Stinson running adjustment
I'm not sure which forum this belongs in but it seems historical:
Does anyone have an idea of what is being done in this picture? I cannot find the original photo on the net. The aircraft is a Stinson Junior, and there seems to be some form of grab rail fitted over the cowl, and a 'platform' either side of the nose that the brave 'mechanic' is lying on. https://cimg1.ibsrv.net/gimg/pprune....c1178a9405.jpg |
Perhaps this one on a test flight?
SM-4 Junior 1929 = 2pChwM rg; 300hp Wright R-975. POP: 1 special retractable-gear endurance plane Sally Sovereign developed from SM-1 [X9696]. Damaged in a wheels-up landing after a failed endurance flight (p: Eddie Stinson, Randolph Page). Rebuilt with fixed gear as K of New Haven for an aborted attempt at a US-Argentina non-stop flight on 7/15/30, when the crew became lost in a fog over Georgia and ran out of gas. They bailed out and SM-4 crashed to destruction. Stinson |
Not a Junior - it's the SM-1 Detroiter "City of Chicago" used by the Hunter brothers for their 1930 endurance record flight:
https://www.criticalpast.com/video/6...unter-brothers |
There is more than one photograph of that event.
https://cimg3.ibsrv.net/gimg/pprune....a1ab04aae0.png |
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Had a flight in the right hand seat of an SM-8 Junior about 20 years ago, glad I wasn't asked to do whatever he was doing...
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What he was doing is captioned in my post #4 above.
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Thanks, missed your first pic on me phone...! And Dave's post 3.
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Originally Posted by dook
(Post 10543721)
What he was doing is captioned in my post #4 above.
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I wondered about that too, but it seems they did.
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Thanks everyone.
It appears that this was such a common, and indeed necessary, procedure that the 'access frames' and grab rail were fitted for the purpose of allowing a passenger (hopefully!) to carry out this work. I still find it hard to believe that a spark plug can be changed on a running engine, having witnessed the result of one unscrewing to the end of its thread and zipping off over a hedge, never to be found again- I was following a BSA 441 Victor at some speed many years ago. Regards, Weeds |
It wasn't a passenger.
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Oh, and thanks Dave Reid: I can see now that the large hatch/hole behind the cockpit was where the in-flight refuelling hose was dropped into (and probably food and drink too). I presume that the PNF had to catch hold of it and connect the end to a fitting on a fuel line to the tanks. Brave aviators!
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Where was the Health & Safety manager when all this was going on....???!!!
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Flying the aeroplane !
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Originally Posted by Weeds round the prop
(Post 10543919)
I still find it hard to believe that a spark plug can be changed on a running engine, having witnessed the result of one unscrewing to the end of its thread and zipping off over a hedge, never to be found again-
Not saying I'd like to take on the job though.... |
Changing plugs? Poor maintenance, what about the timing, tappets, oil change. ;)
You're an ace Dave with that link. :ok: Hand starting. https://cimg2.ibsrv.net/gimg/pprune....6fcae6eee3.jpg |
But how do you push a spark plug into its fitting in the cilinder head against the pressure of the cilinder coming up? That's a pressure in the order of 5 or 6 atmosphere, leading to force of around 40 to 70 kgf (500 N methink), depending on the diameter of the spark plug.
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Originally Posted by washoutt
(Post 10544566)
But how do you push a spark plug into its fitting in the cilinder head against the pressure of the cilinder coming up? That's a pressure in the order of 5 or 6 atmosphere, leading to force of around 40 to 70 kgf (500 N methink), depending on the diameter of the spark plug.
Joking aside, I was wondering how they would do that too, and also how they would reach all 9 cylinder heads. Not to mention how much/little clearance there was between the forward plugs and the prop ... |
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