Styrofoam Pop Pop boat How to Make Steam Engine | DIY Tutorial 1 day ago   08:16

Styrofoam Pop Pop boat

Daryl Foster's last pop pop boat video

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Main Components
Aluminium tube
Aluminium drinks can
Tea light - at least 4
Two part resin Glue
Scrap foam

Some history on Pop Pop boats you look at this Wikipedia link on the subject they have been around since at least 1891 when a patent was filed by a Frenchman named Thomas Piot.

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
Pop Pop boats playlist
RC Pop Pop boats
Toy Boats playlist

Here is the link to DaveHax tutorial which I found excellent

sciencetoymaker has a full step by step tutorial series on putt putt (pop pop) boats starting in January 2009 with episode 1 here

Here is a good video on tweaking the speed of these boats

This link that explains the general annealing process without getting too technical and here is a YouTube video on the subject by George Goehl

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Comments 10 Comments

Jonathan Gibson
Just subbed to your channel after watching Atomic Shrimp!
RC Lover san
Nice! After seeing this boat at the London Model Engineering Exhibition, I wanted to build one. Now I know how. ;-)
Mike Flight
Yip, that works and sounds brilliant. It's strange how it seems to go back as it goes forward, like a juddering motion. Maybe that's when it's sucking in the water?

I wonder how large those pop-pop boats could be made? Something big enough to use a gas burner, but then it could just blow up in your face and then you have to explain to the surgeon that you were making a pop-pop boat while he extracts the shrapnel from your face, so better to keep them small I suppose. :D
Doc Ink
It definitely pops along... I thought you had angled the pipes towards one side, at least that's how it looked in the quick glance I got. Directing the flow towards the middle of the bath and back should keep it running along the edge or you could curve the pipes and have it go in a circle
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How to Make Steam Engine | DIY Tutorial Styrofoam Pop Pop boat 1 day ago   10:57

How to make steam engine by yourself. DIY Tutorial for Everyone