[simpits-tech] update

[Erwin Neyt]

Here a short update from the lowlands.
Today I started painting my new simroom, middle grey for the inner ceiling
and light grey on the walls. Half is done....

Getting closer.......

Erwin.

> -----Original Message-----
> From: Brian West. [mailto:bcw@palma.infotelecom.es] 
> Sent: zaterdag 25 januari 2003 15:52
> To: simpits-tech@simpits.org
> Subject: Re: [simpits-tech] Using real instruments
> 
> 
> Hi Craig,
>                 The WW11 era Link Trainers had their 
> instruments vacuum controlled. If you uneathed some old 
> service manuals for these they would likely tell you what you 
> need. If you find some old Link technical literature I would 
> be grateful to see it.
> 
> Best regards,  Brian West.
> 
> 
> -----Original Message-----
> From: Craig Rochester <johncraigroch@msn.com>
> To: simpits-tech@simpits.org <simpits-tech@simpits.org>
> Date: 25 January 2003 04:13
> Subject: RE: [simpits-tech] Using real instruments
> 
> 
> >Ok, I bought the Altimeter.  I took it apart(a delicate task).  It 
> >could definitely be driven by vacuum, but I'm going to try 
> to modify it 
> >to be driven by pressure.  The ASTEK meter I have works by the 
> >expansion of two sealed metal bellows expanding as the atmospheric 
> >pressure decreases at higher altitudes.  I'm going to drill 
> a hole in 
> >each bellows, port them,
> and
> >try pressurizing the bellows.  In theory this will be equivalent to
> applying
> >a vacuum to the outside.  If it works I'll post pics of the results. 
> >Otherwise...anyone interested in a ruined Altimeter? :)
> >
> >Craig R.
> >
> >-----Original Message-----
> >From: simpits-tech-admin@simpits.org 
> >[mailto:simpits-tech-admin@simpits.org]On Behalf Of Craig Rochester
> >Sent: Wednesday, January 08, 2003 8:39 PM
> >To: simpits-tech@simpits.org
> >Subject: RE: [simpits-tech] Using real instruments
> >
> >
> >I'm thinking driving the real instruments from two(2) electronic 
> >regulators would be simpler than modifying each instrument.  
> >Particularly if you were doing a dual pit.  I don't know 
> what the leak 
> >rate is on the VSI, but the rest could be run from a tiny 
> >compressor(and vacuum pump if required). Barometric pressure varies 
> >from 14.7 psia(0 gage pressure) @ sea-level and decreases to 
> about 1.1 
> >psia @ 60,000 feet.  If you could modify or adjust the Air Speed 
> >Indicator and Altimeter to be off-set down by about 15 psi, 
> you could 
> >use pressure instead of vacuum.
> >
> >I know the pneumatic altimeters uses a sealed metal bellows that 
> >expands as the barometric pressure falls with altitude.  The 
> movement 
> >of the bellows
> is
> >converted to dial rotation with gears and levers. Maybe 
> there is enough 
> >adjustment in the works to have the instrument read 60,000 
> feet with no 
> >applied pressure and then output 1-15 psi from the 
> regulator.  Or maybe 
> >a fitting could be fashioned to the bellows and connected to the 
> >regulator.
> >
> >I see electronic pressure regulators on eBay pretty often: 
> >http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=26210&
> item=31051
> >3777
> 0
> >They're called an I/P transducer(eye-to-pee) current to pressure or
> >V/P(vee-to-pee) voltage to pressure transducer.
> >
> >Craig R.
> >
> >-----Original Message-----
> >From: simpits-tech-admin@simpits.org
> [mailto:simpits-tech-admin@simpits.org]
> >On Behalf Of Matt Bailey
> >Sent: Wednesday, January 08, 2003 5:04 PM
> >To: simpits-tech@simpits.org
> >Subject: Re: [simpits-tech] Using real instruments
> >
> >I remember talking about using an air compressor to control 
> real gauges 
> >several months ago. Sounds like a GREAT idea to me, a little more 
> >complex than just using servos but the extra realism in 
> gauge movement 
> >would probably be worth it. Not to mention the utter 
> coolness of being 
> >able to drop a
> REAL,
> >UNMODIFIED instrument directly into your sim. The instruments 
> >themselves
> are
> >pricey though, unless you found an old junk instrument but that would
> defeat
> >the purpose of making your sim accept real instruments since the 
> >instrument would not work. :)
> >
> >Driving gyro instruments like the turn coordinator I suppose 
> could be 
> >done with servos driving the gyro cages (although the ball is just a 
> >ball in a glass tube, it's not driven by any mechanical 
> device in real 
> >life so it would probably have to be totally reworked) or 
> just removing 
> >the gyros completely and hooking a servo directly to the 
> small aircraft 
> >representation. Anyone done this?
> >
> > -Matt Bailey
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> >
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