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Old 09-06-2012, 01:20 AM   #291
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Re: '46 Chevy Shorty

My bus is so small I didn't see the need to route the air...just let it flow. Hey, it's only about 10 feet from the drivers seat.

And yes...pix are in order.
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Old 09-13-2012, 11:37 PM   #292
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Re: '46 Chevy Shorty

After bench testing the 6KBTU unit I sent it back. Just not blowing cold enough. Ramped up to the 8000 BTU model. Only slightly larger but I will be testing it's output and generator friendly status this weekend. Don't plan on installing anything until I see how well it works. We'll see how this one does and give a report.
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Old 09-14-2012, 10:22 PM   #293
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Re: '46 Chevy Shorty

Tango. 6K should have done it--must have been a faulty unit. I'd be happy with a 40K unit if I could fit it in that way I could make ice cubes anywhere in the bus I wanted and if I got too cold I could simply shut the thing off
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Old 09-15-2012, 10:50 AM   #294
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Re: '46 Chevy Shorty

Yeah Jack--- I figure it was most likely just not running up to snuff, but since the other, larger unit was only about an inch larger on two measures, why not "go for the cold". And the slightly larger box I'm building for it will also give me more future options. I had originally been looking at some nifty "low profile" units that are really are much shorter in height and would leave more headroom, but after calling around, I discovered that almost no one kept them on the shelf...all "special order" items so far. The strategy here is to go with a fit that will accommodate a wide selection of plug & play options down the road. Think "KISS" (the principal...not Family Guy's favorite rock group.)

Will probably start chopping up the roof sometime this weekend. I'm anticipating a little angst going in but imagine you must have had similar feelings when you took to makin' that great big 'ol hole in yours. Aw, what the hell...

Onward!
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Old 09-15-2012, 11:05 AM   #295
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Re: '46 Chevy Shorty

Tango, Cutting the hole wasn't a problem--it was when I realized that I'd have to figure out a way to fill it back in that the stomach flips started!

No dilly dalling now, we want to see that new A/C all tucked away by the end of the weekend, Ha!
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Old 09-15-2012, 12:44 PM   #296
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Re: '46 Chevy Shorty

its just sheet metal n a few braces...
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Old 09-15-2012, 02:03 PM   #297
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Re: '46 Chevy Shorty

Hey Jack --- how is the quality of the sheetmetal on your bus body. I'd swear my Wayne has steel that's 50% lead. Not at all like the sheetmetal used on the Chevy truck part of the body...or my old Blue Bird...or anything else I've worked on. Seems very low tensile. Maybe it's just her age, I mean my skin ain't what it used to be either, but ...
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Old 09-15-2012, 10:55 PM   #298
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Re: '46 Chevy Shorty

Tango, That is a hard question to answer. I get what you mean about half lead. the sheet metal on my Superior bus body does have that hollow ring to it as if it were lead and I'm pretty sure it hasn"t any carbon molecules mixed with it to allow for tempering etc. The metal is plenty thick (how is that for a quantatative description) and it is no problem working with it (where it is not rusted). It cuts, grinds and welds just fine--it just is awfully thick. I think the old school engineers made up for what they lacked in metalurgy with mass.

A characteristic of sheet metal that doesn't seem to have changed over the years is that nasty little razor blade that comes with using a carbide cutting tool on it. Like you, I trimmed off the skin on the side of my bus for replacement later on. Today I discovered a great use for the little razor blade left behind on the cut. I really don't need to go to the barber for hair cuts anymore--all I need to do is stick my head under the trimmed edge of my bus and look Ma, no hair--and no skin either (I'll have to adjust my aim a little) Oh well, not the first blood let on this two year??? project!
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Old 09-16-2012, 12:17 PM   #299
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Re: '46 Chevy Shorty

Jack --- your metallurgical analysis is dead on. Plenty thick with little tensile strength...flexes very easily. I could walk all over the roof on my Blue Bird with no problem...this sucker will cave in everywhere you put any weight at all. And I don't know about yours, but dialing in my mig below the burnout point has been a b!tch. Even worse if you are try to weld newer or heavier steel to it. Has me a little nervous about all the new skin I have to mate to old. Have a feeling that "oil canning" is going to be difficult to control. I've been told that the best insurance to limit it is to heat the panels to about 125 degrees with a torch or heat gun, then tack'em in place thoroughly before they cool so they pull taut as they shrink back. Any thoughts or ideas you've heard in that area?
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Old 09-16-2012, 02:37 PM   #300
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Re: '46 Chevy Shorty

one can kinda tell the steel composition with the hardened and spark tests which are easily done.
for other steel, etc use the machanist handbook.. esp the 1940 one like i have for the old stuff...
most early sheet steel used was low carbon.
i think the first stardards for steel were a little after the turn of the 20th century, but i havent looked in my book to see what the 1930's numbers for sheet metal are.
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