CX-HLS (Cargo Experimental, Heavy Logistic Support) designs & derivatives

[Pioneer]

Found this pic of Boeing C-5 fuselage mock-up in Air Pictorial, March 1965.

Regards
Pioneer

 

[hesham]

You are bidding on an original press photo from 1964 featuring Artist's Concept of Boeing Transport Design The Boeing Co's bid to develop and produce the proposed CX-HLS heavy transport for their Air Force is based on company-funded studies beginning in late 1961, Boeing Magazine reported yesterday. Boeing is one of three major aerospace firms engaged in competition to design the CX-HLS (Cargo, Experimental, Heavy Logistics System.) The other contenders are the Lockheed Aircraft Corp. and a team headed by the Douglas Aircraft Co. Operations analysis, engineering design, testing a n d other work applied to the transport concept between 1961 and mid-1964, when the first study contract was awarded, have cost $10 million in Boeing funds, the company said. Boeing noted that in late 1961 its operations analysts carried out a study of the factors involved in the transportation of Army divisions by air. Studies in early 1962 made use of electronic computers to "load" all types of Army vehicles, including tanks a n d other heavy fire1964-10-20T14:02:33+05:30go compartment of various sizes. The purpose of this exercise was to determine the best fuselage size for maximum aircraft efficiency. Boeing Engineers later studied transport aircraft ranging from 400,000 pounds gross weight to more than 1 million pounds. Additional studies were made to determine which design would provide maximum cost effectiveness. Boeing studies showed a fleet of large logistics transports, such as the type studied, not only would provide vastly more efficient air lift but would do so over a ten-year period at a saving of "billions of dollars over presently programmed air lift." The basic concept for a CX-type transport has been substantially improved and re-fined by the company. At the moment, Boeing has a team of about 600 employes assigned to the CX-HLS project. Head of the team is H. W. Withington, long-time Boeing engineering executive. . Photo is 8” x 10” in size.

URL:

http://www.ebay.com/itm/1964-Boeing-Airplanes-Sketch-Press-Photo-/200812578339?pt=Art_Photo_Images&hash=item2ec15cc623

From Boeing magazine 1964

 

[Scott Kenny]

I wonder if the STF200 was an all-new design or similar in concept to the far later refanned JT8D-200 series?

It is noteworthy that Rolls-Royce was promoting a refanned Medway in this era as well - the 22,000lb st RB177-2.

The great irony is that it took longer than expected for high bypass ratio turbofans to dominate the commercial airliner market.

Takes a while to get the new fans civilian-certified, and the airlines are unlikely to want to divest of their existing planes till they're fully depreciated. 10 years minimum service time, and often closer to 20 years in service before their initial buyer sells them off. It'd take an absolutely enormous fuel price hike to make airlines even consider the idea, and that price would have to stick for almost a decade.

So while some planes got re-engined with JT3Ds or CFM56s, that wasn't until the 1980s. Everything else was new build (757, 767, A300 series) so basically replaced 707s etc when the airlines sold off theirs. 727s were still going pretty strong in 1998, and just getting an engine with a giant muffler to comply with noise rules. MD80/90s got fans to comply with noise rules.

Barring some oddities like the gravel kit equipped 737s. Those are the old skinny jets and will never, can never be fans.

 

[publiusr]

Found this pic of Boeing C-5 fuselage mock-up in Air Pictorial, March 1965.

Regards
Pioneer

The 777 engines could have gone under that shoulder mount wing with less problem than that single one on the 747 testbed:

This weird-looking plane isn't a joke

When GE tests a huge new engine, it mounts it on an old 747. Boy, does it look odd.

www.cnet.com

A missed opportunity for a two-fer.

As fans get larger…maybe dihedral gull wing mounts at the roots for even more ground Clarence…wait…