Trying a different Pop Pop boiler - Fast but no Pop!

[@AttilaBlade]

The silence one is better for the ears, the noisy for the kids. Sometimes the kid stay there in the old body. I like both of them. Nice boat Grandad! ;)

[@GrandadIsAnOldMan]

Thank you

[@Resonanttheme]

Not bad, I liked how it turns the corners too.

[@GrandadIsAnOldMan]

It was interesting to try epoxy to glue it together, but I used too much so there was no flex in the diaphragm to make the popping noise. So it worked fine, but almost silent.

[@rgbungee1420]

Hello im building one for a science project and at the end of the session my teachers wants us to race our boats, is it possible to put a rudder underneath the exhaust of the engine to make it run straight? and if it is, is it possible for you to make a video about it, Thanks Grandad!!

[@GrandadIsAnOldMan]

They tend to be so slow that a rudder has little effect. I would suggest two quite large rudders either side, rather than obstructing the exhaust.

[@GrandadIsAnOldMan]

It just occurred to me that you may not have seen the links in the video description to my other pop pop boats, including an RC one.

[@mikeflight9]

LOL. Don't know why it's not popping but that one is really fast. There is a type of epoxy resin and rubber sealant you can buy that is totally heat proof. I used the epoxy type on a 2 stroke glow engine and it held great. I used he sealant for the bottom and top of a Sterling engine and that worked perfectly too. I really need to get the finger out and try building one of these pop pop boats. :D

[@GrandadIsAnOldMan]

I think the glue is covering too much of the surface preventing it flexing. I have studied a few other similar boilers and they fold the top down over the bottom so I will do another some time.

[@kimjespersen5263]

please make a bigger pop pop engine :)

[@GrandadIsAnOldMan]

There really isn't much point in making them significantly bigger, the power does not scale up with the size. There are many different designs in my associated playlist here kzbin.info/aero/PLA5a2xPRSrB2M0m754LkqMXQFwFRAS3HK