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NEFPV Spec RaceWing

The NEFPV SpecWing is made from 1/4" foam board covered with contact paper.  Very fun to fly, whether tooling around or racing.  Lots of speed and tracks well.  Wingspan is 35 inches.

See below for the launcher, parts list and videos.
See here for a gallery of pics.
See here for a forum thread on the wing.
See here for a PDF of the design.
See here for a pic of the NEFPV Racing Spec Wing logo.

There are several YouTube videos that go over how to do the build -- the one I followed was:  2013 CNC-HP-WING The 10 Minute Build Video.  At 9:24 in the video is contact information for ordering a kit containing pre-cut foam, motor mount, and some hardware.

For my build I used white wood glue on the inside spars (so I wouldn't have to worry about it firming up too fast) and let it dry overnight.  I used Foam-Tac for gluing the foam pieces together, and epoxy for the motor mount and control horns.

Weight (without battery) is 482g.  The CG-balance point is 8.5" back from the nose.

I put all my electronics inside, held in place with velcro; no bays except the opening for the battery.  One trick I do with the velcro is to slide things in with a ruler or piece of paper underneath, and then remove the ruler/paper to let the velcro attach.  In addition to getting the CG right, you also want to get the "lateral" balance even (so one side is not heavier than the other).  One good bit of quick-and-easy reinforcement is to put a layer of packing tape on each leading edge of the wing.

I think this is the foam board that comes in the kits:

R5 Faced Polystyrene Foam Board Insulation (Common: 0.25-in x 4-ft x 50-ft; Actual: 0.25-in x 4-ft x 50-ft)
  Item #: 127129 | Model #: 669153

Owens Corning FOAMULAR 1/4 in. x 4 ft. x 50 ft. R-1 Fanfold Insulation Sheathing $47.00/pallet
  Model# 10UM SKU# 409692


I created a launcher made from $1 yardsticks (qty 10), #6-32 3/4" bolts and nuts, small wood screws, and some packing tape.  The "rails" are about 12 inches apart.  If they are wider, the wing has a tendency to "fall through" the rails.  I taped a couple of guides (made from strips of EPP foam) to the bottom of the wing to keep it centered (pic).  The prop torque makes it lean to the left on takeoff, so I twist the rig a little to make the right-side rail a bit lower.  Putting a weight on the front "leg" of the launcher prevents it from toppling over.

See here for a gallery of lancher pics.
See below for a video of the launcher.

Parts List:

Con-Tact Brand Creative Covering Self-Adhesive Shelf Liner, White, 18"x 9'
  (Could also use clear or other colors/designs)

Corona 929MG Metal Gear Servo 2.2kg/ 12.5g/ 0.10sec CS929MG

D2826-6 2200kv Outrunner Motor D2826-62200

HobbyKing 40A ESC 4A UBEC 9261000003

Turnigy 2200mAh 3S 30C Lipo Pack T2200.3S.30

APC 6x4 Thin Electric Propeller LP06040E
  (The HobbyKing 6x4 props work but their adapter rings fit poorly)

Aluminum Propeller Adapter (Collet Type) 3.17mm 017000383-0
3.17mm PROP ADAPTOR ,3.17mm input to 5mm prop shaft
  (The D2826 motor comes with a collet adapter; these are for spares)

Blenderm / Dubro Electric Flyer Hinge Tape #916
  (Hobby shops usually have this in stock)

Video system:

RunCam 600TVL Plastic Housing FPV Camera US-PZ0420H-L36

Boscam FT951 5.8G 22CH 25mW Super Tiny Wireless Video Transmitter

Sander Style LC Filter

Alternate video system (what I used):

Plastic Case Sony Super HAD CCD 600TVL Super Mini FPV Camera 2.1mm Lens HS1178

8CH 1.2G/1.3G AV 100mW Wireless Transmitter TX WS1150

Homemade IBCrazy-style Inverted Vee Antenna

DIY Video Power Filter Circuit

Low Pass Filter LPF1400
  (Reduces interference with 2.4GHz control)

FPV Fiberglass Pan-Tilt Camera Mount Q004


2013 CNC-HP-WING The 10 Minute Build Video

NEFPV SpecWing FPVDL Holden 2015-06-05

NEFPV SpecWing Improved Launching Rig 2015-07-25

Click here to contact me

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ET Heli