seagulls greatest test

[waterworks]

I just moved a 60 ft steel narrow boat 2 miles up the canal with a 102. Must be between 6-10 tonnes.We achieved a frightening near 1 mph, and it steered just fine, the little engine dug in and even bent the 4mm steel plate it was mounted on. It sipped fuel and drank no more than half a tank.

Powerfull little devils aren't they ?

[Dinghy fisherman]

Last time i heard of something this tough and powerful was the love-child of Gengis Khan and Bodica ...

[headdownarseup]

Tuff as old boots these 102's.

I just love 'em to bits.
Not fast by any stretch of the imagination but very dependable never the less.

Now then Waterworks, which particular 102 did you use for this epic "move" ?
Was it the Plus with the ever so big 13" leviathon of a prop, or was it the more slender (and perhaps better looking) conventional model?

And more importantly, where are the pics?


jon


ps did we mention we like pics!

[THCL500J8]

Welcome to the seagull "Plus club"Were plus size motors move plus sized boats. (Notice i said nothing about plus sized men) thcl500j8 mover a 40 foot house boat 3 miles up the Logan river, normally powered by a pair of 25hp outboards, in just over one hour, tide was assisting, and at the end of the job, a fool dropped the motor on the boat ramp breaking the prop.
The replacement prop came from Scotland, so enjoy the beast.

As a kid i remember a 40ft cruiser, being pushed home with an old plus, i was walking along the bank at the time, with my mother and i could keep up with it quite easily.

[waterworks]

[YouTube]https://youtu.be/BzS0R0dRH20[/YouTube]

[Keith.P]

This video is private.

[waterworks]

Changed to public.

[Horsley-Anarak]

https://youtu.be/BzS0R0dRH20

[headdownarseup]

Cool...

By the looks of things, a heavy steel canal boat is probably a bit too much for a 102 plus, but an admirable job all the same. (and there was me thinking my boat was sloooooow)

3 cheers for the bargepusher

jon

[waterworks]

Its not a plus, its a standard model.

[headdownarseup]

That's IMPRESSIVE for a standard model 102.

Which type of prop was on it at the time? 2,3,4 or 5 blades?

Sounds a bit geekey i know, but some of us are interested in just what these motors can and can't do with various props.

pics?

jon

[MIKUL]

mmm so will my 40 plus (3hp)push well against a 6 knot tide,,mounted on a Mayland 14ftr ???

[Adrian Dale]

speed is governed by water line length when the boat is in displacement so at 14 ft your hull speed will be around 5.2 knots. Not till you have the power to lift the hull to plane will the speed increase. so the answer is probably not, whether you use a silver century plus or a 40+, your top speed is likely to be very close to the same. You will just burn more fuel eking out that extra 10th of a knot.

Using very good design (see gull racing) you can bend the formula to give some increased performance, but you will always remain locked into a maximum top speed for the hull shape and length.

AJ

[Pricey]

speed is governed by water line length when the boat is in displacement so at 14 ft your hull speed will be around 5.2 knots. Not till you have the power to lift the hull to plane will the speed increase. so the answer is probably not, whether you use a silver century plus or a 40+, your top speed is likely to be very close to the same. You will just burn more fuel eking out that extra 10th of a knot.


AJ

So as a newbie to all this my understanding of the above is that with a displacement hull that theoretically if you start at full throttle, measure your speed then throttle back stopping at the point of a speed reduction, then other than water currents/ wind resistance requiring extra throttle to maintain that speed, more throttle is just wasteful with the prop thrashing around for no extra speed gain ?
Is that correct?

[waterworks]

That's IMPRESSIVE for a standard model 102.

Which type of prop was on it at the time? 2,3,4 or 5 blades?

Sounds a bit geekey i know, but some of us are interested in just what these motors can and can't do with various props.

pics?

jon

I have moved the boat some more miles, and it pushes it just fine at no where near high revs, the mountings on the Seagull are the weak point, i may have to fabricate a strong steel mount for it, then i can let rip . Seeing as I can't stop the boat if I need to, its best going slow.