Archived posting to the Leica Users Group, 2007/08/23
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Jim, I know what you mean by direction of flow! Having flown cross country in a B-57A from Maryland to Alabama and the relief reservoir overflowing, I know why the pilot dropped the full tank on the designers desk at the Glenn L Martin Co.when he returned. Jerry Jim Nichols wrote: > Jerry, > > At least, the venturi made one certain of the direction of flow when > using the relief horn. It appears to be similar to a normal 4-inch > venturi used for many years to provide adequate suction to spin up > artificial horizons and directional gyros for instrument flight. These > have all but disappeared with the advent of engine-driven vacuum > pumps, which are now being replaced with more modern reference > instruments. > > Jim Nichols > Tullahoma, TN USA > ----- Original Message ----- From: "Jerry Lehrer" <glehrer@san.rr.com> > To: "Leica Users Group" <lug@leica-users.org> > Sent: Wednesday, August 22, 2007 8:37 PM > Subject: Re: [Leica] IMG: From the Cigar Box- Al Williams' Gulf Hawk > as Seenin 1972 > > >> Jim, >> >> I can almost guarantee that the Hamilton-Standard prop shown on the >> plane is not the original style. >> >> BTW, that venturi must have provided quite a suction in the relief >> "horn"! >> >> Jerry >> >> >> Jim Nichols wrote: >>> On a 1972 summer vacation trip with the kids, probably in Daytona, I >>> came across a collection that included Al Williams' original 1929 >>> Curtiss Wright Gulf Hawk, Serial No. 1, powered by a 650hp Pratt & >>> Whitney radial. It was complete with all conveniences, which >>> included a relief tube venturi beneath the cockpit. >>> >>> In searching to find more info on this airplane, I can no longer >>> locate the place that I visited, and it is probably gone. I believe >>> that the airplane is now in a collection at Dulles. >>> >>> http://gallery.leica-users.org/v/OldNick/Cigar+Box/Gulf+Hawk+1972.jpg.html >>> >>> >>> >>> Comments and critiques welcomed. >>> >>> Jim Nichols >>> Tullahoma, TN USA >>> >>> __ >> >> >> _