Ok, i've made a structure out of aluminium foil because my sister (18) said that her teacher in year 11 told her that it is much easier to make the skeleton out of foil than to just make a ball and making it hollowbut now i am not sure what to do nextdo i still put a hole in the botom so that it does not clow up in the kiln? or will putting a hole into the foil make it melt and then blow up? pls help me! the rest of my class will be angry if i blow my piece up all over their's!!!!the foil is a way of making it hollow and light without having to make the shape and then cut it, make it hollow and then put it back again, which i already tried 3 times and failed.
the only way you may be able to have that fixed would be bringing it to a macine shopbecause if is not fixed correctly it would wear funny in your cylinder or it might not combust the fuel correctlyyou might find it cheaper, easier, and safer just to replace the pistonGood luck John
As aluminum melts around 1200 F it should melt in the kiln for firing, which means it will change it's volumeAlso you probably don't have solid aluminum in there but a lot of air too and the air will expand a lot when heated and consequently will need some place to go toSo you should have a hole connecting all your interior spaces to the outside worldPutting a hole into the foil won't make a differenceDiscuss it also with your teacherYour teacher is there to be asked questions like thatThat what a teacher is paid forIf you are worried about your piece blowing up you could build a wall of fire bricks around it to separate it so from other pieces.
Its easier to get parts now then 30 years ago If chunk thats falls of that skirt !!!!
you can get your parts from British Cycle Supply,I deal with them all the time or try Rask Cycle they both have web sights that piston is trashWorst case scenerio you go to a machine shop and have one made.
