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Posted on 12/30/2011 8:12:41 PM PST by EveningStar
It will be a while before the NTSB issues its findings about the crash of The Galloping Ghost at the Reno Air Races this year. There were so many witnesses, however, and photographic and video coverage of the disastrous accident was so clear, that it did not take long for theorizing about the cause to converge on a single scenario.
(Excerpt) Read more at flyingmag.com ...
“that the engine was pulling full power — 105 inches of supercharged manifold pressure — in the final”
That is a lot of boost in anybodys book.
105??!! wow! I thought 30 using turbos was good.
Didn’t know it needed so much trim at full speed. When the trim broke there was a sudden high G (possibly 11) pull up.
Here's the original photo, AS11-40-5868:
Yep.
I remember talking to pit crews in the 90’s and they were remarking that 80 was a lot back then. 105? That’s.... very aggressive.
DOH! Should read, “... The earth was not in the actual photo, and in fact was high in the lunar sky at that time, and all other times at that location.
The moon most certainly was in the actual photo, and it was not high in the sky, it was in fact under foot.
Now, the Earth OTOH...
Additionally the Army insisted on turbochargers for their Allison powered craft, and Allison designed and used a two stage supercharger very successfully.
It is likely the Ghost had two superchargers, maybe three, however the six individual exhaust ports on each side belay the turbos.
For the Army stock P-51's using the two stage superchargers, full throttle would result in high manifold over pressure if the pilot sheared the maximum throttle safety wire. Regs required major engine inspections if a pilot did so.
What the heck is that second picture of?
Always loved that second photo. That’s one of two passes Tex Johnson did barrel rolling a 707 (Dash-80) over a Seattle Air and Water show. He was showing off the plane to the public and reps from various airlines. Now THAT man knew how to sell airplanes. Bet no one at Boeing today has the balls to do that to a 787.
That is the Boeing 707 prototype doing a roll at an airshowe in Seatle in the late 50s
Video here
http://www.youtube.com/watch?v=Ra_khhzuFlE
Regards
alfa6 ;>}
Is that the time the test pilot got called on the carpet for rolling the aircraft?
I believe that’s around double what a WWII-era Merlin ran as boost at war emergency power (i.e., throw the book out the window and shove the throttle to the firewall). That’s a good indication of just what they do to the engines in those unlimited racers, and the stress they’re under.
}:-)4
Bad luck all the way around.
The whole thing was a FAKE!
(just kidding;)
The VIPs in the back didn't even spill their highballs.
According to Tex Johnson the Boeing test pilot he was called in to Mr. Allen’s office at Boeing. Allen being the CEO at the time and asked what he was doing, Johnsdon replied “Selling Airplanes” Allen said well let’s don’t do it again:-)
It’s on the video clip I linked
Regards
alfa6 ;>}
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