?you must used a tank first of all to put the carburetor cleaner inside
early prototypes involved something of that nature but the one in the video actually has the carburetor cleaner can on the robot. I works great because when one is empty you just replace it with another of the self

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As far as dispensing the fluid. early prototypes involved a small solenoid valve but this added a lot of weight and i couldnt control the flow very well. Final design uses a 4" long aluminum rectangle bar as a lever with a standard size servo. Now i have flow control and it is very light weight. see pic
if u can pls link us where did u buy the parts for making the flame thrower!ty
I made this a while ago and the project was poorly documented and robot has been parted out and turned into other things muhhahahaha! However, i have a ton of pics and make a slide show vid in a sec if you want as well as answer questions. off the top of my head for the thrower i used:
-bernzomatic pen torch
-el cheapo portable barbecue lighter
-heat sink i found in a old car stereo
-a feed roller from a printer
-some perforated steel grill from an old stereo housing
-tip from a Lincoln wire welder
-scrap pieces of aluminum and a couple 4-40 screws
I've been working on a slightly larger robot

(hint hint, as you will all see) and will be making a bit of a larger flame thrower so stay tuned!