Weekend Update 3/8/20

[Dave V]

Taking a break from my other ongoing projects to do a quickie: assembling the MTL Jimbo crane that came with the tie gons.

It generally went together well. I had to sand a bunch of excess material off the bottom of the body but my power sander made short work of it.

I also lowered the cars (well two of them) with BLMA trucks and body mounted 1023s which sad was all incredibly easy.

(Attachment Link)

That looks awesome.  Kinda sorta almost makes me miss my brief fling with modeling CR.

[dem34]

Not N scale, but I needed practice painting and decaling undecorated rolling stock. And I also needed something to run on local HO clubs and layouts. So far I have this bit of a Foob for the shell. Only attempt to match the prototype beyond superficial changes where to cut and fill the number boards.




The prototype seems to have been the only CNJ H16-44 to lack stripes. Which works out because the Bachmann shell seems to have been based off a Milwaukee road locomotive whose details interfere a fair bit with said stripes. Not entirely happy with some of it but I only spent $20 on the locomotive in it's entirety so no biggie in the name of not ruining my N scale undecs.

[Ed Kapuscinski]

Ok. Made some fixes on the crane. I wasn't happy with how high the claw sat so I made some adjustments.

These included making my own hydraulic cylinder. I'm much happier now.

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I also tried out some ghost white decals for renumbering my fleet of Atlas 90tonners. Not bad.

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[basementcalling]

Taking a break from my other ongoing projects to do a quickie: assembling the MTL Jimbo crane that came with the tie gons.

It generally went together well. I had to sand a bunch of excess material off the bottom of the body but my power sander made short work of it.

I also lowered the cars (well two of them) with BLMA trucks and body mounted 1023s which sad was all incredibly easy.

(Attachment Link)

Where are the well cars? Are they used to hold ties?

How about a shot of the lowered cars? Curious to see how much of a difference the BLMA trucks make and if it's worth $14 a car, 2 trucks @$6.99 ea.

[Ed Kapuscinski]

Lol. It's worth it. Also, that's $6 a pair.

[Iain]

I don't usually post work I do on the steamship here, but, I like the way today's project came out:

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We are in the middle of winter maintenance, and one of the tasks was to pull all of the gauges on the ship and send them in to be calibrated.  A steamship has a /lot/ of gauges.  Take however many gauges you may think, and add some zeros to the end (I kid).

Anyway, after they came back, I figured it would be a good time to shine them up, so I spent yesterday and today polishing gauges.  This particular one is for the low pressure receiver, hence why it is a compound gauge vs just a pressure gauge.

[peteski]

I don't usually post work I do on the steamship here, but, I like the way today's project came out:



We are in the middle of winter maintenance, and one of the tasks was to pull all of the gauges on the ship and send them in to be calibrated.  A steamship has a /lot/ of gauges.  Take however many gauges you may think, and add some zeros to the end (I kid).

Anyway, after they came back, I figured it would be a good time to shine them up, so I spent yesterday and today polishing gauges.  This particular one is for the low pressure receiver, hence why it is a compound gauge vs just a pressure gauge.

Looks nice and shiny.  But I have a question: If it was just calibrated, why does it show 1 psi, not zero?  It is not connected to anything.

[nkalanaga]

Good question.  My first thought was that it was an "absolute" gauge, and was showing the air pressure - one atmosphere, since it doesn't say PSI, as far as I can tell.  But since it's impossible to have more than one atmosphere of vacuum, that can't be the answer. 

[peteski]

Good question.  My first thought was that it was an "absolute" gauge, and was showing the air pressure - one atmosphere, since it doesn't say PSI, as far as I can tell.  But since it's impossible to have more than one atmosphere of vacuum, that can't be the answer.

I'm assuming that the vacuum side is marked in inches of mercury, so since the gauge is vintage, the pressure side is likely marked in PSIs.

[MK]

Me three thinking why it is showing 1 and not 0.

[Iain]

The port engineer told me it was something to do with their equipment, and both our compound gauges read 1 psi high.  I'm not up on the details beyond that.

[johnb]

[Spades]

Good question.  My first thought was that it was an "absolute" gauge, and was showing the air pressure - one atmosphere, since it doesn't say PSI, as far as I can tell.  But since it's impossible to have more than one atmosphere of vacuum, that can't be the answer.

It doesn't indicate what the units are, but I think you are right.  Piston aircraft manifold pressure gauge would indicate the ambient air pressure with the power off.  The purpose of that gauge is to measure vacuum of the induction system of the engine. 

[peteski]

It doesn't indicate what the units are, but I think you are right.  Piston aircraft manifold pressure gauge would indicate the ambient air pressure with the power off.  The purpose of that gauge is to measure vacuum of the induction system of the engine.

But in this case it is a combination gauge, indicating both vacuum and pressure. In this case ambient air being present at the gauge's inlet should have it show zero, since neither vacuum or pressure is present at the inlet. Inlet and ambient pressures are equal.  At least that is how I understand things, and that is how a similar gauge I have works.

[nkalanaga]

Interesting.  I didn't realize there were that many types of air pressure gauges, or that they used different units for pressure and vacuum.