Helicopter Altitude and Parachutes

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CharlieOneSix
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Helicopter Altitude and Parachutes

#1 Post by CharlieOneSix » Sun Sep 04, 2022 10:55 am

TheGreenAnger wrote:
Sun Sep 04, 2022 2:19 am
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Maybe the mandatory wearing of a parachute like you mention would be one way to avoid the 9000 feet operating limitation?
Rather than continue this in the Pointless thread......Fire risk was the main reason we wore parachutes above 3000ft in the Wessex. The transmission castings, forgings, stringers and sheet metal fuselage were all magnesium. Apart from a magnesium fire imitating Fireworks Night, if you ditched when not on fire and didn't recover the helicopter quickly the sea water would start to react with the magnesium, hence why a recovered ditched Wessex was liberally hosed with fresh water in a faint attempt to minimise corrosion.
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Re: Helicopter Altitude and Parachutes

#2 Post by TheGreenAnger » Sun Sep 04, 2022 2:21 pm

Thanks for setting up an appropriate thread C16.

Magnesium burns like crazy so I can see why the need to expedite a departure from the aircraft at altitude might have been appropriate.

The R44 had a bad reputation with 🔥 particularly post crash due to the lack of bladders in the fuel tanks. This deficiency has been rectified in newer models.
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Re: Helicopter Altitude and Parachutes

#3 Post by TheGreenAnger » Wed Sep 07, 2022 12:42 pm

Pilot Delsalle makes this very difficult and dangerous high altitude flight, look easy.


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Re: Helicopter Altitude and Parachutes

#4 Post by CharlieOneSix » Wed Sep 07, 2022 4:05 pm

During basic flying training one exercise with an instructor was for a looong climb to 10,000ft in a piston engined Whirlwind (packed lunch and refreshments provided! :D ) for a demonstration of retreating blade stall at altitude. Once complete a Cornish field was chosen to autorotate into....and with about 6 or 7 minutes to get it sorted I managed to miss the field! :ymblushing:
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Re: Helicopter Altitude and Parachutes

#5 Post by TheGreenAnger » Wed Sep 07, 2022 5:08 pm

CharlieOneSix wrote:
Wed Sep 07, 2022 4:05 pm
During basic flying training one exercise with an instructor was for a looong climb to 10,000ft in a piston engined Whirlwind (packed lunch and refreshments provided! :D ) for a demonstration of retreating blade stall at altitude. Once complete a Cornish field was chosen to autorotate into....and with about 6 or 7 minutes to get it sorted I managed to miss the field! :ymblushing:

More altitude, more possible embarrassment! ;)))

I imagine that a retreating blade stall is not benign at all, even in a 3 bladed Whirlwind with a fully articulated rotorhead. A retreating blade stall in the teetering rotor Robinson R44 would most likely be disastrous probably resulting in mast bumping or blade slapping/boom chopping, with an expedited return from altitude to a smoking hole back on terra firma! The added altitude would give one enough time to consider one's misbegotten life even as one headed for the target field with the unerring accuracy of a lawn dart! ;)))
I can calculate the motions of the heavenly bodies, but not the madness of people - Newton

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Re: Helicopter Altitude and Parachutes

#6 Post by FD2 » Wed Sep 07, 2022 11:55 pm

Get it down as fast as possible. This HMCG wasn't very high when it had an engine fire. http://news.bbc.co.uk/2/hi/uk_news/england/2131775.stm

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Re: Helicopter Altitude and Parachutes

#7 Post by CharlieOneSix » Thu Sep 08, 2022 11:56 am

FD2 wrote:
Wed Sep 07, 2022 11:55 pm
Get it down as fast as possible. This HMCG wasn't very high when it had an engine fire. http://news.bbc.co.uk/2/hi/uk_news/england/2131775.stm
20 years ago - surely not! Tempus fugit and all that.
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Re: Helicopter Altitude and Parachutes

#8 Post by FD2 » Thu Sep 08, 2022 7:41 pm

That Whirlwind height climb was one of the most uncomfortable ones - it felt like we we sitting on the top of a pin, wobbling around. My Aussie instructor wasn't impressed by my efforts to get to the threshold of the duty runway but we made the other end, just.

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