Murry Rozansky

There are all kinds of foam. Styrofoam which is a Dow  trade mark (blue foam color is a tm too) is widely used generically. The florists foams are lower density and strength. The pour foams I have heard of are poly urethane based and in 2# density shape easily but are not dependable for core, too brittle and when hot wired produce poison gas. Pour foams can vary greatly within a pour.  Billet foam with the same chemicals and higher density can work well. It takes R&D and testing to prove. Following plans should be safe, given decent workmanship. Changes become much more experimental.
From: jay@... [Q-LIST]
Sent: Friday, February 10, 2017 11:11 AM
To: Q-LIST@...
Subject: Re: [Q-LIST] Re: FOAM

Aircraft Spuce still provides this foam. More expensive probably, but it is assured of being the right stuff.


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