Gold jewelry that becomes dirty or starts to darken indicates a tarnish film may be on the surface.
Thursday, March 1, 2012
How to: Homemade Swashplates for RCs
The swashplate is an essential part for a remote controlled helicopter, as it helps the user control the helicopter’s roll and pitch. This part fits over the RC helicopter’s main rotor shaft and connects to the cyclic and collective contr...
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