The Unofficial Mamod and Other Steam Forum

mogogear · Last edited by mogogear on Thu Apr 10, 2008 2:36 am; edited 3 times in total

Barring a voracious postal clerk the second boat project will arrive here in a week or so. A "looks like" hand build boat- Navy style but soon to be modified also into the Bowman style.

She is 35" long-

Yes a big girl-!!! I am shooting for a "Peggy size" launch. I think that is one of the former models I saw. She is also 8" abeam. Ruddered and propped already - we will see if they are keepers or not. It was built with RC in mind-

The seller thinks it was made in the 1970-80"s - so not antique really.. OK, almost twice as old as James and a couple of the others

Here is the exploded view with all superstructure removed and will be most likely scrapped. Too bad someone spent a lot of time and Grey paint!!

Here is a side view of the hull. She has a little "vee" to the hull- so not a pure launch- but that should help with any stability..

I see most of the decking going away and hopefully a nice removable natural wood deck aft-- that juts out past the rear transom like I have seen in an old "Peggy" advert from Hobbies- I think???--

Nice to have a stand thrown in to boot as well...

Doctor, Ready the Dremel SAW!!!

Muhaa HA HAAA HAAA !!

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regards,

Mo

This week I are His Most Noble Lord Mo, the Apocalyptic of Old Tonbridge Wafers

johnreid · Posted: Mon Feb 18, 2008 1:18 am Post subject:

I like it, there is so much potential there.
Keep us posted as to what you do with it.
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Les · Posted: Mon Feb 18, 2008 6:29 am Post subject:

What steam plant are you putting in her?
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mogogear · Posted: Mon Feb 18, 2008 6:40 am Post subject:

I am unsure yet Les - perhaps the Modeen Twin as it is supposed to power boats up to 40" or so and I may find another smaller single piston to run the more Snipe -like boat in my Project 1. I am looking at a casting kit that is ready machined or what ever I come across. I truly love the aspect of having many smaller projects to work on in the this larger project- hull, cowling, rudder system, engine / power plant - paint / RC etc..

Here is the Modeen- - undelivered as yet and then needs to be assembled as a unit. reversing though!!

And here is the castings set that I am also playing wit the idea of assembling. Anyone have any experience with this design ??

http://cgi.ebay.com/ws/eBayISAPI....sPageName=STRK:MEWA:IT&ih=004

If it is truly double action - then it is "self starting" ??? I am checking to see how tall the finished engine is
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regards,

Mo

This week I are His Most Noble Lord Mo, the Apocalyptic of Old Tonbridge Wafers

Les · Posted: Mon Feb 18, 2008 7:10 am Post subject:

I don't know about the casting machined engine, but it does look nice apart from the colour!
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Wallace · Posted: Mon Feb 18, 2008 7:21 am Post subject:

Nice one

Really looking forward to this project developing.
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MooseMan · Posted: Mon Feb 18, 2008 8:08 am Post subject:

That hull's a beauty - I'd say the Modeen would be perfect for something that size.

The "castings" engine you're looking at is double-acting, but not self-starting - it would have to be a twin for that. Doesn't Clinton "Steamyman" have one of these?
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mogogear · Posted: Mon Feb 18, 2008 4:08 pm Post subject:

Thanks Moose and all- So double action is in reference to the exhausting action - that makes sense...

Ok we will see if Steamy likes his - Then when and if I decide to assemble a engine it could be a possibility.

I am not a machinist - so the plain castings kit is not in the cards..
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regards,

Mo

This week I are His Most Noble Lord Mo, the Apocalyptic of Old Tonbridge Wafers

steamyjim · Posted: Mon Feb 18, 2008 9:06 pm Post subject:

No double acting refers to steam being admitted on both sides of the piston

A double acting twin will self start

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mogogear · Posted: Mon Feb 18, 2008 10:08 pm Post subject:

THanks Steamyjim- Now I have it. I am quite adept at internal combustion engines- steam is so new to me that I want to be careful I understand terminology. Pressure forcing the piston back up as well as down makes great sense as a more powerful and consistent stroke.

So there is double action single pistons -

single action single pistons

and the same two versions in twins- I assume. The key in twins -s the offest power stroke of the two pistons make it self starting... Am I close on all of this..?
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regards,

Mo

This week I are His Most Noble Lord Mo, the Apocalyptic of Old Tonbridge Wafers

MooseMan · Posted: Mon Feb 18, 2008 10:36 pm Post subject:

Spot on. In a double acting twin the stroke will be offset 90 degrees, so that the flywheel is always commencing a powerstroke (no TDC or BDC).

In a single acting twin the stroke will be offset 180 degrees, which gives the best balance - power stroke matches the exhaust stroke. Of course this configuration does have two dead centres, and can't be reliably self starting.
_________________
Stands the glass half empty,
Or stands the glass half full?
Blast your Buddhist mantra, man,
I'll take another pull.

mogogear · Posted: Tue Feb 19, 2008 1:07 am Post subject:

More evidence of this forum encouraging my money to leave my bank account- I followed yet another piece of advice- upgraded my no-name rotary tool- to a Dremel -

the latest of course ( 400) with the cable and planning attachment and various such things-

The great news is that Home Dep@t had forgotten to take off the sales tags and the kit was "still on sale price" and the kit had been upgraded to boot...$59 for the $129 model-------- I wasn't even pushing for them to honor it.... But I didn't argue about it when the guy offered...

Monday - A GOOD day! Let me at those boat hulls!
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regards,

Mo

This week I are His Most Noble Lord Mo, the Apocalyptic of Old Tonbridge Wafers

Cranko · Posted: Tue Feb 19, 2008 5:41 am Post subject:

Excellent craft , well done

Les · Posted: Tue Feb 19, 2008 7:25 am Post subject:

Nice one.

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Les - Old age isn't so bad when you consider the alternatives.

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MooseMan · Posted: Tue Feb 19, 2008 7:49 am Post subject:

59 bucks for a Dremel 400

Nice one!

_________________
Stands the glass half empty,
Or stands the glass half full?
Blast your Buddhist mantra, man,
I'll take another pull.