DESCRIPTION OF MODEL HR-72 CAMERA SYSTEM

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP74B00752R000100210001-2
• Release Decision: RIFPUB
• Original Classification: C
• Document Page Count: 10
• Document Creation Date: December 22, 2016
• Document Release Date: December 13, 2010
• Sequence Number: 1
• Publication Date: February 1, 1957
• Content Type: REPORT

Approved For Release 2010/12/13: CIA-RDP74B00752R000100210001-2
UUNFIDLNTIAL
CM 2096
Report No.
HBR 3077
1 February 1957
INSTRUMENT DIVISION
This publication, produced by I}ycon Mfg. Company, consists
of cover and 10 leaves. From the original printing of 27 copies
(and one reproducible) this document is copy F-
Description
of
MODEL HR-72
CAMERA SYSTEM
Developed Under Contract No. AF-33 (600) 33725
CONFIDENTIAL
Approved For Release 2010/12/13: CIA-RDP74B00752R000100210001-2
 Approved For Release 2010/12/13: CIA-RDP74B00752R000100210001-2
CONFIDENTIAL
TABLE OF CONTENTS
Section 1
HYCON'S LATEST ADVANCE IN
AERIAL RECONNAISSANCE
Paragraph Page
1. General . . . . . . . . . . . . . . . . . . . . 1
2. Significant Advances . . . . . . . . . . . . . . . . 1
Section 2
DESCRIPTION
1. General . . . . . . . . . . . . . . . . . . . 1
2. Major Components . . . . . . . . . . . . . . . . 1
a. Model 7312 Mount Assembly . . . . . . . . . . . . 1
b. HR-732 Camera . . . . . . . . . . . . . . . . . 4
(1) Model HL-732 Lens . . . . . . . . . . . . . . 4
(2) Model HS-731 Shutter . . . . . . . . . . . . . 4
(3) Model HM-732 Magazine . . . . . . . . . . . . 4
c. Model 7313 Programmer . . . . . . . . . . . . . . 4
d. Junction Box . . . . . . . . . . . . . . . . . . 4
e. Remote Controls and Indicators . . . . . . . . . . . . 4
f. Data Correlation . . . . . . . . . . . . . . . . 4
3. Leading Particulars . . . . . . . . . . . . . . . . 7
4. Additional Features . . . . . . . . . . . . . . . . 7
LIST OF ILLUSTRATIONS
Figure Page
1. Model HR-72 Camera System . . . . . . . . . . . . . 2
2. Model 7312 Mount Assembly . . . . . . . . . . . . . 3
3. Model HR-732 Camera . . . . . . . . . . . . . . . 5
4. Model HM-732 Magazine . . . . . . . . . . . . . . 6
5. Model HS-731 Shutter . . . . . . . . . . . . . . .
CONFIDENTIAL
Approved For Release 2010/12/13: CIA-RDP74B00752R000100210001-2
 Approved For Release 2010/12/13: CIA-RDP74B00752R000100210001-2
CONFIDENTIAL
Section 1
HYCON'S LATEST ADVANCE IN
AERIAL RECONNAISSANCE
1. GENERAL
Recent successful developments by Hycon in aerial
photographic equipment have assured new horizons in
aerial reconnaissance. The most up-to-date advances in
the photographic field are incorporated in the Model
HR-72 Camera System. Its principal design parameter
has been maximum intelligence-gathering capability.
The equipment features high image quality, maximum
film capacity, minimum weight, and high reliability. The
equipment is designed for quick installation and removal
of the system. This allows for the multiple use of the RF
aircraft depending on the mission of the moment. Equally
important, it permits maintenance and service of the
sub-system to be independent of any maintenance work
on the aircraft, the utilization of which is thereby ma-
terially increased.
2. SIGNIFICANT ADVANCES
The following significant advances are incorporated:
Aspheric lens elements for lightweight and high
resolution.
Contoured platen for uniformly high resolution.
Greater film capacity for increased flight-line
miles.
Simplified integral control system.
Unusually favorable camera weight-to-payload
ratio.
Lightweight, sturdy IMC mount.
Section 2
DESCRIPTION
1. GENERAL
The Hycon Model HR-72 Camera System, shown in
figure 1, is an automatic, 24-inch focal length, nine-inch
by eighteen-inch format, reconnaissance system consist-
ing of three HR-732 cameras in a tri-camera mount. The
three cameras are mounted in tandem, and include a
right and left oblique and a prime vertical. Total trans-
verse angular coverage of 115 degrees is provided. The
unit has a completely self-contained control system and
only requires connection to the aircraft 28-volt supply
and vacuum source. The design of this equipment is such
that it meets the environmental and operational require-
ments encountered in modern aircraft. Adequate circuitry
protection has been provided to prevent damage to the
system due to overloads.
2. MAJOR COMPONENTS
The HR-72 Camera System consists of the following
separable components: a Model 7312 Mount Assembly,
three HR-732 cameras, and a Model 7313 Programmer.
A transportation carriage and a shipping container are
provided. Mated ground support equipment is also avail-
able.
a. Model 7312 Mount Assembly. The mount as-
sembly shown in figure 2 is made up of the following
major components: a cradle assembly, mounting plates,
an IMC drive assembly and mounting bracket, hinged
mounting brackets, and four cradle hoist fittings.
The Model 7312 Mount Assembly is designed to
cradle and hold three Model HR-732 cameras. The
cameras are secured in a fixed position within the mount
assembly cradles in such a manner that the forward unit
is at a right oblique angle, the aft unit is at a left oblique
angle, and the center unit is mounted vertically along
the centerline of the aircraft. Mounting plates, which
must be attached to the cameras prior to installation, are
a part of the mount assembly and are used when se-
curing the cameras to the sides of the cradles. The mount
assembly is attached to the aircraft by means of three
CONFIDENTIAL
Approved For Release 2010/12/13: CIA-RDP74B00752R000100210001-2
 Approved For Release 2010/12/13: CIA-RDP74B00752R000100210001-2
CONFIDENTIAL
Figure 1. Model HR-72 Camera System
CONFIDENTIAL
Approved For Release 2010/12/13: CIA-RDP74B00752R000100210001-2
 U
H
E
Approved For Release 2010/12/13: CIA-RDP74B00752R000100210001-2
CONFIDENTIAL
1. Mounting Plate
2. Cradle Assembly
3. Cradle Hoist
Fitting
4. Hinge Mounting
Bracket
5. IMC Drive
Assembly
6. IMC Mounting
Bracket
Figure 2. Model 7312 Mount Assembly
CONFIDENTIAL
Approved For Release 2010/12/13: CIA-RDP74B00752R000100210001-2
 Approved For Release 2010/12/13: CIA-RDP74B00752R000100210001-2
CUNTIUEN hIAL
mounting brackets. Two of the brackets are fastened
together in such a manner as to form a hinge-type pivot-
ing joint between the mount assembly and the aircraft
frame. The remaining mount bracket is located in the
center of the forward end of the mount assembly and
is secured to the actuating rod of the IMC drive by a
roll pin. When a pulse from the intervalometer starts
the IMC drive motor, a cam revolves, lowering the front
end of the mount assembly and providing IMC for all
three cameras.
The mount assembly is of box-girder, riveted-type
construction, utilizing extruded frame members and
formed panels to provide minimum weight and maximum
strength.
b. HR-732 Camera. The HR-732 Camera is a 24-
inch focal length, nine-inch by eighteen-inch format,
lightweight camera. The camera body and lens cone,
shown in figure 3, are so designed, manufactured, and
assembled as to maintain the complete assembly at
minimum allowable tolerances. The camera body and
cone are mated and machined as a single unit. The cone
and body are integrated and calibrated, thus becoming
a permanent assembly. Cone weight is held to a mini-
mum through the use of plastic side panels. A cone
extension is furnished and is used to protect the lens
during ground handling. The camera body-and-cone
assembly contains all the mechanical and electrical
components necessary for camera operation, including
a time-data recording assembly.
(1) Model HL-732 Lens. The lens is a 24-inch,
f/8, improved Pentac which utilizes aspheric elements.
This design provides extremely high performance with
a minimum number of elements. The lens in its mount
weighs seven pounds six ounces.
(2) Model HS-731 Shutter. The shutter is an
intra-lens, high-efficiency type providing effective speeds
of 1/125 second and 1/250 second with an efficiency
of 65%. Variation, in shutter speeds from these values
is less than 10% over the range of temperature and
other operating conditions to which it is normally subjec-
ted. Means are provided to fix the shutter in the open
position for purposes of focusing or calibration. In ad-
dition, means are provided for releasing shutter spring
tension.
(3) Model HM-732 Magazine. The HM-732
Magazine, shown in figure 4, is of lightweight design,
accepting a 91/2-inch by 1000 foot roll of standard-
base film, or an 1800-foot roll of thin-base film. The
magazine utilizes new lightweight aluminum spools, and
a lightweight fiberglass magazine cover. Means are pro-
vided for an automatic cutout so that an overload of
the magazine will not damage the film-drive mechanism.
A contoured platen is utilized to conform to the surface
of best imagery. The maximum depth of contour is
0.1127 inch. An automatic vacuum system is provided
to hold the film firmly against the platen during ex-
posure.
c. Model 7313 Programmer. The Programmer is
an automatic, electro mechanical unit which provides
starting pulses or electrical power, as required, for
proper sequencing in the operation of the entire con-
figuration.
d. Junction Box. The Junction Box contains the
circuit breakers for the entire system, an Agastat relay,
a fuse block, and the necessary terminal strips. All elec-
trical signals to and from the various components are
routed through the Junction Box. The Agastat relay con-
tacts are connected to an indicator light. When the
Agastat coil is energized by the shutter circuitry, the
indicator light will show that both shutters and film
drives are working correctly.
e. Remote Controls and Indicators.
1. Off-Standby-Run Switch.
2. Operation Indicator Light.
f. Data Correlation. A readily removable data
chamber optically records on film the exposure number,
time of exposure, mission number, and date.
CONFIDENTIAL
Approved For Release 2010/12/13: CIA-RDP74B00752R000100210001-2
 ri
L
Approved For Release 2010/12/13: CIA-RDP74B00752R000100210001-2
CONFIDENTIAL
Figure 3. Camera Body and Lens Cone
CONFIDENTIAL
Approved For Release 2010/12/13: CIA-RDP74B00752R000100210001-2
 Approved For Release 2010/12/13: CIA-RDP74B00752R000100210001-2
CONFIDENTIAL
CONFIDENTIAL
Approved For Release 2010/12/13: CIA-RDP74B00752R000100210001-2
 Approved For Release 2010/12/13: CIA-RDP74B00752R000100210001-2
GUNHULNIIAL
3. LEADING PARTICULARS
1.
Shutter Speeds
Available.
a. In-Flight System
(Effective exposure
Resolution. . . .
33 lines/mm
time) . . . . .
b. Over-all Dimensions,
m. Aperture Stops .
HR-72 Configuration.
n.
HR-732 Camera
Length . . . .
53.60 inches
Positions (Triple
Width . . . .
36.25 inches
Mount).
Height . . . .
42.25 inches
Number of right
oblique positions
c. Over-all Dimensions,
Number of vertical
HR-732 Camera.
positions . . . .
Length . . . .
22.375 inches
Number of left
oblique positions
Width . . . .
14.375 inches
Total angular
Height . . . .
40 inches
coverage . . .
Distance between
d. Over-all Dimensions,
Shipping and Storage
Container.
Length . . . . 70.25 inches
Width . . . . 50.75 inches
Height . . . . 64.875 inches
e. Weight, HR-72
Configuration.
Full operational
condition (normal
film load) . . . 366 pounds
f. Weight, HR-732
Camera.
Complete . . . 63 pounds
g. Component Weight.
Camera body includ-
ing lens cone and
shutter assembly . 38 pounds
Magazine . . . 25 pounds
h. Film Spool Capacity
(Each). . . . . 91/2 inches wide. Up to
1,000 feet standard-base.
Up to 1800 feet thin-base.
i. Format (HR-732
Camera). . . . 9 inches x 18 inches
j. Power Requirements
(HR-72 Configuration). 27.5 volts d-c
15 amps (average)
k. Film Velocity
(HR-732 Camera). 7.4 inches
(average)
o. IMC Drive.
Action . .
1/125, 1/250 second
f/8 to f/16
1
115 degrees
37 degrees
4 degrees 8 minutes
Mount rests in position
tilted up at forward end.
IMC lowers, forward end of
mount to level position.
IMC commences one-half
second before shutter fires.
Mount lowers in one second
and raises in one second.
IMC cam fires shutter. IMC
returns mount to rest
position.
4. ADDITIONAL FEATURES
The Hycon Model HR-72 Camera System is adaptable
to a variety of other applications. The following modifi-
cations to the basic configuration have been designed or
are contemplated, depending upon application.
a. Variable IMC to maximum rate of 0.101 radian/
b. Maximum cycling rate of 1 1/2 seconds per frame.
c. Adaptation of HS-732 shutter, a drawer-type
shutter of large aperture and high reliability now
in use in a different application. (See figure 5.)
d. Adaptation of FTL photo-head for digital record-
ing data.
CONFIDENTIAL
Approved For Release 2010/12/13: CIA-RDP74B00752R000100210001-2
 E
C
L
Approved For Release 2010/12/13: CIA-RDP74B00752R000100210001-2
CONFIDENTIAL
CONFIDENTIAL
Approved For Release 2010/12/13: CIA-RDP74B00752R000100210001-2