Archived posting to the Leica Users Group, 2007/08/22
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]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 >> >> __ > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information >