© 2020-06 glattCAD Flugmodelle Info@glattCAD.de
Christoph Glatt Bauernstr. 77 86462 Langweid am Lech
Concept.
A Concept?
Initially
there
was
no
concept.
Ins
-
tead,
glattCAD
Model
Aircraft
developed
in
2005
out
of
the
con
-
viction
from
making
better
use
of
the
daily
rail
travel
time
to
and
from
work.
This
is
how
a
series
of
high-quality
3D
CAD
designs
for
RC
aircrafts
and
components
have
been
created
in
the
„Regional
Express“
from
Augsburg
to
Munich
with
the
notebook
on
the
lap.
Permanently
there
are
impro
-
vements,
modifications
and
new
projects
going
on.
It
was
soon
noticable
that
in
t
h
e
end
of
developing
an
RC
model
on
the
computer
there
would
be
a
real
airworthy
prototype
in
turn
to
be
tested,
flown
and
improved.
As
a
result,
manuals,
social
media,
a
website,
a
CNC
machine,
expanded
manufacturing
possibilities
and
many
things
more
had
been
demanded.
The
name
changed
from
„glattCAD
Flugmodelle“
to
„glattCAD“
with
the
subti
-
tels
„Flugmodelle“
or
„Model
Aircraft“.
This
was
due
to
the
increasing
interest
in
the
work
outside
Ger
-
many.
Project Choice.
The
main
focus
in
the
selection
of
historical
aircraft
is
mainly
on
types,
which
are
rarely
found
on
our
model
airfields
and
on
the
market.
This
means
that
modellers
-
and
pilots
(!)
-
who
are
interested
in
the
semi-scale
and
scale
replica
of
historical
aircraft
models should feel addressed.
Characteristics.
glattCAD
RC
Models
with
typical
fuselage
lengths
or
spans
between
2
and
3
meters
can
be
carried
by
car
easily
.
Such
dimensions
can
be
handled
with
a
manageable
amount
of
effort
from
an
assembling
point
of
view,
therefore
they
are
perfectly
suited
for
spontanious
evening
flights.
Despite
the
high
quality
and
exclusivity,
glattCAD
Model
Aircraft
are
still
affordable!
With
eight
and
fourteen
serial
lithium
polymer
cells,
D.H.
88
Comet
and
Me-209
V1
are
ideal
for
modern
electric drives.
Both
can
also
be
powered
with
combustion
engines.
Therefore
special
motor
panels
and
components
are
available,
too.
For
the
Me-209
V1
assembly
kits
have
also
been
specifically
designed
for
the
installation
of
the
2-
and
3-cylinder
in-line
motors
Kolm
IL100V4
and
Roto
RM130FSI.
The
He-162
Salamander
can
be
fired
either
by
an
electric
ducted
fan
(EDF)
or
by
a
120 .. 160 N jet engine.
CAM belongs to CAD.
Modern
3D
CAD
software
enables
the
design
of
complex
free-form
shapes,
half-timbered
and
geo
-
detic
structures.
Parametric
modeling
can
be
used
to create fantastic structures.
Obviously
there
is
a
lot
of
work
to
do
before
feeding
the CNC router with the components data!
What
is
unusual
about
all
glattCAD
wooden
designs
is
the
aesthetics
of
the
structure,
which
is
unlikely
to
be
found
anywhere
else
on
the
versatile
RC
model
building
market
and
which
is
particularly
characteri
-
stic
of
glattCAD
Model
Aircraft:
The
combination
of
uncompromising
functionality
with
the
beauty
of
playful detail solutions.
RC
model
flight
brings
joy
to
us
-
this
is
a
self-evident
truth.
But
model
building
in
this
surprisingly
diffe
-
rent
form
results
in
a
new
way
of
playing
our
pas
-
sion!
"You were actually supposed
to cover glattCAD Model
Aircraft with transparent
foil only!"
Flying Characteristics.
In
addition
to
a
good
translation
of
dimensions
and
details
of
the
original
flying
machine
into
the
model,
good flight characteristics are at least as important.
Using
software-supported
polars
determination
(wing
and
empennage
airfoils)
and
vortex
lattice
analysis
(airfoil
distribution
over
the
model´s
wing
-
span)
calculations
on
the
flight
characteristics
are
made
right
at
the
start
of
CAD
development.
All
model
parameters
like
inherent
stability/neutrality,
various
flight
speeds
and
the
flaps
effects
are
con
-
cerned.
The
results
are
incorporated
into
the
CAD
design.
Hence
the
mathematics
of
fluid
mechanics
and the model design are linked iteratively.
In
this
way,
it
is
quite
possible
to
equip
models
of
historical
aircraft
with
tame
flight
characteristics.
Even
if
their
man-carrying
originals
are
said
to
have
bitches and peculiarities.
Build Manuals.
D.H. 88 Comet
Me 209 V1
gearCONTROL.846
Manual
PC Application
V1.1.0
Puzzleing along a Build Manual.
The
"assembly"
is
more
like
a
puzzle,
in
which
each
piece
fits
into
the
other,
than
the
building
a
classical
Graupner
or
Robbe
model
kit
from
the
80s
or
90s.
But
in
contrast
to
a
vintage
puzzle
consisting
of
many
pieces,
where
long
searches
are
often
requi
-
red
before
parts
finally
find
their
correct
places,
there
is
one
crucial
difference
with
glattCAD
Model
Aircraft:
The
comprehensive
illustrated
manual:
a
small masterpiece in itself.
The basic principles of the colorfully designed glatt-
CAD build manuals are simple:
•
Less text, more illustration.
•
Split into seperate manageable steps.
•
Every part owns its number.
•
Parts still appearing coloured in one construc-
tion step will be shown grey in the next steps.
An Example…
… taken from the manual for the glattCAD Me-209
will explain this.
Based
on
two-dimensional
three-view
sketches,
cutaways,
blueprints
and
drawings
from
museums
as
well
as
on
many
photos
of
the
aircraft
pattern
and
its
details
(walk-arounds),
the
computer
initially
creates
a
precise
three-dimensional
free-form
sur
-
face
model
of
the
aircraft
envelope.
Behind
this
is
a
mathematical calculation model called NURBS.
Starting
with
the
specified
requirements
for
the
model´s
static
and
dynamic
flow-theoretical
para
-
meters,
e.
g.
level-flight
speed,
landing
speed,
inherent stability (or neutrality),
a
specific
software
program
calculates
a
first
appro
-
ximation
for
wing
airfoils,
airfoils
distribution,
angle-
difference
of
incidence
and
center
of
gravity.
These
results
flow
iteratively
back
into
the
envelope
sur
-
face design thus starting the process in a loop.
The
homogeneous
free-form
surfaces
created
in
this
way
serve
as
virtual
cutting
tools
for
the
deve
-
lopment
of
fuselage
bulkheads
(frames),
wing
ribs,
tail
ribs,
spars,
a.s.o.
-
in
short:
all
components
in
contact
with
the
outer
shell
of
the
model.
The
later
thickness
of
the
plane's
balsa
covering
is
taken
into
account.
CAM
processes
follow.
Now
all
planar
model
com
-
ponents
need
to
be
transfered
onto
flat
virtual
surfaces,
representing
the
computer
counterparts
of
the
real
plywood
boards,
balsa
slats,
fiber
glass
or
carbon
sheets
to
be
milled.
The
CNC
preparation
of
the
three-dimensional
assemblies,
i.e.
master
models and molds, is also pending.
Finally,
milling
paths,
speeds
and
other
strategies
for
the
CNC
machine
are
developed
and
optimized.
The
machine reliably does the rest.
glattCAD Model Aircraft
Building is Simple!
A
look
into
the
Comet´s,
Heinkel´s
or
Messer
-
schmitt´s
build
manuals
reveal
a
variety
of
screens
-
hots
taken
from
the
CAD
development.
The
functions
behind
the
components
shown
there
can
-
not
always
be
catched
immediately.
So
how
long
will
it take to build such a complex RC model?
Actually glattCAD Model Aircraft are easy to build!
Nearly
any
sanding
of
parts
is
needed
(apart
from
the
full
balsa
covering).
Sanding
will
only
be
requi
-
red
when
two
pieces
do
not
have
to
be
glued
together
in
right
angles
-
thanks
to
precisely
defined
dimensions for all mortise & tenon parts.
Speaking
of
glueing:
It
is
almost
possible
to
assem
-
ble
an
entire
fuselage
or
wing
on
its
jig
without
having
consumed
a
single
drop
of
glue
yet.
The
well-
concieved
design
with
its
numerous
mortises
and
tenons
ensures
an
incomparable
stability
of
the
structure.
By
the
way,
the
auxilliary
jigs
on
which
fuselage,
wings,
horizontal
stabilizer
and
rudders
are
built
do
not
need
to
be
glued
or
screwed
to
the
construction
table.
You
can
freely
move
your
project
from
your
shop to any other place at any time.
The two parts R79 (left and right) are glued between the
frames already mounted.
Parts R79 are now turned to grey. R33 (left and right)
and R78 are glued in.
Again, the newly installed parts are now shown in grey.
Five more formers are inserted into small martises in
the jig.
By the way, no adhesive is required for this step.
He 162 Salamander
Fuselage
Empenn.
Wings