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Search: Posts Made By: SplineDrive
Showing results 1 to 20 of 20
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Forum: Rotorheads
25th Apr 2024, 09:40
Replies: 23
Views: 12,255
Posted By chopper2004

first flight

Congratulations to Airbus Helicopters

https://www.airbus.com/en/newsroom/press-releases/2024-04-airbus-helicopters-racer-is-off-to-a-flying-start
...
Forum: Rotorheads
30th Mar 2024, 21:20
Replies: 186
Views: 38,966
Posted By Commando Cody

If this was in response to my comment, FWIW I...

If this was in response to my comment, FWIW I must say that I believe the Ukraine War was an excuse, not a reason. The use of drones was new, but they actually weren't that capable in the aggregate....
Forum: Rotorheads
28th Mar 2024, 19:47
Replies: 100
Views: 7,237
Posted By RVDT

Maybe -

Maybe -
Forum: Rotorheads
26th Mar 2024, 19:29
Replies: 100
Views: 7,237
Posted By RVDT

Is The Rotor A Gyro? - Ray W. Prouty 1926 - 2014

Is The Rotor A Gyro? - Ray W. Prouty 1926 - 2014
Forum: Rotorheads
21st Mar 2024, 15:46
Replies: 100
Views: 7,237
Posted By 212man

When you have been here (on Pprune) long enough,...

When you have been here (on Pprune) long enough, it seems like 'groundhog day'! Waiting in the queue, we have HV curves, PC1/PC2/Cat A, and many more topics to bring up
Forum: Rotorheads
18th Feb 2024, 01:04
Replies: 186
Views: 38,966
Posted By noneofyourbusiness

There is no valid financial or technical reason...

There is no valid financial or technical reason for the Army to buy more Black Hawks, other than to maintain Sikorsky as a supplier. Stop wasting taxpayer money, let it go. Sikorsky was given the...
Forum: Rotorheads
17th Feb 2024, 19:26
Replies: 186
Views: 38,966
Posted By CTR

Thanks for saving me the time and responding

Splinedrive,

Thank you for saving me the time, and responding with most of the points I would’ve been making. Building on one point that really concerns me, is training the next generation of...
Forum: Rotorheads
28th Oct 2023, 13:12
Replies: 186
Views: 38,966
Posted By CTR

More Irony

One additional bit of historical irony in the FARA competition.

Sikorsky fully funded the Raider X prototype (not the FARA) on their own and teammate funding, absent any government request.
...
Forum: Rotorheads
15th Oct 2023, 03:49
Replies: 186
Views: 38,966
Posted By Commando Cody

The reasons Army went with Valor are fairly...

The reasons Army went with Valor are fairly straightforward. One of the biggest was Sikorsky's proposal was, in the words of the GAO denying the protest, "...technically unacceptable because...
Forum: Rotorheads
10th Aug 2023, 23:00
Replies: 39
Views: 12,572
Posted By FH1100 Pilot

In 1982 or so, when I was a mere lineboy, I...

In 1982 or so, when I was a mere lineboy, I witnessed a man walk into the tail rotor of a Bell 222 at the E60th Street Heliport in NYC. This, despite the fact that there were *two* customer service...
Forum: Rotorheads
6th Aug 2023, 02:48
Replies: 186
Views: 38,966
Posted By SASless

Spline....there are several "Over 50 Years Old"...

Spline....there are several "Over 50 Years Old" designs still flying in front lines operational units....OH-6 Little Birds, CH-47's, CH-53's, UH-1's, Cobra's, C-130's, C-5's, C-135's, U-2's.....it...
Forum: Rotorheads
29th Jul 2023, 21:37
Replies: 43
Views: 8,463
Posted By SASless

https://cimg5.ibsrv.net/gimg/pprune.org-vbulletin/...

https://cimg5.ibsrv.net/gimg/pprune.org-vbulletin/320x218/chinook_footwell_view_outside__0f7517540b6e60031d42d8a68cbb66af7c62c1ff.jpeg


During the Cambodia Incursion late one afternoon having...
Forum: Rotorheads
27th Jul 2023, 22:05
Replies: 43
Views: 8,463
Posted By Ascend Charlie

The hottest would be the EC-120. All that...

The hottest would be the EC-120.

All that glass and no ventilation, apart from a piddly fan that just blows in your eyes. No good in an Oz summer. My feet, in black shoes, were in direct sunlight...
Forum: Rotorheads
19th May 2023, 10:17
Replies: 271
Views: 54,510
Posted By CTR

Wet versus Dry

Another large benefit of a wet clutch over a dry clutch is more predictable coefficient of friction. The highest risk of damage in this clutch application is during engagement with the main rotors...
Forum: Rotorheads
18th May 2023, 16:55
Replies: 271
Views: 54,510
Posted By noneofyourbusiness

At a gas turbine company, I sometimes worked on...

At a gas turbine company, I sometimes worked on design of high power aerospace clutches. The wet clutch is always superior to a dry clutch. It is possible to design the Raider wet clutch to be...
Forum: Rotorheads
18th May 2023, 14:57
Replies: 271
Views: 54,510
Posted By SansAnhedral

Hold onto your butt. Remember that the...

Hold onto your butt.



Remember that the S-97 pusher is wet clutched so it does not stop rotating. Defiant used a dry clutch to attempt to demonstrate the safety aspect of stopping it during...
Forum: Rotorheads
29th Apr 2023, 22:24
Replies: 271
Views: 54,510
Posted By Commando Cody

From what I've been able to determine, when Bell...

From what I've been able to determine, when Bell and Boeing talked, the latter wanted too much control, espeecially in the Fkight Control System, and Bell wouldn't agree so Boeing walked (much to...
Forum: Rotorheads
25th Apr 2023, 20:44
Replies: 271
Views: 54,510
Posted By CTR

Configurations

To paraphrase a famous UK Prime Minister:

“The Tiltrotor is a horrible aircraft configuration, except when compared against all other alternatives”
Forum: Rotorheads
23rd Apr 2023, 18:40
Replies: 271
Views: 54,510
Posted By CTR

I heard a different background story. In early...

I heard a different background story. In early 2012, when Boeing and Bell were still teamed on the proposal for what was to evolve into FLRAA, Bell got uneasy, sensing that Boeing was up to...
Forum: Rotorheads
21st Apr 2023, 05:10
Replies: 271
Views: 54,510
Posted By Commando Cody

It's arguable that Boeing never had engineering...

It's arguable that Boeing never had engineering capability to develop new modern platforms. No helicopter of their own original design has eve rentered production. All their craft that entered...
Showing results 1 to 20 of 20


 
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