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Vendors Corner => Core House => Topic started by: phil c on December 14, 2010, 08:04:38 PM

Title: Foam Wing Cutting
Post by: phil c on December 14, 2010, 08:04:38 PM
The Core House can supply numerous foam wings for sport, stunt, combat, racing, and  yes,  RC.  We have been cutting wings with CNC accuracy for more than 35 years.  Sizes range from 5 in chord and 25 in span to 30 inch chord and 120 in span.  Using the TrueBeam(tm) construction we can cut wings that are similar in weight and strength to the best built-up wings with a fraction of the assembly time.

If you are willing to use a current stock wing(on the web site) costs are almost dirt cheap.  As little as $3.50 or so for a set of foam cores for a half A size stunter or combat plane.

Custom cutting is available to anyone.  The more work you do, and the less I have to do, the lower the cost.  Typical setup cost for a custom tapered wing runs $15 per template, working from parts or drawings.  Setup, drafting, layout, and CAD services are $30/hr.  If you can supply a compatible CAD file(DXF, DWG, CDR) it will be much less.  Contact me for details on setting up your drawing to get parts within .015in. on the first try.
Title: Re: Foam Wing Cutting
Post by: DON BERRY on March 06, 2011, 04:24:10 PM
What sizes do you have in straight chord wings, at least 24" long? ???
Title: Re: Foam Wing Cutting
Post by: phil c on March 28, 2011, 02:06:41 AM
Just saw this Don.

I could cut straight cord panels from about 5 in. to 16 in. in almost any thiickness you want.  Most of the airfoils are in the 15-18% range.  Scaling a particular airfoil for  chord and thickness is $15 for a one time setup fee.  Panels are usually 24 in(stock foam length)  30 in.(the max for the small cutter) and 60in for the big cutter.
Title: Re: Foam Wing Cutting
Post by: Rich Perry on April 22, 2016, 11:37:55 PM
  Phil,   On a custom, typical  combat wing.  480 sq. in.  for example, how much does adding spar slots to the core effect price?  Typical stuff.  1/8" x 3/8 root, vertical, tapering down to 1/8" x 1/8" at tip.    I have a local cutter, and the spar slots doubled the cost of the cores. 
Title: Re: Foam Wing Cutting
Post by: Tim Wescott on April 22, 2016, 11:59:56 PM
Look at Phil's web page -- he's got wings that size, complete with spar slots.  I'm building stunt trainers with them.
Title: Re: Foam Wing Cutting
Post by: phil c on April 23, 2016, 10:16:23 AM
  Phil,   On a custom, typical  combat wing.  480 sq. in.  for example, how much does adding spar slots to the core effect price?  Typical stuff.  1/8" x 3/8 root, vertical, tapering down to 1/8" x 1/8" at tip.    I have a local cutter, and the spar slots doubled the cost of the cores. 

The cores on the website are all current.  All  the cores that are all currently drawn include cutting the spar slots.  Most are stack cut, one above the other, in a 4in. thick block which limits the wing thickness to about 1.875in and a chord of 13in(to fit the box).  The other limit is cost.  4 sets of wings in a box
 is currently $40 except for some odd ones which include tips or require an odd layout to squeeze into the 4in

Give me a call  717-566-3810
Title: Re: Foam Wing Cutting
Post by: Rich Perry on April 24, 2016, 11:36:34 AM
Ok, thanks Phil.
Title: Re: Foam Wing Cutting
Post by: phil c on October 17, 2019, 07:18:15 PM
  Phil,   On a custom, typical  combat wing.  480 sq. in.  for example, how much does adding spar slots to the core effect price?  Typical stuff.  1/8" x 3/8 root, vertical, tapering down to 1/8" x 1/8" at tip.    I have a local cutter, and the spar slots doubled the cost of the cores. 

I don't remember if I contacted you Rich, but there is no extra charge for cutting spar slots, a leading edge slot or V for a wood leading edge, or even hollowing out the wing(there are limitations there and a wing thinner than 1.5in. totally loses any weight savings.)
Title: Re: Foam Wing Cutting
Post by: phil c on October 28, 2019, 11:59:13 AM
What sizes do you have in straight chord wings, at least 24" long? ???

The size is can be up to 32in. for straight wings.  Tapered wings can be up to 24-32in. depending on the taper ratio(tip/root).  Single panels can be up to to 2.75in. thick.  Two panels per block can be up to ~ 1.8in.  The chord can be up to 16in., depending on taper ratio.

I've got cores laid out from  112 sq.in. to 550 sq. in. symmetrical airfoils.

We're no longer cutting Giant cores such as a 94in. span RC Extra 300.
Title: Re: Foam Wing Cutting
Post by: phil c on November 22, 2020, 06:35:55 PM
  Phil,   On a custom, typical  combat wing.  480 sq. in.  for example, how much does adding spar slots to the core effect price?  Typical stuff.  1/8" x 3/8 root, vertical, tapering down to 1/8" x 1/8" at tip.    I have a local cutter, and the spar slots doubled the cost of the cores. 
  Phil,   On a custom, typical  combat wing.  480 sq. in.  for example, how much does adding spar slots to the core effect price?  Typical stuff.  1/8" x 3/8 root, vertical, tapering down to 1/8" x 1/8" at tip.    I have a local cutter, and the spar slots doubled the cost of the cores. 
As Tim W. points out, they all come with appropriate spar slots- 1/4 sq.for Half A or 1/4X1/8th.  1/8th x 3/8 for larger planes-balsa spars in smaller lighter planes, bass or spruce in bigger, heavier planes. 1/8 x 1/2 or even 1/4 x 1/2 for bigger stunters. If you want to go really big I've cut 1/2x1/2 spars for a 72inch Zlin R/C aerobat.