Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 9/5/84; site mordor.UUCP Path: utzoo!watmath!clyde!burl!ulysses!mhuxr!mhuxt!houxm!mtuxo!mtunh!mtung!mtunf!ariel!vax135!cornell!uw-beaver!tektronix!hplabs!qantel!dual!mordor!@S1-A.ARPA,@MIT-MC.ARPA:mcgeer%ucbkim@Berkeley From: @S1-A.ARPA,@MIT-MC.ARPA:mcgeer%ucbkim@Berkeley Newsgroups: net.space Subject: Re: Re: IMAX and the Shuttle flights Message-ID: <2524@mordor.UUCP> Date: Fri, 5-Jul-85 23:56:59 EDT Article-I.D.: mordor.2524 Posted: Fri Jul 5 23:56:59 1985 Date-Received: Thu, 11-Jul-85 05:48:43 EDT Sender: daemon@mordor.UUCP Lines: 10 From: Rick McGeer (on an aaa-60-s)All you really need to solve the problem is two motor-driven counter-rotating reels, one mounted adjacent to each of the film reels. Let's call these the counter-reels. They have some (constant) mass, so you vary their angular momentum by varying their angular velocities appropriately. This can be done either by computation base on the amount of time the camera has been operating, or can be controlled by simply measuring the net angular momentum of the system and adjusting velocities appropriately.