[NSRCA-discussion] Castings; was El Nino canopy

[Rcmaster199 at aol.com]

Check in the K Factor archives. The technique was described there a  few 
years ago. Obtaining the correct raw material is keyto success.
 
Canopies are the simplest castings that can be made from original plastic  
parts. For those that are so inclined, it is the easiest to master and a good  
stepping stone to more complex casting of composite parts.
 
Matt K
 
In a message dated 12/19/2005 11:06:11 PM Eastern Standard Time,  
perkinsrx at centurytel.net writes:

I've  seen the canopy used as the mold for PVA & wax, with excellent results. 
 Paint on top of the pva/wax and then lay up directly onto the paint/wax/pva. 
 The paint will incorporate into the glass for a shine that's beautiful. And  
amazingly enough for about 1/2-2/3 the weight of the  original.
I  did this once BUT rushed to pop it out and didn't let it cure - got  
pinholes.
I  saw Larry Mercer do several that were perfect.
Of  Course you DO have to get to the underside of the canopy to do this   :-))
Eddie

-----Original Message-----
From:  nsrca-discussion-bounces at lists.nsrca.org  [mailto:nsrca-discussion-bo
unces at lists.nsrca.org]On Behalf Of Scott  Anderson
Sent: Monday, December 19, 2005 9:17 PM
To:  NSRCA Mailing List
Subject: Re: [NSRCA-discussion] El Nino  canopy


PVA and wax the original then use  tooling resin for making the mold or a 
good epoxy and fiberglass to make the  mold then use PVA and wax on the mold and 
lay-up the new canopy  inside..
 

Scott Anderson
Performance  Model Aviation


----- Original Message ----- 
From:  _Mark Hunt_ (mailto:flyintexan at houston.rr.com)  
To: _NSRCA Mailing List_ (mailto:nsrca-discussion at lists.nsrca.org)   
Sent: Monday, December 19, 2005 9:39  PM
Subject: Re: [NSRCA-discussion] El  Nino canopy


I have seen mild success by using the  original canopy as a sort of 
mold....wax the inside surface then glass  it....hopefully it can then be popped 
out......will certainly have a few  pinholes....  I saw this actually work quite 
well to replicate  canopies for a widebody 60.....the glass ones were light  too.





 
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