RBC kits Spitfire MKI User manual

Thank you for purchasing Spitfire MKI from Rbckits
For the first time, R/C enthusiasts we have a choice in scale and fun flyer aircraft designs.
Our goal, through computer technology and state-of-the-art production techniques, is to offer aircraft
which in the past have not been modelled simply because they weren’t popular enough to justify mass
production. Our production techniques allow us to produce aircraft which, though not as popular and
well known as P-51s and P-47s, still offer historical significance (good or bad!), Good looks and flying
characteristics, and a uniqueness that is sure to turn heads wherever you take your airplane!
Your airplane has many unique features in its design:
CAD Design
CAD design allows strength to be built into the airplane without sacrificing weight. Accurate parts
design and placement ensures a perfect fit.
CAD Drawn Plans
The plans in this kit are not copied from a master set! They are originals drawn directly from the CAD
program where the airplane was designed. We do this because it allows us to use colour, which helps
you better visualize the various components of the airplane, and we can use better quality paper,
which greatly reduces the possibility of shrinkage.
Since you’re going to build directly on the plans, they ought to be the proper size! Also, parts
placement is guaranteed to be accurate, so you can build a better, straighter model.
Small and hard-to-produce parts are simply a computer file away, so you get a more accurate airplane.
Lightening Holes
Lightening holes are cut into all ribs and formers where possible and justified. This allows us to keep
the weight on each plane to a minimum without sacrificing strength.
The same program that generates the design and plans also drives the cnc cutter, so every part is
reproduced exactly as it was designed. cnc cutting also allows us to fit more parts on each sheet of

wood, reducing the waste, and lowering the cost to you.
Plastics
The cowl and dummy motor are accurately reproduced high quality Polystyrene
General Building Information
The Spitfire MKI can be built by a person with average building skills. It is designed for someone who
has built a trainer or low wing sport plane. No unusual building techniques are required, although
more difficult areas are explained in detail where necessary. Certain steps in the building process must
be followed as depicted, or you might find yourself digging back into the structure to redo something.
These areas are outlined when necessary. Occasionally hints will be included at certain building steps.
These are not required for completion, rather they are tips intended to ease a particular process. The
cnc router does cut through the wood, As a result of this, occasionally there will be fraying on the
surface of the wood. This is normal, and is only a surface problem and does not affect the wood in any
other way. Similarly, the cnc settings are optimized for wood thickness averages, so occasionally, due
to variations even in individual sheets, some areas might not cut through completely. Simply use care
in cutting the parts from the sheets; most of the time, the parts will break out of the sheets!
Hardware and a motor mount are not included in the kit. There are so many choices for quality
hardware that these choices are left to the individual preferences of the builder, rather than include
something in the kit that you’ll probably throw away anyway.
This aircraft is not a toy. It must be flown in a responsible manner according to the rules set forth by
Law. The builder assumes the responsibility for the proper assembly and operation of this product.
Rbckits shall have no liability whatsoever, implied or expressed, arising out of the intentional or
unintentional neglect, misuse, abuse, or abnormal usage of this product. Rbckits shall have no liability
whatsoever arising from the improper or wrongful assembly of the product nor shall it have any
liability due to the improper or wrongful use of the assembled product. Rbckits shall have no liability
for any and all additions, alterations, and modifications of this product.
Having said that, turn the page and start building the best airplane kits on the market!
Material you might need:
Balsa knife, Stanley knife, straightedge, building board 1500mm
ca glue medium, thin, thick you need approx. 6 bottles, building nails, tape
Or use white glue, and canopy glue, epoxy for the canopy and cowls
Some drilling and bending tools, wire cutter, safety goggles etc. etc.
For finishing you need:
glass 25 gram 3mtr and filler dope 1 litre, brushes sanding paper, paint of your choice
Wheels as on the drawing, controls, motor, battery etc.
All vacuumformings should be roughened up before gluing

Check the 3d pdf and pictures for additional information, a picture says more as a 1000
words
Wings:
Start with a flat building board with the size for the wing and fuselage
Place the drawing of the wing on the building board and protect it with plastic.
Start by making the bottom sheeting from the supplied balsa sheet, place the sheets on the work plate
and nail them down , use cello-tape to connect the edges, take them of and glue the edges with thick
ca , place on the work plate and sand down the glued edge, turn the sheet over and take of the cello
tape and sand the edges, now there will be one smooth side and a lesser smooth side , this is because
of the thickness of the balsa is not even, the non smooth side will be the inside of the sheeting.
take out all ribs and formers out of their sheets , you can mark the formers with a soft pencil if you like
, sand of all holding tabs.
Join main formers and place rib doublers , check the drawing for the correct position of the doublers
and or retract formers.
Mark the main-formers ribs on the bottom sheeting, place main-formers on sheeting place ribs , do

not glue yet , make sure for straightness .
if all seems ok then pin down the main former and start glueing the ribs with thin ca one by one to the
bottom sheeting, note roll the ribs over the sheeting and apply ca
Place trailing edge to the end of the ribs to the bottom sheeting.
Place sub leading edge to the bottom sheeting and to the ribs.
Do this the same for the other side of the wing., sand the sub leading edge to the ribs .
Make the mid sheeting from the supplied balsa , important is that the mid piece is straight so support

the sheeting when glueing the ribs and formers to it, place sub leading edge and sub ribs.
Place the trailing edge from 2x12 balsa sheet, place also some scrap balsa before the trailing edge to
support the wing fasteners
Place aileron formers from 10mm balsa in the ribs by taking out a small piece of the rib , place scrap
balsa fill in the horn and hinge positions

Place servo and wires into the wing , place servos on extra 1,5mm balsa , we shrinked the servo in
shrinking foil and ca them to the bottom sheeting, with a fill on top, make also a opening for the servo
arm in the bottom sheeting.
Do not forget to mark the position of the aileron on the bottom sheeting , by sticking through a balsa
knife , this is a lot easier
Now make the mid piece of the wing by supporting it with a help-former so the bottom is level to the
building board and sheet the top carefully, measuring to the ribs from the outer wings .
Now pin down the outer wing panel on the X marked spots , Place the small help-formers as displayed
on the drawing , make them from leftover 8mm , important is that they all have the same height, this
will give the correct washout, place then under the trailing edge as per drawing and pin down the
trailing edge .
Place the 1,5 cnc cut trailing edge top sheeting S12 to the wing with ca or white glue, note that this
sheeting locks down the washout of the wing

Note that a centre line is drawn over the main-former that is the edge for the nose sheeting, as the
wing is elliptical, so place the nose sheeting and after that place the mid-sheeting between trailing
edge and nose sheeting.
do this the same for the other wing half .
Clean up the edges of the wing and place leading edge
sand leading edge to shape as per plan , place wing-tips and take out ailerons and sand edges as per

plan.
use the supplied hinges for the ailerons they are easy and do perform very well.
Choose your retracts and open up the bottom sheeting for taking the retracts and wheels .Place wing
dowel .

Fuselage :
Make the main crutch and place on building board , let the front over hang at the edge of the building
board to take nose formers.
place formers as per drawing, make sure for straightness ,place bottom sheet over formers and sand
to shape.
make the side sheeting as per plan a bit oversize and glue to side of fuselage to the stringer and
formers .
place wing seat plywood , use wing for test fitting .

Test fit wing and place fairing formers and sheeting drill holes for wing retainers
place fairing sheeting , place top-formers and sheet side with balsa
Finish fuselage by placing all sheeting and fairing formers and sand to shape ,
Place cowl and glue to formers and sand fuselage to match the cowl.

Stabilizer:
Make the stabilizer from the cnc cut parts glue and sand to shape .
Place the fill parts to the fuselage and place stabilizer assembly to the fuselage , make sure for
straightness. fill and sand the edges of fuselage and rudders.
Place hinges make sure for smooth movement in conjunction with the steering cables and horns.

Spinner :
cut the edges of the spinner and backplate but leave a few mm standing for lining out the spinner
Place the spinner backplate formers with ca in the backplate with help from the 4mm dowels.
Make opening in spinner for your prop, the template gives a bit of lead to the shape.Place spinner to
backplate , now you see why the edges need to be there , the spinner edge rest on the backplate , this
is very precise drill holes to take the 2,2x9mm screws and screw the spinner to the backplate , it
should run straight now .. Yes ? else do it again .
Make the tail wheel assembly as per drawing , make the controls steering with z-bends , this is a dead
sure connection.
Place the canopy with ca , but first clean the canopy with window cleaner and use gloves , grease
makes the canopy fog , do not forget a pilot .
Place other vacuum formed parts as per drawing use ca and do sand the parts very well

Finishing:
The whole airframe is covered in 25gr glass and doped with filler dope, DO NOT USE SHRINKING DOPE
EVER.
Filler dope is not too hard to sand, and filled with some extra talcum sand great and smooth, when
ready a thinned layer of sanding dope is OK
Now finish with... Vallejo, humbrol or we used cheap spray cans... take care for the vacuumformings
as some paints will not hold as good.
Canopy:
Cut oversize.. And test fit to fuselage, glue with canopy glue, or ca and make it lively with pilot, radios,
etc. The canopy framing can be painted on
Have you found an error in the drawing or parts or instructions, just mail us at [email protected]
I am sure we can find a solution for your build.
Have Fun with the Spitfire MKI
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