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Boeing 751 STOL airliner

overscan (PaulMM)

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Developed with Aeritalia, 751 uses the augmenter-wing concept (other similar designs using internally or externally blown flaps).
Carry 100 passengers 805km from a 600m STOL strip. Approach speed 148km/h, cruise speed Mach 0.8, 95PndB noise footprint at 152m distance. Engines are unspecified 20000lb turbofans
Span: 36.42m
Length: 45.01m
 

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boxkite

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Some additional material from "Der Flieger" 5/1972
 

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boxkite

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Boeing and Aeritalia started to work together on this project in 1970. Wind tunnel research was done in Renton (Wash.), where 40 Aeritalia engineers worked. C. S. Howell by Boeing and Fausto Cereti by Aeritalia led the group. It was planned to build each one aircraft (for 100 – 150 passengers) in Italy and the USA in 1974 or 1975.
Dimensions (for readers in Continental Europe ;))
Span 36.43 m
Length 45.21 m
Length of the fuselage 39.12 m
Height 10.92 m
 

TinWing

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boxkite said:
Boeing and Aeritalia started to work together on this project in 1970. Wind tunnel research was done in Renton (Wash.), where 40 Aeritalia engineers worked. C. S. Howell by Boeing and Fausto Cereti by Aeritalia led the group. It was planned to build each one aircraft (for 100 – 150 passengers) in Italy and the USA in 1974 or 1975.

I have to wonder about the wisdom of producing a solely civilian STOL airliner when the comtemporary AMST requirement lead to Boeing's own YC-14 prototype - which was similar in size but far different in configuration.

In this case, it is easy to see why the project didn't go forward. The whole operating concept of using STOL airliners from intercity airports was economically and environmentally undesirable.

Of course, that didn't stop BAe 146!
 

elmayerle

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Sentinel Chicken said:
That's a helluva lot of trim dialed into the horizontal stabilizer in the image showing the 751 landing!

If I'm analyzing the design correctly, it's needed. STOL operations would induce quite a nose-down pitching moment that would require quite a lot of trim to deal with.
 

Triton

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Three-view drawing of Boeing-Aeritalia BA.751 QSTOL aircraft.

LICHTE, M. SLENDER DELTA WINGS FOR FUTURE SUBSONIC COMMERCIAL AIRCRAFT

Abstract:
THE AERODYNAMIC CHARACTERISTICS OF SLENDER DELTA WINGS FOR SUBSONIC COMMERCIAL AIRCRAFT APPLICATIONS ARE DISCUSSED. THE FLOW DISTRIBUTION ON THE WING FOR VARIOUS AIRSPEED CONDITIONS IS DESCRIBED. THE CHARACTERISTICS OF CONVENTIONAL WINGS ARE COMPARED WITH THOSE OF THE SLENDER DELTA WING. GRAPHS OF THE PERFORMANCE OF THE SLENDER DELTA WING FOR VARIOUS CONDITIONS OF GROUND EFFECT, ANGLE OF ATTACK, GLIDE CONDITIONS, AND AERODYNAMIC STALL ARE INCLUDED.

TRANSL. INTO ENGLISH FROM FLUG REV. (WEST GERMANY), NO. 2, 1973 P 27-37
http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19730017304_1973017304.pdf
 

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hesham

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Hi,

here is some Boeing Model-751 variants.

http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19740005605_1974005605.pdf
 

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hesham

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And;
 

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Jemiba

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From Aviation Week 1973 a drawing, that may belong to
the same theme:
 

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hesham

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Hi,

I found anther two variants to Boeing Model-751,
751-103 and 751-106.


http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19760066510_1976066510.pdf
 

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archipeppe

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Really interesting!!
I never heard before about Aeritalia/Boeing cooperation in the field of STOL civilian aircraft.

Not so surprising anyway, considering the Boeing know-how and the Italian interest in such aircraft type (since Aeritalia was still FIAT Aviazione and it led to G-222 family).
 

Triton

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Boeing and Aeritalia were also going to be partners on the 7X7 airliner project that would eventually became the Boeing 757.

For additional information on the Boeing 7X7:
http://www.secretprojects.co.uk/forum/index.php/topic,3241.0/highlight,7x7.html
 

Triton

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Grumman Boeing STOL airliner concept photo circa 1971 found on eBay.

Source:
http://www.ebay.com/itm/1971-Boeing-Soft-Take-off-and-Landing-Press-Photo-/190705267945?pt=Art_Photo_Images&hash=item2c66eb74e9
 

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Triton

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Boeing Aeritalia STOL airliner concept photo circa 1971 found on eBay.

Source:
http://www.ebay.com/itm/1971-Boeing-Soft-Take-off-and-Landing-illustration-Press-Photo-/190705268156?pt=Art_Photo_Images&hash=item2c66eb75bc
 

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fightingirish

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Artist's Conception of Proposed Boeing/Alitalia STOL (Short Takeoff and Landing) aircraft.
Permalink: http://www.boeingimages.com/archive/Artist's Conception of Proposed Boeing/Alitalia STOL-2F3XC54FG8O.html
 

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Stargazer2006

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Excellent color version of this beautiful image. However it should read "Aeritalia", not "Alitalia". The former being an aircraft manufacturer, and the latter an airline!
 

archipeppe

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Skyblazer said:
Excellent color version of this beautiful image. However it should read "Aeritalia", not "Alitalia". The former being an aircraft manufacturer, and the latter an airline!


Yep, Aeritalia (Aircraft manufacturer) + Selenia (radar and avionics manufacturer) become Alenia at the end of 80's.
Currently is Alenia-Aermacchi Aeronautica (after the fusion with the former Aermacchi firm) a Finmeccanica company.
 

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Drawing from Aviation Magazine 565.
 

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VictorXL188

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Re Boeing/Aeritalia BA-751, a report in the January 1972 issue of Air Enthusiast stated that the preliminary agreement was signed between the two companies in June 1971. The report stated that the aircraft would be medium-sized carrying between 80 and 150 passengers over a range of about 500 miles (805km). Phase Two of the project was ongoing at the time of the report, covering the precise definition of the characteristics of the new airliner. Phase Three would cover construction and testing of two prototypes with a target first flight date of 1975. Phase Four would cover production with deliveries expected to start around 1980. Aeritalia would provide a new production facility in the south of Italy, with this facility first being used to produce examples of the Fiat G.222 transport prior to the new airliner. The development costs which were to be shared from both companies were estimated in the region of £272m.
 

VictorXL188

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Re Triton's post Reply #14 on: September 06, 2012, regarding the Boeing-Grumman design, this was a design which was awarded a Phase 1 contract from NASA for a Quiet Engine Experimental STOL aircraft. the only other companies submitting proposals were Lockheed and McDonnell Douglas. This Phase contract covered a six month period, at the end of which NASA was to select the winning entry. The successful manufacturer had to then produce two prototypes, with the target first flight dates of September 1974 and March 1975 (The competition had started in Dec 1971). The Grumman entry was boosted by the addition of Boeing in certain elements of the design. The basic fuselage utilised was that of the Grumman Gulfstream II, with a high wing carrying four underslung engines and a modified tail unit from the Boeing 737. The Lockheed proposal was reported to be based on the JetStar but with wing mounted engines. McDD had proposals based on the DC-9, in addition to wholly new designs, which I have yet to see.
 

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