Midwest Seguin? - RC Groups
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Jan 20, 2011, 07:33 AM
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Midwest Seguin?

I have just bought a slightly damaged Seguin. It is an earlier model as it's plank on frame and it appears to have been a display model as there are no signs of it ever being fitted out with running gear.

I am going to install a steam plant, but can anyone tell me the weight of a Seguin ballasted to the water line?

It's 39" long, but not nearly as deep or beamy as any of my other tugs, so I'm not sure what plant will suit it.

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Jan 20, 2011, 03:51 PM
3 Blades to the Wind
Shaun Hendricks's Avatar
A small V or in-line twin should power that around nicely. Depends on your budget and how finished you need the motor to be.
Jan 20, 2011, 05:06 PM
Registered User
I was thinking about using one of my Cheddar Puffins, but the model is very lightly built and I think that it would be overpowered, that's why I was asking if anyone knew the ballasted weight.
Jan 20, 2011, 08:02 PM
3 Blades to the Wind
Shaun Hendricks's Avatar
Well, a V style would sit lower in the hull than an in-line, but a 39" model is going to have a LOT of displacement available. I don't know how much a Puffin weighs.
Jan 20, 2011, 08:12 PM
Mmm, tugs...
patmat2350's Avatar
The Seguin isn't that heavy... but it was designed for commercial model steam plants. Most anything that fits will be ok.
Mar 21, 2011, 07:54 AM
Registered User
Well the Maccsteam 3.5" boiler arrived today, perfect timing, as I have just finished varnishing the hull.

In the end, I decided to use my Gage TVR1A engine.

Mar 21, 2011, 11:41 AM
Grumpa Tom
Kmot's Avatar
Ooooh, that looks nice in there! More photos of your TVR1A please?
Mar 21, 2011, 11:53 AM
Registered User
Just tank (bath) tested her, and she just needs a little weight in the stern to get right onto the water line.

The engine is just a bog stock TVR1A finished in blue enamel. Not too pleased with the finish, as it has already chipped and is all but impossible to refinish neatly.

I have to make base plates for the engine and boiler and also work out where the gas tank will live. Not happy that the throttle valve I bought requires a 90 degree servo action, which will be difficult to achieve, so I might use an alternative valve that I made for an oscillator quite some time ago.

Trying to make it all neat and functional which is not always straightforward... at least not for me.

Mar 21, 2011, 11:43 PM
Registered User
peconic steam's Avatar
Neil, You will have more than adequate power with the Maccsteam 3.5 and TVR1A set up you've provided. I think you'll need to be raising the waterline forward a little, though- Nice boat / steam plant combination!
Mar 22, 2011, 01:40 AM
Taking care of the pond.
Nice looking boiler.
Mar 22, 2011, 03:09 AM
Registered User
Originally Posted by peconic steam
Neil, You will have more than adequate power with the Maccsteam 3.5 and TVR1A set up you've provided. I think you'll need to be raising the waterline forward a little, though- Nice boat / steam plant combination!
I have just used the engine I had that would turn a nice big propeller; given how light the model is, I think it will have an excess of power.

The waterline does not look right to me, but it is as the original builder had it, and until after the first sailing trials I'll leave it alone. It would only be a matter of some weight in the bow (where there is plenty of space) and I could soon raise it.
Mar 22, 2011, 11:55 AM
Damp and Dizzy member
Brooks's Avatar
Airplane servos normally come with +/- 45 deg action ( a little less than 90deg total swing). You can increase that with a computer radio such as the Spektrum, I do that all the time for my square riggers. If you want even more servo swing, a "servo doubler" can be purchased - this will give you 160-170deg total swing with no modification of Hitec HS-82MG or HS-225MG. Other servo brands likely do the same, I've not tested them.
Mar 22, 2011, 02:25 PM
Registered User
Servo doubler sounds interesting. I'll look into that, thanks.

Mar 23, 2011, 06:24 AM
dunc2504's Avatar
What make of throttle valve did you go for , only I suspected I would need 90 deg on mine , but in practice I never needed fully open , as it was at full throttle long before that.
I only needed the first 30 to 40% of movement.
That was the valve on the Allison II and the same boiler / engine combo that you have .
Mar 23, 2011, 06:41 AM
Registered User
I got this from RDG Tools, I think it's made by 21st Century Steam.

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