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4025th
STRATEGIC
RECONNAISSANCE SQUADRON
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| The RB-57D originated as a competitor by Martin to designs
produced by Bell and Fairchild following a 1952 USAF study funded by
the Wright Air Development Centre for a turbojet-powered special
reconnaissance aircraft with a radius of 2000 nautical miles that
could operate at altitudes of 65,000 feet. Subsonic performance was
considered to be acceptable and it was felt that no defensive armament
would be needed. . The project was carried out in high secrecy. It was
known as Weapon System MX-2147, and the code name was "Bald
Eagle".
Preliminary design contracts were awarded in April 1953 to Bell,
Fairchild, and Martin. On July 1, 1953 these three companies were
awarded six-month contracts for further design studies. The
Martin proposal was an adaptation of the B-57B bomber and was given
the company designation of Model 294.
The RB-57D featured a substantially-altered B-57B fuselage. The
fuselage bomb bay was permanently closed off and the fuselage fuel
tanks were removed. Four camera windows were installed ahead of the
nose wheel well. A large nose and tail radome further lengthened the
fuselage. A power-driven rudder and yaw damper were installed. A new
105-foot wing was fitted, which carried all of the internal fuel in
the aircraft. The fuel cells were integral with the wing, which was of
honeycomb construction--the first time that such a structural feature
had been used in a piloted aircraft. Wing spoilers augmented the
stubby ailerons. Wing flaps and speed boards were eliminated as a
weight saving measure. The J65 engines were replaced by a pair of
10,000 lb.s.t. Pratt & Whitney J57-P-9 turbojets housed in enlarged
nacelles and equipped with anti-icing equipment. It was anticipated
that the aircraft would be able to operate at altitudes in excess of
70,000 feet.
The first RB-57D flew on November 3
1955 and a total of 20 were built with the first deliveries
being made in April 1956. Initially the planes were based at Lockbourne AFB in Ohio
with the 508th Fighter Wing and later
they moved to Turner AFB in Georgia. In early 1957 they were assigned
as the
4025th Strategic Reconnaissance Squadron of the 4080th Strategic
Reconnaissance Wing, at Laughlin which was a part of the Strategic Air
Command (SAC). |
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There were three separate versions,
RB-57D, RB-57D-2 and the RB-57D-1, of which a total of 20 were built,
all of which were flown by the 4025th SRS. These RB-57D had an unusual paint
scheme of white on the top of the wings with black undersides and
tail. The demarcation line between the two colours being
scalloped. US AIR FORCE / serial numbers were in RED. |
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The RB-57D Basic and
RB-57D-1 were "single place" cockpits, meaning that only the pilot
was in the plane. The RB-57D-2 were "tandem" cockpit, with a pilot
in front and a navigator acting as an ECM operator / observer in
back. |
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The RB-57D Basic was
an optical reconnaissance aircraft, the RB-57D-2 were passive ECM
birds, and the RB-57D -1 was an early version with active ECM
and Side Looking Radar (SLR). |
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The RB-57D aircraft
were used during daylight only, although there was flash capability,
it was never used. The D-1 and D-2, however, were normally night
flyers, although they also could be used in daylight hours. The -D
Basics were sometimes used as air sampler aircraft.
The RB-57D featured an altered B-57B
fuselage. The fuselage bomb bay was permanently closed off and the
fuselage fuel tanks were removed. Three camera windows were installed
ahead of the nose wheel well. A new 106-foot wing
was fitted, which carried all of the internal fuel in the aircraft.
There were hard points fitted outboard of the nacelles, which in the
case of the RB-57D is where the Radioactive sampling pods were
located.
The fuel cells were integral with the wing, which was of honeycomb
construction, this was the first time that such a structural feature had been
used in a piloted aircraft. Wing spoilers augmented the stubby
ailerons. Wing flaps and speed boards were eliminated as a weight
saving measure. The J65 engines were replaced by a pair of 10,000 lb.s.t. Pratt & Whitney J57-P-13 turbojets housed in enlarged nacelles that were
trimmed for above 65,000 feet.
Power-driven
rudder and yaw damper were installed, a
fully operational horizontal "stabilator," The honeycombed wings were much lighter and extremely
strong, but were very susceptible to hail damage. The wings had
neoprene fuel bladders installed in them. Wing flap was obviously
more with these wings than the original -B model wings. There
were
heavily-padded canvas "hail covers" available that would be
installed on top of the wings whenever heavy rainstorms or,
especially, hail storms, were forecast. It took many men to
install these heavy and bulky covers and all shops would be put into
action to help put them on.
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RB57D-0 |
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| Of the twenty -57D's built, 13 ,
(tail numbers
53-3970 through 53-3982), were dubbed the RB-57D-0, ( "D Basic.") Six
being in-flight refuelable, the other seven were not.
The first six RB-57Ds were built
according to the original Model 294 specification. They were built as
single seater's and carried two K-38 and two KC-1B split vertical
cameras which occupied the space under the canopy behind the pilot.
The K-38 was on the front of the camera platform with the two
KC-1B Mapping cameras at the rear. The KC-1B's were at an angle
of 55 degrees from the vertical and looked out of the through the
camera viewing panels in the lower section of the fuselage. The K-38
was a split vertical configuration with each aspect of the camera
looking at 9 degrees from the vertical in the opposite direction
(left camera looking right , right camera looking left) and the camera
viewing panel was located under the fuselage just forward of the two
side looking panels This gave the K-38 camera an overlap
and when the two films were placed together a combined image of 9" x
30" could be viewed. Resolution of the K-38 was 3 feet from
65,000 feet.
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The -57D Basics
carried four cameras in a space where a normal backseater would have
occupied. Two of these were normal K-38 9" x 18" 24" focal length
split-vertical cameras with A-8B magazines of 390' film capacity.
These were installed forward of the other two cameras. The K-38 on
the starboard side pointed down at about 9 degrees to port of
nadir. The K-38 on the port side looked down at the same angle the
same amount and to the starboard side. With both K-38s tripping in
unison, a "matrix" of photography was covered whereby the starboard
camera looked a little port, and the port camera looked a little to
starboard and the matrix was 9" wide by approximately 28-30"",
whereby the cameras overlapped each other by 56%, giving an overall
view of high resolution and short-range side-to-side detail. The
lenses in the K-38 were modified with better lenses, but that was
the only operational change made to them. Resolution of these
cameras was about 70 or so lines per millimetre. Compared to the
commercially-sold Argus C-3 35 mm cameras that was popular at that
time, which had very good resolution, the C-3 would have probably
had from 50-60 lines of resolution. |
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| Also in the RB-57D
Basic was a VF-11 viewfinder in the nose that the pilot could use to
check aircraft drift and to perform tracking for the intervalometer
systems that would help the pilot figure out which trip settings the
intervalometer should put out to the K-38 Split Verts and the KC-1B
Oblique. Because the aircraft flew so high, moisture was a problem
with the viewfinder. This was overcome by using a desiccators, which
was nothing more than a clear plastic round container about 2" in
diameter and about 9" long. This unit was filled periodically with
blue desiccant granules and connected to the viewfinder so that the
internal moist air could be pumped out of the viewfinder, through the
desiccators, where the moisture was captured by the blue desiccant,
and sent back into the viewfinder optical path. Therefore, no
moisture was a problem. The dessicator would be checked after every
flight to see if the desiccant was still blue. If any of it, however
small in size, had turned pink, the dessicator was removed to the shop
and the desiccant was taken out, new desiccant was installed, and the
unit put back on the airplane. Generally, it would last from 3-4
flights on the same desiccant. One of the guys got the idea to take
the used desiccant home and heat it in his wife's oven to dry it out
and reuse it again. Worked quite well. |
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By September 1956 the 4025th SRS with the
RB-57D-0 was being
deployed overseas to Yokota AFB Japan as Flt A Det 1, 3rd Air Division
under Operation Sea Lion and they also deployed to Eielson AFB, Alaska.
Missions
flown from Eielson were ELINT / SIGINT near / over the Soviet and Chinese borders
( Kamchatka Peninsula) and sea ports gathering information on Naval
operations. Missions include Sky Shield, Toy Soldier and Green Hornet
which were classified surveillance programs, which later would be
performed by the U-2's of the 4028th SRS.
On Dec 11,
1956 a mission with 6 RB-57D's was flown over and around Vladivostok
(USSR) early in the morning from Yokota AB with three aircraft
as the prime mission flown by William Shuman, Bob T Chalmers and
Keith Simms. and
three as spare's.
The Russians
weren't all pleased with this intrusion into their airspace.
I have heard said that as the RB-57D
was flying east to west towards Japan high in the upper jet stream if
power was reduced the plane would actually hover or flybackwards!!!! because the
jet stream was that strong.
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FLIGHT
A
DET 1
3rd Air Division Yokota AB
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R
PUGH |
| Notes from a RB-57D Pilot , I wish I could be
more specific but too many years have gone by! I do not remember the jet
stream speed , but I know that they have recorded speeds in the 300 kt.
range in that area around Japan. I was probably briefed on the jet stream,
but I sure do not recall specific's. I was at 35,000 ft. plus or minus a
little and approached the East coast of Honshu heading in a westerly
direction and as I approached the coastline, I throttled back and when the
coastline was centred in the drift sight, I throttled back and "hovered"
on the coastline. As I throttled back some more, the aircraft backed away
from the coastline. I continued to "play" with the coastline for several
minutes. I wish I could recall the indicated airspeed, but I cannot. I am
sure it was below 100 kias. |
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RB-57D-2 |
| The next
model, the RB-57D-2, tail numbers 53-3964, through 53-3969 were all
in-flight refuelable
(Martin Model 796) and carried a
crew of two and they were equipped with ferret electronic
countermeasures equipment instead of camera's and like the Model 744
they to had in-flight- refuelling capability. The RB-57D-2 featured an
AN/APA-69A radar set with an antenna housed inside a belly radome. The RB-57D-2 could often be
externally distinguished by the presence of radomes at the wing tip.(
Picture required of these) The RB-57D-2
passive ECM birds used three different camera systems, all which were
non-optical recon types. One was an O-20 Radarscope Recording Camera
which, later in the program, used an LD-45 magazine. It originally
used the O-20 magazine which was very unreliable, leaked light, and
was a bear to load and unload in a darkroom. The LD-45 was just the
opposite, and a very good unit. This was a 35mm film of 100' capacity
and Tri-X film speed, about 320 or so. It was mounted at the top of
the search radar system and viewed the radar screen through a dichroic
mirror ( the image would be seen by both the camera and the pilot)
and would trip using a signal from either the radar's sector scan or
PPI scan. It was used mainly to prove that the pilot was at the right
place at the right time. This was in the front cockpit with the
pilot. The camera had only an on-off switch that allowed power to be
passed to the camera and magazine and provide a 28 VDC trip rate that
was signalled by the radar system.
In the rear cockpit
was the navigator/observer who had many radar and ECM systems to
control. Mostly ECM. One unit, called a KD-2, used a simple
36-exposure 35 mm Tri-X film cassette that was the exact same as the
ones used commercially. It operated from one of the ECM units. The
next camera was an ECM system itself which used an APD-4 film magazine
that carried a 35mm x 400' supply of Tri-X film which was used in the
magazine. This camera was not a camera as such, just a lens that
projected the image onto the film which was "wiped on"; it was
maintained by ECM. The KD-2 and O-20/LD-45
systems were also pretty reliable, but the O-20 magazine was lousy.
To the rear of these
K-38 cameras and pointing port and starboard obliquely at about 55
degrees or so were two KC-1B 9"x 9" format 6" focal length
precision mapping cameras. Even though only a focal length
one-quarter of the K-38, the KC-1B had almost the same resolution as
these modified K-38 cameras. With a full swath of photography in
this matrix, a horizon-to-horizon and high-detailed vertical matrix
of photography was accomplished with very high resolution overall.
The D-Basic flew from between 64,000 feet to 68,000 feet, extremely
high for that time. This, of course, depended on many factors, e.g.
the aircraft itself, fuel load, and even the pilot's weight.
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RB-57D-1 |
| The third model, of which only one
was built, was the RB-57D-1, tail number 53-3963 and was also air
refuelable. The third and last version was
known as RB-57D-1. It was a single-seater that was equipped with the
AN/APQ-56 high-resolution side-looking radar for all-weather radar
mapping reconnaissance. There was a nose radome with an antenna for an
AN/APN-107(XY-1) antenna, and there was another radome in an extended
tail cone. Lengthy sausage-like radomes were faired into the centre of
the fuselage underneath the wing roots. Only one was built and very
little is known about its use other than it's involvement with
Operation Bordertown in Europe.
The
RB-57D's involvement with Crowflight came to an end in 1959 and when the aircraft
returned from Operation Bordertown, which was carried out in Europe, they were
retired ( due to wing
fatigue) and the 4025th SRS was deactivated.
Operation
Bordertown was an ELINT / SIGINT / Sampling surveillance operation of
Eastern Germany and the USSR and were flown from the
RAF BRIZE NORTON Four RB-57D-2's and the only RB-57D-1 of Detachment
7 of the 4025th SRS were known to be involved in these missions. Very
little is actually known about these Bordertown Operations
TURKEY MISSIONS |
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OPERATION " BORDERTOWN" 4025th SRS Det 7 |
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| HARD LANDINGS |
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| In late
summer of 1958, Major Robert Schueler, an RB-57D Basic pilot that would
become a U-2 pilot, took off in 973 from Laughlin AFB. A few
minutes later, every emergency vehicle go went roaring out the
side of the runway, which they did anytime an in-flight emergency
was given.
Out there in the
distance, a few miles from the runway, was an RB-57D heading around
to finals. It had to be 973 because it was the only -57D in the air at
the time. One of the problems was that no fuel had been burned
off as is done during most emergency landings. This meant that,
besides the original problem, he was very heavy and was bringing 973 to a landing in a
way that was NEVER EVER done if possible. Those honeycombed wings,
although they were very strong, were also extremely fragile,
especially at the engine roots in the wing. |
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Here he came, very good landing, and
then he touched down. Then it all came unglued!!. |
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As soon as the wheels hit the
runway. the wing on the starboard side snapped off and went
tearing down the runway by itself. The port wing stayed
attached, caught the ground, and, although the bird didn't
ground-loop, it went off through hell and glory in the dirt and
came to a sudden stop. Then we saw the canopy eject, and
we just knew that Shuler had forgotten he was on the ground,
that this was not a "zero-eject" bird, (No such thing in those
days) but he just jumped out of the cockpit and ran like hell
away from the bird. The emergency crews doused the bird
with foam and ended up getting it and the debris off the runway.
973 ended it's life as a fire-team
training exercise bird at the south end of the runway. |
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This section has been
modified with more detailed information that was received
18/02/2007 from Glenn Chapman
Author, "Me
and U-2: My Affair With Dragon Lady." Thanks Glenn
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OPERATION HARDTACK |
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Between March and
August 1958 the RB-57D's flew air sampling flights from the Marshall
Islands, Eniwetok Proving Ground in conjunction with the USA Nuclear
testing program (Code name Hardtack). Six aircraft were involved in this deployment.
The aircraft that were deployed are listed in the table below.
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RB-57D 53-3979 "CLOUD
CHASER" In action |
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Washing down the sampling pods after a mission |
RB-57D 53-3979 "CLOUD
CHASER"
Crew names
required. |
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