Aeronautical Instruments & Tools
Price = n/a
Chart Table Plotter Mk II Stores reference 6B/241
Mk II plotting arms were a move on from the integral Bigsworth chart board setup, that we have also just listed. The Mk I & 11 instruments were manufactured using heavier duty black painted brass arms with a rotating 'head' fitted with a Perspex rule attached. The other end of the arm features a clamp system, to lock onto a metal strip fitted to the Navigators plotting table. These were used in a variety of RAF 'heavies' in WWII including the Avro Lancaster and the Handley Page Halifax. This arm is substantially larger and of superior quality to those found on the earlier chart boards, that were useful in the limited space available in light bombers. The Perspex rule measures 12" x 4" (30 cm x 10 cm) and is engraved with a direction of flight arrow. The instrument is complete and remains in excellent issued condition, but with signs of light service use to the paintwork. The central rotating head is nicely marked with a King's Crown Air Ministry property mark and stores reference code 6B/241 (6B being the deignation for Aircraft Navigation Equipment, Accessories and Spares) and the serial number confirms a 1942 production date. Our final photograph attached details a similar arm, mounted and ready for Ops in the Navigator's 'office' in a Lancaster bomber. The RAF chart shown is for illustrative purposes and is not included in the sale but we do have similar available so please get in touch for details.