Pegasus Models PHASAR User manual

Pegasus Models Phasar
By Algy Yates 1
Pegasus Models – PHASAR
The Phasar is not intended to be a 1st model to fly or build. This is your opportunity to build a
very individual model. I can quite honestly say that you will not see another exactly the same
as yours. You will have the pleasure of constructing your own airframe, with the opportunity
to incorporating your own ideas / modifications and, best of all, colour scheme.
Disclaimer
I take no responsibility for the airworthiness or safety of your model.
Note also that radio controlled aircraft are not toys and should be treated with respect, only
being operated by competent pilots or under the supervision of a competent pilot.
This write up is to show you the sequence I used during my build and modifications I carried
out to allow the use of a CRRC Pro GF26i V2 petrol engine. That said they might be of help,
by acting as a guide to anyone building this aircraft. The main areas I have changed are the
nose, with the engine inverted and larger, and secondly the incorporation of a swept carbon
undercarriage.

Pegasus Models Phasar
By Algy Yates 2
About the kit.
The kit consists of veneered foam components, CNC milled sheet Ply and Balsa strip,
Vacuum Formed parts and there is a basic hardware pack.
What you will need to get.
Glues: PVA, 5min Epoxy, 1Hr Epoxy, Cyno, Cyno Kicker and Laminating Epoxy.
Extra Hardware needed: 3 ¼” spinner, 3” wheels, collets, petrol bung, control rods, covering
& fuel proofer.
Radio Gear: 5 x high torque servos (preferably Digital) for the control surfaces, 1 x standard
servo for the throttle, high capacity receiver battery, ignition battery (petrol engine aircraft
only) and a electronic cut-off switch for the ignition (petrol engine aircraft only).
Additional Tools: Other than the normal modelling tools, incidence meter (recommended) and
basic jig (ply board as seen in accompanying photographs is recommended).
Getting started.
You will note that in each section that I have included: a picture, recommended an adhesive
and listed the new wooden parts needed.
1) Join the front and rear sheet
section of the fuselage sides. Do
this by taping the outside of the
joint making sure the top line is
true. Then flex back the joint,
apply the glue, lay the assembly
flat on your board and weigh it
down.
Balsa Parts 1 & 2
Lite Ply Parts Nil
Beach Ply Parts Nil
Other Components Nil
Recommended Glue PVA

Pegasus Models Phasar
By Algy Yates 3
2) Use Part #7 to mark both
inside faces of the fuselage
sides, to show “Wing Key” slots
and servo cable access hole.
Make sure you make a Port &
Starboard (STBD).
Balsa Parts Nil
Lite Ply Parts Nil
Beach Ply Parts Nil
Other Components Nil
Recommended Glue Nil
3) Mark the inside faces using
the ½ scale plan for the
dimensions. Noting which side
the strip is glued.
Allow 2 ¼” for Part #5.
Trim Part #4 to fit between the
“Wing Keys”.
Balsa Parts 5
Lite Ply Parts Nil
Beach Ply Parts Nil
Other Components Nil
Recommended Glue Nil
4) Build up the frames using ¼”
x ¼” (Part #3), strip (Part #6)
and Sheet Parts #4 & 5.
Pin or weigh down on a flat
board and leave to dry.
Balsa Parts 3,4,5&6
Lite Ply Parts Nil
Beach Ply Parts Nil
Other Components Nil
Recommended Glue PVA

Pegasus Models Phasar
By Algy Yates 4
5) Glue on doublers (Part #7),
you may need to sand the
framework flat first. Ensure the
doubler is inline with the top
and front of the outer balsa skin.
Weigh down until fully dry.
Then cut out the Wing Key slots
in the outer skin.
Balsa Parts Nil
Lite Ply Parts 7
Beach Ply Parts Nil
Other Components Nil
Recommended Glue PVA
6) Once you are sure the
assembly is thoroughly dry align
the top and front edges and
clamp the sides together. Now
sand the bottom edge to make
both sides match closely.
When your happy, de-clamp and
cut out the servo lead cutouts.
Balsa Parts Nil
Late Ply Parts Nil
Beach Ply Parts Nil
Other Components Nil
Recommended Glue Nil
Sorry No Picture
7) Mark up the frames (Parts # 8
& 11) to ensure the top spacers
(Part #10 & 12) are aligned with
the top & bottom of the tongues
on the frames. Ensure a close fit
to the “Wing Keys”.
When your happy glue the
spacers into position. Note they
are glued edge one.
Balsa Parts Nil
Lite Ply Parts Nil
Beach Ply Parts 8,10,11 &12
Other Components Nil
Recommended Glue 5 Min Epoxy

Pegasus Models Phasar
By Algy Yates 5
8) Put a layer of tape over the
top “Wing Key” to protect it
while you sand the spacers flush
with the “Keys”.
Now glue on the remaining parts
(#9 & 10), be very sparing with
the glue, you can add fillets later,
but it is very hard to remove glue
from inside the “Key Ways”.
Balsa Parts Nil
Lite Ply Parts Nil
Beach Ply Parts 9 & 10
Other Components Nil
Recommended Glue PVA
9) Mark the centre line of the
“Wing Keys” on to the “Wing
Boxes” and a mark 15mm in
from the ends of the tongues.
Mark the centre of the captive nut
packers (#15). Glue them in place
so that the outer edges are lined
up with the 15mm mark and they
a centred on the key centre line.
Balsa Parts Nil
Lite Ply Parts 15
Beach Ply Parts Nil
Other Components Nil
Recommend Glue PVA
10) Drill the “Wing Boxes” with
the “Wing Keys” in place, using
a 6mm drill bit and drill
perpendicularly right through.
Now remove the “Keys” and drill
the packers and that side of the
box only, to 8.5mm.
Insert the “Keys” before
hammering in the captive nuts.
Note: The Port keys are ahead of
the STBD ones.
Balsa Parts Nil
Lite Ply Parts Nil
Beach Ply Parts Nil
Other Components Nuts
Recommended Glue PVA

Pegasus Models Phasar
By Algy Yates 6
11) Mark the C/L and thrust line
(60mm up from the base) onto
the “Engine Bulkhead” (#16).
Now you can mark the positions
of your engine mount fixing
screws. Drill the holes and fit the
captive nuts. Much easier to do
now!
Note: You can see how close the
CRRC26 mountings are to the
edge.
Balsa Parts Nil
Lite Ply Parts Nil
Beach Ply Parts 16
Other Components Nuts
Recommended Glue Nil
12) Make sure you have all the
Wing Boxes the right way up and
the right way round, before
gluing them and the Bulkhead
into position. Ensure that
everything is square as there isn’t
any side thrust on this aircraft.
Balsa Parts Nil
Lite Ply Parts Nil
Beach Ply Parts Nil
Other Components Nil
Recommended Glue 1Hr Epoxy
13) Cut the triangular balsa
Bulkhead reinforcing strips
(#17), relieving them around the
captive nuts and ensuring a
close fit. Take care not to get
glue inside the captive nuts; a
trick here is to put a small piece
of tape over the back of the nuts.
Balsa Parts 17
Lite Ply Parts Nil
Beach Ply Parts Nil
Other Components Nil
Recommended Glue 5 Min
Epoxy

Pegasus Models Phasar
By Algy Yates 7
Wing & Tail Construction
14) Place the Wing Key into the
Wing Boxes (ensure the Port ones
are ahead of the STBD ones and
that they are all the right way up)
and fit the bolts.
Use the Lite Ply Root Ribs (#69)
and mark the position that the foam
core should come to.
Balsa Parts Nil
Lite Ply Parts 69
Beach Ply Parts 13 & 14
Other Components Nil
Recommended Glue Nil
15) Ensure the Wing Keys fit
correctly into the wing panels, trim
core as required.
Put tape over the top of the key slots
and bolt the Keys together.
Now apply epoxy to the slots and the
Keys. Slide the Keys into the wing
panels and weigh both wings down
(top surface down) on a flat bench
and check the lines on the Keys are
aligned with the foam cores.
Balsa Parts Nil
Lite Ply Parts Nil
Beach Ply Parts Nil
Other Components Nil
Recommended Glue 1Hr Epoxy
16) Once the Keys are fully cured,
unbolt the assemblies.
Glue in place the Leading (#65)
and Trailing Edges (#64) and allow
to dry before sanding roughly to
shape.
Balsa Parts 64 & 65
Lite Ply Parts Nil
Beach Ply Parts Nil
Other Components Nil
Recommended Glue PVA

Pegasus Models Phasar
By Algy Yates 8
17) Fit the inner Trailing Edge
Core (#63), ensuring its aligned
with the wing root and the top
surface.
This will make fairing any
differences easier.
Balsa Parts Nil
Lite Ply Parts Nil
Beach Ply Parts Nil
Other Components 63
Recommended Glue PVA
18) Cut a section of trailing
edge strip (#67).
Fit the Balsa trailing edge strip
to the inner Trailing Edge Core.
Balsa Parts 67
Lite Ply Parts Nil
Beach Ply Parts Nil
Other Components Nil
Recommended Glue PVA
19) While the root end is drying
fit the tip blocks (#68) and cut
off (& retain) the small piece for
the aileron.
Balsa Parts 68
Lite Ply Parts Nil
Beach Ply Parts Nil
Other Components Nil
Recommended Glue PVA

Pegasus Models Phasar
By Algy Yates 9
20) Let the wing components
dry thoroughly.
Move to the ailerons and fit the
trailing edge balsa strip (#67).
This needs to dry fully before
fitting the aileron leading edge
or you could end up with a
warped aileron (not good).
Balsa Parts 67
Lite Ply Parts Nil
Beach Ply Parts Nil
Other Components Nil
Recommended Glue PVA
21) Put some packing tape on the side of
the fuselage and cut out holes for the Wing
Key. Cut the Root Ribs (#69) to remove
the sections for the Wing Keys.
Only work on one wing at a time. Mix up
some Laminating Epoxy with some Micro
Balloon and apply to the wing root and
roughly fit the Root Rib then fit the key
into the fuselage and fit a bolt into each
key.
Make sure all look well and close fitting
before leave it to dry, and then repeat for
the other side.
Balsa Parts Nil
Lite Ply Parts 69
Beach Ply Parts Nil
Other Components Nil
Recommended Glue Laminating Resin
22) Glue a piece of scrap 1/8”
Balsa to the exposed foam at the
end of the inner trailing edge
section.
Balsa Parts Scrap
Lite Ply Parts Nil
Beach Ply Parts Nil
Other Components Nil
Recommended Glue PVA

Pegasus Models Phasar
By Algy Yates 10
23) Mark and cut out the lower
surface of the wing to accept the
servo boxes.
Try to make the surfaces as
smooth as possible.
Balsa Parts Nil
Lite Ply Parts Nil
Beach Ply Parts Nil
Other Components Nil
Recommended Glue Nil
24) Build up the servo boxes
from the Balsa (Parts #70, 71 &
72) using cyno or PVA. When
dry you should cut a hole for the
servo cables and check your
chosen servo fits.
Once happy glue into place with
boxes in place with PVA.
Balsa Parts 70,71&72
Lite Ply Parts Nil
Beach Ply Parts Nil
Other Components Nil
Recommended Glue PVA
25) Sand the wing to shape and
fill using light weight filler.
Take your time when sanding
the Wing Keys to ensure that
you do not sand the veneer
away, a tip here is to apply
masking tape each side of the
Keys to protect the veneer.
Then apply the glass bandage
using laminating resin.
Balsa Parts Nil
Lite Ply Parts Nil
Beach Ply Parts Nil
Other Components 74
Recommended Glue Resin