[NSRCA-discussion] Foam Wing Cutting

[Tony]

Bob Noll had a version published in the K-FACTOR several years ago.. 

 

Tony Stillman, President

Radio South, Inc.

139 Altama Connector, Box 322

Brunswick, GA  31525

1-800-962-7802

tony at radiosouthrc.com

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From: nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Ron Van Putte
Sent: Wednesday, December 26, 2007 12:05 PM
To: NSRCA Mailing List
Subject: Re: [NSRCA-discussion] Foam Wing Cutting

 

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 <mailto:planedoc at ptd.net>  

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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