Single Pipe no Boiler Pop Pop Boat - proof of concept
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- เผยแพร่เมื่อ 27 เม.ย. 2019
- Single Pipe no Boiler Pop Pop Boat - proof of concept. More work could be done, probably simply a better heat source. I was inspired to try this after reading a conversation in the comments on this instructable (You have to find the comment by RocketManDave and then read the replies made to that comment by LetsBuildOne and dcanada (Daryl Foster))
www.instructables.com/id/How-...
also worth a look at this one
www.instructables.com/id/How-...
Main Components
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1/4 diameter copper tube
Scrap foam hull
Hot glue
silicone tube
Syringe
Water
Some history on Pop Pop boats you look at this Wikipedia link on the subject en.wikipedia.org/wiki/Pop_pop_... they have been around since at least 1891 when a patent was filed by a Frenchman named Thomas Piot.
Steve Mould's excellent "explainer" video - Pop-Pop Boats Are Weirder Than You Think • Pop-Pop Boats Are Weir...
OLD explanation on HOW DOES IT WORK?
Water in the boiler is turned to steam. The steam has a greater volume than the water so it pushes out of the boiler and down the tube. In the tube it cools, condenses and contracts so it is drawn back into the boiler and the process repeats. The action of the steam pushing into the tube pushes the existing water in the tube out the back and that drives the boat forwards. The steam condensing and contracting draws water back into the tube ready for the next push.
If your next question is "why doesn't the boat oscillate backwards and forwards due to this push-pull effect?" try blowing a candle out and then try sucking a candle out and you will see the blow is fairly directional but the suck is not.
Daryl Foster devotes his channel to Putt Putt boats and here is the first one on his channel also back in 2009 • Part 1 Canadian Putt P...
Pop Pop boats playlist • Pop Pop boats
RC Pop Pop boats • RC Pop Pop boats
Here is the link to DaveHax tutorial which I found excellent • How to Make a Simple P...
sciencetoymaker has a full step by step tutorial series on putt putt (pop pop) boats starting in January 2009 with episode 1 here • Part 1 Build a Putt Pu...
Here is a good video on tweaking the speed of these boats • Part 25 Build a Putt P...
This link that explains the general annealing process without getting too technical steamshed.com/annealing%20proc... and here is a TH-cam video on the subject by George Goehl • Copper Annealing
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You had a Eureka moment... amazing stuff as ever.
😍👍Thanks
This is so cool! Much clever design! :) The pipe's "belly" should be a bit more curvy, because the water should stay that region for condensation, or the heating point should be placed backwards a bit.
Yes, I gave it a gentle curve but I think a little more would have helped.
WOW...Awesome stuff!⛵ 🚣
Wow amazing I’m gonna make one. Thanks again and well done 👍🏼
The main problem is getting water into it. In the second part of the video when it was in the bath it wasn't running as well as it did the first time and I think that is because some of the water escaped when I transferred it from the sink.
Love the steam boat. It works really well.
Thanks
Nice design, I haven't seen a pop pop boat like that anywhere else. The single pipe ones all had a boiler.
Well the pipe is the boiler, it is just not a separate component. It is really just the same as the coil boilers with one end sealed off. The problem is getting water into it.
Whenever a pop pop works well and then stalls it is because you have too much heat. It was running strong in the sink with the new unmelted tea lights. In the tub the big candle was too hot and I think it would be better nearer to the tip. You may have even run the boiler too low. That would explain the reduced performance later on when the candle was in a better position. The fairly extreme oscillation in the sink may have been due to overfilling the boiler. You want a little air in the system or a noisemaker membrane to absorb some of that bounce. That way you get pulsed forward motion but no backward bounce. Based on the performance in the sink I have to call this a surprising success! A little refinement will definitely produce a very good motor. I have visions of 4 or more of them side by side.
I guess you will just have to make one with 4 pipes, so you can try it out 👍
Nice design only tube Nice👌
Thanks 😊
huston , we have putt.:)
very elegant.
Thanks, I do like pop pop boats, haven't done one for a while now. There is more information in the video description 😁👍
Thank you for video
Glad you liked it 😁
nice one
It was interesting to see if it would work 👍👍
@@GrandadIsAnOldMan indeed
Can I place 2 pipes parellel to speed the boat?
I am sure you could but this was just an experiment to try it like this. You will find lots more pop pop boat designs in my playlist. The link is in the video description. It includes many videos by Daryl Foster who is an expert in this field.
Interesting!
Glad you think so!
working well you could you try two pipes ?
You certainly could but then it wouldn't be a single pipe experiment. What I would like to do if I find another handy off-cut of similar diameter pipe is do a U shaped design or perhaps we could call it an "uncoiled coil" boiler. The main issue is I hate paying the price for copper pipe so it will only happen if I come across another bit of scrap like this.
@@GrandadIsAnOldMan yes it would not be a single pipe experiment I was thinking of another single pipe alongside with no actual connection other than the heat source yes copper piping is getting expensive at nearly £4 a meter !
@@thehappylittlefoxakabenji8154 yes £4 is about 4 times my target price for a project. Just spotted some on eBay at £3.69 for a 1m coil including postage. Add that to Mike Flight's idea of an induction heating power module at around £6 (plus a very expensive high power 3S LiPo battery) and it soon add up but it would be a fun project. Sadly that will just be a "pipe" dream for now. A few thousand more views per video and we might make some progress.
@@GrandadIsAnOldMan yes it is expensive I find that a lot of my projects can cost way more than I could buy something off the shelf like that demagnetiser I made I priced up a power supply plastic case with postage & small handling charge it came to nearly £15 !
this debunks the ones who say that pop pop boats have 2 tubes because one "sucks water" and the other "pushes steam"
You might like Steve Mould's video on Pop Pop boats th-cam.com/video/3AXupc7oE-g/w-d-xo.html
@@GrandadIsAnOldMan yes, Ive seen that one
Its a 2 stroke steam engine
the art of trying to simplify by complicating ;D
Hello Helder 😊
Looks like it'd be happier with two pipes.
Why would that be?
@@GrandadIsAnOldMan
Comparing videos of the two pipe version to this single pipe, it's clear that the two pipe version is much peppier. A lot like engines with two valves per cylinder compared to similar displacement engines that have 4 valves per cylinder.
@@goatsinker347 so you haven't actually built one yourself? You may find the video description helpful. I did make it fairly clear why I was doing this, in the voice over. You will also find links to my other pop pop boats.
@@GrandadIsAnOldMan
Yes-yes. You built it to prove a single pipe/no boiler concept. Very good! Awesome.
Yes i have built them. Ones that my kid could sit in. Powered by propane and a homemade burner. This was back before youtube existed. My comment earlier was just to say, your little boat would put along faster with an extra pipe/engine.
this clears the doubt that there is cyclical effect or not... clearly it is oscillation.
I think there is a resonant frequency at which it works most effectively.
Show
why fill the pipe in such hard way?
Is there another way?
The pipe needs to be filled but then sit with the open end below the water surface.*
If the open end is exposed to atmosphere,then the air runs in,and the water runs out.
The pipe BELOW the water line is cooling the water/vapour IN the pipe until it contracts enough that it recedes back into the heating area.
*holding the whole pipe underwater to expel the air in it is way more fiddly and unreliable,as you then have to clip the pipe into place on the boat WITHOUT disturbing the water.
I am looking about for a longer pipe.....bend it double,then make a P shape as he did here.
This would give you 2 outlets(one needs to be shorter but parallel to the long one)
Boat will stall if the pipe BELOW the waterline gets too hot.
the shorter pipe will cause a pressure imbalance,thus encouraging a flow bias inside the pipe itself.
Note when in expansion....the pipe output is directional
when in contraction....water entering the pipe is NOT directional
This drives the vessel forward from the thrust from either pipe.
@@boogieknee3781 I am not sure if you have actually tried filling a closed pipe with water. Water will not flow into it because the air inside cannot flow out at the same time. If you use a longer pipe and have two outlets, then for filling purposes, the water can flow straight in one and the air out of the other. A simple coil works very effectively, here is one of my examples th-cam.com/video/i9Zc33gdrbM/w-d-xo.html As for creating a pressure imbalance, why would you even want that? The water does NOT flow in one pipe and out of the other during operation, It is effectively a closed system, with the steam pressure pushing the water equally in all directions. There is NO water flow THROUGH the boiler. You will find more information and related links in my video description.
At first I thought it was a worm
🐛😁👍
Thanks for the reply 🙃🤠
Atomic Shrimp send me here
Thanks for the visit. Atomic Shrimp is a great guy 😊