Electric Outboards on Top Hats ?

Re: Electric Outboards on Top Hats ?

Postby Topi » Sat Jan 25, 2014 4:26 pm

The attachements for the rig do seem a bit flimsy. I was planning to relocate the attachemnts for the back stay, at least to align the eyes so they spread the load through the bolts rather than sideways leverage (then causing stress fractures in the GRP).

How are other backstays attached on Mark 1 sterns ?
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Re: Electric Outboards on Top Hats ?

Postby Phillip » Sat Jan 25, 2014 7:31 pm

Topi,

Finally found a photo of Seaka's stern.
You will note that the lowers of the back stay have swaged terminals and toggle ends.
The splitter also has swagged terminals and toggles as should the top of the back stay.
How is your forestay etc set up?
You can see the back door in place also.

Seaka-Stern.jpg
Seaka's stern arrangement
Seaka-Stern.jpg (58.96 KiB) Viewed 2950 times
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A 1969 Mark 1



Home port is at Dunbogan on the Camden Haven Inlet, Laurieton NSW
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Re: Electric Outboards on Top Hats ?

Postby Topi » Sat Jan 25, 2014 7:36 pm

Thanks for that photo, now I understand what the back door looks like. There is nothing on the vessel that looks like that :(

The stays I plan to replace as they are terrible, good fish hooks around the topping hook (as opposed to topping lift). I can see you have similar chain plates.
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Re: Electric Outboards on Top Hats ?

Postby sam » Sun Jun 22, 2014 8:37 am

verry interested by the idea of eletric prupolsion, by the time you go eltric outboard, why not have it as an inbord, and ceep it away from nasty salt water? power? for just powering along in carlm water I think you would be looking at atleast 3 kw or so, and if it was me I'd want at least 6 peak for pushing under bridges, into wind etc if I needed them, that amont of draw is easy anough to manage for short term, ie just getting on and off the mooring, but for powering any distence, I think you would be locking for a darn big battery bank, and or a gerorator of some sort, and of cause a lot of solar pannels :D
any thauthts
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Re: Electric Outboards on Top Hats ?

Postby Phillip » Sun Jun 22, 2014 10:50 am

Sam,

Great idea but Top Hats are just to small for a dedicated electric motor and all the needed battery banks and solar panels to make it work.

If you are really into electric motors for boats it would be better to get a stink boat that needs a new motor and start from there.

Also, regardless of that, would not be suitable for cruising, as contrary to popular belief, a lot of sail/motoring is done by cruising sailors!

But I have seen a tender driven by one of those fishing electric motors, mind you the Top Hat owner has shore power
and hasn't moved from his pen for some years.
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Home port is at Dunbogan on the Camden Haven Inlet, Laurieton NSW
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Re: Electric Outboards on Top Hats ?

Postby sam » Sun Jun 22, 2014 6:28 pm

at the moment imterested more in an acedemic sense than practically, I dont have the resauces at the moment to build an eletric pwertrain for something the sise of a top hat. I think it may be possable with the recent advances in lithium battries to, pehaps loose the water tank and put 5-10 kwh of lithium in there, it might do an hour- hour and a half of motoring, and cost 10 grand or so, and youd want to be pretty carefull with that much lithium and salt water,
but I agree moast lickly useless for crusing, or really anything withoult shure power, or motoring any distence withoult an auxilery genset, witch would then burn more fuel, be heavy and take up lots of space.
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