Boeing 2700 SST Patent

I always thought this was a good design, but Boeing insisted in sizing it for ~300 passengers, which I admit, was what the proposal called for.

The variable sweep wings would have allowed about 60% less thrust for takeoff and approach and the engines were originally designed for cruise thrust, not takeoff. This was a first for the commercial industry. As long as the engine pressure ratio was high enough at 70,000-80,000 ft, the plane would have had minimal fuel consumption for that class of aircraft up to that time.

I admit I never could figure out why they needed all that fuel when smaller engines would have made for a much lighter plane and the same speed at altitude.

"Supersonic Airplane Variable-Sweep Integrated Airfoil system"
http://www.google.com/patents?vid=USPAT3447761

You can also download this patent for no extra cost at:

www.pat2pdf.org

Enter the patent number on the search line with no commas.

Here's the followup design, also by Boeing:

"Supersonic aircraft and Method"
http://www.google.com/patents?id=P0gkAAAAEBAJ&printsec=abstract&zoom=4

Can you find the patent for the L-2000 or L-2000-7A?

KJ

That would be difficult, since I just tried looking on Google and the U.S. Patent Office.

Patents are classified by what they do, but, unfortunately, not what they look like per se.

I went through some of the sub-classifications that dealt with such things as 'high altitude aircraft' or possibly 'balloons that gain high altitude' as such or in that vein; different kinds of specially functioning aircraft wings, etc,etc.

A Google search of archived records may be more rewarding, as well as cited past patents to the patent I posted.

For example, with regard to what I posted: #5114100 & #5094411 deal with aircraft wing flaps,

#4168044 has to do with a new kind of 'uplift SST' that indicates its basic design superimposed on a late-model SST which was a follow-on to the B2700-100 with a solid delta wing. The other cited sub-patents would feature similar components or competing designs in either patent I had originally posted.

Update:

American Patent #3,478,989 is by a German, but gives an aircraft with the superficial appearance of the L-2000, thusly:

http://www.google.com/patents?id=JlxuAAAAEBAJ&dq=patent:3478989&as_drrb_ap=q&as_minm_ap=1&as_miny_ap=2008&as_maxm_ap=1&as_maxy_ap=2008&as_drrb_is=q&as_minm_is=1&as_miny_is=2008&as_maxm_is=1&as_maxy_is=2008

I think I saw the Design Patent for the original Lockheed 2000 SST once, but I didn't keep the number or print off a hard copy.

I got lucky and came across this one looking for something else.