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<P><FONT size=2>Marv,<BR><BR>Thanks for the compliments. Noticed the link
for the mechanical deflection amplifier got chopped of:<BR><A
href="http://pages.zdnet.com/johncraigrochester/sitebuildercontent/sitebuilderpictures/ssc_base_02_flex_bar.jpg">http://pages.zdnet.com/johncraigrochester/sitebuildercontent/sitebuilderpictures/ssc_base_02_flex_bar.jpg</A></FONT></P>
<DIV><FONT size=2><FONT face=Arial>I wish we'd move over to the forum. I
don't understand the preference for this email based "list" format.
:-(</FONT></FONT></DIV>
<DIV><FONT size=2><FONT face=Arial></FONT></FONT> </DIV>
<DIV><FONT size=2><FONT face=Arial>Craig R.</FONT></DIV>
<P><BR><BR>-----Original Message-----<BR>From:
simpits-tech-bounces@simpits.org<BR>[<A
href="mailto:simpits-tech-bounces@simpits.org"
target=_blank>mailto:simpits-tech-bounces@simpits.org</A>]On Behalf Of Marv De
Beque<BR>Sent: Thursday, January 22, 2004 7:35 PM<BR>To: Simulator Cockpit tech
list<BR>Subject: Re: [simpits-tech] Viperpit.org SSC project a
success.<BR><BR><BR>Devilishly simple! Now I understand, I think.
You made a mechanical<BR>solution to the differential forces requited to operate
the stick.<BR><BR>Nice work.<BR><BR>Marv<BR><BR><BR>On 1/22/04 6:42 PM, "Craig
Rochester" <johncraigroch@msn.com> wrote:<BR><BR>> The 3 axes besides
pitch-down use a 1/4" rod for a bending beam. The "tube"<BR>> bottoms
out against a<BR>> 0.035" thick piece of feeler gauge stock. Here's a
sketch:<BR>> <A
href="http://pages.zdnet.com/johncraigrochester/sitebuildercontent/sitebuilderpictur"
target=_blank>http://pages.zdnet.com/johncraigrochester/sitebuildercontent/sitebuilderpictur</A><BR>>
es/ssc_base_02_flex_ba<BR>> r.jpg The smaller pitch-down
deflection(0.022") is mechanically amplified to<BR>> actuate the LVDT
about<BR>> the same as the pitch-up(0.17").<BR>><BR>> We haven't done
the hysteresis tests yet. The prototype had about 1% IIRC.<BR>> I'd
guess that Dave<BR>> excellent machining a heat treatment of the components
will reduce the<BR>> repeatability.<BR>><BR>> Craig
R.<BR>><BR>><BR>> -----Original Message-----<BR>> From:
simpits-tech-bounces@simpits.org<BR>> [<A
href="mailto:simpits-tech-bounces@simpits.org"
target=_blank>mailto:simpits-tech-bounces@simpits.org</A>]On Behalf Of Marv De
Beque<BR>> Sent: Thursday, January 22, 2004 5:55 PM<BR>> To: Simulator
Cockpit tech list<BR>> Subject: Re: [simpits-tech] Viperpit.org SSC project a
success.<BR>><BR>><BR>> Tis the beauty of "Male Answer Syndrome".
You simply cry that you are<BR>> disabled. :-)<BR>><BR>> I did
not really look at your final design, but I did remember you had an<BR>> idea
using a bending beam as the main spring system and a secondary beam<BR>> that
amplified the amount of movement at the LVDT slug. Did you choose
that<BR>> design?<BR>><BR>> Also, did you take repeatability
measurements to see if the beam returns to<BR>> center reliably? You
remember all of those headaches I went through. :-)<BR>><BR>>
Marv<BR>><BR>><BR>> On 1/22/04 3:25 PM, "Craig Rochester"
<johncraigroch@msn.com> wrote:<BR>><BR>>> Hey
Marv,<BR>>><BR>>> "...Physiologically, it may be that as you
experience negative G loading that<BR>>> one's physical strength may
alter.<BR>>><BR>>> What do you think?
:-)"<BR>>><BR>>> I don't have a clue. :-) Last time I
speculated on this, I was 100% wrong.<BR>>> ;-)<BR>>><BR>>>
Craig R.<BR>>><BR>>> -----Original Message-----<BR>>> From:
simpits-tech-bounces@simpits.org<BR>>> [<A
href="mailto:simpits-tech-bounces@simpits.org"
target=_blank>mailto:simpits-tech-bounces@simpits.org</A>]On Behalf Of Marv De
Beque<BR>>> Sent: Thursday, January 22, 2004 12:41 PM<BR>>> To:
Simulator Cockpit tech list<BR>>> Subject: Re: [simpits-tech] Viperpit.org
SSC project a success.<BR>>><BR>>><BR>>>
Craig,<BR>>><BR>>> That is a good question and I don't know, but I
agree with your logic.<BR>>><BR>>> Since I don't know, I'll succumb
to Male Answer Syndrome.<BR>>><BR>>> I think our frame of reference
is based on a 1 G environment in a static<BR>>> seating position under
normal physiological conditions. It may well be that<BR>>> under
negative G loading that the torso rides up in the seat and the
pilots<BR>>> ability to push forward on the stick is likewise
diminished.<BR>>><BR>>> Physiologically, it may be that as you
experience negative G loading that<BR>>> one's physical strength may
alter.<BR>>><BR>>> What do you think?
:-)<BR>>><BR>>> Marv<BR>>><BR>>><BR>>> On 1/22/04
7:54 AM, "Craig Rochester" <johncraigroch@msn.com>
wrote:<BR>>><BR>>>> Thanks Marv,<BR>>>><BR>>>>
It has been great fun working with the Viperpit.org guys. A
community<BR>>>> project<BR>>>> where many
people<BR>>>> brought their expertise to bear the
project.<BR>>>><BR>>>> Question Marv, I still don't understand
the design rationale behind the<BR>>>> pitch-down axis(16 lbs.
at<BR>>>> .030"). I have some info that calls for 29 lbs. at
0.030". The higher<BR>>>> value<BR>>>> makes more sense
to<BR>>>> me. I've read that the pitch-down is more susceptible to over
controlling<BR>>>> and<BR>>>> that's why the set
the<BR>>>> smaller deflection. Why would they not use the higher
force?<BR>>>><BR>>>> Thanks,<BR>>>><BR>>>>
Craig R.<BR>>>><BR>>>> -----Original
Message-----<BR>>>> From:
simpits-tech-bounces@simpits.org<BR>>>> [<A
href="mailto:simpits-tech-bounces@simpits.org"
target=_blank>mailto:simpits-tech-bounces@simpits.org</A>]On Behalf Of Marv De
Beque<BR>>>> Sent: Wednesday, January 21, 2004 9:41 PM<BR>>>>
To: Simulator Cockpit tech list<BR>>>> Subject: Re: [simpits-tech]
Viperpit.org SSC project a
success.<BR>>>><BR>>>><BR>>>> Congratulations!
You guys did well!<BR>>>><BR>>>>
Marv<BR>>>><BR>>>> On 1/21/04 9:34 PM, "Craig Rochester"
<johncraigroch@msn.com> wrote:<BR>>>><BR>>>>> Dave
has finished building the rig:<BR>>>>> <A
href="http://falcon24.users.btopenworld.com/ssc05.jpg"
target=_blank>http://falcon24.users.btopenworld.com/ssc05.jpg</A><BR>>>>><BR>>>>>
Dave tested the SSC's performance and we met the specs for the
SSC:<BR>>>>><BR>>>>> Pitch Down 16.0 lbs @ .027" ±
.013"<BR>>>>> Pitch Up 25.0 lbs @ .171" ± .058"<BR>>>>>
Roll 7.7 Kg = 17.0 lbs @ .110" ± .030"<BR>>>>><BR>>>>>
The bench results were:<BR>>>>><BR>>>>> Pitch Down 7.3
Kg = 16.06 lbs @ .030"<BR>>>>> Pitch Up 11.4 Kg = 25.08 lbs @
.170"<BR>>>>> Roll 7.7 Kg = 16.94 lbs @
.118"<BR>>>>><BR>>>>> Will be publishing drawings, BOM,
etc. soon.<BR>>>>><BR>>>>> Craig
R.<BR>>>>><BR>>>>><BR>>>>><BR>>>>><BR>>>>>
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