<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD><TITLE>Re: [simpits-tech] Viperpit.org SSC project a success.</TITLE>
<META http-equiv=Content-Type content="text/html; charset=windows-1252">
<META content="MSHTML 6.00.2800.1276" name=GENERATOR></HEAD>
<BODY>
<DIV><FONT face=Arial color=#0000ff size=2><A
href="http://www.simpits.org/cgi-bin/ikonboard/ikonboard.cgi">http://www.simpits.org/cgi-bin/ikonboard/ikonboard.cgi</A></FONT></DIV>
<BLOCKQUOTE>
<DIV class=OutlookMessageHeader><FONT face="Times New Roman"
size=2>-----Original Message-----<BR><B>From:</B>
simpits-tech-bounces@simpits.org
[mailto:simpits-tech-bounces@simpits.org]<B>On Behalf Of</B> Marv De
Beque<BR><B>Sent:</B> Friday, January 23, 2004 12:21 PM<BR><B>To:</B>
Simulator Cockpit tech list<BR><B>Subject:</B> Re: [simpits-tech] Viperpit.org
SSC project a success.<BR><BR></FONT></DIV><FONT face=Verdana>Forum?
What forum?<BR><BR>Marv<BR><BR><BR>On 1/23/04 8:09 AM, "Craig Rochester"
<johncraigroch@msn.com> wrote:<BR><BR></FONT>
<BLOCKQUOTE><FONT face=Verdana><FONT size=2>Marv,<BR><BR>Thanks for the
compliments. Noticed the link for the mechanical deflection amplifier
got chopped
of:<BR>http://pages.zdnet.com/johncraigrochester/sitebuildercontent/sitebuilderpictures/ssc_base_02_flex_bar.jpg<BR></FONT><BR></FONT><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.
:-(<BR></FONT></FONT><FONT face=Verdana><BR></FONT><FONT size=2><FONT
face=Arial>Craig R.<BR></FONT></FONT><FONT
face=Verdana><BR><BR>-----Original Message-----<BR>From:
simpits-tech-bounces@simpits.org<BR>[mailto:simpits-tech-bounces@simpits.org]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>>
http://pages.zdnet.com/johncraigrochester/sitebuildercontent/sitebuilderpictur<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>>
[mailto:simpits-tech-bounces@simpits.org]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>>>
[mailto:simpits-tech-bounces@simpits.org]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>>>>
[mailto:simpits-tech-bounces@simpits.org]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>>>>>
http://falcon24.users.btopenworld.com/ssc05.jpg<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>>>>>
_______________________________________________<BR>>>>>
Simpits-tech mailing list<BR>>>>>
Simpits-tech@simpits.org<BR>>>>>
http://www.simpits.org/mailman/listinfo/simpits-tech<BR>>>>> To
unsubscribe, please see the instructions at the bottom of the
above<BR>>>>> page.<BR>>>>>
Thanks!<BR>>>><BR>>>>
_______________________________________________<BR>>>> Simpits-tech
mailing list<BR>>>> Simpits-tech@simpits.org<BR>>>>
http://www.simpits.org/mailman/listinfo/simpits-tech<BR>>>> To
unsubscribe, please see the instructions at the bottom of the above
page.<BR>>>>
Thanks!<BR>>>><BR>>>><BR>>>>
_______________________________________________<BR>>>> Simpits-tech
mailing list<BR>>>> Simpits-tech@simpits.org<BR>>>>
http://www.simpits.org/mailman/listinfo/simpits-tech<BR>>>> To
unsubscribe, please see the instructions at the bottom of the above
page.<BR>>>> Thanks!<BR>>><BR>>>
_______________________________________________<BR>>> Simpits-tech
mailing list<BR>>> Simpits-tech@simpits.org<BR>>>
http://www.simpits.org/mailman/listinfo/simpits-tech<BR>>> To
unsubscribe, please see the instructions at the bottom of the above
page.<BR>>> Thanks!<BR>>><BR>>><BR>>>
_______________________________________________<BR>>> Simpits-tech
mailing list<BR>>> Simpits-tech@simpits.org<BR>>>
http://www.simpits.org/mailman/listinfo/simpits-tech<BR>>> To
unsubscribe, please see the instructions at the bottom of the above
page.<BR>>> Thanks!<BR>><BR>>
_______________________________________________<BR>> Simpits-tech mailing
list<BR>> Simpits-tech@simpits.org<BR>>
http://www.simpits.org/mailman/listinfo/simpits-tech<BR>> To unsubscribe,
please see the instructions at the bottom of the above page.<BR>>
Thanks!<BR>><BR>><BR>>
_______________________________________________<BR>> Simpits-tech mailing
list<BR>> Simpits-tech@simpits.org<BR>>
http://www.simpits.org/mailman/listinfo/simpits-tech<BR>> To unsubscribe,
please see the instructions at the bottom of the above page.<BR>>
Thanks!<BR><BR>_______________________________________________<BR>Simpits-tech
mailing
list<BR>Simpits-tech@simpits.org<BR>http://www.simpits.org/mailman/listinfo/simpits-tech<BR>To
unsubscribe, please see the instructions at the bottom of the above page.
Thanks!<BR><BR>
<HR align=center width="95%" SIZE=3>
</FONT><FONT
face=Monaco><TT>_______________________________________________<BR>Simpits-tech
mailing
list<BR>Simpits-tech@simpits.org<BR>http://www.simpits.org/mailman/listinfo/simpits-tech<BR>To
unsubscribe, please see the instructions at the bottom of the above page.
Thanks!<BR><BR></TT></FONT></BLOCKQUOTE><FONT
face=Monaco><TT><BR></BLOCKQUOTE></TT></FONT></BODY></HTML>