Fuselage hull planking Part 1

The planking of the hull consists entirely of 3mm plywood. Some basic research was needed to find out how boards of this thickness can be bent over the hull shape. In addition, each segment must be overlapped with the neighboring segment with a chamfer of 1:15.

The greatest challenge is the precise cutting of the segments before scarving and shaping. Any subsequent corrections are usually associated with a lot of hand sanding work.

For the scarfs, I was able to rely on my proven system with combined dust extraction. After a short adjustment and testing phase, it now delivers perfect scarfs, which still need to be adjusted by hand.
The common method of making plywood malleable is to soften it in steam. For this purpose, I built a box in a dimension that can also accommodate the largest segments. The individual plywood segment is then hung up in it and boiled until soft. To really fill the box with hot steam, I bought a steam generator from sauna supplies. Thermostat, timer, remote control, radio receiver and MP3 connection all included. After about two hours of boiling, the plywood is soft enough to be shaped over the hull.
After being stretched in the final position on the hull for about 24 hours and then allowed to dry for another 24 hours in the open state, the end product is ready for assembly. By now, the first 5 segments have been glued on, and the final shape of the hull is slowly becoming visible.
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