[Kevmo]

Did he publish a paper on it?

[MHGinTN]

I cannot recall where he published it, but yes, he even attached sworn statements from witnesses.

You might find the following link useful, since it puts into math the 'why' of Bushman's experiment:
http://www.scribd.com/doc/78228592/bernard-haisch-rueda-puthoff-inertia-as-zero-point-field-lorentz-force-1994