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Post by Roger on Apr 30, 2022 8:30:12 GMT
On the Hottest of hot afternoons on the Bluebell I was invited to stand in the ENCLOSED cab of the Standard 4 tank. Quick visits by the crew braving the temperatures. I was melting but so enjoying. Then they moved her 100 yards. WOW. One of the quick visits saw one of the injectors operated. MMM. Then the next time. Yes he told. "The favorite is the one we can reach, not the one you have to get on your knees to open the water valve for!!" That told me. Do check on the scale place for the water valves and then go and fit an easy to get to one on the tender or driving trolley. Preferably sat in the water to prevent air bubbles. David and Lily. The water valves are tucked away in the corner of the cab, on the floor. They are easy enough to reach for me, but I imagine they must be a pain in full size. Maybe they can operate them with their foot.
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Gary L
Elder Statesman
Posts: 1,208
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Post by Gary L on Apr 30, 2022 9:00:28 GMT
On the Hottest of hot afternoons on the Bluebell I was invited to stand in the ENCLOSED cab of the Standard 4 tank. Quick visits by the crew braving the temperatures. I was melting but so enjoying. Then they moved her 100 yards. WOW. One of the quick visits saw one of the injectors operated. MMM. Then the next time. Yes he told. "The favorite is the one we can reach, not the one you have to get on your knees to open the water valve for!!" That told me. Do check on the scale place for the water valves and then go and fit an easy to get to one on the tender or driving trolley. Preferably sat in the water to prevent air bubbles. David and Lily. The water valves are tucked away in the corner of the cab, on the floor. They are easy enough to reach for me, but I imagine they must be a pain in full size. Maybe they can operate them with their foot. Yes, that’s how it was done. They were basically on-off and a kick with a fireman’s boot did the business. Not even a hard kick; on the pannier I visited they moved easily. It remains to be seen how easy to work they (it) will be on Paddington. I have one in the ‘scale’ position, and there wasn’t any choice about it, but I mounted the valve from the ‘tender’ supply at the back of the cab floor. The main thing is that it is easy to see when they are ‘on’, and that they are not too close to anything finger-burningly hot. The rear one at least will be cool. Gary
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Post by andyhigham on Apr 30, 2022 9:07:08 GMT
If you have enough tank capacity, leave the injector water valves open. Saves fiddling and helps keep the injectors cool
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Post by Roger on Apr 30, 2022 9:34:11 GMT
If you have enough tank capacity, leave the injector water valves open. Saves fiddling and helps keep the injectors cool You can leave the water on with the scale injectors I've designed because there's a valve on the overflow. It's not a perfect seal, so there will be a slight dribbling.
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Post by Shawki Shlemon on May 3, 2022 8:23:35 GMT
I think the best place to put the water valve is in the tank , no chance of air getting in .
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Post by Roger on May 3, 2022 9:30:40 GMT
I think the best place to put the water valve is in the tank , no chance of air getting in . Hi Shawki, Fortunately, the valves on 1501 are mounted on the underside of the tank. It's only the levers that are in the cab, on shaft extensions.
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Post by Roger on Jul 12, 2022 22:13:38 GMT
I've bought some blunt Syringe Needles for experimenting with the lining, and also for use with the oil can. However, the oil pressure with thick oil is sufficient to force the needle off the taper. This is obviously an issue with some Syringes because the needles have a flange with two cutouts that engage with lugs on the syringes on some sizes. This is the adaptor I made to take the blunt needles. the thread is M4.5 which is a bit unusual. It's shown as being unthreaded here. Syringe nozzle adaptor by Timothy Froud, on Flickr This is the 3d printed locking coller that engages with the hexagon on the above adaptor. This fits onto the adaptor first, and then the assembly is screwed onto the oil can nozzle... Syringe needle retainer by Timothy Froud, on Flickr ... like this. PXL_20220712_211933097 by Timothy Froud, on Flickr The syringe needle is then pushed on and turned to lock it in position. The back of the 3d printed lugs have ramps on them to engage with the ramps on the syringe flange so it pulls back tightly onto the taper. PXL_20220712_211846530 by Timothy Froud, on Flickr Simple but effective, this stays on nicely. Obviously this is easy to just swap the needle size to suit whatever is being oiled. I tried it out on the tiny volcano oilers on the connecting rods, and it works a treat. The only issue is that there isn't much room where those are, so I need to design a swivel elbow so that the syringe can be at any angle. I'll probably either buy shorter needles or just cut these down because they don't really need to be that long. Next, I need to design a little 3d printed holder to make the lining pen.
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Post by chris vine on Jul 13, 2022 10:56:34 GMT
Hi Roger,
To get round this problem, I soldered a couple of inches of 1/16" copper tube into the end fitting of my oil can. (same type as yours). You would need some thinner tube I expect.
No need for a complex swivel etc. You just bend the copper tube to suit. After a year or so, it still hasn't snapped off!!
It's a bit like the Nasa ballpoint pen which can write in zero gravity and a vacuum. Cost n millions to develop. The Russians used a pencil. Or so the story goes!!
Chris.
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Post by Deleted on Jul 13, 2022 11:16:35 GMT
As a possible alternative, medical needles are threaded...might be too fine but worth a try, certainly should work with low viscosity oils...just don't forget to blunt the tips..🤣🤣
Pete
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Post by Roger on Jul 13, 2022 11:45:54 GMT
As a possible alternative, medical needles are threaded...might be too fine but worth a try, certainly should work with low viscosity oils...just don't forget to blunt the tips..🤣🤣 Pete Hi Pete, That's what these are, but they're the blunt versions that you can buy from eBay. You can get them in a huge range of sizes as you can see from this chart.
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Post by Roger on Jul 13, 2022 11:48:50 GMT
Hi Roger, To get round this problem, I soldered a couple of inches of 1/16" copper tube into the end fitting of my oil can. (same type as yours). You would need some thinner tube I expect. No need for a complex swivel etc. You just bend the copper tube to suit. After a year or so, it still hasn't snapped off!! It's a bit like the Nasa ballpoint pen which can write in zero gravity and a vacuum. Cost n millions to develop. The Russians used a pencil. Or so the story goes!! Chris. Ah yes, but the holes in the Volcano oilers are only 1.2mm diameter, so you won't get a copper pipe in there. The needle goes through the hole so they can be filled easily. Anyway, you know what I'm like, I love creating this sort of stuff, it's great fun.
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Post by Deleted on Jul 13, 2022 12:48:07 GMT
As a possible alternative, medical needles are threaded...might be too fine but worth a try, certainly should work with low viscosity oils...just don't forget to blunt the tips..🤣🤣 Pete Hi Pete, That's what these are, but they're the blunt versions that you can buy from eBay. You can get them in a huge range of sizes as you can see from this chart. Nice range..my own medical needles are 0.25mm x 8mm.. they are available in many sizes like you say..
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Post by 92220 on Jul 14, 2022 7:35:49 GMT
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Post by 92220 on Jul 14, 2022 7:55:48 GMT
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Post by Roger on Jul 14, 2022 21:22:16 GMT
Hi Bob, You can get 14gauge ones from many sources on eBay, that's where I got mine from. I guess the really large sizes are for inserting things like microchips for animals. At the moment I don't need anything as big as that, but it's handy to know they exist.
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Post by Roger on Jul 23, 2022 21:14:27 GMT
The next step for the lining is to experiment with the blunt Syringe Needles that I bought for the various line widths. I've based this holder on the retainer that I made for the Oil Can. Lining pen assembly by Timothy Froud, on Flickr The needles are retained by two lugs when they are twisted. The idea is to use the tapered hole in the plastic part of the needle as the reservoir. lining pen syringe needle holder by Timothy Froud, on Flickr I'm not the first to try this. Here's someone on YouTube doing something similar. It looks like I'm going to have to thin the paint somewhat. I've designed a flat guide with undercuts on the edge which will be 3d printed from PLA. The idea is to heat it with a Hot Air Gun and form the shape around the wrapper. Unfortunately, the SD card reader on the 3d printer has finally given up the ghost, so I've just removed that with a hot air gun and ordered a new one.
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Post by Deleted on Jul 24, 2022 1:13:37 GMT
Hi Roger
Can the UJ joint be locked?.. if not you may find it very difficult to use as a lining pen?
Regards
Pete
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Post by flyingfox on Jul 24, 2022 6:38:09 GMT
Greetings, this is much the same system as the original Bob Moore pen and holder, details of which were handed out at a lecture at a 1970's M E Exhibition at Wembley, lecture. The pivot was locked by tightening the screw it pivoted on. Regards Brian B
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Post by ettingtonliam on Jul 24, 2022 7:10:28 GMT
Back in the early 1970s when we drew in ink on blue linen we lettered and numbered using stencils of various sizes A company called UNO (Ithink) made pens to fit the stencils which used a holder very similar to the one you show. I even appropriated a couple of them and used them to line out the 3" Wallis & Stevens Simplicity roller that I exhibited at the 1972 Model Engineer exhibition. I may still have them in the bottom of my box of drawings instruments, scale rulers, set squares and stencils, which doesn't get opened very often these days.
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Post by doubletop on Jul 24, 2022 8:37:48 GMT
Back in the early 1970s when we drew in ink on blue linen we lettered and numbered using stencils of various sizes A company called UNO (Ithink) made pens to fit the stencils which used a holder very similar to the one you show. I even appropriated a couple of them and used them to line out the 3" Wallis & Stevens Simplicity roller that I exhibited at the 1972 Model Engineer exhibition. I may still have them in the bottom of my box of drawings instruments, scale rulers, set squares and stencils, which doesn't get opened very often these days. UNO, Rotring and Staedtler Mars The black part with the needle fits into the blue outer part and the black cap holds it in place. The fit is such that the inner can slide up and down slightly. The cap has a hole in it for the ink to flow through. In use a quick shake would allow enough ink through. I'm guessing that without the inner needle, as Roger is proposing to do, the viscosity of the paint will act as the flow control. That is sort of what happens with the Beugler roller liner system. Found a video Pete
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