Help: How to cut foam - properly

Started by PankajC, September 20, 2011, 08:16:57 PM

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PankajC

guys,

normally whether we cut foam with a knife or hotwire, it is very difficult to make a perpendicular cut. The problem is acute when the foam thickness increases to 10cm or beyond. In my case I need to cut 1.5" thick foam.

So the question is how does one make a neat perpendicular cut?
Spektrum DX6i | EP Pusher Trainer | EP CUB |

gbisht

Hi normal knife will not give you dizered result, use hot wire cutter.

First draw your parts on cardboard and cut 2 same parts
then with help of temp. glue or allpins attach cardboad shape and then cut it.

Can post pics pics if u wanna see
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PankajC

hmm, but for a 40mm thick foam, cardboard is OK?
Spektrum DX6i | EP Pusher Trainer | EP CUB |

gbisht

#3
Use cardboard or any thick thing. like box with smooth edges, and these things only for support dear,

unable to upload pics, check out following my Home Made Hot Wire Cutter Video

http://www.youtube.com/watch?v=tlGLv5gPnYM
HSP 1/10 Nitro Tyrannosaurus Off-Road Truck
Thunder Tiger 1/10 SSK V2 Nitro Truck with Radio
HK-300 3 Channel 2.4ghz FHSS Ground Radio
Turnigy 9x 8-Channel
HK-250GT

AEROVISHWA

i would suggest u to use a surgical knife....! they are damn sharp.! cuts foam like soft butter..

instead of cardboard use thin cheap ply..!( easy to cut and hard)
Aerodynamics are for people who can't build engines.
-Enzo Ferrari

https://sites.google.com/site/vishveshkakkeri93/
HAPPY LANDINGS

gbisht

HSP 1/10 Nitro Tyrannosaurus Off-Road Truck
Thunder Tiger 1/10 SSK V2 Nitro Truck with Radio
HK-300 3 Channel 2.4ghz FHSS Ground Radio
Turnigy 9x 8-Channel
HK-250GT

bmblb

thats neat. What wire do you use, gbisht? have you tried cutting a wing ?
"The Flight Of The Bumblebee"

gbisht

Hi,

I am using Guitar "E" string, 1st string of guitar.
I have tryed so many wires but they didnt work, and finally I bought it in 20Rs.

no I have not made wing because I dont have EPP foam, but yes wing is not a big deal, if you practice on Hot wire cutter
but 2side support is important for quality cut.

I am new in Plane Hobby, so can you tell me can we made plane with normal theracol sheet available at book store. ???
I have built micro plane but for middle size plane I am not sure.

http://www.rcindia.org/rc-people/hi-all-6659/msg77900/#msg77900
HSP 1/10 Nitro Tyrannosaurus Off-Road Truck
Thunder Tiger 1/10 SSK V2 Nitro Truck with Radio
HK-300 3 Channel 2.4ghz FHSS Ground Radio
Turnigy 9x 8-Channel
HK-250GT

bmblb

 yes you can.....its quite simple. just need some practice......and patience.

there are many ways of building and strengthening and over time you will develop your own. spend some time going over the scratchbuilts on this forum....as you get more comfortable with the material....you will do better and better....good luck :)
"The Flight Of The Bumblebee"