foam problem?????????

[Tom10331]

Hey im sort of new at this and I was wondering how do you shape the foam into what you want??? plz help



Thx

[GWS CHEN]

Applying sharp knife on it would be easier.

Chen

[Tom10331]

I tried it but I still cant get any smooth corners, and it's full of edges. :(

[Ed Doyle]

Go to the search engine and look for "Hot Wire" cutting.

try this site www.charlesriverrc.org/articles_foam_vac.htm

or this one http://www.rcgroups.com/forums/showthread.php?t=191128

Be careful not to burn yourself, that wire can be dangerously hot and be aware that the fumes can be toxic.

Ed

[steve wenban]

Hi guys just passing saw your plea for help and thought I'd offer some help if needed
Firstly what foam are you talking about EPS,EPP,Dow blue foam??
secondly what are you trying to shape a wing or a fuse ? armed with answers to these question I may be able to point you in the direction needed .
SteveW
just passing from the Australian forum

[GWS CHEN]

Sand paper, sharp knife and electric Hot Wire could work on it, but
the safer way would be applying sand paper and knife.

Chen

[steve wenban]

here ya go drawing a bit rough but I did it in a hurry pretty self explainitory really
SteveW

[Tom10331]

steve im using EPP foam

[steve wenban]

the system Ive drawn is the one I use and it cut EPP EPS and Blue Dow without problem. EPP like to be cut a little colder and slower than EPS other wise it weld itself back together as the wire passes though due to is density and slower cooling abilities
even cutting slowly you get whats called cobwebbing but that easy to rub off.
Hope it helps.
SteveW

[Tom10331]

thx steve it helped a lot, though it took me a bit to put it together :-)

[steve wenban]

keep going it takes a bit of practice but once you develop your technique you'll wonder what was so hard :)
SteveW