toy
_ ::::::: _
(_):::::::(_)
! !: WAX :! !
!_! :::::::!_!
(/////////// Rubber Band /////////////////////)
! ! ____________________________ :::::::! !
! !:::::::! !
! !:::::::! !
! !:::::::! !
! ! ! !
! ! ! !
! ! ! !
! ! ! !
! ! ! !
! ! ! !
!_! <-------- matchsticks -----------> !_!
The Wax block is a slice from a 0.75" diameter wax candle with a
hole bored through it for the elastic band. The wax slows down the
untwisting of the elastic band and makes the Tank crawl.
The trailing ends of the 2 matchsticks provide the traction and keep
the Tank moving in a straight line.
Notches cut into the flanges of the thread spool give the Tank grip
for climbing.
Getting the correct length of elastic band ( or wax slice thickness )
is important for good tank action.
The Tank is wound up by using your finger to rotate the matchstick
at the wax block end. Wind it as tight as you like - if you have
plenty of spare rubber bands :-)
Have fun folks !
Source: https://ascii.co.uk/art/toy
