I just finished up decalling my Hurricane, and there is a marking that is curious. The marking is a box with W in the upper left hand corner and a T in the bottom right corner separated by a diagonal line. They appear at various places on the wings and fuselage, any help?
My first thought was wireless transmitter. But then you said all over the wings and fuselage and i ain’t so sure.
I think they put those markings where grounding between components was needed to prevent static electricity from interfering with radio transmissions. Without such grounding when you fly in precipitation the radios become unusable.
They’re inspector’s stamps (stencils, really,) and are normally found on only one side of a component. As jeaton01 says, on fabric-covered aircraft, there had to be an earth connection to electrical components (navigation lights, for example,) and this usually consisted of a strand of wire going through the rudder, wing, etc. These had to connect together, usually at (metal) hinges, to make a complete circuit, otherwise arcing would ensue, which would play havoc with the radio transmissions. Being made of wood, you’ll also see them on the Mosquito.
Edgar
Thanks guys. I figured someone here would know. The Cane should be on her wheels by tomorrow and finished by the weekend.