Concept.

A Concept?

Initially there was no concept. Instead, glattCAD Model Aircraft developed in 2005 out of the convic - tion 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 improve - ments, modifications and new projects going on. It was soon noticable that in the 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 manufactu - ring possibilities and many things more had been demanded. The name changed from „glattCAD Flugmodelle“ to „glattCAD“ with the subtitels „Flugmodelle“ or „Model Aircraft“. This was due to the increasing interest in the work outside Germany.

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 interes - ted 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 geodetic structures. Parame - tric 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!
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 crea - tes a precise three-dimensional free- form surface model of the aircraft envelope. Behind this is a mathema - tical calculation model called NURBS. Starting with the specified require - ments for the model´s static and dynamic flow-theoretical parame - ters, e. g. level-flight speed, landing speed, inherent stability (or neutra - lity),
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 characteristic 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 buil - ding in this surprisingly different form results in a new way of playing our passion!

"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 cha - racteristics are at least as important. Using software-supported polars determination (wing and empennage airfoils) and vortex lattice analysis (airfoil distribu - tion over the model´s wingspan) 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 concerned. The results are incorporated into the CAD design. Hence the mathematics of fluid mechanics and the model design are linked itera - tively. In this way, it is quite possible to equip models of historical aircraft with tame flight characteristics. Even if their man-car - rying originals are said to have bitches and peculiarities.

Build Manuals.

D.H. 88 Comet

Me 209 V1

He 162 Salamander

gearCONTROL.846

Manual

PC Application

V1.1.0

glattCAD Model

Aircraft Building is

Simple!

A look into the Comet´s, Heinkel´s or Messerschmitt´s build manuals reveal a variety of screenshots taken from the CAD development. The functions behind the components shown there cannot always be cat - ched immediately. So how long will it take to build such a complex RC model? Actually glattCAD Model Aircraft are easy to build!
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 consis - ting of many pieces, where long searches are often required before parts finally find their correct places, there is one crucial difference with glattCAD Model Aircraft: The comprehensive illus - trated manual: a small masterpiece in itself.
The basic principles of the colorfully designed glattCAD build manuals are simple: Less text, more illustration. Split into seperate manageable steps. Every part owns its number. Parts still appearing coloured in one construction step will be shown grey in the next steps.

An Example…

… taken from the manual for the glattCAD Me-209 will explain this.
a specific software program calcula - tes a first approximation for wing airfoils, airfoils distribution, angle- difference of incidence and center of gravity. These results flow iteratively back into the envelope surface design thus starting the process in a loop. The homogeneous free-form surfa - ces created in this way serve as vir - tual cutting tools for the develop - ment 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 pla - nar model components need to be transfered onto flat virtual surfaces, representing the computer counter - parts of the real plywood boards, balsa slats, fiber glass or carbon sheets to be milled. The CNC prepa - ration 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 optimi - zed. The machine reliably does the rest.
Nearly any sanding of parts is nee - ded (apart from the full balsa cover - ing). Sanding will only be required when two pieces do not have to be glued together in right angles - thanks to precisely defined dimensi - ons for all mortise & tenon parts. Speaking of glueing: It is almost pos - sible to assemble an entire fuselage or wing on its jig without having con - sumed a single drop of glue yet. The well-concieved design with its nume - rous 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.
© 2020-06 glattCAD Flugmodelle Christoph Glatt Bauernstr. 77 86462 Langweid am Lech Info@glattCAD.de
© 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

He 162 Salamander

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.