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Re: long-tail boats

 

There are a lot of variables. Do you know how fast and how far you need it to go? This will determine your design.
If you want to go 4-5 knots for an hour or two, then a small electric outboard and small battery will work.
If you want to go 15-20 knots, then you are talking about a much bigger battery, which is most of the cost. This will also affect your boat design, due to the size and weight of the battery.

Any reason why you want to use a longtail design? The main benefit of longtails are they are good in shallow water, and can be beached.
This forum can definitely help, but I think you should let us know what your requirements are, and what body of water you are going to use it on. Do you have the boat already?


On Wed, Feb 28, 2024 at 1:20?AM Mogjib Salek <mogjibs@...> wrote:
Hi Kev,

How long would be a ? short ride ?? I need also a cost estimate! Any tip?

Thank you all for your help!!

On Wed 28 Feb 2024 at 01:13, Kev <captainyoung@...> wrote:
If I understand correctly, you want to use the design of long tail boats like this, but you want to switch from a gas engine to an electric motor:

If you want the same performance, you want to go with around 1/3 the rated hp of the gas motor. So for example, if you had a 20 hp gas motor you would want to have around a 6 hp electric motor, which is about 5KW electric motor.
The problem you will have, is that you will need a very large battery bank, unless you are only going on short rides. It is possible though.



On Tue, Feb 27, 2024 at 4:39?PM Phil Boyer via <philaboyer=[email protected]> wrote:
Hi,?
Sounds like you have a sail boat and you need to have an extra long shaft to reach below the water. All motors? are standard long shaft or short shaft. Or you can buy a pod type that mounts under your boat. You may need to design a mount that can extend down when you wish to motor. If you have a picture you could send? I would have a better idea. Or post it on the Facebook page and ask for ideas.

Regards
Phil

On Tuesday, February 27, 2024 at 02:00:50 p.m. EST, mogjibs@... <mogjibs@...> wrote:


Hi,

I was wondering what would be the best electric motor for "long-tail boats" (in replacement for gasoline, diesel etc. motors; these are outboard motors altered to extend their propellers far from the rest of the motor)!

Thank you in advance for your comments, suggestions and tips.

Best,
M

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