I didn't mean for this to sound like jumping on Bruce. I think Bruce likes to play with things like AROG that probably require a lot more fastidiousness (is that a word?) than the weight limit classes I fly.
----- Original Message -----
From: Bill Gowen
To: Indoor_Construction_at_yahoogroups.com
Sent: Sunday, April 12, 2009 12:37 AM
Subject: Re: [Indoor_Construction] Re: Adhesive formula (i know... been beaten to death)
Geez...
I go to the hardware store, buy a tube of Duco, build models, models fly, models stay together, models win contests occasionally. Why does this have to be so hard?
----- Original Message -----
From: Bruce McCrory
To: Indoor_Construction_at_yahoogroups.com
Sent: Saturday, April 11, 2009 10:16 PM
Subject: [Indoor_Construction] Re: Adhesive formula (i know... been beaten to death)
TCP is a standard plasticizer for Ambroid - 3 -4 drops per oz. I ordered a 12 pack (Ambroid) from Horizon and sold about half. My cost was $4.25 each. Unless you use it for outdoor, a couple 3.2 oz go forever. Sigment is supposed to be the same. Duco no longer acts the same.
Here's what I did first (after not finding any in stores):
1. The official homebrew is 1 ping-pong ball (were celluloid) per 1 oz of acetone. I tracked down the official approved world champs brand at 3-star (quality only) who say the formula (colloid) is same as 1952, eg. cellulose nitrate. These balls are about $5 - $6 each.
1.5 Cheap chinese balls are vinyl, stick if you like white dusty stuff at the joint, and have a 3x glue joint face to work with. Pretty bad.
2. Celluloid trinkets are all over the place, in people's collections of pre-1955 memorabilia.
3. Order Ambroid if you are a purist and bum some Peck Polymers TCP from another flyer.
Bruce
--- In Indoor_Construction_at_yahoogroups.com, "polymicroboy" <polymicroboy_at_...> wrote:
>
> But my interest is in an Ambroid/Duco formula that I used in the past that included TCP,DOP,TDP,LMNOP,AFL-CIO or something like that as placticizers that worked well enough for me.
>
> Archive searches haven't produced what I remember and hoping someone remembers something similar they might share the recipe.
>
> OR
>
> if you have something better...howaboutdat?
>
> Thanks
> KP
>
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Received on Sun Apr 12 2009 - 08:00:11 CEST