Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines
The Regular Stuff: Chat, Buy, Sell, Off Topic, etc. => General Discussion - Dynamos, Generators, Alternators, Magnetos... Scale Models, Toys, Originals, etc => Topic started by: MadeForThat on April 16, 2021, 01:35:41 pm
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alot of ingenuity to actually get one to pump water, well done !
Yes it is!
Some nice engineering here.
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alot of ingenuity to actually get one to pump water, well done !
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A little less busy version for the one I will give my dad for Christmas:[attachimg=1]
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I got inspired today and finally attempted soldering a tube into a 90° sharp bend I had been worried that it would restrict the water too much, but that was unfounded as it doesn't pump that much to worry about it haha! Fortunately I think I will be able to get this done before Christmas! Cheers Nick!
-Tom
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Thank you for coming back with an update!! 8)
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I would have shown this on steam for the first run, but the boiler I just purchased is rotted out, so the tarot stirling was used for the first test!
https://youtu.be/McPKQCREilM
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A great build thread.
You are making excellent progress.
Thank you!
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Meant to attach this pic too, you can kinda see the detail of how the mesh is held above the tray. Should be able to hold a fair bit of water under the gravel
[attachimg=1]
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Got a little bit more done. Not really to do with the pump, but a little toy to work with it. I printed out the little tray and trough, cut out some cross stitch plastic mesh, and plan to put some small gravel on it. Water should be able to fall through to the tray and get pumped back out. I also want to make the device that would hang from a pump that connects to a tube. Not sure what it is called, but I think it would be interesting to have this pump fill the trough [attachimg=1][attachimg=2]
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This is going to be a very and very unique accessory.
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Just wanted to say that I’m really enjoying this 8) Some very clever modding and I hope it ends up working 8)
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So the valves and Tee came in the mail today, so I went ahead and gave it a test run. It works great! the squeaker is pretty slow to refill, but that is okay, as I don't plant to use all but the last 25% of the down stroke, so it will have a good bit of time to rebound. I don't plan to put any kind of air ram in it, so the output will be pulsed. On the other hand I just realized I will be able to use this to keep pumping air into my fish tank if/when my power goes out.... I don't think I have ever had a practical use for any of my engines, so that is pretty neat lol. The second version of the pump plate is on the printer, just need to wait 2 hours...
[attachimg=1][attachimg=2]
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So yesterday over lunch I designed this little "pump" to fit in the base of the ertl. The sqeeker bulb will have a tube to a Tee on the far side of the base, where the check valves will be connected. I am planning to use these check valves: https://www.amazon.com/gp/product/B08GLXZJCW/ref=ppx_yo_dt_b_asin_image_o02_s00?ie=UTF8&psc=1
Mainly because they are small, but can be disassembled if they plug up. They are normally used for aquarium air lines to make sure siphons don't happen. The base I designed should hold the bulb, check valves, Tee and tubes and I will need to do a bit more planning for how the water will enter the base of the pump. I started the print when I went to bed last night, and woke up to a complete part. Unfortunately the squeeker bulb is too compressed when assembled, so I will need to either use a different bulb, or plan to put this project on another base to allow a little more room under it. Also, the bulb is centered under the "pusher" and this leaves no room for a little copper tube, so I will plan to move the bulb a bit to make room.
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That's a SWEET price for Ertl pump in a box!
I think the squeaker could last for some time if it is not depressed with a sharp metal object, maybe something like a dart gun suction cup or something soft on your vertical plunger as a cushion?
The squeaker will likely make good water pressure on the down stroke, I am unsure if it will have a lot of strength to draw in the new water so a check valve with very easy open strength will be needed. Are you going to make your own check valves?
Keep us posted if you make any progress.
I see the edge of a Tarot Stirling engine...nice choice! I have one on order myself :)
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Well I happened upon another pump at an estate sale, in the box! They had 20 and I talked them down to 10 with some dvd's! I modified one of Jin's hit and miss engines for my dad as a gift, and I think this will be the follow up gift for this Christmas :)[attachimg=1]
I also found a pump! Got some inspiration from my dog chewing a squeaker for a few hours. Not sure how long one will last before wearing out,but the squeezers are easy to press and should connect to some check valves pretty easily.
[attachimg=2]
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Well I happened upon another pump at an estate sale, in the box! They had 20 and I talked them down to 10 with some dvd's! I modified one of Jin's hit and miss engines for my dad as a gift, and I think this will be the follow up gift for this Christmas :)
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Seems like a relatively advanced set up your planning for here, will be looking forward to see you progress.
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As the others have mentioned really interesting.
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If you can make it pump with 3D printed parts...you could probably sell them! There are several of us on here that have Ertl pumps and they are good lookers, but more joy could be had if they lifted water!
I was going to have a go at it but have not had time to even take my pump apart.
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Ooooh…..very interesting.
Looking forward to seeing more.
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watching with intense interest , your on your way to something really special.
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So I have been getting into a modification of an ertl water pump, and decided that I really wanted it to pump. The modification to run on drive belt was quick and easy, but modifying the internals will be far more complicated. [attachimg=1][attachimg=2][attachimg=3][attachimg=4] I made a 3d model of the crazy part needed to transfer power to the bottom, and printed it out in a few minutes on a 3d printer. (I work as a tooling designer, so I just designed it on a lunch break) It was a little sticky, but after "wearing it in" it slides pretty smooth. I then drilled the spout out by hand, and each of the oil cups. My plan is to run a 1/8" copper tube up inside the pump up to the spigot, and my plastic part leaves just a little bit of room for that. I have not designed the pump mechanism at all, but I think I can make the pump from a spray bottle work. it will just need to fit in the die cast base of the toy. Anyone else tried to do this? id love to hear thoughts for how to make the pump under the base.