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Foam pistons

Post questions and info about pneumatic (compressed gas) powered cannons here. This includes discussion about valves, pipe types, compressors, alternate gas setups, and anything else relevant.
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Unread postAuthor: jackssmirkingrevenge » Wed Oct 03, 2007 2:39 am

Nothing's machined, I used a hot wire cutter to slice the foam into sheets and cut out the rough shape of the profile to make the two halves. I then formed the outside contours with rough sandpaper getting progressively finer, hollowed out the insides to leave a 1mm thick wall then glued the halves together and did some fine finish. This process was used for both the fuselage and the engine nacelles. Wings and tail are made from 1.5mm thick sheets.
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Unread postAuthor: flamerz14 » Thu Oct 04, 2007 9:27 am

1.5mm sheets?? :lol: i only have like 30mm sheets and boards with me :D
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well, this isn't much isn't it?

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Unread postAuthor: jackssmirkingrevenge » Thu Oct 04, 2007 9:28 am

flamerz14 wrote:1.5mm sheets?? :lol: i only have like 30mm sheets and boards with me :D


me too, but if you string a hot wire across a flat surface and slide the board through, you can get sheets at almost any thickness you want ;)
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