electric "pounds thrust"

[Nathan Wagner]

I know there's been discussion on this... but please excuse my laziness.
Can anyone answer the following questions related to electric outboard
trolling motors on a Vega:
-How fast would "40 pounds thrust" push my Vega?
-Does anyone have experience actually using an electric outboard? If so,
would b
[Non-text portions of this message have been removed]

 

[SVFlyAway]

I've messed around with a Minn Kota 55 pound thrust on my Vega. I actually
use it as my stern thruster (I have a totally removable bracket, so I can
just put it on when I need too). However, I have used it to move the Vega
around the marina and it does move the boat, but rather slowly. In calm
water I suppose I could get up to 3kts. I would never use it in a wind or
against a current.

 

[zippydoda_captain]

Ive been told as a very rough guide, 1hp equates to 10lbs thrust at the prop. So if this is correct your 40lbs thrust is about equivilent to a 4hp engine.

Nathan Wagner wagnern@... wrote:

 

[SVFlyAway]

That is a true comparison on paper. However, the props on trolling motors
are relatively small and inefficient, so there is loss there. Part of that
is because of the construction with the submersed motor. I do know that my
55lb thrust Minn Kota doesn't have anywhere near the thrust of my 5hp
Mercury outboard. I never tried this, but I can plane my Tinker with the
Mercury and the Minn Kota would probably just move it through the water.

 

[maarten_vanemmerik]

We used a 0.5 hp electric outboard to power our dinghy on a trip to the channel islands last week. We have two 65AH batteries on board and use the one for starting the engine as the power source for the outboard. Experiences are mixed, although positive over all:



+ light weight

+ easy to stow

+ silent

+ cheap (150 EUR)

+ clean (no petrol and grease)

+ recharge by running the inboard diesel engine

- started to show rust marks after two days, although it was supposed to be sea water resistant

- have to carry battery in an out

- not enough power in strong winds



I read that 40 lbs equates to 3,5 hp and can be used for boats of 1300 Kg (50% of vega weight). Our 0.5hp certainly is not enough to power the Vega, although it is possible to move the board around in the harbour if there is no wind or tide.

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Maarten van Emmerik



From: AlbinVega@yahoogroups.com [mailto:AlbinVega@yahoogroups.com] On Behalf Of Ray Wilton
Sent: vrijdag 29 juli 2011 21:32
To: AlbinVega@yahoogroups.com
Subject: Re: [AlbinVega] electric "pounds thrust"





Ive been told as a very rough guide, 1hp equates to 10lbs thrust at the prop. So if this is correct your 40lbs thrust is about equivilent to a 4hp engine.

Nathan Wagner wagnern@... mailto:wagnern%40azlearn.org wrote: