flyingwings WRA-SPEC WING User manual

Thank you for purchasing the WRA-SPEC WING
The SPEC wing is designed for the UK wing racing series.
The idea is to provide a homologated wing kit to allow you to participate in the
“spec series” wing racing league.
Its also an exciting & low cost wing to build and fly, whether for FPV or normal sport
flying.
Recommended Setup
2 x Micro size servos , 8-9g metal geared recommended
1 x Small receiver
1 x Lipo battery(s) 2200mah 3s (Grahene or high performance, not allowed)
1 x 2212-6 2200kv outrunner motor + APC 6x4 speed propeller
1 x 30amp speed controller
1 x connectors set
1 x Transmitter capable of elevon mixing or mixing module
1 x Lipo compatible charger
1 x 25mw FPV system
Power System: (inc with deal).
LETS GET BUILDING
WRA_ -SPEC RACE WING
Flyingwings recommends
that you get insured by the
BMFA.
www.bmfa.org
UHU POR
HOT GLUE GUN
CA GLUE
Ver 1.0

Top
Top
Bottom
Bottom
STEP
STEP
1
2
Glue the two wing halves, using uhu por
or hot glue
Turn the wing upside down and glue in the
carbon strip spars, Uhu Por is best for this

Bottom
Top
30mm
80mm
110mm
40mm
when cutting be aware of
the spars in the bottom of
the wing
Cut Battery bay
STEP
STEP
3
4
Glue on ply plates, as shown
Dimensions given are for
a typical 2200mah 3S
battery

Top
Top
100mm
100mm
75mm
75mm
90 degs
90 degs
Cut Servo & Receiver Slots
Cut Servo Slots
STEP
STEP
5
6
3mm
Cut channels for the wiring ate
approx 3mm deep, using a very
sharp knife

Top
100mm
75mm
90 degs
Cut FPV slots
It’s laminating time !
We leave this step up to you, and if you are not sure about laminating, check this video
out courtesy of Matt www.youtube.com/watch?v=U6hD7CeWEt4
My personal choice is to install as much equipment as possible like servos , RX, fpv ,
and all cables before laminating, so I don’t have to cut into the laminate after. This does
mean that whilst laminating, I have to make some cuts to allow the servos through. We
leave this up to you. We recommend 75mic laminate, around 2 metres is adequate.
Sand the front edge of each elevon as shown, as
a pair.
Then cover the elevon in tape.
MAKE A HANDED PAIR !!!!
STEP
STEP
7
8

Using 25mm strapping tape or cutting 50mm tape
down the centre, attach the elevons.
1. Run a strip down the back edge of one side of
the wing, half on half off, offer up the elevon at a
downward angle as show, attach it to the tape.
2. Angle the elevon up and apply the tape to the
bottom part of the hinge. Ensure free movement.
4-5mm
Motor mount assembly
STEP
STEP
9
10

STEP
STEP
11
12
Remove the laminate from
dotted area
Glue on motor mount and screw on
motor

160-165mm
Centre of gravity or
balance point
STEP 12
Cut out your camera hole, to suit your camera, use the template
provided if that helps.
When all parts are installed , insert the battery and check the centre of
gravity, add ballast if necessary to achieve this.
A rearward centre of gravity will result in bad flying performance.

Radio setup
Left stick should make the right elevon go down and the right
one to go up and vice versa
Back stick should make both elevon go up equally and vice
versa
View from rear of plane
Radio notes: Select “wing type” Delta or elevon on a computer radio, or use a v-tail mixer
unit.
trouble shooting
Everyone likes model aircraft to handle differently, but we list some
common problems
Q. The wing is very twitchy in roll (Aileron)
A. Reduce the travel limits down & add exponential
Q. The wing is rolling left at high speed
A. This is due to the torque reaction of the propeller, try adding a mix
between the throttle and aileron, so as the throttle increases the aileron
banks it right, just a small amount.
IMPORTANT
CENTRE OF GRAVITY
The centre of gravity is on 160-165mm back from the nose
tip of the wing
With all the parts assembled and the battery in, the wing
should balance at this point.
If the nose slightly tips forward that’s OK, If however the
wing tips back, place some lead into the nose, until balance
is achieved, failing to do this may render the aircraft
unflyable.
Recommended control throws measured at trailing edge of elevon.
Up/Down +/- 20mm, Left/Right +/- 20mm, measure from the point shown by
the arrow >>
Important : When setting control throws, note that all 4 settings
(up,down,left,right) are the same whatever value. Ie all 75% or all 65%
We also suggest if available, to use Exponential on the elevons (Aileron &
Elevator) at 40%