Part 19 Build a Putt PuttPop Pop Steam Boat s16 glue bendy

[frankygrime]

Could I use a instant glue instead of hot glue ?

[sciencetoymaker]

@frankygrime It might work if it is stiff enough to make the bendy part rigid

Slater

[TheShezinator]

My glue-gun won't heat up!

It's been 30 seconds now and nothing.

[sciencetoymaker]

@TheShezinator Cool your jets! It takes 5 minutes or so.

Slater

[kippylyricsvideos]

can we use the epoxy instead of glue gun? :))

[sciencetoymaker]

@kippylyricsvideos Yes

[tomalotube]

im just gonna leave this here:

if you have a high power glue gun, you can use it BEFORE its fully heated. Apply glue once the gun is just hot enough to squeeze the glue out. I did this with a 60w and my super thin staws are fine

[sciencetoymaker]

@tomalotube Yes, using a high-powered glue gun before it fully heats up might keep you from melting holes in the straws.

Slater

[allenslayer]

sorry my brother typed it 

[allenslayer]

borring

[usermanefer308]

Can i use poxi in that part?

... because when im using the boat the glue gun melts :s

[sciencetoymaker]

@usermanefer308 Something is wrong if the glue melts at the bendy part of the straw. But, yes, you could use epoxy

Slater

[GLADIETOR]

why 102 mm and how did you reach to that measurement?

[sciencetoymaker]

@GLADIETOR The 102mm length of straw after the bend is based on anecdotal observation. It goes faster when i cut a little off. If i cut off too much, it stops working. I can only speculate why. Perhaps the extra length introduces extra friction?

Slater

[TOMREED1]

@sciencetoymaker I think (please correct me if I'm wrong), its due to the venturi affect that the engine requires the correct length of straw. Too long a straw will mean too much suction is required for the engine to suck the water back up into the boiler. Too short a straw will mean that as the steam is produced, it will be able to exit the end of the straw, thus loosing the negative pressure accumalated inside and stalling the engine.

[TOMREED1]

@TOMREED1 @sciencetoymaker (would not all fit into last post) The engine works because the water turning to steam rushes out of the straws creating a vacuum behind it as it cools and re-condenses to water again. This vacuum inside the boiler then sucks in more water and the process repeats. I have had some experience building pulse-jet engines that run off glow fuel and the same principles are applicable here.

[sciencetoymaker]

@TOMREED1 I don't know all the dynamics but I think, yes, too long would create too much friction in the pipe to work. If the pipes were too short the water column would not have enough momentum to set up the instability that alternates between high and low pressure. It would be interesting for someone to experiment with how long and how short the pipes can be.

Slater

[melason83]

if you have no proxy glue... can we use glue gun?????

[sciencetoymaker]

@melason83 The epoxy glue is used where the engine gets hot. You cannot use hot glue instead because the glue will just melt when the engine gets hot. Try to find epoxy.

Slater

[DeKatBe]

Would epoxy work to hold the straws stiff? I assume no, or else you would have said so, I am just wondering why... :)

[sciencetoymaker]

@DeKatBe Actually, epoxy would work to keep the straws stiff. But people seem to hate working with epoxy. Because--unlike the engine--the straws do not get hot, you have the option of using hot glue if you prefer.

Slater

[XxIVANxX95]

why didnt you just make one long video dan these short tuts?

[sciencetoymaker]

There is a 10 minute limit for YouTube videos.

[dumle29]

unless you are a partner.

i think you have the potential to get it

try

[sciencetoymaker]

@dumle29 I'm not looking to clutter my videos with ads at this time, which I understand is part of deal.

Slater

[dumle29]

ahh yeah thats right. when you are partners those comercial thingies comes. but its just as easy as clicking the x

[wys7980]

if u look on google there a hour 15 min vid

[the93flash]

can i use also silicone? it's more hard and secure for the high temperature for me

[sciencetoymaker]

Silicone is not strong enough to hold the arched shape. You could use it in addition to the epoxy to help seal the engine, but then you have to wait several hours for it to cure vs 10 minutes for epoxy. And if you have to add more, only silicone sticks to silicone.

Slater

[Blooberry95]

can i use hot glue for the can

[sciencetoymaker]

The metal part of the engine gets too hot for hot glue. By the time it gets to the bends in the straws, it's cooled enough to use hot glue.

Slater

[Blooberry95]

is white glue ok? just asking :)

[sciencetoymaker]

If you look at the package for white glue, it will say "water soluble" so water will melt it, and "for porous materials" which means it only works on paper, leather, wood, etc--not metal or plastic. So it won't work. In the introduction, I ask, people to follow the instructions exactly the first time.

Slater

[Blooberry95]

Alright thx! I'll see if I can buy some epoxy

[cozer28]

iz epoxy dat stuff u use for the can

[sciencetoymaker]

yes

[sergentpersonsballs2]

can i use epoxy instead of hot glue

[sciencetoymaker]

Yes, you could use epoxy instead of hot glue.

Slater

[nj4x4fever2]

I Used JB Weld Epoxy On This Part and it held the shape of the cardboard but it did take overnight to dry. and it holds the shape quite well.