Results 1 to 5 of 5

Thread: Mirror question

Hybrid View

  1. #1
    Forum Moderator JWS's Avatar
    Join Date
    Jan 2007
    Location
    Netherlands
    Posts
    483
    Contribute If you enjoy reading the
    content here, click the below
    image to support MyCockpit site.
    Click Here To Contribute To Our Site

    Mirror question

    Have been thinking about the visuals for my single seat 737. Came across these discussions here. Interesting & daunting. Seen a lot of talk about Mylar. But wondered why nobody seems to have a look at highly polished metal sheets or acrylic mirrors. Too heavy, too expensive or not good enough??Best regards,JWS
    Last edited by JWS; 08-30-2020 at 07:03 AM.

  2. #2
    300+ Forum Addict
    Join Date
    Apr 2008
    Location
    Graham, WA
    Posts
    329
    Contribute If you enjoy reading the
    content here, click the below
    image to support MyCockpit site.
    Click Here To Contribute To Our Site

    Re: Mirror question

    Mylar is really only the practical choice for making the mirror cell of a collimated display. g.

  3. #3
    Forum Moderator JWS's Avatar
    Join Date
    Jan 2007
    Location
    Netherlands
    Posts
    483
    Contribute If you enjoy reading the
    content here, click the below
    image to support MyCockpit site.
    Click Here To Contribute To Our Site

    Re: Mirror question

    Quote Originally Posted by geneb View Post
    Mylar is really only the practical choice for making the mirror cell of a collimated display. g.
    Thanks for your response. Could you elaborate a bit on the 'practicallity' of that choice? I've seen how some people have managed to build a Mylar mirror, but to be honest, it seems to me a very demanding project, that involves lot's of calculations, correctly shaped woodwork or metal frame, vacuumcleaners, airflow regulation, etc. It seems to me that e.g. a polished metal mirror could be easier to handle (if not too big or too heavy), but then again I might be overlooking other problems. At least it is first surface by design.Best regards,JWS

  4. #4
    300+ Forum Addict
    Join Date
    Apr 2008
    Location
    Graham, WA
    Posts
    329
    Contribute If you enjoy reading the
    content here, click the below
    image to support MyCockpit site.
    Click Here To Contribute To Our Site

    Re: Mirror question

    Quote Originally Posted by JWS View Post
    Thanks for your response. Could you elaborate a bit on the 'practicallity' of that choice? I've seen how some people have managed to build a Mylar mirror, but to be honest, it seems to me a very demanding project, that involves lot's of calculations, correctly shaped woodwork or metal frame, vacuumcleaners, airflow regulation, etc. It seems to me that e.g. a polished metal mirror could be easier to handle (if not too big or too heavy), but then again I might be overlooking other problems. At least it is first surface by design.Best regards,JWS
    When correctly used, silvered Mylar will create an optically perfect*, seamless, spherical section mirror. This is why all commercial full flight simulators use Mylar for their mirror cells. Bending a sheet of metal into a spherical section would likely involve some kind of custom made press at an astronomical cost. I also doubt it could be polished even "good enough". * A Mylar spherical section mirror created by a vacuum is as literally perfect a mirror as you can create without going to a multi-ton glass mirror. You can either build multiple single-channel Wide Angle Collimators, or you can build a mirror cell & screen combination using vacuum drawn Mylar. Trying to use other materials simply isn't practical. It's either not good enough (metal) or too expensive (metal or glass). g.

  5. #5
    Forum Moderator JWS's Avatar
    Join Date
    Jan 2007
    Location
    Netherlands
    Posts
    483
    Contribute If you enjoy reading the
    content here, click the below
    image to support MyCockpit site.
    Click Here To Contribute To Our Site

    Re: Mirror question

    Thanks for your further explanation.BRJWS