Wallaby Mk2
49.5in Span Electric Sports Model 4/500w Motors & 4-6 Channel RC Equipment.
Designed by: Stan Yeo
Produced by: Phoenix Model Products
Introduction
The Wallaby Mk2 is a 4/5 channel electric power
sports aerobatic model of simple design that has a
spritely performance and is a bundle of fun to fly.
With a typical 4/500w 3536 size motor the Wallaby
is a delight to fly and has for us brought back happy
memories of the original 1981 design powered by a
Fuji 25 IC motor. The optional flaps are an added
bonus for those who like to play with different
control setups! The Wallaby Mk2 is a very capable
model and can perform all aerobatic manoeuvres
expected is this type of model.
The all wood easy build construction follows the
now well proven path of other models in our range.
Radio Equipment Required
The recommended radio equipment required for
the Wallaby Mk2 is two metal geared micro servos
i.e. Hitec HS82MG or the Ripmax New Power
XL16HM or XL17HMB for the Ailerons/Flaps plus
two standard size servos for the Rudder & Elevator
with a 4/6 channel receiver. For Flapperon
operation a 6ch transmitter and 6ch receiver is
required.
Electrical Power Train
The Wallaby requires a 3536 Brushless Motor
rated at 400-500w and 1000 – 1300 Kv. A 50/60A
Speed Controller (ESC) and a 2200 3S LiPo. The
prototype used a 3536/06 1270Kv motor with a 60A
ESC. 9x6in APCE propeller and a 2200mAhr 3S
30C LiPo. With this set-up the Wallaby is more than
adequately powered with typically flight duration of
10 minutes. If you use a different specification
motor or a 4S battery then a different size propeller
should be used. If you are unfamiliar with model
electrics then please read the articles on our
website
.
Tools / Materials Required
The tools required to build the Wallaby Mk2 are a
modelling knife with spare blades, a 2ft /1 Metre
Straight Edge, a miniature David Plane,180 grade
Wet & Dry sanding block and soldering iron. The
glues used to build the model are white PVA wood
glue, thin Superglue (please observe safety
precautions) and a very small quantity of two part
epoxy. We recommend using a polyester heat
shrink film for covering such as Oracover/Profilm or
the thinner more economic version Easycoat.
Please Note: PVA is the recommended glue for
nearly ALL wood joints, particularly when building
the wing. Also for maximum glue joint strength we
recommend lightly sanding laser cut edges before
gluing.
Building the Fuselage
1. Lightly sand the ply fuselage doublers with 180
grade wet and dry to remove the 'release'
agent. Remove dust with a small brush or
vacuum cleaner.
2. Using
a
spirit
based contact adhesive such as
Uhu or EvoStik glue the ply nose doublers in
position ensuring there is a left and right side.
Motor side thrust and down thrust is built in
consequently the right side is shorter than the
left!!!
3. Mark out the position of formers F2 & F3 on the
inside of the fuselage sides ensuring there is a
left and right side.
4. Cut slot for Rudder and Elevator cable exits as
indicated on plan (Both underneath Tailplane).
5. Glue strip longeron super structure including
triangular support strips in the nose, Wingseat
and ply wing dowel washers to fuselage sides.
6. Lightly sand edges of fuselage side to prepare
gluing surface to receive top and bottom sheet.
7. Join fuselage sides together over the plan
ensuring that both are straight and square.
8. Before removing fuselage from plan fit spruce
trailing edge back-stop, top 4.5mm sheet at
front and rear of hatch and rear top sheeting.
9. Fit Rudder and Elevator control rods. Control
rods exit fuselage on opposite sides. Anchor to
fuselage sides every 100-120mm using scrap
balsa. Superglue in place. Before fixing control
cables check control cables are not binding
and move freely. Tie and glue control rods
together where they cross.
10. Dry fit Undercarriage to ply plate and drill
1.5mm pilot holes for saddle clamp screws.
11. Fit Fuselage bottom front and back including
ply undercarriage plate using PVA glue.
12. Construct Hatch and fit as per diagram.
13. Lightly mark
out centreline
on tailplane
ensuring it is
square to the
hinge line.
14. Glue
Summary of Contents for Wallaby Mk2
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