Advanced Medium STOL Transport (AMST) and its predecessors

[Cy-27]

The YC-15 used a new technique for bonding sections of the fuselage, without the use of rivets. This method was called Primary Adhesive Bonded Structure Technology (PABST). Started in 1975 and backed by the US Air Force it was used on the YC-15 fuselage build.

A McDonnell-Douglas leaflet (from January 1979) explaining the process is attached.

 

[Pioneer]

Hey very nice find Cy-27!!
The STOL Airborne Surgical Hospital drawing is a gem B)
I also found the proposed 'stretched' C-15 very interesting, in that McDD envisaged a growth potential for the design. This goes a long way in answering a question of mine, ever since I was a kid and the C-X / C-17 program was first started....."Would it be viable for the C-17A be stretched like the Lockheed C-141B Starlifter was?"
I guess the answer would be yes then :

Regards
Pioneer

 

[circle-5]

Alone in the desert...

 

[aim9xray]

Ah. Been out to the Century [half] Circle, have you? Nice image.

 

[quellish]

Ah. Been out to the Century [half] Circle, have you? Nice image.

I am out in that area regularly. If someone needs a photo of a specific detail, message me and I'll see what I can do.

 

[Triton]

Boeing YC-14 photos found on eBay.

Source:
http://www.ebay.com/itm/Boeing-YC-14-Transport-Cargo-Airplane-Aircraft-Photo-005-/331056531762?pt=LH_DefaultDomain_0&hash=item4d1481c932
http://www.ebay.com/itm/Boeing-YC-14-Transport-Cargo-Airplane-Aircraft-Photo-003-/331056531799?pt=LH_DefaultDomain_0&hash=item4d1481c957
http://www.ebay.com/itm/Boeing-YC-14-Transport-Cargo-Airplane-Aircraft-Photo-004-/231085330187?pt=LH_DefaultDomain_0&hash=item35cdc24f0b

 

[hesham]

Boeing 953-801 as base model and based on it Air Cushion Landing System aircraft


http://contrails.iit.edu/DigitalCollection/1973/AFFDLTR73-019volume06.pdf

Anther 3-view to Boeing Model 953-801.

 

[Stargazer]

Awesome series of posts. Thanks a lot hesham, Cy-27 and circle-5.

 

[hesham]

Hi,


here is some of Boeing Model-953 variants and Model-953-255 with little details.


http://books.google.com.eg/books?id=-x30LKNlQwMC&pg=PA14&dq=Boeing+953&hl=en&sa=X&ei=P-VMVKqxBcarPLHjgZgJ&ved=0CCIQ6AEwAQ#v=onepage&q&f=false

 

[hesham]

Hi,


here is a 3-view to Lockheed LG-203 or AMST proposal.


http://arc.aiaa.org/doi/abs/10.2514/3.59841

 

[hesham]

Hi,


the MD XC-15 aircraft;


http://www.dtic.mil/dtic/tr/fulltext/u2/a131462.pdf

 

[RAP]

Model of production YC-14. Don't know how accurate this is but found it interesting.

http://www.ebay.com/itm/151703793399?_trksid=p2060353.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT

 

[Stargazer]

Model of production YC-14. Don't know how accurate this is but found it interesting.

http://www.ebay.com/itm/151703793399?_trksid=p2060353.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT

Very nice! But what do you mean by "how accurate"? This is certainly a genuine company model and not a South East Asian replica, given the stand, plate and fuselage lettering, so it is bound to be accurate in the sense that it corresponds to Boeing's proposal for a production version. Now whether a procured version would actually have looked like that in the end or not is impossible to know, though experience shows us that production types have rarely looked like desktop model projections... ;-)

Thanks for sharing, anyway!

 

[Triton]

Model of McDonnell Douglas YC-15 manufactured by Pacific Miniatures found on eBay.

Source:
http://www.ebay.com/itm/1970s-Prototype-Aircraft-Desk-Model-YC-15-McDonnell-Douglas-Pacific-Miniatures-/151703776178?pt=LH_DefaultDomain_0&hash=item23523febb2

 

[RAP]

Large binder of documents for Boeing YC-14.

http://www.ebay.com/itm/291586667613?_trksid=p2055119.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT

 

[fightingirish]

YC-15 Utility Flight Manual
A copy of the company produced Flight Manual, Report No. MDC J6005, dated Jan 1977 for the McDonnell Douglas YC-15 aircraft. Credit: Manual via Irfan S. Hokan

Click here to download the manual in PDF form (111 megs)

Source: Aviation Archives Blog - YC-15 Utility Flight Manual

 

[Avimimus]

I take it that the XC-15's thrust vectoring was limited to thrust reversal? Or could it do another function like trim?

I'm also curious about why drooping leading edges are used inboard but slats are used on the outer wing (If anyone knows more about aerodynamics than me - I'd appreciate the insights)?

 

[AeroFranz]

slats continue to function at higher angles of attack. they are in front of the ailerons, which need to remain effective even though the inboard might be stalled.

 

[Avimimus]

Thanks - that makes a tremendous amount of sense!

 

[The Artist]

Art of the Bell AMST prototype, which was obviously to be built from C-130 parts.

Thanks Orionblamblam for sharing this find!!
Never knew Bell submitted a design, let alone one as large as the AMST comp!!
I wonder what involvement Lockheed had in this proposal, as you have pointed out - the submissions heavy C-130 part usage. Or was Bell's submission a proposal of utilizing already existing USAF C-130's???

Regards
Pioneer

Not just the C-130. The wings and tail look to be from the C-141 Starlifter.

 

[The Artist]

An R.G. Smith painting that came into the Greater St Louis Air & Space Museum's collection a few months ago.

 

[Dynoman]

YC-14 Refueling Tests

 

[sferrin]

https://www.youtube.com/watch?v=CI8Hl9REDqw

Such a shame. . . :'(

 

[Triton]

Model of Boeing YC-14 manufactured by PacMin.

Source:
http://www.ebay.com/itm/PACMIN-Pacific-Miniatures-Boeing-YC-14-In-Camo-Paint-Mint-Condition/282661374002?hash=item41cfee4832%3Ag%3Aj%7EUAAOSwy6VZwfNS

 

[famvburg]

Not mine but may be of interest.
https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.com%2Fulk%2Fitm%2F123403518791

 

[Triton]

Nice find famvburg. B)

Not mine but may be of interest.
https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.com%2Fulk%2Fitm%2F123403518791

 

[nugo]

Hi All !

Maybe, C-130 replacement competition proposal or Boeing initiated proposal of the C-130 replacement ?

 

[taildragger]

It's a strange duck.
- based only on the size of the windscreen it looks smaller than a C-130
- the aft fuselages is clearly shaped to allow a cargo ramp, although it's not depicted
- the curved windscreen panels suggest something from no earlier than the mid-70s, but I'd think that proposal models from that period would tend to depict current liveries - SEA camo or MAC white over grey
- what is the point, in that period, of 4 smallish engines podded in twos?

 

[Archibald]

I did some searches about CFM and the CFM56 origins. It is said that General Electric proposed SNECMA the CF6 technology, then went with the more advanced F101 core, all this because of the AMST RFP issued in 1971-72. Yet I checked, and the Boeing YC-14 used, not CFM56s, but actually CF6s.

So in a sense, CFM went through all the trouble of getting a F101 core licence for AMST / YC-14 (DoD and Kissinger blocked it for an entire year and only Pomidou saved the day), only for that aircraft to get the "older" CF6 ?

 

[CJGibson]

Hmmmm...I wonder if this is the the elusive SOR.198 type I discuss in Atlas?

Chris

 

[Jeb]

It's a strange duck.
- based only on the size of the windscreen it looks smaller than a C-130
- the aft fuselages is clearly shaped to allow a cargo ramp, although it's not depicted
- the curved windscreen panels suggest something from no earlier than the mid-70s, but I'd think that proposal models from that period would tend to depict current liveries - SEA camo or MAC white over grey
- what is the point, in that period, of 4 smallish engines podded in twos?

It doesn't look like gear doors or other access are depicted either, so I think if anything this is intended to convey what a small transport powered by TF33s would look like. Because if those aren't supposed to be B-52-style podded engines, I'd be shocked.

 

[Triton]

Winning bid on eBay was $382.80 US. I wonder if the buyer recognizes the concept?

 

[aim9xray]

I'm not the buyer, but think that this is likely the Boeing Model 953-210; seen elsewhere on SPF.

https://www.secretprojects.co.uk/forum/index.php/topic,512.msg234292.html#msg234292

 

[CJGibson]

Nah, too wee.

Chris

 

[hesham]

I'm not the buyer, but think that this is likely the Boeing Model 953-210; seen elsewhere on SPF.

https://www.secretprojects.co.uk/forum/index.php/topic,512.msg234292.html#msg234292

Or Model 953-249 ?.

 

[Orionblamblam]

The Bell tech demonstrator:

More info:
http://www.aerospaceprojectsreview.com/blog/?p=3631

 

[hesham]

Amazing my dear Scott.

 

[Orionblamblam]

And the proposed operational advanced medium STOL transport by Bell:

This design, like the C-130 derived tech demonstrator, was to use thrust vectoring and augmentor wings to produce vertical lift or short (not vertical) takeoff.

More info:
http://www.aerospaceprojectsreview.com/blog/?p=3631

 

[Orionblamblam]

https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.com%2Fulk%2Fitm%2F123403518791

Hmmm. Maybe?

I have a vague recollection of seeing a simple three-view of a design similar to that of the model in a NASA publication on transport aircraft tech from the 70's.

 

[hesham]

Hi,

https://apps.dtic.mil/dtic/tr/fulltext/u2/a041536.pdf