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Post by general on Apr 7, 2018 14:09:57 GMT 12
Gentlemen.
Not long ago I had found a pdf showing details of the deck aft of the pilot's seat, then promptly lost the screen-caps.
It was a B&W shot that seemed to show installation of the ejection seat.
Would anybody have an idea of the rollover structure behind the seat, please?
Most appreciated.
Kind regards
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skyman
Flight Lieutenant
Posts: 82 
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Post by skyman on Apr 7, 2018 19:50:21 GMT 12
Sifting through some 50 years of my memory banks, I do not recall any rollover structure under the canopy transparency aft of the ejection seat of the Canberra B(I)12. The ejection seat drogue container/headrest projected above the lower canopy edge, and there was a longish, low bracket between the ejection seat and the rear of the transparency which I believed secured a part of the canopy jettison mechanism (?). Shorty may have a better recollection regarding this.
Al.
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Post by general on Apr 8, 2018 13:55:43 GMT 12
Thanks, Al.
That sounds more creditable. From what I recall the structure looked more like a housing.
Well-spotted.
Regards
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Post by snaphead on Apr 10, 2018 9:11:30 GMT 12
If I recall correctly , the canopy was held on with 12 explosive bolts. These bolts where aluminium alloy torqued in place My memory of this process is burned into my mind by the fact that as I was torquing the bolts down, someone who had had a curry dropped their guts in the cabin entrance and closed the entance door. The "cracker stackers" installed the explosive charges at the end of the servicing.
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skyman
Flight Lieutenant
Posts: 82
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Post by skyman on Apr 10, 2018 20:40:46 GMT 12
Quite correct snaphead, the canopy was held in place by explosive bolts and twelve sounds about right (it's been a while since I worked on Canberras!). Whether the structure under the canopy behind the ejection seat had anything to do with canopy jettison, I really can't say for sure, as it wasn't part of my trade but once the explosive bolts fired I would have thought something other than cabin pressurization and slipstream would be needed to clear the canopy cleanly from the aircraft (and pilot!). Maybe that structure was the canopy jettison pivot point. An old Canberra framie may know the answer.
Al.
PS - It wasn't me who gassed the cabin.
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Post by snaphead on Apr 11, 2018 10:37:41 GMT 12
No, that was Paddy someone, his surname eludes me. ASF team one, can't recall team leader (one of the McKay's?). Paddy was a short arse, very whitty. I think that was the Canberra that was built uned when MOW built a Tech Library extension under the tailplane which made it very difficult to lower off jacks, the Chippies had to build a set of ramps.
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