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    Re: AH: windproof shades material
    From: Igor S.
    Date: 2021 Mar 18, 15:52 -0700

    Modris, Greg,

    Thank you for your answers. It's getting warmer and warmer outside, so I can check it very soon. I have already got a pint of used motor oil from a local auto service



    2021 Mar 17, 12:19 -0700Date:
    Modris FerstersFrom:
    Re: AH: windproof shades material

    Hi, Igor!

    According to my own experience normal glass does not has both surfaces absolutely paralel each other. When I want to achieve maximum accuracy using artfical horizon I use home made wind shade. The frame  is made of carton (but it may be made of all available materials)  and the cover is made  from ordinary food film. This membran is very, very thin and therefore the rays passing throug the film are not disturbed. Of course, the film should be streched and then fixed in place by adhesive tape. I made my shade not in shape of prism (as it can be seen in your attached pitcure) , but insted of it I used curved upper surface.



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