JSM XCalibur+ User manual

Instruction
Manual
Specification:
Wingspan: 2338mm (92”)
Length: 2412mm (95”)
Weight: 13.25Kg (Approx.)
Radio: 8 Channel (Minimum Required)
Turbine: 80-160N (8-16Kg) (Recommended)

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Congratulations on your purchase of the Xcalibur+ Jet. This high performance model is ideal for use
as a first jet or as a sports jet model.
Before you build the model, please read the instructions the whole way through to understand the
construction sequence.
Warning: The Xcalibur+ has been designed to enable turbines of 80 to 160 Newtons thrust to
be installed, however it is VERY important to note that if turbines of over 120 Newtons thrust are
fitted, full power should not be used for any extended diving manoeuvres, as this will lead to speed
in excess of the design specifications. The use of full power in level flight or climbing manoeuvres
is completely acceptable. As the Xcalibur+ is a light and low drag airframe, turbines of more than
80 Newtons can have their maximum thrust level reduced within the ECU, which will in turn reduce
the fuel consumption and thus increase flight time, extending the period between services due to the
lower stress on the turbine yet still give the model superb performance including prolonged vertical
climbs.
• Turbine of 80 – 160 Newton (8 to 16Kg)
thrust
• Retractable Undercarriage set complete
with Wheels/Brakes (F-JSMLG/LRGTRIKE
recommended as this has been designed
specifically for the Xcalibur+)
• Fuel tank (L-JSM002/FT recommended as
this has been designed specifically for the
Xcalibur+)
• Suitable radio system of at least 8 channels
with receiver and battery pack/s of at least
2,400mAh total capacity) Twin battery
packs with battery system/backer are highly
recommended.
• 2 Standard size servos for ailerons of at least
10Kg/cm torque
• 2 Standard servos for rudders of at least
6.5Kg/cm torque
• 2 Standard size servos for elevator of at least
10Kg/cm torque
• 1 Standard size servo for flap of at least
10Kg/cm torque
• 1 Standard size metal gear servo for
nosewheel steering
• 2 Servos for retract and brake valves or 2
electronic valves
• Various extension leads for rudder, elevator,
aileron and flap servos
• Tygon fuel line
Introduction
Required to Complete

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Check the fit of the aileron to the wing panel. If there
is any misalignment the holes in the trailing edge of
the wing can be slotted as required for the hinges.
Run glue into the holes in the trailing edge of the wing
panel and onto the exposed hinges, then fit the aileron
to the wing panel. Wipe away any excess glue,
some tissue or a rag can be used soaked in Cellulose
Thinners or similar to remove the glue cleanly. (Take
great care when using solvents such as these)
Attach the aileron control horn being careful to
position over the hardpoint under the film to give a
secure mounting point.
Install one of the aileron servos to the mounting plate
as shown, then fit a suitable extension lead, long
enough to reach the wing root. Secure the leads
together using a short section of heatshrink, tape or a
lead lock.
Use the pre-installed cord in the wing panel to pull
the servo extension lead though the wing panel, then
screw the aileron mounting plate into place as shown.
Make up the aileron pushrod and fit this, ensuring
that keepers are fitted for security. The slot in the plate
should be trimmed as required to allow free movement
of the servo arm and pushrod. Repeat entire assembly
procedure for the second wing.
Step 1
Step 2
Step 3
Step 4
Step 5

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Hinge the elevator to the tailplane in the same way as
the ailerons were fitted to the wing panels.
Install the first elevator servo onto the mounting plate
in the same way as was done with the aileron servo,
then feed the servo lead through the servo lead tube
built-in to the tailplane.
Make sure that the servo lead is fed out through the
circular hole in the ply plate as shown, then tape the
lead in place until the tailplane is to be fitted to the
tailbooms.
Screw the servo mounting plate into place, fit the
elevator control horn and make up and fit the pushrod
as shown, fitting keepers to the clevises for security.
The slot in the hatch should be trimmed as required to
allow free movement of the servo arm and pushrod.
Repeat the assembly procedure for the second
elevator servo - note that as the servos are fitting in the
same orientation as each other there is no requirement
for one of the servos to be reversed, allowing a single
receiver channel to be used.
Step 6
Step 7
Step 8
Step 9
Step 10

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Fit the rudders to the tail booms, installing the
hinges in a similar manner to that illustrated for
the elevator, note that the rudders are handed
and have hard points for the control horns on
the inboard sides, and the rudder servos are
consequently fitted on the inboard sides of the
booms
Run extension leads through both of the tail booms
for the elevator and rudder servos.
Install the rudder servos as shown, with the output
arm towards the rear of the boom.
Attach the control horn to the rudder and make up the
rudder pushrod in the same way as the elevator
previously, making sure that keepers are
fitted to the clevises for security. Note the angle of
the servo arm at neutral, this is to match the angle of
the leading edge of the rudder, so as to obtain equal
movement in both directions. Repeat for the second
tail boom.
Before you install the retracts we advise you remove
the screws and re-install them using locktite. You can
do this one at a time so you don’t need to disassemble
the retract. Continue this process with the oleo legs
and the wheel hubs.
Step 11
Step 12
Step 13
Step 14
Step 15

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Test fit the main undercarrage and pre-drill the
mounting holes. Use a felt tip pen to mark the sides of
the recess where the air line holes are needed.
Test fit the nose undercarriage and pre-drill the
mounting holes. Using a pen mark two holes for the
air lines.
Remove the main undercarriage and drill the holes for
the airlines as shown.
Remove the nose undercarriage and drill the holes for
the airlines as shown.
Drill or cut a hole as shown in the former alongside
the fuel tank mounting plate, making this large enough
for the air lines and servo extension leads. Repeat for
the other side.
Step 16
Step 17
Step 18
Step 19
Step 20

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Fit the nose retract, having previously connected the
air lines, and run these back into the main equipment
bay.
Install the main retracts, legs and wheels as shown,
running the retract and brake airlines into the
fuselage. Check that the legs/wheels retract fully, a
small amount of trimming of the underside fuselage
skin may be required to achieve this.
Neaten the main brake airlines using electrical tape
and run them as shown. Take care to ensure that the
line will not be pinched when retracted.
Run the airlines under the air intake ducting, then
towards the front of the fuselage through the holes in
the side former made earlier. Secure using tape to
stop rattling and rubbing.
The nosewheel steering servo should be installed as
shown with the output shaft towards the rear of the
fuselage.
Step 21
Step 22
Step 23
Step 24
Step 25

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Holes need to be drilled in the retract bay for the
steering cables to run into the fuselage. Attach the
closed loop cables to the nose leg and crimp firmly to
secure.
Fit the clevises and closed loop adapters to the
centred servo arm and attach the closed loop cables
to the adapters, crimping securely. It can be
helpful to have someone hold the noseleg straight
while you remove slack from the cables.
Install the retract and brakes valves/servos as shown
on the left hand equipment plate, and connect up the
air lines. The fill valve can also be fitted to this plate.
The air tanks are fitted beneath the equipment plates
and are secured in place with some small dabs of
silicon sealant.
Install the flap servo with the output arm towards the
front of the fuselage.
Fit the flap to the fuselage using hinges in a similar
manner to that illustrated for the elevator, hold the flap
in correct position with tape whilst the glue cures, to
ensure free movement without jamming. Connect the
linkage as shown.
Step 30
Step 31
Step 32
Step 33
Step 34

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Prepare the fuel system for the tank as shown – it is
strongly recommended that all fuel lines are safety
wired to all tubes/fittings to eliminate any leakage or
possibility of the fuel lines becoming detached. Note
the use of a felt clunk to eliminate any air bubbles
being passed through to the turbine. Complete
tank assembly and then check for leaks by sealing
the pipes and plunging the tank into hot water to
pressurise. If any leaks are found they can be sealed
with a drop of cyano or 5-minute epoxy.
Fit the fuel tank and retain with a small amount of
servo tape onto the mounting plate and two heavy
duty cable ties – tighten these snugly, but do not
overtighten, as the fuel tank may be damaged. Glue a
short length of brass or aluminium tubing through the
bottom of the fuselage and connect the overflow pipe
from the tank to this.
Mount the turbine being used with self tapping screws,
note the use of a FOD guard. The fuel and kerostart
lines should be run down one side of the fuselage with
the electrical cables run down the other side.
Install the header tank (if used) towards the front of the
fuselage as shown, in this case the tank was secured
to a ply mounting plate using servo tape and cable
ties, with the plate itself being attached to mounting
rails using small self tapping screws. As nose weight
will be required unless a very light turbine is being
used, ensure that as much of the heavy equipment as
possible is mounted as far forward in the fuselage as
is possible whilst ensuring easy access.
Install the ECU on the left hand side of the fuselage on
the equipment plate. Secure using double sided tape
to dampen vibrations and a cable tie. Fit I/O board.
Step 35
Step 36
Step 37
Step 38
Step 39

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Install the receiver on the right hand equipment plate
using double sided tape and neaten the wiring using
cable ties.
Install the switch and regulator/power system (if used)
in front of the receiver, ensuring easy access to the
switch when the canopy is removed.
ECU and receiver battery packs should be mounted
as far forward as possible to reduce the amount of
nose weight required. Do make sure that the nose
moulding will still fit correctly when the battery packs
are installed.
The right side equipment plate carries the receiver,
switch and power system, note also that the fuel tubing
from main to header tank is secured along the plate,
and the run of the overflow tube from the main tank to
the brass tube glued through the fuselage underside.
Typical layout of equipment shown from the right hand
side, note the forward position of the relatively heavy
fuel pump, just ahead of the header tank.
Step 40
Step 41
Step 42
Step 43
Step 44

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Use the following control throws as a starting point, when you have experience and are comfortable
with the model then you can increase or decrease them to suit your flying style.
Aileron: 20mm each way at the tip of aileron,
with 40% exponential
Elevator: 27mm each way at tip of elevator, with
20% exponential
Rudder: 60mm each way at base of rudder, with
no exponential
Flap: 50mm deflection for take off
130mm deflection for landing
Control Throws

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The balance point of the Xcalibur+ is 195mm
back from the leading edge at the root of the
wing panels, this should be measured with the
undercarriage extended and with any header
tank (if used) full.
Balancing the Xcalibur+
We recommend the use of a long runway for first flights, particularly if this is the first jet model you
have flown. The Xcalibur+ a good sized model with a matching performance, so it can cover a
great deal of sky in flight – having a long runway and plenty of available air space makes the early
flights much safer and more enjoyable.
Do carry out thorough range checks before flying, both with the turbine shut down and running,
and check for any radio interference caused by the turbine, throughout the rpm range. Also check
all the controls, ensuring that they operate in the correct direction and with the correct movements,
and that there is no slop or lost motion in any of the linkages. Check that all clevises and ball joints
are secure. Any clevises being used must have keepers fitted for added security. Finally check the
retracts to make sure they are operating correctly and that no air leaks have developed.
Once happy, refill the fuel and air tanks, and once the turbine is running check that it will hold full
power without any air appearing in the fuel lines which could then result in a flameout on take-off.
Taxi the model out to the runway being used – although flap can be used for take off we suggest
that this is not done for first flights. If the nosewheel is correctly trimmed then no rudder application
Flying Notes
195mm

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should be required during the early stages of the take off run unless taking off cross wind, and once
at flying speed a small amount of up elevator is all that is required to allow the model to lift off,
whereupon we suggest that the landing gear can be retracted and the model allowed to climb to
circuit height. Once at a comfortable height power should be reduced, as the model will quickly
build speed being a clean low drag airframe, generally around half power is ample to maintain a
comfortable cruise speed.
Fine trimming can now be carried out, and once the model is correctly trimmed we suggest that a
few handling manoeuvres are performed at a safe height, for example turns in both directions, slow
flight, a clean stall, etc, etc. When happy with the handling of the model it is recommended that the
model be slowed down, the undercarriage lowered and flap applied into landing configuration and
a simulated landing approach is flown at a safe height, so that descent rates and flight attitudes at
various throttle setting can be observed. With this completed the model can be flown through basic
and advanced aerobatics until it is time to land.
The Xcalibur+ is a fairly simple model to
land, a normal approach should be flown
to stabilise the model and slow it enough
to lower the undercarriage, once aligned
with the runway the flap can be lowered in
stages until full flap is applied – note that
more power will be required due to the
increased drag of the flap. You will find that
the Xcalibur+ is very stable in the landing
configuration and it should be relatively
simple to position the model for an accurate
touchdown, the stability once on the ground
being excellent due to the wide track of the
main wheels. If new to turbines then it is
wise to fly a few landing approaches at a
safe height to become used to the relatively
slow acceleration of turbines and the descent

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•Completelychargeyourtransmitterandreceiverbatteriesbeforeying.
•Carefullycheckyourmodelovertoensurethatallscrewsaretightandeverythingiswellbonded.
•Double-checktheCentreofGravity.
•Checkthecontrolsurfacesforboththecorrectthrowanddirection.Ensurethateachsurface
moves freely, without any binding.
•Ensurethecomponentsaresecure.
Always carry a fully charged Co2 fire extinguisher and ensure that it is to hand whilst starting or
operating any turbine powered model.
Always fly the Xcalibur+ in a safe location at a recognised club. For further information on flying in
the UK, please contact:
British Model Flying Association (BMFA)
Chacksfield House, Tel: [phone]
31 St Andrews Road, Fax: [phone]
Leicester. LE2 8RE www.bmfa.org
Pre-Flight Checks
rate of the model, this will reduce the likelihood of the model ending up too low and too slow on
final approach, with power coming on too late to arrest the descent and resulting in an off runway
landing.
Due to the relatively light wing loading of the Xcalibur+ and the clean design it is a pleasure to fly
through most aerobatics, and rolls, loops, spins etc are all easily performed, as can be slow flight,
particularly as the tank empties and the model weight reduces. The model is also very stable and
smooth to fly and we hope that you enjoy flying your Xcalibur+ as much as we enjoyed test flying
the prototypes and pre-production models!

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Always Fly Responsibly and Safely.
Distributed to your local model shop by:
Ripmax Ltd., 241 Green Street, Enfield, EN3 7SJ. United Kingdom
Made in China