NASA Airbus Helicopters H135
Announced here today in Anaheim and a historical first: NASA orders 3 x Airbus Helicopters H135 to replace the legacy Bell UH-1H at Kennedy Space Center supporting space ops.
https://www.airbus.com/newsroom/pres...licopters.html https://cimg8.ibsrv.net/gimg/pprune....a659d89f6.jpeg |
Looks nice in the NASA livery!
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Surprised they didn't go with an EC145/UH-72 and leverage the Army contract for something with a bit bigger cabin.
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Originally Posted by Tango and Cash
(Post 10674592)
Surprised they didn't go with an EC145/UH-72 and leverage the Army contract for something with a bit bigger cabin.
cheers |
First two delivered
First pair delivered (photos courtesy of Airbus )
https://www.airbus.com/newsroom/pres...ce-center.html https://cimg2.ibsrv.net/gimg/pprune....79496d3d8.jpeg https://cimg3.ibsrv.net/gimg/pprune....8a46ab123.jpeg https://cimg5.ibsrv.net/gimg/pprune....840582825.jpeg https://cimg7.ibsrv.net/gimg/pprune....c8ef83472.jpeg https://cimg9.ibsrv.net/gimg/pprune....64ab2fd0c.jpeg |
VERY NICE !!! I've worked on both the old & new 135's - they are a brilliant workhorse.
But why do they have the taller vertical fin fairing? No floats either, which I thought would've been a requirement over water rescuing & transferring astronauts? |
Originally Posted by Kulwin Park
(Post 10896749)
VERY NICE !!! I've worked on both the old & new 135's - they are a brilliant workhorse.
But why do they have the taller vertical fin fairing? No floats either, which I thought would've been a requirement over water rescuing & transferring astronauts? |
Originally Posted by QTG
(Post 10896788)
The extended vertical fin fairing is Airbus’s response to the design department’s decision to remove the vertical stabilisers on the T3 variant. The first T3s, without the fin extension, had (still have) an uncomfortable tendency to fishtail at high speed, especially in turbulent conditions. The fin extension is now offered as an optional refit for those early airframes. Makes you wonder how come the test pilots signed it off in the first place.
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Earlier 135's with sideslip angles around 30-45 degrees suffer from instability from the wake from the endplates entering the fenestron. Not ideal.
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Originally Posted by RVDT
(Post 10897100)
Earlier 135's with sideslip angles around 30-45 degrees suffer from instability from the wake from the endplates entering the fenestron. Not ideal.
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Flying at sideslip angles around 30-45 degrees is Not ideal. 20-40 knots with an angle of 30-45 is the worst for endplate wake. |
Thanks QTG. Explains it all now. I hadn't touched the Helionix types, so hadn't see that fin.
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Originally Posted by FloaterNorthWest
(Post 10896982)
This tendency only became apparent when the Helionix model (P3H and T3H) was released which has a completely different AFCS system to the early T3 and P3.
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Originally Posted by Kulwin Park
(Post 10896749)
No floats either, which I thought would've been a requirement over water rescuing & transferring astronauts?
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Originally Posted by MikeNYC
(Post 10897605)
I don't believe water rescue is part of their mission...you may notice the H135's are not hoist equipped. USAF HH-60's served that role for awhile, but not sure if that remains accurate.
https://www.920rqw.afrc.af.mil cheers |
Originally Posted by MikeNYC
(Post 10897605)
I don't believe water rescue is part of their mission...you may notice the H135's are not hoist equipped. USAF HH-60's served that role for awhile, but not sure if that remains accurate.
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Originally Posted by FloaterNorthWest
(Post 10896982)
This tendency only became apparent when the Helionix model (P3H and T3H) was released which has a completely different AFCS system to the early T3 and P3.
All of nips and tucks on T3 are about making it better for high altitude out of wind hover. I prefer a P or T2+ For sea level to and fro work (although I do like Helionix a lot). |
Third and final
Third and final H135 delivered last week...
https://www.nasa.gov/image-feature/a...security-fleet https://cimg6.ibsrv.net/gimg/pprune....3fe3b65a3b.jpg cheers |
Originally Posted by QTG
(Post 10896788)
The extended vertical fin fairing is Airbus’s response to the design department’s decision to remove the vertical stabilisers on the T3 variant. The first T3s, without the fin extension, had (still have) an uncomfortable tendency to fishtail at high speed, especially in turbulent conditions. The fin extension is now offered as an optional refit for those early airframes. Makes you wonder how come the test pilots signed it off in the first place.
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Originally Posted by gipsymagpie
(Post 10898278)
The non-Helionix T3 are still stuck with a 90kt limit on the IAS UM mode IFR so I think the problem is on both variants. Limitation cannot be removed unless tall fin is fitted.
Can you give me the FLM reference for this limitation? Thanks FNW |
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