NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Hybrid Artificial Horizon
From: Bill B
Date: 2008 Sep 13, 00:33 -0400
From: Bill B
Date: 2008 Sep 13, 00:33 -0400
George Huxtable wrote > > But the big problem, as I see it, is to avoid the trapping of air bubbles at > the under surface, and for that I have no solution. Perhaps a photographic film-development wetting solution, the purpose of which I recall was to reduce surface tension and allow water to flow off washed film as a sheet before/while drying so water spots did not form on the film. No chemist here, but there seems to short and long polymer chain dish detergent, the later if memory serves is illegal to use when washing a dry-sailed boat hull before racing. I recall a bubble formula for kids (or the occasional old kid ;-) making gigantic soap bubbles used glycerin and Dawn soap. I m not certain what the glycerin actually did (perhaps counter to what Ken wants?), but it is a thought. Also, does the float need a bottom? It could be open if the containing vessel was deep enough, which would eliminate the bottom surface, and leave only vertical surfaces submerged that would be less likely to trap and hold air bubbles. Another thought, if you are handy with a table saw, is constructing the float box (open bottom) top and sides from Plexiglas the same size as the mirror. Using solvent cement on the plexi seams would eliminate the uneven nature and resulting balance problems caused by uneven application inherent with thickened adhesives in basement/garage glue ups. Bill B. --~--~---------~--~----~------------~-------~--~----~ Navigation List archive: www.fer3.com/arc To post, email NavList@fer3.com To , email NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---