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S76 OGE OEI perf

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Old 5th Nov 2019, 16:00
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cpt
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S76 OGE OEI perf

Hi all,

Does someone know where to find or else, compute the S76 C++ OGE OEI performances?

Thanks!
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Old 5th Nov 2019, 19:42
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Zero answers; probably Zero performance.
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Old 5th Nov 2019, 19:47
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Curious to know why one would want to operate in such a scenario?
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Old 5th Nov 2019, 19:55
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Yeah, me too.
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Old 5th Nov 2019, 19:57
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Looking at the lists of perfomance charts on the RFM (Section IV on both Part 1 and Part 2), there is no such data. You only will find charts for Hover Out of Ground Effect at Take Off Power AEO and Forward Climb Performance OEI (Sec IV, Part 1) and Hover Out of Ground Effect Endurance AEO (Sec IV, Part 2).

Sometimes military manuals have more specific performance data, but I have never heard about a military S-76. Glad to be corrected (and informed about engines and specs) if wrong.
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Old 5th Nov 2019, 19:59
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Originally Posted by krypton_john
Curious to know why one would want to operate in such a scenario?
Some S-76 operate on a SAR role, so know the capabilities (or the lack of) on an engine failure during a hoist operation may be useful.
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Old 5th Nov 2019, 20:22
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Yes, I know the type well enough to expect a zero performance or almost, but I'm still curious to know whether something has been worked out.
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Old 6th Nov 2019, 09:10
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They operated the S76 in the SAR role in Hong Kong years ago. They then moved on to the AS 332L which gave you a chance at +30C over the water.

I operated the S76+ there for a time and it was enough trouble hovering with both going let alone one.
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Old 6th Nov 2019, 20:38
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If you ask the right people at Sikorsky they have OEI HOGE charts for C+ and C++. Not impressive, but still, and at SL and ISA it is something that could be used.

CB
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Old 6th Nov 2019, 20:49
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Originally Posted by Fareastdriver
They operated the S76 in the SAR role in Hong Kong years ago. They then moved on to the AS 332L which gave you a chance at +30C over the water.

I operated the S76+ there for a time and it was enough trouble hovering with both going let alone one.
I concur! It's the only twin engined helicopter I've flown where a running takeoff was sometimes needed for a SAR mission because we needed something near full fuel.

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Old 7th Nov 2019, 00:16
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Originally Posted by ShyTorque
I concur! It's the only twin engined helicopter I've flown where a running takeoff was sometimes needed for a SAR mission because we needed something near full fuel.
Wich version?
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Old 7th Nov 2019, 10:23
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Originally Posted by Jimmy.
Wich version?
Assuming Hong Kong, would have been A+ and C.
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Old 8th Nov 2019, 02:16
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Originally Posted by 212man
Assuming Hong Kong, would have been A+ and C.
Both dogs, and as SAR machines heavy dogs. We got a “good deal” on an ex-HK C+, then hopelessly tried to get it light enough to give customers some payload. Was always the first machine released. OEI HOGE was a new performance requirement for commercial SAR that had to comply with rules meant for passenger transport. Even with the (relatively) mighty AW139 we couldn’t train SAR in peak heat summer months (over 35C) because we’d be over the OEI HOGE weight of 5200 kg.
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Old 9th Nov 2019, 13:29
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Originally Posted by Collective Bias
If you ask the right people at Sikorsky they have OEI HOGE charts for C+ and C++. Not impressive, but still, and at SL and ISA it is something that could be used.

CB
Thank you Collective Bias.

It is also what I'm thinking, so I'll try to find "the right people" at Sikorsky and ask about.
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Old 9th Nov 2019, 14:41
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Originally Posted by malabo

Both dogs, and as SAR machines heavy dogs. We got a “good deal” on an ex-HK C+, then hopelessly tried to get it light enough to give customers some payload. Was always the first machine released. OEI HOGE was a new performance requirement for commercial SAR that had to comply with rules meant for passenger transport. Even with the (relatively) mighty AW139 we couldn’t train SAR in peak heat summer months (over 35C) because we’d be over the OEI HOGE weight of 5200 kg.
That wouldn't have been an SAR version, though. It was presumably an ex "Sky Shuttle" machine.
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Old 9th Nov 2019, 17:16
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Originally Posted by ShyTorque
That wouldn't have been an SAR version, though. It was presumably an ex "Sky Shuttle" machine.
that’s what I was thinking - the SAR machines were Cs not C+s I thought
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Old 9th Nov 2019, 20:21
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No, they were actually "A++" versions. The C's (or "B-" as they were sometimes scathingly called) were not SAR equipped.
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Old 9th Nov 2019, 20:33
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Originally Posted by ShyTorque
No, they were actually "A++" versions. The C's (or "B-" as they were sometimes scathingly called) were not SAR equipped.
ah, thanks. So same engines but lighter airframes
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Old 9th Nov 2019, 21:30
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The old SkyShuttle C+'s didn't go to GFS....GFS had converted A-models with Arriel engines (the tail is a give-away it was once an A, the engine cowl is a give-away it has an Arriel). They also might have had a C for a while, but I'm reasonably sure they never operated a C+.


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Old 10th Nov 2019, 01:03
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Originally Posted by gulliBell
The old SkyShuttle C+'s didn't go to GFS....GFS had converted A-models with Arriel engines (the tail is a give-away it was once an A, the engine cowl is a give-away it has an Arriel). They also might have had a C for a while, but I'm reasonably sure they never operated a C+.
No, GFS never operated the C+. They had three C airframes but changed to Eurocopter and all the Sikorsky aircraft were sold, including the three S-70s.
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