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Moderators: Winston, aew
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| Author | Post | ||
| Gene Bodnar |
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  Registered Member #126 Joined: Tue Jul 21 2009, 11:20amPosts: 1776 | THE PITMAN ENGINES AND AUXILIARY ENGINE There are two mirror-image engines that control the rotation of the paddlewheel. I constructed them almost exclusively of basswood, except for the small dowels, which are bamboo. Dimensional fabric paint was used to suggest rivets and nuts. The finished structures were given a coat of black satin spray paint. The auxiliary engine, which is also known as “the doctor,” is constructed in the same manner at the Pitman engines. Note that I did not attempt to model these engines with all their details; I only modeled the basic structures and their most prominent characteristics. Gene    | ||
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| teleman |
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 Registered Member #1925 Joined: Tue Nov 29 2011, 05:32amPosts: 1394 | THAT JUST LOOKS FANTASTIC GENE!!! MAY I ASK ONE QUESTION? SINCE MOST OF YOUR MODELS ARE AT SUCH A LARGE SCALE, WHEN YOU DO THE FRAME WORK. DO YOU MOSTLY BUILD YOUR FRAMES FROM YOUR LATTICE OR BASSWOOD. I HAD A DISCUSSION WITH JEFF FROM HOBBYMILL ABOUT THIS. HE WAS NOT SURE IF BASSWOOD WAS UP TO THE TASK FOR SCALE MODELS OF THAT SIZE. MY OPINION IS BASSWOOD IS UP TO THE TASK. BECAUSE WHEN YOU MAKE THE INITIAL FRAMES, YES THEY ARE A LITTLE WEAK. BUT AS YOU ADD CLEAT. INWALES, ECT....THE STRUCTURE GETS STRONGER AND STRONGER AS THE BUILD PROGRESSES. THAT MY OPINION. I JUST THINK THAT THE MORE YOU W/W BASSWOOD THE MORE YOU LEARN TO W/W IT AND LEARN IT'S CHARACTERISTICS. THAT IS WHAT I HAVE LEARNED.... | ||
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| Gene Bodnar |
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| Registered Member #126 Joined: Tue Jul 21 2009, 11:20amPosts: 1776 | Mario, Thanks. I agree with everything you said about basswood. I've been using basswood for over 55 years, and yes, you learn a lot about. ANYTHING you can do with any other kind of wood can also be done with basswood. There are two exceptions: Do not make pinrails from basswood, and do not make masthead caps from basswood. Basswood is not strong enough to withstand the stress exerted by the rigging on these items. Otherwise, as you add more and more items to basswood frames, the model becomes more and more structurally sound and secure. A finished POF hull in basswood will probably withstand at least 100 pounds of pressure. Years ago, I had my young daughter stand on such a hull on its side -- no problem. Gene | ||
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| teleman |
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| Registered Member #1925 Joined: Tue Nov 29 2011, 05:32amPosts: 1394 | Thanks Gene, Wow provide better service then the USpost office!!! Ops forgot to mention like you said pinrails n mastcaps. what your saying is the obvious where we all know where the stress factor is greater. Boy if you took a picture of that little test of your, see a picture of your daugther standing on hull would be quite the site. imagine the kind of conversations we would have about basswood then... | ||
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| Gene Bodnar |
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| Registered Member #126 Joined: Tue Jul 21 2009, 11:20amPosts: 1776 | Mario, Actually, standing on the hull wasn't my idea. Harold Underhill in his "Plank-on-Frame Models" says it could be done easily, so I tried it, and it worked. However, I've never had the courage to wash dust and dirt off a model under running water in the bathtub, as he also recommends. Gene | ||
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| aew |
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Arthur  Registered Member #1929 Joined: Wed Nov 30 2011, 03:05pmPosts: 3037 | Gene: Those engines look superb! I assume the rods I can see behind them are the valve gear? They look so good I was going to ask if it's possible to actually rotate the paddle wheel,  but that did prompt me to ask a serious question. Looking at your overhead view, both cross-heads seem to be at mid travel. I would expect the crank pins to be quartered (one 90 degrees to the other) which wouldn't correspond with the cross-head positions. Is that the case? | ||
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| Gene Bodnar |
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| Registered Member #126 Joined: Tue Jul 21 2009, 11:20amPosts: 1776 | Arthur, Thanks. Yes, you are correct about the crank pins, and this will be corrected. You are the second person to point that out. No, the paddlewheel does not rotate. I have no mechanical aptitude whatsoever, so I am gratified that folks can actually identify parts in these engines. Gene | ||
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| teleman |
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| Registered Member #1925 Joined: Tue Nov 29 2011, 05:32amPosts: 1394 | Hey I did not catch that Arthur, thats a pretty good eye you got. Gene you have no mechanical aptitude what so ever!!!! Thats shocking. you mean there is something you do not know. I will have to right this day down in history. LOL! I don't care Gene because it sure does not hamper you from making some pretty awesome models man. Have fun.. | ||
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| Winston |
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Winston Registered Member #1 Joined: Sat Jun 13 2009, 02:08pmPosts: 2716 | Wish I didn't have that kind of mechanical aptitude! | ||
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| aew |
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| Arthur Registered Member #1929 Joined: Wed Nov 30 2011, 03:05pmPosts: 3037 | Gene: I'm with Mario; if you've got no mechanical aptitude, I'm even more amazed at the quality and detail of the models you turn out! It's only because of all the detail you've added that I actually looked so closely at the mechanism you were modelling. Winson: The problem with showing any mechanical aptitude is that it lets you in for the "Can you just.....?" | ||
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