[NSRCA-discussion] Foam Wing Cutting

[Ron Van Putte]

40 years ago, I made one, using a 24 volt secondary transformer and a  
50 ohm wirewound variable resistor.  I mounted both in a metal  
project box, with rubber grommets in the entry/exit holes.  I haven't  
seen the need to upgrade to more modern items.  Works great.

Ron Van Putte

On Dec 26, 2007, at 10:17 AM, Ed Alt wrote:

> I just dug out my set up.  I used a Stancor P-8554 transformer.   
> The secondary winding is rated at 30 VCT  1.7A.  You could use  
> something close to that, around 24 to 36V  would probably work, it  
> will just mean that the dimmer switch position will be different  
> depending on the characteristics of the transformer.  You might  
> want something around 2.5A  rating, just for extra margin to keep  
> it loafing along instead of straining it.
>
>
> Ed
>
>
> -----Original Message-----
> From: nsrca-discussion-bounces at lists.nsrca.org [mailto:nsrca- 
> discussion-bounces at lists.nsrca.org] On Behalf Of Ed Alt
> Sent: Wednesday, December 26, 2007 11:10 AM
> To: 'NSRCA Mailing List'
> Subject: Re: [NSRCA-discussion] Foam Wing Cutting
>
>
> You can use a light dimmer switch in series with a step down  
> transformer.  Connect the cutter wire to the secondary and you have  
> a variable temp cutter that doesn’t have a shock hazard, assuming  
> you properly insulate all the wiring from the AC cord, dimmer and  
> transformer primary.
>
>
> Ed
>
>
> -----Original Message-----
> From: nsrca-discussion-bounces at lists.nsrca.org [mailto:nsrca- 
> discussion-bounces at lists.nsrca.org] On Behalf Of Earl Haury
> Sent: Wednesday, December 26, 2007 10:44 AM
> To: NSRCA Mailing List
> Subject: Re: [NSRCA-discussion] Foam Wing Cutting
>
>
> I built one of these for my son several years ago (wish I'd built  
> 2) and it's gotten a lot of use with no problems at all. The only  
> issue now is that Radio Shack may no longer carry the parts -  
> places like Mauser Electronic will have them though.
>
>
> Earl
>
> ----- Original Message -----
>
> From: jimmy graver
>
> To: nsrca-discussion at lists.nsrca.org
>
> Sent: Wednesday, December 26, 2007 9:34 AM
>
> Subject: [NSRCA-discussion] Foam Wing Cutting
>
>
> I was wondering if I could get a little input. On the NSRCA web  
> site there is a foam wing cutter controller and I was thinking of
>
> building it to try my hand at cutting my own wings. I never did  
> this yet, always built balsa frame up. It will open up quite a few new
>
> designs for me. I was thinking of building a Boxer but I have to be  
> able to cut foam. So any help would be appreciated. Did any
>
> of the people on the list build and use one? If so how did it work?  
> Any other controllers better? You can either put your reply
>
> on the list if you think there is an interest or send me a private  
> email. Thanks for you help Jimmy.
>
> email: planedoc at ptd.net
>
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