The Bristol Boscombe ACI.1

In 1946, the Telecommunications Research Establishment (TRE) acquired a Bristol Freighter to serve as a flying testbed for advanced radar and electronic systems. The Freighter was an ideal platform, as the low cost of the aircraft offset the expensive and sophisticated equipment it was used to test. Its capacious interior and robust, simple design provided ample room and reliability for experimental modifications. 

Under TRE's stewardship, the Freighter evolved rapidly, being fitted with increasingly advanced technology. Its large size enabled the installation of massive antenna dishes, capable of tracking aircraft over at least 150 square miles. Engineers discovered that a Fore-Aft Scanner System (FASS) offered the most effective coverage, maximizing the radar's field of view. 

In 1949, the TRE showcased the aircraft's capabilities to members of the armed forces. Both the RAF and Royal Navy expressed interest, with the RAF stating that for the right price, an evaluation squadron could be set up to explore the usefulness of such a system. Sir Bernard Lovell of TRE highlighted the wartime success of the TRE Wellington ACI (Air Controlled Interception), which had guided Mosquitos to intercept V1 flying bombs, and emphasized the greater capabilities of this new system. 

Following these discussions, TRE engineers collaborated with Bristol designers to conceptualize a dedicated flying radar platform. Just three months later, a privately funded prototype took to the skies. Designated the Bristol Boscombe ACI.1, the new aircraft was based on the Freighter airframe but featured new modifications. These included extended nose and tail sections to house the FASS radar system (code-named Green Fork) and wingtip fuel tanks, each holding 495 gallons, for extended operational range. Additional antennas from various TRE projects enhanced its functionality. It is believed that the ACI.1 could track aircraft and surface vessels, intercept enemy communications, conduct jamming operations, and even monitor weather patterns. 

The Boscombe entered RAF service in late 1950 with an initial order of 12 aircraft. The Royal Navy procured one for evaluation, though it was later transferred to the RAF. The ACI.1 quickly proved indispensable, particularly in overseas conflicts where RAF infrastructure was limited. Its short takeoff and landing (STOL) capabilities and ability to operate from unprepared airstrips made it invaluable in regions like Southeast Asia and Africa. In Europe, Boscombes were stationed in West Germany and at RAF Lossiemouth. 

The aircraft also attracted international attention. The United States involved Britain in its BARLANT (Atlantic Barrier) program, allowing the Boscombe to operate from NAS Keflavik in Iceland. 

In 1956, the improved ACI.2 variant was introduced. Key upgrades included a fully retractable undercarriage, enhanced aerodynamics, increased internal fuel capacity, and cutting-edge technology from the newly renamed Radar Research Establishment. The ACI.2 served on the frontlines until 1963, when it was succeeded by the AW Argosy AEW.3. However, the Boscombe ACI.2b variant continued in a training role until 1967, cementing its legacy as a versatile and pioneering platform in airborne radar and electronic warfare.

An excellent model, and a totally credible backstory.   I am impressed!

Quote from: Rheged on January 19, 2025, 11:01:18 AMAn excellent model, and a totally credible backstory.  I am impressed!

Thank you very much! It turns out that part of the story was true (which I didn't realise until AFTER writing the back story).

It turns out that the TRE DID use a Bristol Freighter as a radar testbed. 

Interesting build and story. It's the original Airfix Superfreighter nose or did you lengthen it?

Hehehehe, the RW is catching up with us. Must be a time warp around somewhere.................. 

Quote from: loupgarou on January 19, 2025, 11:53:37 AMInteresting build and story. It's the original Airfix Superfreighter nose or did you lengthen it?

Thank you very much. It's the original nose for the Superfreighter.

Quote from: PR19_Kit on January 19, 2025, 11:55:04 AMHehehehe, the RW is catching up with us. Must be a time warp around somewhere.................. 

This happens multiple times to me. Like when I designed a modernised Grumman J2F Duck, which turned out to look almost exactly like the Columbia XJL 

Plausible story & an excellent model - it looks very rugged!

Well done 

Oh, l like that. A sound design with a credible backstory. Well done!

What can I add?   ... 

Neat build and a fascinating read   

If they'd have replaced the Centaurii with a couple of Tynes they could have kept it flying for quite a bit longer maybe? 

Quote from: PR19_Kit on January 20, 2025, 07:57:31 AMIf they'd have replaced the Centaurii with a couple of Tynes they could have kept it flying for quite a bit longer maybe? 

Well that depends on the fuel load 

Quote from: PR19_Kit on January 20, 2025, 07:57:31 AMIf they'd have replaced the Centaurii with a couple of Tynes they could have kept it flying for quite a bit longer maybe? 

Those could be added to the list of upgrades in the ACI.2 perhaps? 🤔