:+1: :+1: Delving into new fieldsā¦. 
Thats going to be one big boat as I see your using a 45Kg gas bottle for the mold. Did you get a discount on a truck load of clay?
I may be crazy, but as you will not need it to deal with implosion pressures would it be easier to build it out of fiberglass or even carbon fiber?
it would be cool to have the (im assuming search lights) be water cooled.
heck get fancy and use the led(s) to make steam which drives the prop?
yes I know, crazy
you mean ādivingā to new depths.
more like sinking to new depthsā¦.
As long as the truck is also scaled to Jack-size, it shouldnāt cost too much 
The body-stamp might not work yet, so Iām still open to ideas 
Jack has been working really hard on the light engine, & he let it slip that it would in fact, be water-cooled :nerd_face:
You got it working! Iām already sold to this build Fantastic!
Thanks!
I was sure it would work.
ā¦Then I wasnāt sure for a whileā¦
Then it worked! :partying_face:
Oh the trials and tribulationsā¦.
Wow! I initially thought the āboatā part would just be aesthetic. It actually propels forward! 
Just thinkingā¦ might be more efficient with vaping coils, vs LEDs, no?
Definitely be more efficient, good idea - never thought of that.
Thereās no doubt other methods as well, but my goal was to use the otherwise wasted heat from the LEDās.
The claim to fame of this build is precisely that the propelling energy comes from waste heat from leds, and Iām looking forward to see where the waste light from the propulsion will go to
I agree on both points! 
Great build FmC!
I wonder if one could power a fan to cool the flashlight with an steam engine that runs off waste heatā¦.probably with a coolant that has lower boiling point than water. I guess it would be bulkier, costlier and less reliable than battery-powered fan, but almost as cool as a boat.
If you ever want to sell Jack let me know. ltp and I both made boats from sardine cans with a similar engine to yours in Secondary school. Love the creativity in yours. 
Small update at the bottom of post #3.
I tell you what... I'll loan him out all next week if you like, as I'll be over in the US for Drag Week.
I don't really want him messing with the build when there's no one around to keep an eye on him. Who knows what he might get up to???
I hope you just make copies of boat hulls with the rubber molding stuff. :person_facepalming:
Jack in your pics above reminds me of Buster on Myth Busters. Poor Jack.
Do you think if Jack come over for sleepovers that he would like to play rough with the sacked assistants?
Lol, would he have a choice in the matter? :partying_face: