Claude Yep clamped pedals and track set up to the nearest 0.1 degree and
checked with eyeball. I'm putting the tape on the blade grip and am using
the DSS. The Pro-Drive did a 180 flip on me and I got mad and took it off
and am using the DSS. I've got 225hrs on the ship and the tail rotor has
about 160. I can't feel any bearing troubles.
Can't see how an out of track blade could cause the ips to increase and the
phase angle to change so much. On the main rotor the out of track generates
vertical vibration and doesn't affect the lateral very much at all.

--
Stuart Fields
Experimental Helo magazine
P. O. Box 1585
Inyokern, CA 93527
(760) 377-4478 ph
(760) 408-9747 publication cell
"claude lescure" wrote in message
...
Hello Stu,
Do you clamp the rudder pedals while doing this? Have you checked the tail
rotor tracking before? where do you put the reflecting tape for your DSS
or Prodrive? How many hours do you have?
Claude.
"Steve R" a écrit dans le message de
news: ...
Hi Stuart & Kathryn,

What kind of helicopter are you talking about here?

Please excuse a wild guess from someone who has "very" little experience
in the experimental world but......... since you're not finding anything
overtly loose in the drive system or tail blades, I have to wonder about
something like a bearing going south on you? It might not be anything
you'll feel just moving a static system round but could start causing
problems when under load. Is there any kind of preload put on the system
during assembly? If so, is it even?

As I said, I'm just guessing here so if I'm totally out of line, please
excuse the reply! ;-)

Best of luck & fly safe,
Steve R.


"Stuart & Kathryn Fields" wrote in message
.. .
Here's one for the pros: I was balancing my tail rotor and had it down
to 0.27 ips and still had just a touch too much weight where I had added
it. So still needing to safety wire a bolt that is located in the center
of the tail rotor output shaft, I chose to safety it to a hole 180
degrees from the weight. The safety wire was small, 0.025, so I didn't
expect to see the ips go to zero, but I hoped they would decrease maybe
to 0.20. Well it didn't. All of a sudden I had 0.9ips, so I shut down
and removed the wire and ran again. This time I got 0.5 ips. The
balancer reading did not even come close to repeating. The phase angle
was also different. In an experiment, I would run up from idle to full
chat and take 4 averaged readings, come back to idle and go up to full
chat again for another 4 readings. Never repeats. Can't find anything
loose in the drive or on the blades. If I pull a set of readings at
2500, 2600 and 2700, all the readings pretty much agree with the
exception of ips increasing a bit with rpm. However if I take it to
idle and come back up, I get a different set.
Any ideas?
--
Stuart Fields
Experimental Helo magazine
P. O. Box 1585
Inyokern, CA 93527
(760) 377-4478 ph
(760) 408-9747 publication cell