Choice of materials was also left open and we evaluated commonly available materials including aluminium oxide (“ceramic”) fuel cell tubes used in the fuel industry.
Problems included how to make a one-piece assembly from headshell to counterweight.
The result is a single unitary piece of arm technology which is lightweight but extremely stiff.
The force required to bend the Cobra would deform most commercially available arms, including titanium and magnesium arms, and would seriously damage multi piece arms.
The key to the Cobra’s arm stiffness is its shape and choice of materials.