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The pictures on the previous page are computer simulations. This is a picture of the rear frame before the carbon fibre is applied:-

It shows an assembly of five n/c machined cores of non-compressable foam (DIAB Divinicell HP80 80Kg/m3), slotted and then glued into four 3D-printed LPE SLS Aluminide load-bearing supports. It is then intended that the assembly is fixed to a wooden jig (that can be wheeled into a wooden curing oven) before eight layers of carbon fibre (Advanced Composites Group VTM266 /CF0100 283 gsm 3k 4 x 4 Twill) are applied.

The assembly is then to be vacuum-bagged to a vacuum of 980mBar, using a vacuum pump sold to car afficionados for fixing carbon fibre sheets to car-bonnets, and wheeled into a wooden oven for the 16 hour curing at 65 Deg C. The carbon fibre chosen has a low curing temperature, so the wooden oven can be heated by paint stripper guns sold to professional painters, which have temperature controls on the hot-air outlets.

The computer model used has 154 separate parts and 642 separate items, and a zipped .stp takes up 48.7 MB, so I am unable to put it on this website which is restricted to 22 MB total. However it is possible to strip out the chain and derailleur parts, which I needed to do anyway for FEA analysis. Further details of the stripped model and FEA analysis.