Archived posting to the Leica Users Group, 2018/05/04
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Hi Howard, When I was scanning all of my negatives, more than 10 yrs ago, I was using an early Minolta scanner, and someone on one of these lists had an APS adapter, which he graciously loaned to me so I could complete the task.? I don't recall who it was, and I no longer have the scanner.? Sorry. As for the drive motors, that system was once said to be the most horsepower ever applied to a single shaft.? It originally consisted of two 83,000 HP synchronous motors and two 25,000 HP wound rotor induction motors, for a total of 216,000 HP.? The starting sequence originally involved liquid rheostats.? After I retired, I understand that they replaced the WR motors with two 30,000 HP synchronous motors, brought up to speed by a variable frequency starting system. In that tunnel complex, the ducting is limited to two atmospheres.? Some of the von Karman Facility smaller tunnels operate at much higher pressures with much more? impressive bolts and flanges. Jim Nichols Tullahoma, TN USA On 5/4/2018 10:24 PM, Howard L Ritter Jr wrote: > That?s a beautiful and fascinating set, Jim. I wish I had a better > recollection of AEDC from my ROTC summer-camp visit there in ?67. > > I had a fling with APS too, still have my Canon EOS-IX APS SLR here on the > shelf in my study, and lots of (inaccessible) rolls of developed film in > the drawer. Any idea whether it?s possible still to get these scanned? > > The nameplate on the electric motor is fascinating ? 13200 V @ 2750 A! > That means the resistance of the windings is less than 5 Ohms. Given that > there must be hundreds of meters of wire in the windings, the conductors > must have the gauge of a garden hose. With a PF of 100%, the 13200 x 2750 > x sqrt(3) VA works out to some 62 MW or 83000 hp at the shaft. > > For comparison, the four MerMaid electric propulsion pods of the Queen > Mary 2 together at full steam draw 80 MW or only about 30% more than what > this motor draws! I?d guess that this motor alone could power the QM2 at > the economical speed with which we crossed the Atlantic in 2013. The > ship?s power plant produces less than twice the power that this motor > consumes. That is one H of a motor! > > The ducting for the tunnel looks like any old industrial stuff?until you > notice the gauge of the steel stock, and the sheer number of bolts on the > flanges. That was built to take SOME pressure! > > ?howard > >> On May 4, 2018, at 15:19, Jim Nichols <jhnichols at lighttube.net> wrote: >> >> I appreciate all of the responses to my posting of APS images. One LUGGER >> who responded off-list asked if I had any more of these APS images. In >> reviewing my images from 1986, I found another set. >> >> Normally, cameras are not allowed on-base at Arnold Engineering >> Development Center, where I spent 39 years. But, in 1986, the base held >> an open house for employees and their families. Displays were set up >> showing items of interest, and cameras were permitted. I took advantage >> of this opportunity to capture a few images to which I had not had access >> previously. I am almost positive that the Kodak APS camera was my choice >> that day. >> >> The Propulsion Wind Tunnel Facility is composed of two 16-ft wind tunnels >> and one 4-ft wind tunnel, along with the plant equipment to support them. >> The main drive system for the large tunnels originally had 216,000 HP on >> one shaft, and has since been upgraded. Here is a view of the compressor >> for the transonic tunnel. >> >> http://www.gallery.leica-users.org/v/OldNick/20070917-1986+Open+House_+16T+Compressor+from+Across+the+Street.JPG.html >> >> That red & white stack is 200 ft tall. >> >> This is the nameplate on one of the two largest motors. >> >> http://www.gallery.leica-users.org/v/OldNick/20070917-1986+Open+House_+PWT+Large+Motor+Nameplate.JPG.html >> >> This is one of the numerous auxiliary compressors that support the tunnel >> operations. >> >> http://www.gallery.leica-users.org/v/OldNick/20070917-1986+Open+House_+PES+F-Unit.JPG.html >> >> At the time of the open house, a lot of store testing was being done in >> the transonic tunnels and three neat models were on display: >> >> http://www.gallery.leica-users.org/v/OldNick/20070917-1986+Open+House_+A-10+Test+Model+from+16T.JPG.html >> >> http://www.gallery.leica-users.org/v/OldNick/20070917-1986+Open+House_+FB-111+Test+Model+from+16T.JPG.html >> >> http://www.gallery.leica-users.org/v/OldNick/20070917-1986+Open+House_+F-16+Test+Model+from+16T.JPG.html >> >> The little Kodak APS camera did its job! >> >> -- >> Jim Nichols >> Tullahoma, TN USA >> >> >> _______________________________________________ >> Leica Users Group. >> See http://leica-users.org/mailman/listinfo/lug for more information > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information >