New Products Flash Sale
Thread Tools
Old Jul 24, 2007, 11:13 PM
Scarey is offline
Find More Posts by Scarey
Registered EDF abuser
Scarey's Avatar
Joined Jan 2006
1,071 Posts
Why aren`t most foam planes made with EPP or equivalent.

Most of the foam planes are made with EPS or "beer cooler foam" EPP or equivalent like foam is so much more sturdy an reistant to dings and crashes.
Multiplex and Walkera use it. I dont have to glass it unlike EPS.
Scarey is offline Find More Posts by Scarey
Reply With Quote
Sign up now
to remove ads between posts
Old Jul 24, 2007, 11:20 PM
rdeis is offline
Find More Posts by rdeis
AMA 353531
rdeis's Avatar
United States, CO, Colorado Springs
Joined Aug 2003
6,701 Posts
It's heavy and flexible.

Flying works better when the material is light and rigid.

There are manufacturing and cost issues, too, but forme the weight and rigidity are most important. I can glass it and end up stronger, stiffer, and still lighter and cheaper than EPP.
rdeis is offline Find More Posts by rdeis
Reply With Quote
Old Aug 31, 2015, 10:02 AM
Lee is offline
Find More Posts by Lee
Lee's Avatar
USA, UT, Orem
Joined Jul 2004
10,066 Posts
The biggest reason we don't see more EPP planes is that EPP doesn't work well in an injection molds for big production runs. It tends to get a heavy skin in the mold and stick to the mold.

Most of the EPP planes are wire cut one at a time making EPP an expensive material to work with. EPP is more flexible for its weight so it requires spars and structure reinforcing.

The advantages of EPP are significant. Try this with an EPO or EPS plane.

RC Plane Crashes into Brick Wall in Slow Motion. (7 min 31 sec)
Lee is offline Find More Posts by Lee
Reply With Quote

Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Discussion Why aren't you building with EPP? sloper steve Foamies (Scratchbuilt) 1513 Oct 12, 2014 07:34 AM
Discussion Why Aren't You Building With Free Box Packing Foam? scratchandbash Foamies (Scratchbuilt) 21 Dec 30, 2006 01:05 AM
Rant Blade Balancing problems or why aren't they closer to the same weight? Roll Mini Helis 3 Jul 16, 2006 12:31 PM
Discussion Why aren't more outrunners made this way? rmteo Power Systems 42 May 23, 2006 04:00 PM
Alert Hey, why aren't there any molded-plane style EPP planes yet?! e-sailpilot86 Slope 29 Oct 12, 2002 01:18 AM