The Osprey After Five Years

[ORAC]

AoI Defense: The Osprey After Five Years: Leading A 'Tsunami Of Change' (http://defense.aol.com/2012/08/23/the-osprey-after-five-years-leading-a-tsunami-of-change/)

[Finnpog]

An interesting overview article. It is almost a PR advert. I wold like to see something with some evidence of any areas of weakness - otherwise it seems that it is still doomed to succeed.

But, if it is that good - then well played to the team that had the imagination! Determination and funding to pull it off. Particularly the field testing part of the programme.

It seems funny to think that it is five years already.

[Grenville Fortescue]

In my view the increase in speed (still gained over relatively short distances) does not warrant the increase in acquisition and operating costs against a comparable size conventional helicopter.

Better cruising speeds are needed for sure - but not at any price.

[911slf]

What could this have achieved with 50 years of development?

Fairey Rotodyne - Wikipedia, the free encyclopedia (http://en.wikipedia.org/wiki/Fairey_Rotodyne)

[SASless]

There is a very long standing thread on the Osprey at Rotorheads Forum. Save some time and take a read of the posts there.

[Jumping_Jack]

Looking forward to seeing a few more in the UK next year....a squadron's worth being based in East Anglia! :ok:

[Mr_B]

SASless

There is a very long standing thread on the Osprey at Rotorheads Forum. Save some time and take a read of the posts there.

Quick summary? Chinook cheaper and just about does the job.

[Lonewolf_50]

Chinook not an option, if you bother to go back twenty years to the great thrash over how to replace the Sea Knight, which some call the "baby Chinook."

Shipboard deployable and deck spotting multiple a factor.

Thanks for playing.

[dead_pan]

Looking forward to seeing a few more in the UK next year....a squadron's worth being based in East Anglia!

Saw one at low-ish level enroute from Farnborough to Fairford which was very impressive, although my immediate thought was what would happen in the event of an engine failure. Presumably no prospect of unpowered flight/autorotation?

[mike-wsm]

911slf - Rotodyne

Fairey Rotodyne - YouTube

Nice video but I understand that transition was difficult and that noise was a major problem.

[BossEyed]

...although my immediate thought was what would happen in the event of an engine failure. Presumably no prospect of unpowered flight/autorotation?

Why not?

In any case, a single engine failure - like e.g. the CH-47 - is catered for by cross shafts, meaning that each nacelle powers both rotors via the transmission system.

[BEagle]

The Rotodyne's noise issues were almost cured by the time the plug was pulled on the programme. Another promising British 'Project Cancelled'....

In any case, a single engine failure - like e.g. the CH-47 - is catered for by cross shafts, meaning that each nacelle powers both rotors via the transmission system.

A similar concept was featured in the Breguet 941 STOL aeroplane:

http://i14.photobucket.com/albums/a341/nw969/Breguet941.jpg

Each of the 4 free turbine engines drove an independent shaft which was connected to a master shaft which was connected to all 4 propellers.
With this concept, the power of the engines was distributed uniformly to all the propellers. Thus if an engine failed, its turbine was isolated but the corresponding propeller kept on rotating at the same speed as the other 3.

[mike-wsm]

XV-3, XV-15, V-22 Osprey

Bell Helicopter XV-3 Tilt Rotor.mpg - YouTube

Bell XV-15 - YouTube

V-22 Osprey Farnborough 2012 (Monday) - YouTube

Five years? Actually more than fifty-five years! The XV-3 first flew in August 1955, XV-15 in May 1977, and V-22 in March1989.

[mike-wsm]

BEagle

http://i1165.photobucket.com/albums/q594/mike-wsm/pprune/0c71c6a1.jpg


This pic shows the interconnecting shafts and speeds of rotation. Interesting to note that inboard props rotate toward fuselage and outboard ones away from fuselage.

[Willard Whyte]

It never flew, but it's an 'interesting' design nonetheless...

http://upload.wikimedia.org/wikipedia/commons/4/43/Fa269u_rv.JPG

[mike-wsm]

Willard Whyte - That's a model of the Fa269 from Alliance Models...

...and here's a similar plane that did fly:


http://i1165.photobucket.com/albums/q594/mike-wsm/pprune/f47ec317.jpg

Do29


The Do29 first flew during December 1958. Two Lycoming GO-480, cross-linked. Take off in 80 feet, landing in 50 feet.

[mike-wsm]

Try these, folks - Curtis-Wright X-100 and X-19, Doak 16, Bell X-22A, Nord 500, Vertol 76 or VZ-2, Hiller X-18, LTV-Hiller-Ryan XC-142, Canadair CL-84 Dynavert (that should wake up Slasher), Ryan VZ-3 Vertiplane, Fairchild VZ-5 Fledgling, and the already cited Breguet 940 Integral, 941, and 941S or McDonnel 188.

[JT Eagle]

Bell-Boeing showed this slide at Farnborough, giving their lineage for the V-22. There are more of these things than you can shake a cyclic at - but what on Earth was the Baynes Heliplane?

JT

Tiltrotor history | Flickr - Photo Sharing! (http://www.flickr.com/photos/38857033@N08/7886362528/)

[Willard Whyte]

I rather prefer this conceptual art of the Heliplane.

http://ww2drawings.jexiste.fr/Images/2-Airplanes/Allies/3-UK/08-Others/Baynes-Heliplane/p2.jpg

Hope it's not of wood and fabric construction...

Anyhoo, good of Bell-Boeing to acknowledge Baynes' contribution, although it was patented, allegedly, so they probably had to.

[mike-wsm]

Interesting!

Additional comment and pics of model here:
Westland Weka ASR (http://www.whatifmodelers.com/index.php/topic,33367.0.html)
First three paragraphs plus pics.

Patent October 1938:
GB Patent 493439 - Improvements in or relating to aircraft (http://www.wikipatents.com/GB-Patent-493439/improvements-in-or-relating-to-aircraft)
.

[Willard Whyte]

using the sealed fusalage as a float,

Phew! No soggy feet.

[At ease]

Thanks for prompting me to do a little homework(only a little because there does not seem to be much web based material available).

Groen Brothers Aviation, Inc. - The leader in Gyrodyne technology. - Fairey Rotodyne (http://www.groenbros.com/FaireyRotodyne.php)