Boeing and Republic ADO-12 / "US/FRG" / AVS VG V/STOL Fighter Program

uk 75

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The US West German strike fighter project was very much like anime art. So many variations of the basic design were drawn and modelled. A browse through this thread will show you how weird and wonderful they were.
It is my avatar in the version I first saw and fell for in a magazine back in the 70s.
 

Archibald

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I like the way they treated banks of liftjets like antigravity modules... :D there was really some kind of "cult" with liftjets, back then.

"Hey folks, a barn ! Let's strap 128 liftjets to it and make it fly !"
 
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overscan (PaulMM)

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See also:

Boeing Model 956 for US/FRG seems to fit with the Boeing/Bolkow wind tunnel model, probably dating the design to 1964 and the earliest studies.

boeing-unknown-2-jpg.125261


boeing-bolkow-avs-jpg.550184


Ryan Model 187 possibly a submission for US/FRG (artwork is mostly depicting West German markings)

ryanadvancedvertifan-png.550508


 
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overscan (PaulMM)

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So - 4 US contenders were selected from 9 bids for US/FRG in August 1965 as follows:
  • Boeing
  • McDonnell
  • Lockheed & Bell (team)
  • Republic

2 German bids were selected from
  • VFW
  • EWR

By September 1966, EWR had won the German competition.
By December 1966, Republic had won the US competition.

Source: Aviation Week & Space Technology August 23 1965, September 6 1965, September 12 1966, December 5 1966
9 US Bids

Confirmed:
  • Boeing
  • McDonnell
  • Lockheed (& Bell)
  • Republic

Intended bidders according to Flying Review June 1965:

  • EWR
  • General Dynamics
  • North American
  • Lockheed
  • Northrop
  • Ryan
  • Republic
 

overscan (PaulMM)

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MAJ. GEN. STRAIT: I went to work for Republic in '69. They invited me to come down and talk to the president of Fairchild Hiller it was. I did and he offered me a hell of a job. At that time I was beginning to run out of gas with the Guard and there wasn't much for me to do, no challenges. So he offered me a pretty good salary jump. So I said, well. I talked to my wife and she's a Long Island girl so we had a chance to go back to Long Island and we moved into a lovely place in Babylon. So they offered me a job to come to work for Republic, but I was going to become the project officer on a joint contract that we had with Germany to develop a VSTOL fighter, USFRG it was called, a USFRG. This is a pretty substantial contract. So I went to Republic and went there for a few months and then they sent me to Germany, over in Munich. I worked with Messerschmitt-Bölkow on --

CMSGT. ANDERSON: How ironic.

MAJ. GEN. STRAIT: Yeah, in the development of this fighter. This fighter was -- the airplane it had swing out lift engines. In other words, we had -- we could deflect the thrust vertical off the back by the nozzles, but we had to have some way to get the lift on the wings. So we had swing out engines which we would start up and so that the airplane had an engine here, an engine here, and an engine here, which made -- would give it vertical movement. Well, we never could get the swing out lift engines to really be a reliable commodity. So after I was there about a year the United States Congress decided that there wasn't enough progress being made and they withdrew the funds on the contract and the Germans bailed out. I came home.

AIR NATIONAL GUARD ORAL HISTORY TAPE TRANSCRIPTION INTERVIEW OF Major General DONALD J. STRAIT,

 

overscan (PaulMM)

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overscan (PaulMM)

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Source:
Kirk & Barrack, Aerodynamic characteristics of a large-scale lift-engine fighter model with external swiveling lift-engines
NASA-TM-X-62167
 

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overscan (PaulMM)

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From Cradle of Aviation Museum collection (watermarked)
What is the third design ?
cradle-17956-jpg.671308


This? It is closely related to Republic's US/FRG known proposals but with a different powerplant arrangement, possibly tandem fan? I'm fairly sure I've seen a NASA report of wind tunnel studies of this design but I couldn't locate it.

It is labelled "US-GER VTOL fighter model", the same as the other US / FRG pics posted..
 

richard B

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From Cradle of Aviation Museum collection (watermarked)
What is the third design ?
It is closely related to Republic's US/FRG known proposals but with a different powerplant arrangement, possibly tandem fan? I'm fairly sure I've seen a NASA report of wind tunnel studies of this design but I couldn't locate it.
It is labelled "US-GER VTOL fighter model", the same as the other US / FRG pics posted..

Thank you !
 

overscan (PaulMM)

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"EWRSüd and Boeing are already working together on the VJ - 101E , F and G ( generically known as the Boeing - EWR 360) . VFW's proposal is thought to spring from its work on the 1262 light V / STOL attack fighter under development"

Flight International (will locate exact source when I have access to my files).
 

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I believe that the idea behind the pop-out liftjets was that the T/W of the XJ99 looked attractive, but that the volume penalty of the inlet+motor+exhaust was unwelcomely large. Also, you could rotate the pop-out jets for STOL.
 

overscan (PaulMM)

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yes, I understand the thinking, but the thought of engines hanging outside the aircraft fills me with dread from a structural and complexity viewpoint.
 

overscan (PaulMM)

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So, here's McDonnell-Douglas' proposal for US/FRG. Probably designated Model 193.


Note there are two different intake designs known, which are exactly the same as the two intake designs on the Republic AVS (ventral intakes, and side intakes under the wing in roughly F-111 position).

The only missing bid now is Lockheed & Bell. I can't find any trace of such a project in Lockheed model indices so far.
 

overscan (PaulMM)

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"In addition, ADO-12 has developed into the joint U.S./ FRG V/STOL tactical fighter program"

"In late 1964, the Department of Defense directed that our V/STOL fighter activities be continued in a cooperative effort with the Federal Republic of Germany. As a first step, a joint U.S./FRG advanced V/STOL fighter design study was undertaken with four U. S. and two FRG aircraft companies. This study was completed in early spring of 1966 and since then a joint US/FRG evaluation group has identified performance and configuration characteristics which appear attractive to both Air Forces. Pending approval of both governments, we hope to carry out a joint prototype development and evaluation program involving twelve aircraft. This prototype program should provide a firm basis for decision for follow on operational requirements and furnish convincing answers to many issues which cannot be satisfactorily treated in studies alone."

 
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overscan (PaulMM)

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One of the problems facing the Army and the Air Force is that results of several aircraft studies may come too late for inclusion in the fiscal 1969 budget. An example is the USAF/ FRG V/STOL fighter. Reprogramming may be necessary. In addition fears of reductions in much non-Vietnam spending are widespread. A contract definition decision on the proposed German-American strike aircraft is an- ticipated in November with a go or no-go action on the construction of 12 prototypes due early next year. All of these variable wing V/STOL aircraft would be built in Germany although engines will come from U.S. and possibly United Kingdom sup- pliers. The possibility of British entry into the complete aircraft program re- mains “warm.”

 
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overscan (PaulMM)

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Republic ADO-12 Reports

1399 10
ADVANCED V/STOL TACTICAL FIGHTER WEAPON SYSTEMS (ADO-12 PHASE 1) FINAL PRESENTATION
AD-354970 65-1 DIV.1A

1399 5 VOL 1
ADVANCED V/STOL TACTICAL FIGHTER WEAPON SYSTEM (ADO-12, PHASE 1) VOLUME I. SUMMARY
AD-354958 65-1 DIV.1A

1399 5 VOL 2 SEC 1
ADVANCED V / STOL TACTICAL FIGHTER WEAPON SYSTEM (ADO 12, PHASE 1) VOLUME II. SECTION 1. AIR VEHICLE CONFIGURATION.
AD-354959 65-1 DIV.1A

1399 5 VOL 2 SEC 2
ADVANCED V / STOL TACTICAL FIGHTER WEAPON SYSTEM (ADO 12, PHASE 1) VOLUME II. SECTION 2. ENGINES AND PROPULSION
SYSTEMS
AD-354960 65-1 DIV.1A

1399 5 VOL 2 SEC 3
ADVANCED V / STOL TACTICAL FIGHTER WEAPON SYSTEM (ADO 12, PHASE 1) VOLUME II. SECTION 2. STRUCTURAL DESIGN, MATERIALS AND WEIGHTS.
AD-354961 65-1 DIV.1A

1399 5 VOL 2 SEC 4
ADVANCED V / STOL TACTICAL FIGHTER WEAPON SYSTEM (ADO 12, PHASE 1) VOLUME II. SECTION 4. MILITARY SUBSYSTEMS AND WEAPON SYSTEM INTEGRATION.
AD-354962 65-1 DIV.1A

1399 5 VOL 2 SEC 5
ADVANCED V / STOL TACTICAL FIGHTER WEAPON SYSTEM (ADO 12, PHASE 1) VOLUME II. SECTION 5. HUMAN FACTORS AND CREW ACCOMMODATIONS.
AD-354963 65-1 DIV.1A

1399 5 VOL 3
ADVANCED V / STOL TACTICAL FIGHTER WEAPON SYSTEM (ADO 12 , PHASE 1) VOLUME III. OPERATIONS ANALYSIS .
AD-354964 65.1 DIV.1A

1399 5 VOL 4
ADVANCED V / STOL TACTICAL FIGHTER WEAPON SYSTEM (ADO 12 , PHASE 1). VOLUME IV. MASTER PLAN AND COST ESTIMATE
AD-354965 65-1 DIV.1A

1399 5 VOL 5
ADVANCED V / STOL TACTICAL FIGHTER WEAPON SYSTEM (ADO 12, PHASE 1) VOLUME V. TECHNOLOGICAL ADVANCEMENTS NEEDED
AD-354966 65-1 DIV.1A

1399 5 VOL 6
ADVANCED V / STOL TACTICAL FIGHTER WEAPON SYSTEM (ADO 12 , PHASE 1) VOLUME VI. RECOMMENDED OPTIMUM V / STOL WEAPON SYSTEM CONFIGURATION
AD-354967 65-1 DIV.1A

1399 5 VOL 7
ADVANCED V / STOL TACTICAL FIGHTER WEAPON SYSTEMS (ADO 12 , PHASE 1) VOLUME VII. LOGISTICS .
AD-354968 65-1 DIV.1A

1399 5 VOL 8
ADVANCED V / STOL TACTICAL FIGHTER WEAPON SYSTEM (ADO 12, PHASE 1) VOLUME VIII.
AD-354969 65-1 DIV.1A

 
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uk 75

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The version at #151 looks very like the version shown in my Avatar and which I had modelled for me a few years ago.
 

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overscan (PaulMM)

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BIOGRAPHICAL DATA - VAUGHN L. BLUMENTHAL

Mr. Blumenthal joined The Boeing Company in 1941, and for the following ten years was involved in aerodynamic performance analysis of B- 17, B - 29 , 377 Stratocruiser and C-97 airplanes ; and as senior aerodynamicist on the B -52 program was responsible for the complete aerodynamic development and performance definition of that airplane. He then was assigned to Preliminary Design to direct the B-52 Improvement Program , accomplishing research and analysis that resulted in development of the F Model, and G Model extended range program. In 1958 as Chief of Preliminary Design , he effected the planning and coordination of advance aircraft and missile research that established the basis for the Company's entry into the Minuteman and Dynasoar programs. Later, as Tactical Systems Development Program Manager, he had similar research and development responsibilities that led to the Boeing TFX effort. Mr. Blumenthal then served as Chief Engineer of the TFX program during the competition period. Later as Program Manager of Advanced Tactical Systems, he directed the study and proposal efforts on VAX, ADO-12 and international tactical fighter development.

 
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overscan (PaulMM)

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The engine-performance picture has changed radically and unexpectedly for the better. Advanced engine research, sponsored primarily by the USAF, has paid off handsomely. One indication was given to the Price subcommittee by Republic Aviation officials in a brief review of their 1963-1964 ADO-12 (advanced development objective) study for the Air Force. This was to provide guidance for prototype development of subsonic and supersonic V /STOL fighters. Republic reported that the consensus of the engine manufacturers was that the next generation of lift engines could have a thrust-to -weight ratio of 25 to 1, and that lift-cruise engines would reach 8 to 1. The lift-cruise type are basically conventional turbojet or turbofan engines with swiveling nozzles or other relatively heavy devices for diverting the thrust downward during takeoff and landing. Dr. Brown disagreed with these estimates somewhat in his testimony. He said that 18 to 1 thrust-to-weight ratio was more likely for lift engines, with growth potential of 20 to 1 possible before radically new high -temperature materials would be needed.
Air Force Magazine, May 1965
 

overscan (PaulMM)

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The big story now being worked on at Republic is the application of vertical flight capability to multi mission fighter- bomber systems design . The potential breakthrough involves a program now in formulation as a joint undertaking of the United States and the Federal Republic of Germany to develop and evaluate prototype V/ STOL aircraft in combat configurations. Nearly a million engineering man- hours in V /STOL technology at Republic, and extensive backgrounding in related parametric studies, go far to giving this high -priority advanced program a lift UP . bomber design , operations analysis, maintenance and logistics, Republic was selected to undertake concept- formulation studies for the U.S./West German program to prove out the V/STOL concept in fighter-bomber design. The completed Republic studies comprise a massive 12-volume evaluation of the most advanced V/STOL technology and systems applications, to establish hard parameters for the program. The US/ FRG V/STOL development program may well be a major step in creating a new element of our tactical force structure. The development phase of this V/STOL program will give us the answers we require plus spin -off applications for other than military systems.

Fairchild Hiller Advert in Air Force Magazine April 1966.

Includes this wind tunnel model which looks familiar.... US-FRG-WindTunnel.png

From https://www.secretprojects.co.uk/th...the-mcdonnell-douglas-f-15.15663/#post-103861

NASA wind tunnel testing of "Republic FX" model in 1965.

l-65-6780-jpg.115508
 
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overscan (PaulMM)

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Proceedings - Society of Experimental Test Pilots Symposium (Volume 11 1967) contains an article 'US/FRG V/STOL Tactical Fighter Program" by George L. Bright of at least 9 pages which looks like it would be HIGHLY interesting if anyone has access to this.

In 1963 George L. Bright also wrote an article 'Mach 2 V/STOL (VJ 101) Flight Test Program'.

George L. Bright was ex US Navy pilot who became the Chief test pilot for German aircraft company Entwicklungsring Sud, and made the first flight of the German VJ-101 X-1 VTOL supersonic fighter. He died in the early 1990’s.

Nearest copy to me is University of Sydney. Lots of copies in US University libraries. There's a even copy at the British Library @uk 75 :)

 
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overscan (PaulMM)

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EWR Reports


EWR - E - 29 / 66 DESIGN STUDY FOR ADVANCED V / STOL TACTICAL FIGHTER WEAPON SYSTEM .
FINAL ORAL REPORT. AD - 382 586L 67-17 FLD . 1 / 3A

EWR - E - 170 / 65 - PT - 1 - VOL 1 DESIGN STUDY FOR ADVANCED V / STOL TACTICAL WEAPON SYSTEM . PART I. VOLUME I . SUMMARY AD - 382 578L 67-17 FLD . 1 / 3A

EWR - E - 170 / 65 - PT - 2 - VOL 1 DESIGN STUDY FOR ADVANCED V / STOL TACTICAL WEAPON SYSTEM , PART II . VOLUME I . POINT DESIGN 1 . AD - 382 579L 67-17 FLD . 1 / 3A

EWR - E - 170 / 65 - PT - 2 - VOL 2 DESIGN STUDY FOR ADVANCED V / STOL TACTICAL WEAPON SYSTEM . PART II . VOLUME II . POINT DESIGN 2 . AD-382 580L 67-17 FLD . 1/3A

EWR - E - 170 / 65 - PT - 2 - VOL 4 DESIGN STUDY FOR ADVANCED V / STOL TACTICAL WEAPON SYSTEM. PART II . VOLUME IV . POINT DESIGN . AD - 382 582L 67-17 FLD . 1/3 A

EWR - E - 170 / 65 - PT - 2 - VOL 5 DESIGN STUDY FOR ADVANCED V /,STOL TACTICAL WEAPON SYSTEM . PART II . VOLUME V. RECOMMENDED PROTOTYPE . AD - 382 583L 67-17 FLD . 1/3 A

EWR - E - 170 / 65 - PT - 2 - VOL 6 DESIGN STUDY FOR ADVANCED V / STOL TACTICAL WEAPON SYSTEM , PART II . VOLUME VI . TECHNOLOGY ADVANCEMENT REQUIREMENTS . AD - 382 685L 67-17 FLD . 1/3 A

EWR - E - 170 / 65 - PT - 2 - VOL 7A DESIGN STUDY FOR ADVANCED V / STOL TACTICAL WEAPON SYSTEM . PART II VOLUME VIIA , SEC . 1 TO 3 . COMMON CONSIDERATIONS AND INFORMATION . AD - 382 584L 67-17 FLD . 1 / 3A

EWR - E - 170 / 65 - PT- 2 - VOL 7B DESIGN STUDY FOR ADVANCED V / STOL TACTICAL WEAPON SYSTEM . PART II . VOLUME VIIB . SEC . 4 . COMMON CONSIDERATIONS AND INFORMATION . AD - 782 585L 67-17 FLD . 1/3A

EWR - E - 170 / 65 - PT - 2 - VOL 7C DESIGN STUDY FOR ADVANCED V / STOL TACTICAL WEAPON SYSTEM . PART II . VOLUME VIIC. SEC . 5 TO 6 7 . COMMON CONSIDERATIONS AND INFORMATION . AD - 382 684L 67-17 FLD . 1/3A

EWR - E - 170 / 65 - PT - 3 - VOL 1 DESIGN STUDY FOR ADVANCED V / STOL TACTICAL WEAPON SYSTEM . VOLUME I . OPERATIONS ANALYSIS . AD - 382 686L 67-17 FLD , 1 / 3A

EWR - E - 170 / 65 - PT - 3 - VOL 2A DESIGN STUDY FOR ADVANCED V / STOL TACTICAL WEAPON SYSTEM . PART III . VOLUME IIA , SEC. 1 TO 3 . LOGISTICS SUPPORT . AD - 382 586L 67-17 FLD , 1 /3A

EWR - E - 170 / 65 - PT - 3 - VOL 2B DESIGN STUDY FOR ADVANCED V / STOL TACTICAL WEAPON SYSTEM . PART III, VOLUME IIB , SEC . 4 TO 6 . 7 . LOGISTICS SUPPORT . AD - 382 687L 67-17 FLD , 1 / 3A

EWR - E - 170 / 65 - PT- 3 - VOL 3 DESIGN STUDY FOR ADVANCED V / STOL TACTICAL WEAPON SYSTEM . PART III . VOLUME III . PROGRAM MANAGEMENT PLANNING AD - 382 587L 67-17 FLD . 1/ 3A

EWR - E - 170 / 65 - PT - 2 - VOL- 3 DESIGN STUDY FOR ADVANCED V/STOL TACTICAL NEAPON SYSTEM . PART II . VOLUME III . POINT DESIGN AD - 382 581L 67-17 FLD . 1 / 3A
 
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overscan (PaulMM)

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We understand the United States and Germany recently decided to cancel a $ 500 million joint project to build and advanced V/STOL fighter plane. What were the details of this agreement, and why the cancellation ?
Answer : On 24 January 1966 we entered into a Design Study ( Phase I ) cotract with four U.S. aircraft firms. Simultaneously, the German Government awarded similar contracts to two German firms. The total U.S. cost was $4.0 million. Both U.S. and German studies were completed on 1 April 1966 and evaluated by a joint project office. In mid -March '67, the U.S. and German Governments jointly awarded a contract to a combined U.S.-German Joint Venture firm for System Definition ( Phase II ) at a U.S. cost of $3.0 million. Prior to entering the Phase II contract it was agreed by both U.S. and German Governments that no further development ( Phase III, prototype acquisition ) would be undertaken unless an operational requirement existed for the aircraft. This requirement was not established .
Question 224 : The testimony continues re V/STOL aircraft : " Indeed we found that, technologically, the pacing item was the engine, and that until we had a suitable engine, none of the approaches were likely to produce a suitable aircraft. Accordingly, beginning in FY 1966, we concentrated our resources on engine development and, through FY 1968 we devoted almost $70 million to this project ; additional funds will be required in FY 1969. Whether this engine will solve the problem is yet to be demonstrated ... How much money will be required in FY 1969, and is the engine ready for testing, or still in the developmental stage ? Answer : There were two different engine programs involved here with a total of $15 million budgeted for both programs. One was a direct lift engine demonstrator program with Allison Division of General Motors and Rolls Royce collaborating. This demonstrator will run for the first time this summer. [ Deleted .] This project is being reviewed and all efforts aimed specifically at the US/FRG project are being stopped. The lift- cruise engine portion of the program involved three contractors : Curtiss-Wright, General Electric and Pratt & Whitney. All three contractors have completed demonstrator engine running. With the cancellation of the US/FRG program this engine program was reoriented toward a technology program to support the FX/VFAX program.

Senator SYMINGTON. We had some previous testimony that none of the V /STOL aircraft proved to be either technically or operationally feasible. As I understand it , the United States and Germany recently decided to cancel a $500 million joint project to build an advance V/STOL fighter plane. Do you know the details of that agreement; and if so, will you file them for the record ?

General HOLZAPPLE. Yes, sir. The information referred to follows -
The US / FRG Tactical Fighter Program was divided into three Phases, each requiring governmental agreement prior to initiation of work. These agreements were prepared by the USAF and executed for the U.S. by either the Director or Deputy Director of Defense Research and Engineering, OSD. The Phase I Agreement ( Design Studies ) was signed on 24 January 1966 and the Phase II Agreement ( System Definition ) on 14 March 1967. A Phase III Agreement ( Prototype Development) was not executed because of the program termination .

The Phase I Agreement provided for a joint effort to study and evaluate design combinations applicable to an advanced V / STOL tactical fighter aircraft, with the results to be used as the basis for a possible joint prototype development project. Each country , working from a jointly- approved Statement of Work, obtained a series of proposed design studies from its own contractors. A Joint Study Evaluation Group was formed to review the work and to seek to prepare a common set of performance and design characteristics to be used as a basis for Phase II. Each Government agreed to fund the Phase I work of its own contractors and to select one of them for the conduct of subsequent Phases of the program. Government-owned technical and user rights were made available to each Government.

The Phase II Agreement provided for a system definition effort based upon the common set of design and performance characteristics developed by the Joint Study Evaluation Group. Engines and major avionics components were to be developed separately and procured jointly for the joint project. Costs ( including procurement, but not development, costs of engines and avionics ) were to be shared equally by the two Governments. The Agreement also contained special provisions to equalize the tax revenue of both countries from the joint project.

The Phase II and Phase III efforts were to be managed by a Joint System Program Office established at Wright-Patterson Air Force Base. The U.S. and German contractors selected for Phase II were required to form a single point of responsibility ( the Project Contractor ) to deal with the System Project Office ; this joint organization was required to possess adequate resources to assure contract performance and the capability of providing both Governments with the required technical information and user rights. The management office of the Project Contractor during Phase II was located in Germany. Under the Phase II Agreement a single contract, using U.S. contracting and pricing procedures, was negotiated with the Project Contractor. All development work was to be performed in the U.S. or Germany, except as otherwise authorized, and would be divided on an approximately equal basis between the two countries. A joint fund was established in a Special U.S. Treasury Account with each country depositing one-half of the Phase II cost ( $ 3,000,000 each ) . The Phase II Agreement also provided that sales of or licenses to manufacture the aircraft or its components developed under the joint project were subject to prior concurrence of both Governments ; recoupment of development costs in the case of such sales or licenses was required. The agreement included an undertaking that each Government would sell to the other, on fair and reasonable terms, components incorporated in the developed aircraft which might be required in their unilateral V / STOL production program . At the conclusion of Phase II, the two Governments were to jointly and unilaterally review the proposed weapons system in order to determine whether to proceed with Phase III, which was to consist of prototype development, acquisition and testing of the V /STOL aircraft developed in accordance with the design and performance characteristics resulting from Phase II. Phase III did not encompass production of the aircraft. If a decision were made to undertake Phase III, the terms of the Phase II Agreement were to be reviewed and an appropriate agreement or supplement for Phase III executed.

1968 Senate Hearings
 

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