Roy Lewallen wrote:

Spike wrote:

Can this be the same idiot who thought that a spring/damper
combination was the mechanical equivalent of a coil and capacitor, on
the grounds that they both exhibited resonance?

from
Aero Spike

I'm that idiot. Actually, one of the very many. The equations for the
two systems are identical.

Roy Lewallen, W7EL, ROW, ASI
(Reg's Old Wife and now Aero Spike's Idiot. The titles just keep
accumulating. Of course I'm also a proud member of the OFC.)

Posting under the sock-puppet "Airy R. Bean", he said the following
quoted below, and to which I was referring. I leave it to you to spot
the glaring error. I very much doubt you said anything like this.

The original message was posted in sci.physics at 9:53 am on 21st
January this year.

"Reactance is characterised by the storage of energy.

In the case of the capacitor, you might think that your
AC source is the only voltage source in your circuit, but
after the first 1/4 cycle, the capacitor acts as a voltage source
and starts to give back the energy that it has stored.

The combined result of the two voltage sources, your
AC excitation and the capacitor itself, accounts for
the out-of-phase current waveform.

(This bothered me for years! How could the current
be non-zero if the AC driving voltage was zero?!)

The same analogy applies to springs and to shock absorbers;
the spring stores energy when stretched; the shock-absorber
stores energy when compressed. Both the spring and shock
absorber will return energy at some time and this exhibit reactance!"


from
Aero Spike