[NSRCA-discussion] Futaba and pattern

[J N Hiller]

Guys I don’t believe the mechanical stick centering is absolute enough
especially on a somewhat used radio at least on less than top of the line
transmitters. The detent design and pivot bearings are less than shall we
say industrial quality. Bob, I had the roll-centering problem you described
with my super 7 and felt it was due to stick centering not being equal from
either left or right. I think my 9-C is better but not absolute. I wish I
had one of those little devices that displayed the signal count to verify my
suspicion.
Jim Hiller

-----Original Message-----
From: nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org]On Behalf Of Bob Richards
Sent: Saturday, December 22, 2007 3:37 PM
To: NSRCA Mailing List
Subject: Re: [NSRCA-discussion] Futaba and pattern

Ron,

All I can say is, I flew the Micropro with every intention of competing at
the '93 NATS with it. I had trimming issues with my plane that I could not
tune out. Some flights would be good, some I could not trim the plane for
level flight (slight roll left or right). And, yes, I had taken out all the
throw I could mechanically so I had 100% throws programmed into the radio.
Frustrated, I decided to put my 7UAP in the plane, and it immediately felt
good. That is when I decided to do a little digging and discovered the
resolution issue.

Whenever I mention that 256 is not good enough, I hear all sorts of reasons
why 256 should be sufficient. Yes, once the stick is moved away from center,
256 probably is good enough. But when the stick is at center, the darn servo
better go back to the same position every time. And you need fine resolution
at center so the neutral position can be varied in small enough amouts to
arrive at precisely the desired position.

With a slightly worn stick or pot, the neutral position might be bouncing
between two adjacent steps. With 256 resolution, this can be VERY
noticeable. With 1024 or higher resolution, not nearly as noticeable, if at
all.

Given the outcome of the '93 season with my old 7UAP, I'm glad I switched
out the radios.

Bob R.


Ron Van Putte <vanputte at cox.net> wrote:
Hmmmm, I never thought of blaming my radio's resolution for my bad flying.
Let's see now..........

Ron Van Putte



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