Jager Hobby expanded polystyrene XPS aircraft modelsSeptember 18, 2018
#Extruded #Polystyrene blocks (XPS) are ideal for all types of modelling from #CNC machinery down to hand-carved sculpturing. XPS can be cut, sanded and shaped easily due to its uniform structure and because it is lightweight yet very strong it is used in a wide range of applications and industries such as: Theatre and film sets, product design and prototypes, art colleges, model makers etc.
How are #Jagerhobby #scalemodel kits designed?
We usually start with a 3 view plan or traditional #Rc# balsa model plan. On models we are unsure of the flying qualities we will also work on a small depron prototype.
From this a #3d Model is created
The #model is then manipulated and Internal structures are added
Once we have added ducted fan mounts and thrust tubes we look at the wing area and structure
We will use a suitable wing section and if required use our experience to increase wing areas . The idea is to build a well flying model.
The model is then “Sliced” in to cross sections
The sliced parts are then arranged in CAD to be cut. The Shapes wont all be straight edges so curves and tapers are added in
The XPS sheet is then cut using a CNC cutter. This cuts the sheets
We now have a set of pre cut parts
The parts are then numbered following the plan and we can start to build
Building the model
Lots of different types of glue work with XPS we prefer a sand able wood glue. MAKE SURE YOU TEST before on an off cut
First we build individual slices of the cross section up. Slots are pre cut in for tube to keep everything square
From there we build up sub structure . Its important to use a little flat weigh and pin the sections as we go
The substructures are then joined together
Its amazing how quickly you have a built airframe
The same process is followed for the wings and tail
Next we will look at sanding covering and finishing
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