right today after helping my neighbour wire up some lights in the back of his new recovery van i finished off the last roll of fiberglass on the big 'bastid' wall in Franny. then i measured up the sizes of visible roof panels not including cross spars. got some poly board the other day so i set about gettin cuttin.
Home Made Foot Operated Electric Hot Knife.
one day in physics lesson about 15 years ago, we was learning about basically Ohm's Law by recording current drawn thru constantan at different voltages and recording the temperatures i think! basically this wire got really hot without glowing red hot and melting.... i knew,even back then, one day i might need some so i acquired a roll! its called Constantan im sure. wicked stuff, strong and stupidly high electrical resistance! think could make heating elements from it???

anyways, got a spare car battery, some wire, a bit of metal from an old ceiling light and said wire.

i connected the wire to the + on the battery using the red protective cap to hold in place.

The handles were useful to hold - wire just above the terminal so i could press wire onto terminal with my boot. foot operated!

the other business end of the + i connected to 2 foot metal rod, constantan wrapped many many times round t'other end of the rod same as battery feed. i had approx 1 meter of constantan which i then connected to - wire. i could have improved on this by using 2 rods or better still like on scrapheap challenge some guy made a wooden L about 2 foot each arm.
Polystyrene board marked for cut i started to hot knife the line as best i could...

the hot knife effect gives decent edge and seals/quarterizes the cut. dont get those fekin balls everywhere !!!!

still its only as good as your hands are steady! lol

board cut, took out to van, slotted up in roof and then broke the fekin corner off cos i was a bit heavy handed and was slightly too long! DUUUUURRRRRRRRRRRR. still, wont see it when its finishhed so i wasnt too pissed off.
by this time it was gettin cold and dark so i called it a day..... stay tuned folks !
