Re: No metal to metal contact - a furphy?

In article <4303EB0D.5B871512@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>,
quietguy <quietguy@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote:

| The reason I asked is because the plane (ARF) it had a metal
| throttle rod connected to the metal throttle lever on the OS61 when
| I built it 2 years ago. It was checked over by experienced club
| guys and passed all tests, including the range test, without any
| problems. Also flew well without glitches etc.

As long as there is a good electrical connection between the two
pieces of metal, there is no problem. And if there is no connection
between two pieces of metal, there is no problem.

It's only if there's a poor or intermittent connection that there's a
problem. And the longer the pieces of metal are, the bigger the
problem, because they're acting as antennas.

A range test doesn't always show the problem, because without the
engine running at full throttle, you don't have the vibrations that
may cause the problem. Or it could be caused by moving the sticks, or
by the plane actually flying.

| The issue came up with a new plane I built recently, and while of
| course I followed the advice the cluey guys gave me and changed to a
| non metal pushrod, I like to understand the why and how of things,
| rather than ONLY follow blindly

Well, in this case there's no need to follow blindly, because it's
very easy to reproduce the problem and convince yourself that it's
real. I mentioned one way of doing so in my previous post.

| Doug McLaren wrote:
|
| > Rather than convincing yourself that it can't happen, show yourself
| > that it does.

Well, you _did_ seem quite busy explaining why you thought it was an
old wives tale :)

--
Doug McLaren, dougmc@xxxxxxxxxx
`I used to have an inferiority complex --- but it wasn't any good'
.

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