19 Jan
2017
19 Jan
'17
7:30 a.m.
On Wed, 18 Jan 2017, Jon Elson wrote:
If there's only one mirror, he's missing most of it then. A Wide Angle
Collimator (what they call the "single channel" displays) has a
partially-reflective first surface mirror at a 45 degree angle (the beam
splitter) and a special curved mirror directly in front of it. The
display is positioned above the beam splitter. The light path goes down
Well, the aviation community is just INSANE over
liability. And, since the
outfit that makes the wing marker lights gets sued many times when a light
plane goes down, even though the cause was pilot error, engine failure,
instrument failure, running out of fuel, etc. they STILL get sued.
So, I can imagine maybe some plane goes down, and they'd get sued because the
pilot trained on an uncertified simulator that was cobbled together after a
surplus purchase.
While I agree that aviation is fed on by lawyers, that wouldn't have been
a reaons for Boeing's actions in this case.
The simulator would have had to have been re-certified by the FAA (and they
might not have grandfathered it a 2nd time) in order for any pilot to have
logged time in it. No instructor pilot that's rated ATP or higher for
that type would instruct on it without that certification.
It would be
interesting to try if nothing else. The LCD may not throw
enough light out to make it readable in a WAC. Not sure.
It would work FINE! His
sim was a box, so you were in quite dark conditions.
Some LCDs can actually get pretty bright, and his CRT was not unusually
bright. So, I'm sure it would work fine. These are SMALL mirrors, not for
the giant wall-size displays, and direct-view.
So, the CRT is facing up, the mirror above it, and you just look into the
mirror through about a 2' x 2' aperture. Perfect for a home simulator. from the crt, is reflected off the beam splitter into
the mirror and then
straight at the viewpoint for the user (passing through the
beam splitter
again). That process robs 50-75% of the light that goes into it from the
CRT. That's why WACs are really only good for night time visuals.
Here's an example of what a four channel WAC looks like:
http://flightweb.simpits.org/BehindTheScenes/737sim_page4.html
Take a look at the "Go Collimated or Go Home" link in my sig. I designed
a 737-sized one of those for a friend. He built it and uses it with
FlightGear.
g.
--
Proud owner of F-15C 80-0007
http://www.f15sim.com - The only one of its kind.
http://www.diy-cockpits.org/coll - Go Collimated or Go Home.
Some people collect things for a hobby. Geeks collect hobbies.
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