After gluing the rear framework to the front section the longerons are cut ¾ through at the “break” point and carefully cracked to allow them to be pulled onto the rear formers keeping the sides straight. On many aircraft, the Elf for example, the sides aren’t straight; they are pulled in at the rear and allowed to take up the natural bow imparted be the spring of the wood. I used a variation of the “3 pins method” to ensure a straight fuselage i.e. in this case the front formers had marks drawn on the centre line instead of pins.
The framework is made from 1/8th square spruce; when working with this wood I’ve found that the glue takes a lot longer to set, even cyano takes its time!! So it’s essential to use lots of clamps and leave everything to set completely before removing them.
At this stage the rear fuselage is quite flexible, not to say fragile, but with a few more biscuits it’ll firm up.
Barry
Strange they’re called biscuits, in the woodwork industry a biscuit is an elliptical shaped piece of wood that is glued into slots cut in two pieces of wood to strengthen a butt joint, very similar to what we have here but significantly different.
Richard
The colour will be PC10 and “natural” linen.