Hi Colin,

Here's a pic of the hub I built for my "Gyrator" 1/2A powered gyro. It looks like alum. in the pic but is just painted with silver dope. It's 2 layers of 1/16" ply with .032" PP plastic between as the hinge material and a cut down Tamiya r/c car front wheel used as a bearing hub. I made the hinge fairly wide 'cuz I was worried about flutter. My blades were made from light balsa with a hard balsa leading edge. No flutter so far (he says with his fingers crossed!)