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Military Slide Rules

Some of these slide rule images are duplicated on their respective manufacturer or country pages.


USAF Test Pilot School

Edwards AFB
slide rule on crest

Test Pilot Student and Instructor
at TPS School, Edwards AFB
c1952-1954

Test Pilot calculating flight profile
at TPS School, Edwards AFB
c1956

Alex E. S. Green Slide Rules


Designed by necessity and implemented during WWII for B-29 Crews.


REF Green Ship Length Computer
Green Ship Length Computer
Made in USA by Alex. E.S. Green during WWII
For determining the size of Japanese ships, used in conjunction with the B-29 Gun sights. This slide rule was used to find the elusive Japanese battleship Yamato



REF Green Flight Engineers Computer
Green Flight Engineers Computer
Made in USA by Alex. E.S. Green during WWII.
For maximizing the fuel range of B-29 Gun during long over-water missions. Created after the B-29 crew that found the Japanese fleet ran out of gas and had to land in Xian, China


Government Issued Slide Rules



ISRM K&E Short Base Triangulation Rule USArmy


Initials: USBR
K&E Short Base Triangulation Rule US Army
Made in U.S.A. for the US Army - 20" long
Front Scale: Aux Angle "A", Mils [ Vertex Angle "t" mils, base "b" ] Range "R"
Back Scale: [ Vertex Angle "t" mils, base "b" ]
Cursor: 2 hairlines Meters/Yards


REF K&E M4 Graphical Firing Table Slide Rule - 1943
K&E M4 Graphical Firing Table
Made in U.S.A. for the US Army, 1943 - 18-1/4" long
Link - Clark McCoy Archive


ISRM Geo. W. Richardson Ballistic Slide Rule Model of 1917


Geo. W. Richardson Ballistic Slide Rule Model of 1917
Made in USA by Geo. W. Richardson for J. H. Weil & Co.
Front Scale: A (Yards or Meters) [ B (Mils) C ] D (Yards or Meters)
Back Scale: [ B (Mils) C ]
Note: This was not designed for a sliding cursor


C01 USSR Artillery Ranging
USSR Soviet Artillery Ranging
Made in USSR
Front Scale
tg, tg, 10K [Sin1-00, Sin0-10, 10K] Tables

Archive Photo - No longer in collection


REF Japanese Gunnery Correction Slide Rule
Japanese Gunnery Correction Slide Rule
Made in Japan - 1936 pre WWII
Front Scale
tg, tg, 10K [Sin1-00, Sin0-10, 10K] Tables

Archive - Image from Duke University, Gessler Collection
A combination slide-rule/nomograph forcalculating ballistics corrections for temperature, barometric pressure, vertical and horizontal wind and muzzle velocities. Probably used in land-based Army operations in China. Weighing 16 pounds it measures 30x38x2.5 cm. It has a thick wooden base, thick bronze or copper dovetail slides (with matching serial numbers 26), and white brass faceplates. Three sliding scales are side-by-side, with a fourth sliding scale inserted in the center slide.


REF Military Attack Computer
Military Attack Computer
Made in USA
Front Scale
Air Speed, Lead angle, Time, Distance, etc.
Archive - Not in collection


ISRM U.S. Military 76mm Howitzer Artillery Set
U.S. Military 76mm Howitzer Artillery 2 SR set
Made in USA - 1952
Scales: Range, Elevation, Drift, etc


ISRM Air Force Type MB-2A Air Navigation Computer
Air Force Type MB-2A Air Navigation Computer
Made in USA by JB Carroll Co. Chicago, c1949-1956
4.25 inch Diameter, Patent USA 2,528,518 (1950) and 2,767,919 (1956)
Front Scale
Cal. Air Speed, True Air Speed, Temp Rise, Mach Number (Pressure Altitude, Indicated Air Temp )
Back Scale
Course, Reative Wind ( wind , Corrected alt, Minutes, Hours, Wind, Drift, altitude )
Original Owner Stationed at Souix City Air Base, Iowa. Donated by Jason McHenry, Tucson, Arizona
5.91MB PDF
Includes insert on atomic bomb survival.


S217 Soviet-LFAI Aviation Navigator's
Soviet Aviation Navigator's
Made in USSR
Scales: The Corrected height, Height and speed on the device, Distance, Radiuses of a turn - distances - heights


S531 Soviet-LFAI Aviation Navigator's
Soviet-LFAI Aviation Navigator's
Made in USSR
Scales: The Corrected height, Height and speed on the device, Distance, Radiuses of a turn - distances - heights


S552 Soviet-LFAI Artillery
Soviet-LFAI Artillery
Made in USSR
Front Scale:
1:50000M, 1:25000M // β, N² [Sin, S&T, Tg, N ] NQ+1, L
Back Scale: [ Sin, S&T, Tg, N ]
Back: Position and spotter formulae
Multiple hairlined Cursor


ISRM LFAI Soviet Military Dual Circular
Soviet Military Dual Circular - 1957
Made in USSR by LFAI, Leningrad
Left Scale: 10000 meter (Sin)
Right Scale: 10000 meter (Tg)
Back: Position and spotter formulae
Actual application unknown at this time


S495 Lawrence 505_U.S. Navy
Lawrence 505_U.S. Navy
Made in USA - Peru, Ind. (Lawrence)
Painted wood body
Front Scale
A [ B, CI, C ] D, K
Back Slider
[ S, L, T ] Back: Conversion Chart


S189 American Blueprint Military Rule
American Blueprint Military Rule
Made in USA - by K&E for American Blueprint (Military contractor)
Front Scale
Opposite Angle Deg, Mils [Apex Angle Mils, Deg, CI,C] D,A
Back slider: [Tan, Sin-Tan, Tan ]
Back: Geometry formulae
TM 6-240 Manual 3.35MB Pdf
Field Artillery Military Slide Rule


ISRM Pickett Model 14 US Military
Pickett Model 14 US Military
Made in USA
Front Scale
LL1+/-, LL2+/-, A [ B, T, ST, S, K,  C ] D, LL3+/-, LL4+/-
Back Scale
Opposite angle Degrees, Mils [ Apex angle, Tan, Sin-Tan, Sin, Base C ], Distance D, A


ISRM Union Instruments MIL-C-4318-B Type A-1
Union Instruments MIL-C-4318-B Type A-1
Made in USA by Pickett
Front Scale
L, A, DF [ CF, CIF, T, S, C ] D, DI, K
Back scale
Ground Size Meters, Feet, Ground Speed, [Image size, Cycling Time, Focal Length ] Altitude
USAF Manual 8.69Mb


P232 Pickett N700-T USAF Aerial Photo Type A-2
Pickett N700-T USAF Aerial Photo Type A-2
Made in USA for the USAF
Front Scale
L, A DF [ CF, CI, T, S, C ] D, DI, K
Back Scale
Ground Size Meters, Feet, Ground Speed, [Image size, Cycling Time, Focal Length] Altitude
USAF Manual 8.69Mb


ISRM USAF Type A-1 Aerial Photo
USAF Type A-1 Aerial Photo - c1950
Made in USA for Astrodyne by Precision Scale Co. (founded by Art Eckel)
Front Scale
L, A, DF [ CF, CIF, T, S, C ] D, DI, K
Back scale
Ground Size, Ground Speed, [Image size, Cycling Time, Focal Length ] Altitude
USAF Manual 8.69Mb

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