15cm Kanone and Bunker Model

Two recent 1/35th-scale kits from Masterpiece Models depicting guns and bunkers from the German Atlantic Wall.

Atlantic Wall Longues Battery 
CD7011: Atlantic Wall Bunker Longues Battery
1/35th scale resin and polyfoam kits of Longues Battery bunker. 15cm gun and turret included. List price: $99.95.

 

15cm Kanone Atlantic Wall 
CD7011-A: German 15cm Kanone
1/35th scale model of 15cm (150mm) gun and turret as used in the Atlantic Wall during WWII. List price:$29.95.

 

 

Masterpiece Models also produces a 1/35th-scale model of the Japanese Shinyo (“Sea Quake”) Suicide Boat described in the Japanese Suicide Boats Intelligence Report.

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B-17 “Chuckie” Moves to Military Aviation Museum

Chuckie B-17 Flying FortressThe B-17 Flying Fortress “Chuckie” is moving from the Vintage Flying Museum in Fort Worth, Texas to the Military Aviation Museum in Virginia Beach, Virginia. The B-17 “Chuckie” was used for cropdusting until 1979. Owned by Chuckie Hospers, the B-17 was purchased by Don Anklin for permanent display at the Military Aviation Museum. The museum plans on sending the aircraft to American Aero in Florida for restoration work after which the B-17 returns to the museum.

See: Rare WWII Bomber Finds New Home in Virginia Beach

 

 

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Torpedo Data Computer

Analysis of the torpedo fire control problem and photographs of submarine torpedo data computers from Torpedo Data Computer: Mark 3, Mods. 5 to 12 Inclusive, Ordnance Pamphlet No. 1056, U.S. Navy Department Bureau of Ordnance, Washington, D.C., June 1944:

Torpedo Data Computer

A submarine is equipped with torpedo tubes fwd and aft which are parallel to the longitudinal axis of the ship. When a torpedo is fired it travels in a straight line for a certain distance called the Reach. After it has reached the end of this period of straight line travel, it may be caused to start on a circular course of a definite radius. The length of the circular path is determined by the setting of the gyro in the torpedo and the characteristics of the type of torpedo being used. After travelling in the circular path for a prescribed distance, the torpedo once more assumes a straight path and travels thus until it reaches the target.

The method for controlling the torpedo is by setting the Gyro Angle. It is the function of the Computer to take all of the variable factors into account and determine the value of the Gyro Angle for both fwd and aft torpedoes. The Gyro Angle is continuously generated by the Computer to keep up with the change in the problem due to relative motion of Own Ship and Target.

Submarine Torpedo Aiming and Firing

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German Radar of WWII

From Japanese Electronics, OPNAV-16-VP101, Photographic Intelligence Report 1, Air Intelligence Group, Division of Naval Intelligence, Office of the Chief of Naval Operations, Navy Department, January 1945:

 

German Radar Summary
 

Examples of German Radar are included here to cover the possibility that the Japanese may have access to German equipment and technicians.

The Germans employ several types of land based installations covering the functions of Air Search, Fire Control, and Coast Watching.

These types are quite well standardized and are much more efficient than those the Japanese are known to have.

There is now some photographic evidence of German Radar equipment in use by the Japanese. Also, it is knowrn that many other types of German electronics equipment are being used.

The following table represents the latest list of German Radar types with salient information concerning each.

 

GERMAN LAND BASED RADAR

Name Size of Screen* Top of Screen Above Ground Frequency Range in Nautical Miles Use
LIMBER FREYA 20’x 16′
IFF – 16¼ x 3½’
26¾’
30′ with IFF
116-146 MCS. 75 A.S.
POLE FREYA 20’x 16′
IFF – 16¼ x 3½’ or 20′ x 8′
32′, 35′ or 40′ with IFF 116-146 MCS. 100 A.S.
GIRDER CHIMNEY 19½’ x 97½ 115′ 120-130 MCS. 110 A.S.
CYLINDRICAL CHIMNEY 60′ x 97½
IFF .22′ High
110½’ 120-130 MCS. 160 A.S.
GEMA COASTWATCHER 20′ x 8′ 25′ 370-390 MCS. Depends on elevation (ASL) of site C.W.
LARGE COASTWATCHER 35′ x 34′ 40′ 70-90 MCS. 60-75 C.W.
SMALL HOARDING 63¾’ x 44¾’ 50′     C.W.
LARGE HOARDING 98′ x 36½’ 50′ 120-130 MCS. 100-115 C.W.
SMALL WURZBURG 10′ Diameter 12½’ in Vertical Position 550-580 MCS. 25 F.C.
GIANT WURZBURG 24′ Diameter 27′ in Vertical Position 470-580 MCS. 40 G.C.I., A.S. & C.W.

* – Width (Horizontal Dimension) Given First
A.S. – Air Search
F.C. – A/A Fire Control
C.W. – Coast Watching
G.C.I. – Ground Control Intercept
 

Drawings of all of the basic German Radar types are included on this page. Best known popular names are used for the designation of each type. It will be noted that these designs are quite well standardized for each particular use, and identification is easier because of this fact.

In most cases, this German equipment is superior to that now in use by the Japanese. A constant watch for German type designs of Radar in Japanese held territory is therefore in order.

German Radar of WW2

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M36 Tank Destroyer Armament

Summary of the armament of the M36 “Jackson” tank destroyer from the M36B1 technical manual TM 9-748: 90-mm Gun Motor Carriage M36B1, War Department Technical Manual, U.S. War Department, Washington D.C., January, 1945.

ARMAMENT CHARACTERISTICS

a. The armament on the 90-mm Gun Motor Carriage M36B1 is employed chiefly against enemy tanks and other ground objectives. The 90-mm Gun M3 is mounted in the turret. The turret can be traversed 360 degrees manually or by a hydraulic traversing mechanism. The 90-mm gun can be elevated 30 degrees and depressed 10 degrees.

M36 B1 Gun Motor Carriage

90-mm Gun Motor Carriage M36B1 – Three-quarter Right Front View

b. The cal. .30 machine gun in the front of the gun motor carriage on the right side is elevated and depressed manually, and fired by a conventional trigger. Refer to FM 23-50 for complete information on its operation.

M36 Jackson Tank Destroyer

90-mm Gun Motor Carriage M36B1 – Three-quarter Right Rear View

c. The cal. .50 machine gun is employed chiefly against enemy aircraft and is elevated and traversed manually, and fired by a conventional trigger. The machine gun can be traversed independently of the turret. Refer to FM 23-65 for the complete information on its operation.

Turret .50 Caliber Machine Gun

Cal. .50, HB, Machine Gun – Stowage Position

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Tactical and Technical Trends #34

The U.S. intelligence articles from Tactical and Technical Trends, No. 34, September 1943 have been added to the main Lone Sentry website:

The Me-410 Aircraft  ◊  Protection Against Japanese Aerial Bombing  ◊  General von Arnim’s Orders for Ground Deployment  ◊  Italian L Type Grenade  ◊  German Conversion of French 75s into Antitank Guns  ◊  Japanese 70-mm Howitzer Model 92  ◊  Notes on German Artillery Tactics in Tunisia  ◊  Russian Artillery Support in Tank Attacks  ◊  Notes of a British Armored Force Officer on German Tank Employment  ◊  Detailed Report on the German “Tiger” PzKw 6  ◊  Italian Portable Flame Thrower, Model 41  ◊  German Compass Card  ◊  German Butterfly Bomb  ◊  Notes on the German Infantry Division  ◊  Notes on Mobile Surgical Units in the Middle East  ◊  Axis Use of Skoda AA/AT Gun  ◊  Testing Antiaircraft Gun Barrels in Combat Areas  ◊  Japanese 12.7-mm (Fixed Mount) Aircraft Machine Gun  ◊  German Recognition Signals  ◊  Drinking Water from the Rattan Vine  ◊  Lessons from the New Zealand Division Operations in Cyrenaica 

 

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WAAC Officer Qualifications

The following officer qualifications are taken from a WWII recruiting pamphlet for the Women’s Army Auxiliary Corps (WAAC):

A candidate for [Women’s Army Auxiliary Corps] Officers’ Training School must:

(a) Be a woman citizen of the United States.

(b) Be between her 21st and 45th birthdays.

(c) Have an excellent character.

(d) Furnish proof of graduation from high school or its educational equivalent.

(e) Pass an intelligence test. The standard will be comparable to that required for an officer of the Army of the United States.

(f) Submit satisfactory proof of birth date and citizenship.

(g) Qualify according to the height and weight chart listed on page three.

(h) Be physically fit. Fill out and have signed by a licensed physician the health form attached to the cover of this information folder. Candidates will be examined finally by Army doctors.

Physical and mental qualifications: Applicants for the Women’s Army Auxiliary Corps are not acceptable who have major defects of vision; other than slight defects of hearing; chronic discharge from the ear or ears; abnormal conditions of the thyroid or other ductless glands; organic disease of the cardiovascular, gastrointestinal, or genitourinary systems; tuberculosis; syphilis or other infectious disease; allergic conditions; epilepsy; mental or nervous disease; and disabling defects of the extremities. In general, an applicant must be in good health; able to see well and have good hearing; her heart must be competent to stand the stress of physical exertion; she must be intelligent enough to understand and execute orders and protect herself; and she must be able to transport herself by marching as the exigencies of the military service may demand.

Decision as to acceptance with respect to physical qualification will be determined following final examination made by Army examiners.

The following table is the average weight for age and height for applicants for admission to the Women’s Army Auxiliary Corps:

 

 

Height Weight According to Age Period
inches  21-25   26-30   31-35   36-40   41-45 
  60   114   117   120   123   126
  61   117   120   123   126   129
  62   120   123   126   129   132
  63   123   126   129   132   135
  64   127   130   133   136   139
  65   131   134   137   140   143
  66   135   138   141   144   147
  67   139   142   145   148   151
  68   143   146   149   152   155
  69   147   150   153   156   159
  70   151   154   157   160   163
  71   155   158   161   164   167
  72   159   162   165   168   171

 NOTE: Height and weight to be taken without shoes and with surgical gown or sheet in lieu of dress. Minimum standard for height is 5 feet, maximum 6 feet; minimum of weight is 105 pounds.

The permissible variation below the standard for age is 15 pounds, with the exception that no applicant will be accepted whose weight is less than 105 pounds. In the interest of physical efficiency, the weight should not be more than 16 2/3 percent above the average. In applying the percentage variation, fractions of less than 1/2 pound will be dropped; those of 1/2 pound or more will be counted as an additional pound.

The Recruiting and Selection Boards will take into consideration the applicant’s:

(a) Leadership.

(b) Moral character.

(c) Personality.

(d) Appearance.

(c) Tact.

(f) Bearing.

(g) Past experience.

(h) General adaptability.

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Four Wheels to Survival

“4 Wheels to Survival: Your Car and Civil Defense” is a U.S. pamphlet produced by the Civil Defense during the Cold War in 1955.

 

4 Wheels to Survival
YOUR CAR AND CIVIL DEFENSE
 

Your car can be “four wheels to survival” for you and your family in a civil defense emergency. How well your car serves this purpose depends on a few commonsense advance preparations—things which may spell the difference between life and death for you and your family.

4 Wheels to Survival - Civil Defense Pamphlet

Your car helps you move away from danger

Many civil defense actions, especially pre-attack evacuation, depend on your ability to move away from a probable area of danger. Properly used, your car can move you and as many others as can be comfortably seated many times as far as the strongest of you could go on foot. To do this:

 

 

Car 
 
Keep your car in the best possible mechanical condition. 

 

 

Car 
 
Keep your tires properly inflated. 

 

 

Car 
 
Be sure the battery is always in tip-top shape. 

 

 

Car 
 
Keep your gas tank more than half-full at all times. 

 

 

Most cars today can move some 250 miles on a full tank of gasoline. You may not need to move that far at any one time under emergency conditions, but it may be difficult to obtain additional gasoline for quite a while after an attack. 

Ways to conserve gasoline:

• Keep your engine in proper mechanical adjustment.

• Take opportunities to coast long distances with engine off.

• Learn the most efficient operating speed of your engine. Usually between 30 and 40 miles per hour.

• Remember—you can push or pull another car with little increase in your own gasoline consumption.

 

Your car helps shelter you

 

Your Car Helps Shelter YouTests under an actual atomic explosion in Nevada proved that modern cars, especially those with turret top construction, give a degree of protection against blast, heat, and radiation.

Before an attack, roll the windows down to equalize pressures and to prevent glass breakage. Crouch or lie down, below the level of the windows. After an attack, windows should be raised to keep out as much dust as possible; it may be contaminated by radio-active fallout.

Shelter in an unexpected blast is a bonus you get from your car. More importantly, the car provides a small movable house. You can get away in it—then live, eat, and sleep in it in almost any climatic conditions, if necessary, until a civil defense emergency is ended.

 

Your car is your information center

 

Car Information CenterUnder the CONELRAD system of emergency radio broadcasting, your car radio will be your source of official information. Be sure it is working and marked with the civil defense frequencies of 640 and 1240.

Have good maps of your city and the surrounding areas. In an evacuation, maps will be important, since it may be necessary for the official traffic broadcasts to route you over roads you do not know.

 

Your car can be your shopping center

 

Car Shopping CenterIn an emergency you may not be able to buy food for several days. Have an adequate supply on hand to make your family self-sufficient. The food you’ll need can be based on the 7-day supply suggested by the Federal Civil Defense Administration in its “Grandma’s Pantry” program. Keep these emergency rations in a carton, ready to be put into the car trunk.

Know what would be needed in the way of water containers, first aid kit, clothing, and blankets. See that it is available in your home and make it the responsibility of one member of the family to see that no item is forgotten if an emergency arises.

 

A few cautions about Civil Defense driving

 

Civil Defense DrivingIn an evacuation, only courtesy, cooperation, and careful driving can prevent disastrous traffic jams. Learn and observe these rules:

• Obey police, civil defense auxiliaries, and other authorities.

• If you have room, pick up walking evacuees.

• Don’t crowd or try to beat the other fellow.

• If your car becomes disabled, try to get off the road.

• If traffic gets stalled, don’t lean on the horn. Your impatience may become someone else’s panic. That can cost lives!

For sale by the Superintendent of Documents, U.S. Government Printing Office, Washington 25, D.C. – Price $2.25 per 100 copies
U.S. GOVERNMENT PRINTING OFFICE 1955-0-362833

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Japanese Searchlight Truck

Japanese Searchlight Truck WW2

BETIO ISLAND, TARAWA ATOLL. This 98 cm. searchlight truck represents standard equipment that has also been taken on Saipan, Peleliu, Lae-New Guinea, and Little Kiska Island. Small size and ease of movement make this light practically impossible to detect. Power for operation of the light is supplied by a built-in generator run by the truck engine. On Little Kiska, the searchlight truck was dug in, camouflaged with nets, and gave the appearance of a small building; on Saipan trucks were housed in underground concrete garages.

Source: Japanese Electronics, Photographic Intelligence Report 1, Office of the Chief of Naval Operations, Navy Department, March 1945.
 

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M36 External Travel Lock

Details of the external gun traveling lock mounted on the rear of the M36 “Jackson” tank destroyer from the M36B1 technical manual TM 9-748: 90-mm Gun Motor Carriage M36B1, War Department Technical Manual, U.S. War Department, Washington D.C., January, 1945. The travel lock was mounted on the rear engine deck, and the turret was traversed to the rear for extended travel. The travel lock latch is mounted off center and latches through a slot in the travel lock.

M36 B1 External Gun Travel Lock

GUN TRAVELING LOCK

a. Description. The gun traveling lock is hinged to brackets mounted on the rear engine compartment cover plate. To release the gun from the gun traveling lock, pull down on the release ring and, at the same time, raise the gun. To lock the gun in the gun traveling lock, hold the gun traveling lock jaws in a halfway open position and, at the same time, lower the gun into the gun traveling lock.

b. Replacement. Drive the lock pin from the right-hand side of each bracket. Drive both hinge pins from the brackets and remove the gun traveling lock. Position the gun traveling lock in the brackets and install the two hinge pins, making sure the lock pin hole in the hinge pin is in line with the lock pin hole in each bracket. Install the lock pin in each bracket.

 

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