VC10 Mach .94
Speaking with a retired RAF VC10 flight engineer the other day, he stated that it was possible to cruise the VC10 at M.94. I think the standard was .84/.86.. .. .Can any of you guys out there confirm this although I've no reason not to believe it.. .. .Thanks. .R4R
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In actual fact Mmo was beyond Mach 1. The aircraft is actually overpowered, and with that slender wing the structural limit is the Mmo. The throttles were wirelocked to 98% at the fuel control units to avoid exceeding Mmo, but even so it is possible to attain Mach 1.2 in level flight ;-)
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On my BOAC type training, we took a VC10 to either .91 or .93, I think it was the higher. It had no trouble getting there in level flight, but I do remember high speed buffet was occuring.
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Was once told a story during training by an old BOAC Captain about trying to outrun the fuzzie-wuzzies over Sudan and doing 0.94 in a VC10. Said there was a shock wave starting to develop over the nose!
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Mmo above M1.0......1.2? Me thinks a slight ah.....exaggeration...perhaps been at the red too long?:rolleyes:
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In the past I've cruised across the Pond at M.88 indicated, but such things are no longer permitted. Cruising for optimum payload availability is the holy grail nowadays - and Mno is .866 indicated.
I'm authorised to take the old ladies briefly up to over .9 IMN on air tests, but I recover long before Mne of .94 IMN is reached - and they certainly won't do that in level flight! As for M1.2....err, no. Not possible! |
Hope this one comes out.
Did a test flight in a 747-300 the other day, and took this snap - http://www.billzilla.org/reallyhighmach.jpg No, that wasn't from mach buffet, the blasted camera just wouldn't focus properly. ;) |
Be surprised if the wings didn't fall off the old gal these days....
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A BCal VC10 dropped a boom after being upset by some turbulence over the Andes once. All that happened was a panel dropped off.
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The DC-8 was used for high speed research and during one test, it achieved M1.04 during a high speed dive. It was a -50 I believe. According to the book I read, there was very little buffet, no A/C damage.
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