Präzisions-EWD-Messgerät Graupner 64 Precision incidence gauge for the demanding model flyer. CNC-machined aluminium parts for maximum possible precision. Eloxided surfaces emphasise the high-quality appearance of this measuring device, and provide optimum surface protection. The engraved measurement scale allows the user to read the values to an accuracy of 0.25°. The measuring device is easily converted to cope with different wing chords within the range 50 to 250 mm. The special Registered Design provides an extremely accurate method of reading the angle of incidence, and works particularly well with V-tails.