PROVISION FOR VARIABLE RANGE AND RANGE AND VARIABLE TIME DELAY ON 4 INCH ROCKET.

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78-03624A000900010018-2
• Release Decision: RIPPUB
• Original Classification: C
• Document Page Count: 4
• Document Creation Date: December 23, 2016
• Document Release Date: August 6, 2013
• Sequence Number: 18
• Publication Date: July 13, 1954
• Content Type: REPORT

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Declassified in Part - Sanitized Copy Approved for Release 2013/08/07: CIA-RDP78-03624A000900010018-2
DATE
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SUB T ECT
13 July 1954
DOC /7 REV DATE a/
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Jun NEXT REY 41 WIN: RR 10-2
Provision for Variable Range and. Variable Time Delay on
4 Inch Rocket.
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A series of discussions among the group working on this roc-
ket have lead to certain conclusions regarding feasibility
of different designs for this design. These designs fall
into three categories which can be classified as follows)
1. Five different complete motors.
2. One complete assembled motor from which increments can
be removed to obtain different ranges.
3. A single motor into which incremental powder charges
would be assembled by the field operator.
Each of these has distinct advantages and disadvantages which
are listed below under each device.
1. Five different motor tubes.
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The advantages of this design are: EXT EYND 6 VE3 EY
REASON
1. Field operation is greatly simplified.
2. A single elevation is required for the launching
device.
3. The operator has no adjustments or assembly opera-
tions involved.
4. This design is believed to produce the highest d
gree of accuracy.
5. The development task would be the cheapest of the
designs considered.
6. The development can take place in steps which should
result in our ability to supply a finished item for one
of the ranges for operational test in a very short per-
iod of time.
7. The materials left over from a single firing are
usable for another firing with another warhead.
CONFIDENTIAL
Declassified in Part - Sanitized Copy Approved for Release 2013/08/07 : CIA-RDP78-03624A000900010018-2
Declassified in Part - Sanitized Copy Approved for Release 2013/08/07: CIA-RDP78-03624A000900010018-2
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CON DENT! L
WW1= Provision for Variable Range and Variable Time Delay on
4 Inch Rocket (Continued)
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8. This design corresponds to a production item which
would be completely assembled and ready for use so that
the chances for malfunctioning are greatly reduced.
The disadvantages of this design are:
1. Five different time delays are required for the
five different motors.
2. The bulk of unused material is greater than for
the multiple increment varieties.
2. One motor with increments to be removed for five different
ranges.
The advantages of this design are as follows:
1. Less bulk is left over for certain ranges.
2. We would be preparing only one finished device.
The disadvantages of this design are as follows:
1. This would require the development or adaption of a
quick disconnect pressure sealing fitting.
2. If the device is designed for a single time delay,
it would require variable elevation settings for launch-
ing.
3. The materials left over from single firing are not
usable for subsequent firings.
4. The item is much more complicated to manufacture.
5. This device would be a complicated development job
and partial completion of the development would not
result in a usable device.
Declassified in Part - Sanitized Copy Approved for Release 2013/08/07: CIA-RDP78-03624A000900010018-2
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Declassified in Part - Sanitized Copy Approved for Release 2013/08/07: CIA-RDP78-03624A000900010018-2 50X1
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13 July 1954
CONHDENTIAL
SUBJECT Provision for Variable Range and Variable Time Delay on
4 Inch Rocket (Continued)
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6. There would be the possibility of failure of igni-
tion of one or more of the incremental motors which
could result in great inaccuracy.
3. Single motor to be assembled by operator.
Advantages:
1. Requires only one motor tube.
2. Less bulk to carry than design #1.
3. Less expensive than design #2.
4. Only one delay required if five elevations are used
for launching.
5. Development can take place in steps.
6. If a development is incomplete, a usable device can
be obtained.
The disadvantages of this design follow:
1; It requires five separate nozzle plates.
2. The operator would be required to handle exposed
powder.
3. It would require either five delays or a variable
elevation for launching or a variable delay requiring a
fuse setter.
4. Due to field assembly there is a greater chance of
malfunctioning.
The primary differences between designs #1 and #3 is that #1
would be assembled during manufacture and #3 would be field
assembled by the operator.
Coring'
1\Declassified in Part - Sanitized Copy Approved for Release 2013/08/07: CIA-RDP78-03624A000900010018-2 A
Declassified in Part - Sanitized Copy Approved for Release 2013/08/07: CIA-RDP78-03624A000900010018-2
DATE
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13 July 1954
SUBJECT Provision for Variable Range and. Variable Time Delay on
4 Inch Rocket (Continued)
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Page, 4
The relative advantages and. disadvantages of these three
designs should be carefully evaluated in respect to the
desired use and operation of this device and a decision to
buide us should be reached so that no appreciable delay would
result from our working on one of the designs which would
not meet the service requirements of the' device.
IT! A.1
Declassified in Part - Sanitized Copy Approved for Release 2013/08/07: CIA-RDP78-03624A000900010018-2