HobbyKing.com New Products Flash Sale
Reply
Thread Tools
Old Sep 17, 2014, 09:20 PM
Registered User
United States, NC, Holly Springs
Joined May 2013
151 Posts
Discussion
first attempts at making my own wing cores

Not to terrible. But a little more practice and I should have it down

What to you guys use to stregthen your foam.
Testing with epo. But will most likely be using dow blu board.
Atrocityx is offline Find More Posts by Atrocityx
Reply With Quote
Sign up now
to remove ads between posts
Old Sep 18, 2014, 12:14 AM
Fremont, CA
United States, CA, Fremont
Joined Jan 2009
1,667 Posts
I have used newspaper and white glue. Works well but a bit hard to handle (the paper becomes very weak when wet).
But I'm going to try this guy's method next... He uses masking paper from Home Depot.
Tutorial 3: paper coating foam wings (9 min 31 sec)
djacob7 is offline Find More Posts by djacob7
Reply With Quote
Old Sep 18, 2014, 08:26 AM
Canadian Bacon
flypaper 2's Avatar
Kingston, Canada
Joined Jun 2004
12,911 Posts
The waves on the outer end of the panel is usually caused by roughness causing the wire to catch for a second. Try smoothing it a bit more to help. I use # 600 wet/dry paper. Hope this helps.

Gord.
flypaper 2 is offline Find More Posts by flypaper 2
Reply With Quote
Old Sep 18, 2014, 10:41 AM
serial scratchbuilder
Granted's Avatar
Canada, BC, Mission
Joined Sep 2012
1,340 Posts
Quote:
Originally Posted by flypaper 2 View Post
The waves on the outer end of the panel is usually caused by roughness causing the wire to catch for a second. Try smoothing it a bit more to help. I use # 600 wet/dry paper. Hope this helps.

Gord.
Roughness of the template, he means.
Granted is online now Find More Posts by Granted
Reply With Quote
Old Sep 18, 2014, 11:08 AM
Registered User
United States, NC, Holly Springs
Joined May 2013
151 Posts
Yeah I heard a ping in some parts.will take a fine file to my templates when I get home.
they are I cut them out on my companys cnc machine to avoid burs.guess its time to replace the bit.

As always thanks for the advice keep it coming.
atro
Atrocityx is offline Find More Posts by Atrocityx
Reply With Quote
Old Sep 18, 2014, 02:35 PM
Canadian Bacon
flypaper 2's Avatar
Kingston, Canada
Joined Jun 2004
12,911 Posts
Yeah, my fault for not giving a better explanation. You'll have to excuse an old phart that's been cutting cores since the 60s.

Gord.
flypaper 2 is offline Find More Posts by flypaper 2
Reply With Quote
Old Sep 18, 2014, 07:55 PM
Registered User
The high desert of Southern California
Joined Jul 2002
1,211 Posts
I have never had real smooth core using wood template. The grain and fibers keep the template from being as smooth as glass. But you can use foil tape over the wood and they are so much smoother and last a lot longer. I pick it up from a local stained glass store.

http://www.amazon.com/inch-yds-Coppe...pper+foil+tape

Best template material I have used is old circuit board. A lot harder to work with, but you can sand and polish the edges so the wire slide very smoothly.


Buzz.
blvdbuzzard is offline Find More Posts by blvdbuzzard
Reply With Quote
Old Sep 18, 2014, 09:22 PM
Canadian Bacon
flypaper 2's Avatar
Kingston, Canada
Joined Jun 2004
12,911 Posts
I use Formica countertop material. Very hard but easy to work with. Heat resistant so it can handle the heat of the hot wire. The edge will take a very fine finish. If you want to try it, you can probably get scraps at a lumber yard where it's cut to fit.

Gord.
flypaper 2 is offline Find More Posts by flypaper 2
Reply With Quote
Old Sep 18, 2014, 11:28 PM
serial scratchbuilder
Granted's Avatar
Canada, BC, Mission
Joined Sep 2012
1,340 Posts
Wood templates work fine if you affix a piece of solid wire along the profile, give the hotwire something smooth to run on.
Granted is online now Find More Posts by Granted
Reply With Quote
Old Sep 19, 2014, 07:04 AM
Registered User
illinois
Joined Jun 2001
597 Posts
I have used wood and even heavy artboard for templates in the past with good results.
Use thin CA to harden the edges. Lightly soak with CA sand smooth with 400 to 600 wet/dry and repeat until smooth. Good heat control will help avoid softening the CA.
wim5150 is offline Find More Posts by wim5150
Reply With Quote
Old Sep 19, 2014, 08:43 AM
Registered User
United States, NC, Holly Springs
Joined May 2013
151 Posts
I used aluminum composite paneling 1shwet of 22gauge aluminum 3mm of fire rated core and another sheet of aluminum.

Another question when I made my templates I had the elevons in mind but now I am thinking that it was a bad idea. Im building a delta and where I trimmed the excess material out it looks to thick. Any suggestions
Atrocityx is offline Find More Posts by Atrocityx
Reply With Quote
Old Sep 20, 2014, 07:12 PM
Registered User
United States, NC, Holly Springs
Joined May 2013
151 Posts
Not as smooth as I would have liked so pulled it off and sanded what I could smooth and started over looks better than it did
Atrocityx is offline Find More Posts by Atrocityx
Reply With Quote
Old Sep 21, 2014, 08:46 AM
An itch?. Scratch build.
eflightray's Avatar
South Wales U.K.
Joined Mar 2003
13,406 Posts
As well as wing cores it's worth cutting yourself some thin sheet, always comes in useful for fuselage sides, even the tail feathers.

Just space the cutting wire off the table at the thickness of sheet you want. Also good practice for determining cutting speeds and wire temperature without wasting wing cores, just use up the off-cuts.
eflightray is offline Find More Posts by eflightray
Reply With Quote
Old Sep 22, 2014, 10:49 AM
Registered User
United States, NC, Holly Springs
Joined May 2013
151 Posts
The cores came out very well its the covering that came out terribly wrinkled
Atrocityx is offline Find More Posts by Atrocityx
Reply With Quote
Old Sep 22, 2014, 05:06 PM
Registered User
aymodeler's Avatar
United States, CT, Hartland
Joined Jul 2011
162 Posts
This is something I have been wanting to try myself. Can you describe what you used for your hot wire setup (power supply, controls, wire, etc.).

Al
aymodeler is offline Find More Posts by aymodeler
Reply With Quote
Reply


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Discussion my first attempt at wing ribs with cut outs SiGone The Builders Workshop 28 Oct 06, 2014 10:01 PM
Discussion First attempt at putting in my own rx Atcgolfer Electric Plane Talk 3 Mar 26, 2014 01:12 PM
Discussion Attempt at making my own graphics/ stickers tele1974 Electric Plane Talk 14 Jan 11, 2010 08:51 PM
My first attempt at my own plane JPA2002 Foamies (Kits) 14 Mar 07, 2004 08:33 PM