Boeing-Vertol Model 179 YUH-61A UTTAS / Model 237 LAMPS contender

Abraham Gubler · 22 February 2009

Some information on the Boeing Vertol Model 237 (YUH-61A) offer for the Utility Tactical Transport Aircraft System (UTTAS) project (lost to the Sikorsky Black hawk). A few of their period adverts.

flateric · 22 February 2009

I have an old promotional brochure that damn don't fit the scaner...

AeroFranz · 23 February 2009

FYI there is an article complete with cutaways (both Army and Navy versions IIRC) on the Flight Archives.

alanqua · 1 March 2009

Can you provide a link please?

flateric · 1 March 2009

http://www.flightglobal.com/pdfarchive/view/1976/1976%20-%201601.html and following pages

alanqua · 1 March 2009

Thank you!
Pardon me, but it does not talk about the Navy version of the YUH-61 (LAMPS). I've been searchin for this one in Flight Archives but never found something.

Regards
Alain

AeroFranz · 1 March 2009

That's my bad. :-[
I did not read the article but just saved it for future reading because I found it while looking for something else, and I thought i saw two cutaways differing only in landing gear arrangement (hence army/navy version). i see now the second cutaway is the S-60.

overscan (PaulMM) · 17 July 2009

Some Boeing YUH-61 pics via sobchak.wordpress.com (note: site is a blog, you may find off-topic or objectionable material...)

Skybolt · 17 July 2009

There was a fine document on DTIC a couple of years ago on YUH-61. Disappeared, and who knows were it is on my disks...

Tailspin Turtle · 17 July 2009

alanqua said:
Thank you!
Pardon me, (deleted) but it does not talk about the Navy version of the YUH-61 (LAMPS). I've been searchin for this one in Flight Archives but never found something.

Regards
Alain

SteveO · 17 July 2009

Why is the main rotor shaft a lot longer in the naval variant ???

hesham · 17 July 2009

Hi,

the Boeing Vertol LAMPS version was called BV.237.

JohnR · 1 August 2009

From what I recall there wasn't much in terms of performance between the Boeing and Sikorsky UTTAS, I remember the story of the Boeing crashing into a stand of Oaks and being repaired. And personaly I consider that the Boeing design was better aesthetically.

Why was the Blackhawk eventually selected?

Tailspin Turtle · 1 August 2009

SteveO said:
Why is the main rotor shaft a lot longer in the naval variant ???

To make a long story short, both the Sikorsky and Boeing candidates had problems due to the very short rotor shaft dictated by the requirement for air transportability. Sikorsky solved the problem by using a readily removable section of rotor shaft to reduce the overall height of the helicopter. When Boeing engineers modified their design for the Navy program, they lengthened the main rotor shaft.

Abraham Gubler · 1 August 2009

Tailspin Turtle said:
To make a long story short, both the Sikorsky and Boeing candidates had problems due to the very short rotor shaft dictated by the requirement for air transportability. Sikorsky solved the problem by using a readily removable section of rotor shaft to reduce the overall height of the helicopter. When Boeing engineers modified their design for the Navy program, they lengthened the main rotor shaft.

That's an interesting design problem. Having seen a few helos loaded into An-124s, C-17s it is the rotor hub that is always the tight fit. I would have thought approaching the problem laterally would have been the way and using crouching undercarriage. Leave the rotor hub be and lower the height by lowering the ground clearance.

Tailspin Turtle · 1 August 2009

JohnR said:
From what I recall there wasn't much in terms of performance between the Boeing and Sikorsky UTTAS, I remember the story of the Boeing crashing into a stand of Oaks and being repaired. And personaly I consider that the Boeing design was better aesthetically.

Why was the Blackhawk eventually selected?

At the risk of oversimplifying, and based on correspondence with an Army official involved in the selection, the prototypes of both helicopters were found to have significant problems during the fly off for which both companies proposed credible solutions. However, the Boeing UTTAS design incorporated an advanced Bölkow-type hingeless rotor that was considered higher risk by the Army evaluators, particularly from a development schedule standpoint. The Sikorsky UTTAS proposal had a more conventional rotor of a larger diameter and was therefore considered to be more likely to meet the challenging hover requirement and also have better high-speed maneuverability. Boeing management disagreed with the risk assessment, of course, and believed that if they had just had a little more time to develop and demonstrate fixes to the excessive YUH-61 vibration problem, the decision would have gone the other way. That they ran out of time might have been due to the fact that they refused until the last minute to raise the rotor higher above the fuselage as shown in their Navy LAMPS proposal.

JohnR · 2 August 2009

Interesting and very concise, you've answered my question nicely.

Thanks.

alanqua · 2 August 2009

Hi,

To illustrate the debate, here are some drawings I made and publish in "Le Fana de l'Aviation" quite some time ago.
- General 3 view plan of the YUH-61
- One view of the LAMPS

Regards
Alain

Triton · 2 August 2009

Additional Boeing-Vertol YUH-61 UTTAS images.

alanqua · 2 August 2009

Nice!
I did not have the one with the air intake in the airflow test facility (first of your photo). Do you have other pictures like that?
Regards
ALain

hesham · 25 March 2010

Hi,

here is the Boeing-Vertol BV.237 LAMPS III mock-up.

Creative · 25 March 2010

Fascinating, thanks for sharing that. Did it compete with Kaman?

Howedar · 25 March 2010

It lost the competition to Sikorsky's S-70 (SH-60, in this particular case) for LAMPS-III (and, as I recall, the Army competition as well).

Pioneer · 12 June 2010

Hey Hesham
I found this on one of my discs. I am sorry but I have no source!

Regards
Pioneer

AeroFranz · 12 June 2010

I think there is already another thread on YUH-61...

Stargazer · 12 June 2010

LAMPS III was the Boeing Vertol BV-237, while UTTAS was the BV-179. Although they had much in common, they can be considered as two separate designs and I believe therefore that each deserves a thread of its own!

Triton · 25 August 2010

Model of Boeing YUH-61 UTTAS found on eBay. Manufacturer of model is unknown.

URL: http://cgi.ebay.com/TOPPING-LIKE-BOEING-YUH-61-ULTRA-RARE-MODEL-1970S-/170531827545?pt=LH_DefaultDomain_0

Description:

UP FOR BID WITH "NO RESERVE" IS A RARE DESK MODEL OF THE EXPERIMENTAL ARMY HELICOPTER KNOWN AS THE YUH-61( AKA MODEL 179) CONCEIVED BY BOEING IN THE MID 1970'S WHEN COMPETING FOR A "UTTAS" PROGRAM IN COMPETITION WITH SIKORSKY'S S-60 (WHO WON). THIS DESK MODEL WAS MADE FOR BOEING POSSIBLY BY TOPPING OR ROLEN AND DISTRIBUTED TO ARMY GENERALS AT THE PENTAGON.

THE MODEL IS IN PRISTINE CONDITION WITH NO MISSING PARTS THAT I CAN TELL NOR ANY CRACKS OR GLUED AREAS ANYWHERE. IT'S AN AWESOME MODEL TO LOOK AT, AND OWN IN ONE'S COLLECTION AS ONLY THREE EXPERIMENTAL ONES WERE EVER MADE AND NEVER WENT INTO PRODUCTION. THIS HELICOPTER HAD 4 BLADES NOT 2.

THE MODEL IS LIKE NEW AND IS IN EXCELLENT CONDITION AND COMES WITH 2(DOUBLE) ROTOR BLADES, A TAIL ROTOR AND A BLACK PLASTIC STAND. THE STAND HAS NO MARKINGS WHATSOEVER. NOT SURE IF THE MODEL IS MADE OF PLASTIC OR FIBERGLASS, EITHER WAY IT'S AN OUTSTANDING MODEL TO OWN AND ADD TO ANY HELICOPTER COLLECTION. THIS ONE WAS PURCHASED ALMOST 20 YEARS AGO FROM A GOOD FRIEND PILOT (DECEASED)WHO CAPTAINED A GOLDEN DC9 OWNED BY THE LATE MALCOLM FORBES.

THE MODEL IS APPROXIMATELY 13 INCHES LONG. I BELIEVE THE SCALE MAY BE 1:48. I HAVE NOT SEEN ANOTHER ONE LIKE IT IN MY 35 YEARS OF COLLECTING HELIS EXCEPTING ONE (1) EXAMPLE AT THE HELICOPTER MUSEUM IN VIRGINIA.

Triton · 25 August 2010

Model of Boeing YUH-61 UTTAS found on eBay. Manufacturer of model is unknown.

flateric · 9 May 2011

11/18/75 YUH-61A UTTAS 01 mishap report and photos
http://ww.chinook-helicopter.com/news/Boeing/CH-47C_Slings_UTTAS_001_November_1975.pdf

flateric · 9 May 2011

some graphics from http://www.dtic.mil/srch/doc?collection=t3&id=ADA063712
all other YUH-61A related docs at DTIC are unaccessible

Triton · 7 June 2011

Boeing Vertol YUH-61A UTTAS model found on eBay.

URL:
http://cgi.ebay.co.uk/BOEING-VERTOL-YUH-61A-/200615926241?pt=UK_ToysGames_ModelKits_ModelKits_JN&hash=item2eb5a419e1

Stingray · 17 February 2012

Some great pictures regarding the YUH-61 via Ray and the USAAM archives:

http://stingraysrotorforum.activeboard.com/t26318430/boeing/?page=4

Stingray · 17 February 2012

More:

Triton · 7 September 2012

Boeing Vertol YUH-61A press photo circa 1973.

Source:
http://www.ebay.com/itm/1973-Boeing-Vertol-Division-Press-Photo-/200794612810?pt=Art_Photo_Images&hash=item2ec04aa44a

Triton · 7 September 2012

Boeing Vertol Model 179 commercial variant.

Source:
http://www.ebay.com/itm/1973-Boeing-Vertol-Division-Model-179-helicopter-Press-Photo-/190704754255?pt=Art_Photo_Images&hash=item2c66e39e4f

Stargazer · 13 September 2012

A general arrangement of the 19-passenger, twin-turbine Boeing Vertol Model 179 helicopter, originating from the company:

Stargazer · 13 September 2012

Configuration changes were considered circa 1980 (from the same document as above):

Triton · 13 September 2012

Full-scale mock-up of the Boeing Vertol 237 which is being developed to meet the U.S. Navy's requirement for a Light Airborne Multi-Purpose System (LAMPS) - shipborne anti-submarine helicopter.

Source:
http://crimso.msk.ru/Site/Crafts/Craft21783.htm

Triton · 13 September 2012

Source:
http://www.ebay.com/itm/Boeing-Vertol-YUH-61-A-UTTAS-Helicopter-1975-print-Ad-advertisement-/360473086955?pt=LH_DefaultDomain_0&hash=item53eddecbeb
http://www.ebay.com/itm/Boeing-Vertol-YUH-61-A-UTTAS-Helicopter-Spill-Proof-Seat-1975-Ad-advertisement-/140797924039?pt=LH_DefaultDomain_0&hash=item20c835d2c7

Stargazer · 6 October 2012

Promotional photo of the Model 237:

Boeing-Vertol Model 179 YUH-61A UTTAS / Model 237 LAMPS contender

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