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<TITLE>Re: [simpits-tech] Viperpit.org SSC project a success.</TITLE>
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<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>
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