Single Pipe no Boiler Pop Pop Boat - proof of concept

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))
https://www.instructables.com/id/How-...
also worth a look at this one
https://www.instructables.com/id/How-...

Main Components
-
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 http://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 Weirder Than You Think  

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 Putt Boats Water...  
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 Pop Pop Boat  

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 Putt/Pop Pop Stea...  

Here is a good video on tweaking the speed of these boats    • Part 25 Build a Putt Putt/Pop Pop Ste...  

This link that explains the general annealing process without getting too technical http://steamshed.com/annealing%20proc... and here is a YouTube video on the subject by George Goehl    • Copper Annealing  

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