Single pipe silent Pop Pop boat My Second Pop Pop (Putt Putt) Boat 1 day ago   12:15

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GrandadIsAnOldMan
Single pipe silent Pop Pop boat SHORTENED VIDEO

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Main Components
-
Aluminium tube
Pressure gas capsule/bulb/canister (empty OBVIOUSLY)
Tea light or candle
Styrofoam

Some history on Pop Pop boats you look at this Wikipedia link on the subject http://en.wikipedia.org/wiki/Pop_pop_boat they have been around since at least 1891 when a patent was filed by a Frenchman named Thomas Piot.

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.

Pop Pop boats playlist https://www.youtube.com/playlist?list=PLA5a2xPRSrB2M0m754LkqMXQFwFRAS3HK
Toy Boats playlist https://www.youtube.com/playlist?list=PLA5a2xPRSrB24vUS9E8zkSgjZysEL00zr
Daryl Foster devotes his channel to Putt Putt boats and here is the first one on his channel also back in 2009 https://ai-tube.com/videoai/4Gmujsvg6rH
Daryl Foster's last pop pop boat video https://ai-tube.com/videoai/1lLIUsokX9t
Here is the link to DaveHax tutorial which I found excellent https://ai-tube.com/videoai/0xv9Xgn8t14
sciencetoymaker has a full step by step tutorial series on putt putt (pop pop) boats starting in January 2009 with episode 1 here https://ai-tube.com/videoai/2MS0zwehNkZ
Here is a good video on tweaking the speed of these boats https://ai-tube.com/videoai/C2foFX79r4t
This link that explains the general annealing process without getting too technical http://steamshed.com/annealing%20process.html and here is a YouTube video on the subject by George Goehl https://ai-tube.com/videoai/3wFm11ym8ZN

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Comments 24 Comments

Raggy Ragsdale
COOL! Raggy
Atomic Shrimp
Heh - you beat me to it - I picked up one of those gas canisters off the pavement last week and I was planning to use it as the boiler on a boat!
anthony belcher
Great job
ufoengines
Cool Post . Thanks . Have you ever been into this steam turbine model boat thing https://ai-tube.com/videoai/w6qkvaQYJlb   I had a book on the idea and it seems to go back to the 1930's .
Tonik
I would be inclined to drill a hole in the cylinder at the sealed end to make filling easier. Then use a self-tapping screw to close the hole for use.
thehappylittlefox aka benji
that was an interesting one ! you could try making yourself a test track of sorts with a length of guttering and use that as a trough your boats will have to be a bit narrow though just a thought or have you already done that !
Joshua Cyrus
You should make a driveable pop pop boat.
Slider2732
The way it suddenly revs up is very cool. Enjoyed that :)
Doc Ink
cool idea with the co2 canister, I was thinking of making a single tube boiler because
i though my .25 copper tube was too big but you make a good point about the air getting trapped which I didnt consider. I like your inner "straw" if its long enough you can suck the air out..
John Walker
I think I have to agree with you. I don't like this design either. But it has great potential and you should go on with it grandpa!
Tommy enoch robinson
Nice upload after seeing your enthusiasm with putt putt boats I'm going to have a go, that was a brilliant idea using the soda bottle co2 gas canisters I'm thinking of drilling a hole in the top and using a seal screw to ease filling the heater tank up. Thanks for the interesting upload.
William justice Cj
Nice video
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My Second Pop Pop (Putt Putt) Boat Single pipe silent Pop Pop boat 1 day ago   08:18

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This is my second attempt at a 'pop pop' boat and even simpler to make than the first one. For the boiler I used an air freshener metal refill capsule. I think it is aluminium, it is certainly quite a soft metal. I made sure it was empty before I started working on it by discharging it in my sink so that I could wash away any remains. Please read the warnings on the instruction label as mine warned of flammable and irritant contents, so you don't want to do this near a naked flame and you don't want to get the contents on your skin or in your eyes.
I drilled a suitable hole straight through the existing plastic valve and found it made an air-tight fit for my drinking straw. As I am only using 1 straw for the 'exhaust' I realised it would not be possible to fill the boiler with water by pouring water straight into the straw as there was nowhere for the air inside to escape, so I pushed a second thinner straw inside the first straw to squirt the water in and the air escaped through the gap between them.
The hull is made from a fruit juice carton or tetra pak as they are commonly known.
The boat is virtually silent compared to normal 'pop pop' boats because the boiler does not expand and contract but the principle is the same.
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.
If you watch the video closely you can see the water moving in the straw.

Components
-
Fruit Juice Tetra Pack carton
Air Freshener metal refill capsule
2 drinking straws, one thinner so it fits inside the other
Small amount of Blu Tack
Sticky tape
Tea light or candle

Tools
-
Drill
Scissors
Hobby Knife

Here is Leo Spruch's version https://ai-tube.com/videoai/WCTs5a4uZzj

In response to some of the comments received since I uploaded this video I suggest that if you want some history on Pop Pop boats you look at this Wikipedia link on the subject http://en.wikipedia.org/wiki/Pop_pop_boat they have been around since at least 1891 when a patent was filed by a Frenchman named Thomas Piot.

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.
If you watch the video closely you can see the water moving in the straw.

Here is the link to DaveHax tutorial which I found excellent https://ai-tube.com/videoai/0xv9Xgn8t14
sciencetoymaker has a full step by step tutorial series on putt putt (pop pop) boats starting in January 2009 with episode 1 here https://ai-tube.com/videoai/2MS0zwehNkZ
Here is a good video on tweeking the speed of these boats https://ai-tube.com/videoai/C2foFX79r4t
Daryl Foster devotes his channel to Putt Putt boats and here is the first one on his channel also back in 2009 https://ai-tube.com/videoai/4Gmujsvg6rH
My Pop Pop boats playlist is here https://www.youtube.com/playlist?list=PLA5a2xPRSrB2M0m754LkqMXQFwFRAS3HK
Here is my Toy Boats playlist https://www.youtube.com/playlist?list=PLA5a2xPRSrB24vUS9E8zkSgjZysEL00zr

I have thousands of videos on YouTube covering a wide range of subjects. To find them follow my search guides https://ai-tube.com/videoai/prOFBbBUptj or https://ai-tube.com/videoai/Mw4HtjxjLEx or see my playlists page https://www.youtube.com/user/GrandadIsAnOldMan/playlists?flow=grid&view=1
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