C/G = 95mm from Leading Edge root

C/G = 95mm from Leading Edge root
Typhoon 2M Instruction Manual
Who is that ugly bar-steward?
Typhoon is a CNC machine moulded, CAD designed slope model aircraft. This
plane has had a development period of over 2 years, and four separate
models to evolve into the highly agile thoroughbred that you now own. We
hope you have a lot of fun with it.
James D. Hammond PhD, DBA – designer
RCRCM Aeroteam, proud manufacturers.
Please unpack the plane carefully making sure that you have retrieved all
of the small parts.
Don’t throw the box out until you are 100% sure it’s empty!
Check that all the parts are supplied.
If any are missing please contact your vendor immediately.
Typhoon 2M parts
Before construction
Start with a clean workbench and cover it with some foam, or a soft thick
cloth to protect the finish of the wings and fuselage as you work.
Be careful not to place the wings or fuselage on any screws or tools etc
that can dent or scratch the skin.
Be very careful using epoxy and CA so that you don't get any on to the
surfaces of the model during assembly.
You can tick off the bullet points on this instruction manual if you want to
follow it to the letter.
Remember - check twice – cut once!
Wing Construction
I always begin with the wings because it gives that “already half done”
First, do a dry assembly to make sure that the entire plane fits together
well. If the carbon joiner seems too tight – it probably is not. They tend
to loosen a little after a few flights – but adding some floor or car wax can
help if it is particularly stiff.
Check the control surfaces to make sure that they have enough “up”
If not, then open up the controls surface to expose the wipers, then
carefully sand the hinge joint inside a little and try again.
When you are happy, use an air gun or similar to blow the sanding dust
Install the control rods on each surface using the control horns that are
already installed. Check that they don’t bind in any way.
Control rod installed
Check for enough movement
Sand the hinge inside if not enough
Next, make up control rods and clevises using the parts supplied.
The flap rods should be about 65 mm and the ailerons about 45 mm
including clevis length - but check before you cut!
Make sure you have adjustment at both clevis ends!
Control horns for ailerons and flaps
Zero the servos by using your R/C unit.
Remember! Aileron servo arms can be set to 90 degrees, but the flaps
need to have about a 20 degree offset towards the leading edge and set at
+ 35 degrees.
Make up your own, or use the RCRCM wiring harness and check continuity
before installing.
I use a thin piece of piano wire to thread through the wing plug holes to
tape the wiring harness to pull it into position, servo plugs first.
When the wiring harness is positioned inside the wing and accessible,
servos can be installed.
First, check the position of the servos to make sure they are all
symmetrical (In the same place) in each wing.
Install the control rods on to the servos and check that they do not bind,
are snug but not too loose or to tight.
Tape the control surfaces flat with masking tape.
Assemble the completed set of servos, and control rods.
Note that the Typhoon is a little tight for servos room so no servo mounts
are included. Instead the servos need to have a couple of turns of
masking tape wrapped around them so that they can be glued in without
When you are satisfied that you have the correct position for the servo –
glue them in using a slow set epoxy, or thick Cyano. Don’t use 5-minute
epoxy because it will probably let go – at just the wrong time! Be careful
not to use too much glue otherwise you might restrict movement of the
servo arms.
When cured and secure, connect the servos to the wring harness and
check for zeros, then for free and adequate movement. Adjust using the
clevises if needed. (See the control settings section a the back of this
manual for control movements)
Finally, check the fit of the servo hatch covers and sand if not snug.
Then put some double sided tape on the underside and install all on to
the servos hatches.
Fuselage construction:
Rudder and elevator controls:
The elevator carbon snake or carbon rod should be already connected
to the machined elevator bellcrank and bearing assembly. Check that
it moves smoothly. If not, some Teflon spray will normally free it up.
Be careful with this if you use it. It’s quite possible to make it
impossible to glue anything to the fuselage!
Do a trial assembly with the tailplane halves and check for smooth
OK? Now for the rudder.
First remove the control rod or snake inner.
Attach the clevis to the rod with thick cyano, and when cured – test
that it is very well secured by pulling on it as hard as you can!
Next, insert and epoxy the rudder control horn into the rudder.
Just like this!
Thread the control rod or snake back into the fuselage using the
rudder fairing hole.
Connect the rudder control horn to the control rod and check for
movement and range.
Right OK?
Left the same?
If the right rudder movement is not enough then its back to sanding
those damn hinges!
Adjust until you have enough movement – should be about 30mm
each way – more if you can get it.
OK, rudder and elevator back ends done!
Servo tray:
Note: The servo tray as supplied is a blank plywood plate. The reason for
this is that these days there are so many servos available and each flyer has
his/her favorites. It is impossible to make a generic servo plate with holes
that fit all. So we decided to supply a high quality plywood blank that can be
cut to fit any installation.
OK, let’s get on with the next bit.
• First sand the edges to a gentle curve to fit snugly inside the fuselage
in the position you like then cut the servo/switch holes remembering
to put the servos where the snakes can easily reach them without
sharp bends.
• .Now fit the servos and adjust the height of the tray to best connect
the servos to the snakes.
• When you have it right and square, pencil a line where it fits on both
sides of the cockpit wall.
• Now sand a chamfer all along the sides, maybe 3mm deep. This will
help the epoxy to bond it to the fuselage sides.
• OK, now remove the servos and tack cyano the tray into the fuselage.
• Check it again!
• If it’s OK then slow-set epoxy it in.
• After the epoxy has set, you might like to apply a coat of varnish or
paint to keep moisture out.
Another bit done!
Installing the rudder/elevator pushrods or snakes to the servos
Set the rudder and the elevator to zero and tape them that way.
Install the servos and use your RC unit to set them to zero.
Then simply cut the snakes to fit, remembering to leave space for
the adjustment clevis.
Check for movement and adjust accordingly.
Installing the wiring harness
Use the RCRM wiring harness or make your own.
Check continuity!
Check that the wiring harness connectors fit snugly into the
fuselage connector holes.
If not…file the holes out until they do.
Thread the plugs through into the fuselage and rout the receiver
plugs to the receiver area.
Put in the receiver and battery temporarily and make sure the
whole shebang actually works!
Now cyano the connectors into the holes.
Done! neat huh?
Battery Installation
I made a couple of formers to keep the battery with holes in them so that
I could use tie wraps to keep it in one place. It gets really boring when
you are flying inverted and the battery ejects…
Nose weight (Note that the photos are for the Vector III but exactly the
same procedure applies.)
This can be custom made or just fishing weights etc
Here we will deal with the custom made version
First, fill a paper (not plastic!) cup with sand – not too wet, just
damp. Alternatively an antique bone china coffee cup will do.
There, see the impression of the nose?
Then push the nose of the plane into the cup about 2 inches (50mm)
and take it out to leave an impression or mould.
Using your wife’s best saucepans, melt about a pound (0.5KG) of
lead and then – careful! Stand as far away as possible and use eye
protection! – pour the lead into the mould.
When its set (give it at least 5 minutes) bung it into the sink and
cool it with water:
Not too bad! Cool maybe?
Now for the last part:
Trial fit the nose weight into the fuselage. Note that you can fettle it
with a hammer if it’s a bit too big:
Bit of a banger huh?
Now fully assemble the plane and test the CG at 80mm to start.
Add or remove weight until the plane balances correctly.
When satisfied, epoxy the nose weight in.
Important note: Whatever you do, never make the nose weight too heavy –
its better to have a slightly underweight nose with a bit of lead added than it is
to have to drill out lead from a too heavy nose.
Wow – it flies!
Crikey – they work too!
Now you might need the last bit:
Control surface movements and CG settings
C/G = 80 mm from Leading Edge to start. Move back slowly in small
increments to further improve control responses.
Control surface settings: (All measured from the outboard trailing edges)
Ailerons = + 7 mm, -5 mm
Flaperon = +/- 8 mm
Rudder = As much as possible
Elevator = +/- 10 mm
Crow- Flap = As much as you can get.
Crow-Aileron = +7 mm
Crow-Elevator compensation = -4 mm
Thermal or Cruise flap = -2 mm
Thermal or Cruise Aileron = -1mm
Ailerons/flaps reflex up = 1-1.5mm
Finally, thanks to Denis Wittner whose photographs I have shamelessly
stolen for use here!
Pilots notes:
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