boat, well, even the first time. Lots of examples exist.

Usually such excellence is evident, in things like stating the alloys used, things like "qualified welds", at minimum "dye penetrant tested" or x-rayed seams, excellent fit and finish, cnc cutting, computer modelling in freeship or any other of numerous computer models, and so on.



 

This prototype hull has come up for auction and seems ideal for a larger electric powered cruiser. It is supposedly a very efficient hull form. I can imagine a motor in each outrigger and solar panels on the cabin roof. I'm not sure how you'd deal with the aluminum beam running through the galley!

http://cgi.ebay.com/ebaymotors/XENOCRAFT-X-50-extremely-fuel-efficient-motor-cruiser-/190879294732?ViewItem=&ssPageName=ADME:B:SS:US:1123&item=190879294732&forcev4exp=true_,_._,___



--   -hanermo  

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