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Forum: Rotorheads
16th Jul 2019, 19:10
Replies: 47
Views: 6,822
Posted By SansAnhedral

The FAA data is from the General Aviation Survey...

The FAA data is from the General Aviation Survey and was only obtained via a FOIA request by the LA Times.

https://github.com/datadesk/helicopter-accident-analysis/blob/master/notebook.ipynb
Forum: Rotorheads
11th Jul 2019, 14:19
Replies: 348
Views: 231,993
Posted By SansAnhedral

If that were the case, then why did AW redesign...

If that were the case, then why did AW redesign the booms after that exact incident? :suspect:
...
Forum: Rotorheads
26th Jun 2019, 15:01
Replies: 416
Views: 134,142
Posted By SansAnhedral

Wait, 55 flight hours in 4 years of flight...

Wait, 55 flight hours in 4 years of flight testing? :sad:
Forum: Rotorheads
12th Jun 2019, 19:21
Replies: 67
Views: 24,183
Posted By SansAnhedral

I would imagine a much more vocal propaganda push...

I would imagine a much more vocal propaganda push about how ITEP will make UH-60 and AH-64 perfectly suitable moving forward, and that FVL is an expensive wholly unnecessary endeavour.
Forum: Rotorheads
12th Jun 2019, 14:34
Replies: 67
Views: 24,183
Posted By SansAnhedral

As with Raider, flight test is progressing...

As with Raider, flight test is progressing glacially. As of a couple weeks ago, supposedly SB-1 had completed its 3rd flight , hovering to 150 ft and 10 kts air taxi.

Raider has actually been...
Forum: Rotorheads
10th Jun 2019, 19:21
Replies: 144
Views: 82,762
Posted By SansAnhedral

CBS reporting A109E

CBS reporting A109E
Forum: Rotorheads
2nd May 2019, 14:54
Replies: 416
Views: 134,142
Posted By SansAnhedral

Ah I see. Thanks for the correction John, I got...

Ah I see. Thanks for the correction John, I got the "low gain" quote from the Sikorsky Archives article.
Forum: Rotorheads
1st May 2019, 19:54
Replies: 416
Views: 134,142
Posted By SansAnhedral

True, they were somewhat opposite in respect (too...

True, they were somewhat opposite in respect (too low gains (https://www.sikorskyarchives.com/S-69%20(XH-59A).php) in XH-59 vs 2.5x cyclic oversensitivity in S-97 in transition), but still overall...
Forum: Rotorheads
1st May 2019, 14:31
Replies: 416
Views: 134,142
Posted By SansAnhedral

Looks like the full factual NTSB report was...

Looks like the full factual NTSB report was released on the S97 "hard landing" back in 2017.

5 seconds of roll oscillations up to 60 degrees (!) followed by rotor intermeshing and destruction....
Forum: Rotorheads
2nd Apr 2019, 17:47
Replies: 39
Views: 10,968
Posted By SansAnhedral

130kt straight and level @ 89% torque ...

130kt straight and level @ 89% torque

https://twitter.com/helicompany/status/1100855049629171713
Forum: Rotorheads
30th Jan 2019, 14:43
Replies: 19
Views: 2,327
Posted By SansAnhedral

I do realize the US Army already made this...

I do realize the US Army already made this mind-boggling decision....but why in the world would you field a twin as a primary rotary initial training platform?
Forum: Rotorheads
24th Jan 2019, 13:08
Replies: 31
Views: 23,955
Posted By SansAnhedral

Looks to be a Z-9, so who knows what sort of...

Looks to be a Z-9, so who knows what sort of quality issues there are with those vs a "real" Dauphin
Forum: Rotorheads
12th Jan 2019, 17:22
Replies: 57
Views: 13,277
Posted By SansAnhedral

It lives! We now have a pretty exact milestone to...

It lives! We now have a pretty exact milestone to compare between the programs. V280 first turned rotors in mid September 2017.

https://vimeo.com/310359926/d67d8efe44

Anyone else think the prop...
Forum: Rotorheads
10th Jan 2019, 18:30
Replies: 24
Views: 2,901
Posted By SansAnhedral

The real operating rotors don't appear to be...

The real operating rotors don't appear to be fixed pitch

https://assets.bellflight.com/web/5b764c73356b8e75/ces-2019/?mediaId=5298B462-EFAC-4B31-A80CF454E1F843CC

With a disc loading of about 19...
Forum: Rotorheads
10th Jan 2019, 15:14
Replies: 57
Views: 13,277
Posted By SansAnhedral

It does look a little different than what you can...

It does look a little different than what you can see on the renderings from the promo videos (note reflective ground lets you see more detail)
...
Forum: Rotorheads
2nd Jan 2019, 19:09
Replies: 57
Views: 13,277
Posted By SansAnhedral

They even got the paint scheme down pat

They even got the paint scheme down pat
Forum: Rotorheads
2nd Jan 2019, 15:42
Replies: 57
Views: 13,277
Posted By SansAnhedral

Yes this seems to be the case. We discussed here...

Yes this seems to be the case. We discussed here it a few years ago https://www.pprune.org/rotorheads/524130-s97-raider-4.html#post8992794
Forum: Rotorheads
19th Dec 2018, 17:34
Replies: 1,998
Views: 536,569
Posted By SansAnhedral

Sikorsky had been working conceptual design...

Sikorsky had been working conceptual design layouts for a 5 bladed S92 hub going back at least 10 years ago. With the original VXX, CSAR-X, and MHP kerfuffle, I think a lot of these upgrades...
Forum: Rotorheads
12th Dec 2018, 19:08
Replies: 57
Views: 13,277
Posted By SansAnhedral

How is that crow tasting, Van Buiten?

How is that crow tasting, Van Buiten?
Forum: Rotorheads
7th Dec 2018, 15:16
Replies: 22
Views: 8,941
Posted By SansAnhedral

Romania issued a letter of request for 21 Venom...

Romania issued a letter of request for 21 Venom and 24 Vipers over the summer
Forum: Rotorheads
20th Nov 2018, 15:53
Replies: 14
Views: 5,211
Posted By SansAnhedral

Does the VH-92 get a new gearbox that can survive...

Does the VH-92 get a new gearbox that can survive > 8 mins oil out of the main case vs the S-92A? I remember hearing about a very in-depth MGB re-design program called ID-MGB III (improved durability...
Forum: Rotorheads
8th Nov 2018, 21:14
Replies: 89
Views: 7,798
Posted By SansAnhedral

The Bin Laden raid VRS theory holds some water...

The Bin Laden raid VRS theory holds some water since the downwash circulation was likely exacerbated by the tall courtyard walls (I believe I read that the teams trained on exact replicas of the...
Forum: Rotorheads
5th Nov 2018, 18:23
Replies: 78
Views: 10,789
Posted By SansAnhedral

What kind night vision recovery time would be...

What kind night vision recovery time would be required after sitting in that high-intensity spotlighting so they could film the departure? Seems awfully intense for a pilot to then make an immediate...
Forum: Rotorheads
29th Oct 2018, 15:54
Replies: 8
Views: 6,650
Posted By SansAnhedral

Certainly looks like convertible engines ...

Certainly looks like convertible engines

https://defence-blog.com/wp-content/uploads/2018/10/44859968_2462767997083053_2017476143296282624_n.jpg
...
Forum: Rotorheads
26th Oct 2018, 15:23
Replies: 105
Views: 55,254
Posted By SansAnhedral

Good video of V280 demonstration flight in...

Good video of V280 demonstration flight in Arlington

https://www.star-telegram.com/news/local/community/arlington/article220650710.html
Showing results 1 to 25 of 600
 


 
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