Search found 663 matches

by mtskull
Sat Jun 24, 2017 12:46 pm
Forum: Bluebird Rebuild
Topic: The Vulcan XH558 & General Aviation Thread
Replies: 979
Views: 829163

Re: The Vulcan XH558 & General Aviation Thread

You then run the risk of a partial drop.. i.e. One leg dropping and the other two staying up. Then your in a world of hurt. In my most humble opinion better to belly land than try with one leg lowered. Maybe so in some tailwheel aircraft but with a tricycle configuration, received wisdom has always...
by mtskull
Sat Jun 24, 2017 9:09 am
Forum: Bluebird Rebuild
Topic: The Vulcan XH558 & General Aviation Thread
Replies: 979
Views: 829163

Re: The Vulcan XH558 & General Aviation Thread

Apparently it does have two pumps as you'd expect, and when the Green one failed, the Red one failed to supply pressure, likewise the RAT. I'm very surprised that there isn't a last resort manual pump or, at very least, a cable or linkage system by which the pilot could directly release the uplocks...
by mtskull
Wed Jun 21, 2017 7:52 am
Forum: Bluebird Rebuild
Topic: The Vulcan XH558 & General Aviation Thread
Replies: 979
Views: 829163

Re: The Vulcan XH558 & General Aviation Thread

...and that Spitfire was already having engine runs today, yay! Just a few dented panels, but fortunately, no shock loading of the engine then. I haven't seen a video of the incident but, judging by the state of the propellor blades, it appears that it was windmilling rather than under power when t...
by mtskull
Sun Jun 04, 2017 9:36 am
Forum: Bluebird Rebuild
Topic: The Vulcan XH558 & General Aviation Thread
Replies: 979
Views: 829163

Re: The Vulcan XH558 & General Aviation Thread

The book has already provided the answer to my earlier ponderings as to why you need to be travelling at 90 knots to successfully eject at ground level in the Mk4 seat. I was wrong, it has nothing to do with the canopy; it is so that the parachute opens in the slipstream, as the ejection charge does...
by mtskull
Sat Jun 03, 2017 10:49 pm
Forum: Bluebird Rebuild
Topic: The Vulcan XH558 & General Aviation Thread
Replies: 979
Views: 829163

Re: The Vulcan XH558 & General Aviation Thread

My copy of "The Man in the Hot Seat" arrived today. Made the mistake of starting to read it straight away and haven't been able to put it down since.
Nigel, thank you again for the recommendation.
by mtskull
Tue May 30, 2017 1:09 pm
Forum: Bluebird Rebuild
Topic: The Vulcan XH558 & General Aviation Thread
Replies: 979
Views: 829163

Re: The Vulcan XH558 & General Aviation Thread

As you know, the 'canopy breakers' take the form of explosive charges in the canopy material that shatter it milliseconds before the seat leaves the aircraft, ensuring the ejection isn't impeded. Presumably the Sea Vixen didn't have this - hence the need to jettison the canopy manually. Please don'...
by mtskull
Tue May 30, 2017 6:25 am
Forum: Bluebird Rebuild
Topic: The Vulcan XH558 & General Aviation Thread
Replies: 979
Views: 829163

Re: The Vulcan XH558 & General Aviation Thread

quicksilver-wsr wrote: Mon May 29, 2017 6:38 pm I'd be surprised if it didn't have zero-zero seats, even though on this occasion they weren't used. The Sea Vixen was withdrawn from squadron service in 1972 while the first test of a zero-zero seat in this country with a human occupant took place as far back as 1961
I have done a little homework, courtesy of the excellent Martin Baker website. The ejection seat fitted to the Sea Vixen was a Martin Baker Mk4, the operational minima of which are zero altitude/90 Knots IAS.

Interestingly, one of the differences between the Mk4 seat and the first "zero/zero" seat (the Mk7), was the addition of "canopy breakers" On the Mk7, to facilitate ejection through an un-jettisoned canopy.
Maybe I am over thinking this but, if the reason for the 90 Knot minimum is simply the need to get the canopy clear before ejecting, then jettisoning the canopy early, in anticipation of a low speed ejection, would be a very sensible thing to do; it must be painful trying to eject through a canopy in a seat that wasn't designed for it....

Nigel, this has sparked my interest in the subject. Thank you for your reading recommendation; I have just ordered a copy. 😀
by mtskull
Mon May 29, 2017 4:37 pm
Forum: Bluebird Rebuild
Topic: The Vulcan XH558 & General Aviation Thread
Replies: 979
Views: 829163

Re: The Vulcan XH558 & General Aviation Thread

Mike Bull wrote: Mon May 29, 2017 1:38 pm The canopy is mid-air in the first photo
So it is! Didn't spot that at first glance. Doh!
by mtskull
Mon May 29, 2017 12:06 pm
Forum: Bluebird Rebuild
Topic: The Vulcan XH558 & General Aviation Thread
Replies: 979
Views: 829163

Re: The Vulcan XH558 & General Aviation Thread

I am not a pilot but initially, instinctively thought a touch down on the grass might have done less damage, but I guess is more risky because of a possibility of digging in. The pilot showed great skill here though. In the not very distant past when I was flying for a living, emergency procedures ...
by mtskull
Tue May 23, 2017 1:11 pm
Forum: Bluebird Rebuild
Topic: Technical Talk
Replies: 915
Views: 735994

Re: Technical Talk

Not technical talk as such, but does anyone have a copy of The Record Breakers by Leo? I can't seem to find mine but I know that somewhere in the back there's a reference to K7 resting in 140ft of water. Any chance someone can dig that out and quote it for me? It's for a little writing project I ha...