The P-38 (larger variant known as the P-51) is a small can opener that was issued with canned United States military rations from its introduction in 1942 to the end of canned ration issuance in the 1980s. [1] Originally designed for and distributed in the K-ration, it was later included in the C-ration. The lightweight, tiny, P-38 foldable military can opener was designed and patented by J.W.SPEAKER Corp. (who also designed and patented the "HEATAB" dry fuel tablets used to heat the U.S. Military rations during World War II).[ citation needed ] As of 2024, it is still in production and sold worldwide. [2]
The P-38 is known as a "John Wayne" by the United States Marine Corps, because of its toughness and dependability. [3] [ unreliable source? ] The can opener is pocket-sized, approximately 1.5 inches (38 mm) long, and consists of a short metal blade that serves as a handle, with a small, hinged metal tooth that folds out to pierce the can lid.
A notch just under the hinge point keeps the opener hooked around the rim of the can as the device is "walked" around to cut the lid out. A larger version called the P-51 is somewhat easier to operate. The handle portion can also double as a makeshift flat-blade screwdriver, with limited ability because of the rather soft sheet metal used.
Official military designations for the P-38 include "U.S. ARMY POCKET CAN OPENER" and "OPENER, CAN, HAND, FOLDING, TYPE I". As with some other military terms (e.g., "jeep"), the origin of the term is not known with certainty. The P-38 opener coincidentally shares a designation with the Lockheed P-38 Lightning fighter plane, which could allude to its fast performance; additionally the P-51 can opener also has an aircraft namesake in the North American P-51 Mustang. [1]
One explanation for the origin of the name is that the P-38 is approximately 38 millimeters long. This explanation also holds for the P-51, which measures approximately 51 mm (2.0 in) in length. However, use of the metric system in the U.S. was not widespread at this point, and United States Army sources indicate that the origin of the name is rooted in the 38 punctures around the circumference of a C-ration can required for opening. [1]
P-38s are no longer used for individual rations by the U.S. military, as canned C-rations were replaced by MRE rations in the 1980s, packed in plastic pouches. The larger P-51s are included with United States military "Tray Rations" (canned bulk meals). They are also still seen in disaster recovery efforts and have been handed out alongside canned food by rescue organizations, both in the U.S. and abroad.
The iconic P-38 can opener was designed, patented and manufactured by J.W. Speaker Corporation of Germantown, Wisconsin [4] (stamped "Speaker USA") and was also manufactured by Washburn Corporation (marked "US Androck"); they were later made by Mallin Shelby Hardware inc (defunct 1973) of Shelby, Ohio and were variously stamped "US Mallin Shelby O." or "U.S. Shelby Co."
The P-38 is cheaper to manufacture than a standard can opener, and is smaller and lighter to carry. The device can be easily attached to a keychain or dog tag chain using the small punched hole.
The P-38 is easily used. First, the cutting point is pivoted to its 95-degree position, [5] from its stowed, folded position. Then, for a right-handed user, the P-38 is held in the right hand by the flat long section, with the cutting point pointing downward and away from the user, while also hooking the edge of the can through the circular notch located on the flat long section next to the cutting edge. The can is held in the left hand, and the right hand is rotated slightly clockwise, causing the can lid to be punctured.
The can is then rotated counter-clockwise in the left hand, while the right hand rotates alternatively slightly counter-clockwise and slightly clockwise, until the can has been rotated nearly 360 degrees and the lid is nearly free. The lid of the now opened can is lifted, most often with the P-38 cutting edge, and the P-38 is wiped clean, and the cutting point is rotated back to its stowed, folded position. The P-38 is then returned to its stored location, whether that is dangling on a dog tag chain around one's neck, or in one's pocket if the P-38 is attached to a key ring.
Left-handed users simply hold the P-38 in their left hand, with the cutting point aimed towards themselves, while holding the can to be opened in their right hand, while also reversing the sense of the cutting hand movements just described. By tradition, 38 cuts as just described were supposedly required to open a can of C-Rations.
A left-handed user is at a slight disadvantage in that the tip of the thumb (instead of the lateral flank of the distal index finger) must apply the combined travel & twist forces. Righties' thumbs take only the twist force.
A similar device that incorporates a small spoon at one end and a bottle opener at the other is currently employed by the Australian Defence Force and New Zealand Army in its ration kits. The Field Ration Eating Device is known by the acronym "FRED". It is also known widely in its derogatory backronym, the "Fucking Ridiculous Eating Device". [6] [7]
Another similar device was included with British Army "Operational Ration Pack, General Purpose" 24-hour ration pack and "Compo" Composite (14 man) Ration pack rations. At one stage they were manufactured by W.P. Warren Engineering Co. Ltd, Birmingham, England. The instructions printed on the miniature greaseproof paper bag they were supplied in read:
TO OPEN CAN:
Place opener on the can with rim of can inside the slot. Hold between thumb and forefinger and twist forward to puncture. Repeat motion until can is open.
It takes approximately 38 twists to fully open a C-ration can. Their design is similar, but not identical, to the P-38 and P-51 can openers.
The Swedish army also employed a similar variant of this opener. Its official designation is M7481-021000 Konservbrytare Mini which was distributed with the notorious "Golden Cans" (Swedish field rations were packaged in metallic tins with a golden hue). In 1924, a similar device was featured in Popular Mechanics , with no mention of a military provenance. [8]
An opener similar to the P-38, but with a non-folding blade, was popular in Poland for years. It can still be found in shops as well as the butterfly-type openers.
It has been accused of copying because there are many similarities with the revolutionary pocket can opener, advertised as being for explorers, "Explorador español", manufactured in Spain in 1906, designed by [| D. José Valle Armesto], which would become the first pocket can opener, due to its lightness and versatility, as it allowed, in addition to opening cans, to do the same with bottle caps or act as a screwdriver. [9] [10] [11] [12]
A knife is a tool or weapon with a cutting edge or blade, usually attached to a handle or hilt. One of the earliest tools used by humanity, knives appeared at least 2.5 million years ago, as evidenced by the Oldowan tools. Originally made of wood, bone, and stone, over the centuries, in step with improvements in both metallurgy and manufacturing, knife blades have been made from copper, bronze, iron, steel, ceramic, and titanium. Most modern knives have either fixed or folding blades; blade patterns and styles vary by maker and country of origin.
The Meal, Ready-to-Eat (MRE) is a self-contained individual United States military ration used by the United States Armed Forces and Department of Defense. It is intended for use by American service members in combat or field conditions where other food is not available. MREs have also been distributed to civilians as humanitarian daily rations during natural disasters and wars.
The C-ration was a United States military ration consisting of prepared, canned wet foods. They were intended to be served when fresh or packaged unprepared food was unavailable, and survival rations were insufficient. It was replaced by the similar Meal, Combat, Individual (MCI) in 1958; its modern successor is the Meal, Ready-to-Eat (MRE).
The 10-in-1 food parcel, commonly known as the 10-in-1 ration, was a United States military ration issued during World War II. As its name implies, the 10-in-1 provided the needs of ten soldiers in a single ration package.
A can opener or tin opener is a mechanical device used to open metal tin cans. Although preservation of food using tin cans had been practiced since at least 1772 in the Netherlands, the first can openers were not patented until 1855 in England and 1858 in the United States. These early openers were basically variations of a knife, though the 1855 design continues to be produced.
A mess kit is a collection of silverware and cookware designed for use by military personnel for food and military rations. They may also be used during camping and backpacking. There are many varieties of mess kits that militaries issue to their personnel that later become available to consumers.
United States military ration refers to the military rations provided to sustain United States Armed Forces service members, including field rations and garrison rations, and the military nutrition research conducted in relation to military food. U.S. military rations are often made for quick distribution, preparation, and eating in the field and tend to have long storage times in adverse conditions due to being thickly packaged or shelf-stable.
A pocketknife is a knife with one or more blades that fold into the handle. They are also known as jackknives (jack-knife), folding knives, EDC knife, or may be referred to as a penknife, though a penknife may also be a specific kind of pocketknife. A typical blade length is 5 to 15 centimetres.
The K-ration was a United States military ration consisting of three separately boxed meal units: breakfast, dinner, and supper. It was originally intended as an individually packaged daily ration for issue to airborne troops, tank crews, motorcycle couriers, and other mobile forces for short durations.
A field ration is a type of prepackaged military ration designed to be easily and quickly prepared and consumed in the field, in combat, at the front line, or where eating facilities are otherwise unavailable. Field rations are primarily used by military forces, though they are also sometimes distributed to civilians as part of humanitarian aid and emergency management. They differ from garrison rations and field kitchen provisions, which are intended for where proper meals can be supplied and prepared with relative ease and safety, such as in the rear where logistics are steady and fresh food can be supplied. They are similar to, but distinct from, other purpose-designed long-lasting types of food or rations such as emergency rations, humanitarian daily rations, and camping food.
The Individual Meal Pack or IMP is one type of field ration used by the Canadian Forces. The IMP is designed so that a continuous diet provides all the nutrition needed to sustain a service member in the field. The IMP meets Canada's nutrition requirements, with the exception of calcium and folic acid, which are not significant if the consumption period of rations is less than 30 (consecutive) days. IMPs provide 1,200–1,400 calories (5.0–5.9 MJ) per meal.
The 5-in-1 ration was a United States military ration issued from 1942 to the end of World War II. As its name implies, the 5-in-1 provided the needs of five soldiers in a single ration package. Procurement ended with the war, though remaining stocks were issued to troops after the war, as well as distributed as surplus in civilian feeding programs overseas. The 5-in-1 specification remained in effect after the war, and was again used in 1948 for a new field ration.
The Jungle Ration was a dry, lightweight United States military ration developed by the U.S. Army during World War II for soldiers on extended missions in tropical regions.
The field ration eating device (FRED) is an Australian eating utensil and multi-tool that serves as a combination of a can opener, bottle opener, and spoon. As its name suggests, it is issued to the Australian Defence Force for use with its Combat Ration One Man field rations. It was first issued around 1943.
The M-1956 load-carrying equipment (LCE), also known as the individual load-carrying equipment (ILCE), was developed by the U.S. Army and first issued in the early 1960s. The M-1956 LCE was designed to replace the M-1945 Combat Pack, the M-1923 cartridge belt, the M-1936 pistol belt and the M-1937 BAR magazine belt. The M-1956 LCE was designed to be quickly configured, using no tools, to accommodate various mission and ammunition loads. The M-1956 LCE remained in service through the 1980s and set the standard for future United States military load-carrying equipment.
The Combat Ration One Person (CR1P), formerly known as the Combat Ration One Man (CR1M) is a self-contained individual field ration in lightweight packaging procured by the Australian Defence Force for use in combat or other field conditions where organised food facilities are unavailable.
Military rations, operational rations, or military provisions are goods issued to sustain the needs of military personnel. As their name suggests, military rations have historically been, and often still are, subject to rationing, with each individual receiving specific amounts from available supplies. Military-issued goods and the rationing of such goods have existed since the beginnings of organized warfare.
The Food Packet, Long Range Patrol was a freeze-dried dehydrated United States military ration used by the Department of Defense. Developed in 1964 and intended for wide adoption during the Vietnam War, its use was eventually limited to American special operations forces during long-range reconnaissance patrols, where bulky canned Meal, Combat, Individual (MCI) rations proved too heavy for extended missions on foot. The LRP had a cold-weather warfare equivalent, the Ration, Cold Weather (RCW).
The Meal, Combat, Individual (MCI) was a United States military ration of canned and preserved food, issued from 1958 to 1980. It replaced the earlier C-ration, to which it was so similar to that it was often nicknamed the "C-ration", despite the term never being used officially. The MCI was eventually replaced by the Meal, Ready-to-Eat (MRE).