REFLECTOR: Yoke vs. Stick

[Scott Baker]

There is a big difference between true fly-by-wire and that of having an 
electrical trim - namely, when speaking about the electric trim, one still 
has a physical connection between the control stick and the control surfaces 
(be it push rods, torque tubes, or cables).  The consequences of flying an 
aircraft with a broken trim are minor.  The consequences of flying an 
aircraft with a broken fly-by-wire would be akin to flying your Flightsim 
with your Microsoft joystick disconnected.  Fly-by-wire with servos will 
certainly work, we just need to think about back up, double back up, maybe 
triple back up ...and that's where the risk v. cost decisions come into 
play.
My thoughts.
Scott B.

----- Original Message ----- 
From: "Brian Michalk" <michalk at awpi.com>
To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
Sent: Wednesday, December 01, 2004 5:17 PM
Subject: RE: REFLECTOR: Yoke vs. Stick


>I don't think Randy meant to do away with the center stick, I think he 
>meant
> attaching servos to it so that some remote stick could be mounted 
> anywhere.
>
> I don't think this would be any more failure prone than say ... a trim
> system.
>
>> -----Original Message-----
>> From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org]On
>> Behalf Of Jim Sower
>> Sent: Wednesday, December 01, 2004 3:27 PM
>> To: rwharton at buckeye-express.com; Velocity Aircraft Owners and Builders
>> list
>> Subject: Re: REFLECTOR: Yoke vs. Stick
>>
>>
>> Yep.  Then I did about a ten-second cost-benefit and risk-benefit
>> (uncountable failure modes ... with ?? consequences).  Then I moved on
>> to something useful and attainable.
>> Like fixing my broken, poorly designed fuel system for a few bucks ...
>> Jim S.
>>
>>
>> Randy Wharton wrote:
>>
>> >Anyone ever given thought to using servos to drive the existing
>> >control linkages? This "fly-by-wire" system could be joystick-driven
>> >from anyplace you wanted to mount a joystick, and "all" you'd have to
>> >do is run the wires. Granted the joystick controls would probably
>> >cost you, but you could conveniently mount the joystick anywhere.
>> >
>> >Randy Wharton
>> >N248RB XLRG
>> >http://clik.to/velocity
>> >
>> >---- Original Message ----
>> >From: CBarber at texasattorney.net
>> >To: reflector at tvbf.org
>> >Subject: RE: REFLECTOR: Yoke vs. Stick
>> >Date: Wed, 1 Dec 2004 12:39:52 -0600
>> >
>> >
>> >
>> >>My plane came with the yoke (the last SUV, I think, but I have added
>> >>the
>> >>second door, so now an SE).  I have no real desire to switch from the
>> >>yoke
>> >>(even though I think a $1000.00 premium for what many do not consider
>> >>an
>> >>upgrade is hurting more than helping). I too like the idea of flying
>> >>left
>> >>and fiddling right. The loss of panel area is very secondary to me
>> >>(even
>> >>though with the yoke, the big Blue Mountain would probably not fit
>> >>but that
>> >>is ok since the Blue Mountain is not in my budget <g>)
>> >>
>> >>Now, that being said, I do like the idea of a left side stick like
>> >>the
>> >>Cirrus.  I spoke with Brandon and he stated it was considered but due
>> >>to the
>> >>slope of the fuselage the left stick would require too many
>> >>components and
>> >>loose the simplicity advantage.  I think he mentioned it could be
>> >>done, but
>> >>you would have to use u-joints etc which cause some slop in their
>> >>test.  WAY
>> >>down the road and well after I start flying, I would give serious
>> >>consideration to a modification to a left side stick.  BTW, a while
>> >>back
>> >>someone posted pictures of a left side stick.  It was only partially
>> >>in the
>> >>picture since the picture was of the panel. At the time others
>> >>expressed
>> >>interest in the left side stick and hoped more pix of it would be
>> >>uploaded,
>> >>but none ever were.  FWIW.
>> >>
>> >>All the best,
>> >>
>> >>Chris
>> >>
>> >>Christopher Barber
>> >>Attorney and Counselor at Law
>> >>
>> >>"Serving the needs of Senior Texans"
>> >>
>> >>Barber Law Firm
>> >>11930 S Sam Houston Pkwy E
>> >>Suite 103
>> >>Houston, Texas 77089-4755
>> >>281-464-LAWS (5297)
>> >>
>> >>
>>
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