Marine Bombing Squadron Six-Thirteen
October 1, 1943 - November 21, 1945
VMB-613 Insignia


Oil Capacity:  76 US gallons.

Fuel System:  An independent fuel system was provided for each engine with a cross-feed system to permit fuel to be transferred between tanks on opposite sides of the aircraft.  The main fuel supply was carried in four large self-sealing wing tanks, located between the fuselage and engine nacelle.  An auxiliary fuel supply consisted of six smaller self-sealing tanks installed in groups of three in each wing center section outboard of the main fuel tanks.  In addition to the main and auxiliary tanks, a 215 gallon self-sealing tank was normally mounted in the upper portion of the bomb bay, although this tank could be removed to accommodate larger larger loads of ordnance or a 585 gallon droppable tank.  When no ordnance was carried, a droppable 335 gallon metal fuel tank could be installed in the bomb bay beneath the the upper bomb bay tank.  Fuel flow was from the main tanks through a booster pump, to a fuel strainer, then to the engine-driven fuel pump that delivered fuel to the carburetors.  All main and transfer fuel feed lines were self-sealing.  A schematic for the fuel system is provided at the following link:  Fuel System Schematic 

Engine Fire Extinguisher System.  A pressurized engine fire extinguisher system was installed incorporating two Carbon Dioxide cylinders.  Carbon Dioxide gas from this system could be directed from one or both cylinders to either engine via a selector valve, located on the fire extinguisher control panel in the cockpit.  A schematic for the engine fire extinguisher system is provided at the following link:  Engine Fire Extinguisher System Schematic

Search Radar:  VMB-613's aircraft was fitted with the AN/APS-3 search radar in a radome located on the starboard wingtip.  Produced by Philco and commonly referred to as Dog, this radar operated in the X-band and had a usable range of 10 to 40 nautical miles.  Its primary function was to assist in the location of shipping targets. 

Pilot's Gun Sight:  The pilot was provided with a Type N-3B optical gun sight with a Type A-1 or A-2 combination gun-and-bomb head for sighting the nose guns and package guns.  This sight could also be used for minimum altitude bombing and had five stops which could be preset to predetermined bombing angles.  These settings provided a line of sight parallel to the flight path of the aircraft, to a bombing position in which the line of sight was from 1 to 14.5 degrees below the flight path.  An auxiliary ring-and-bead sight was also provided.

Armament: Thirteen Browning M-2 .50 caliber machine guns with 4,900 rounds.  Additional information pertaining to the machine guns is provided at the following link:  Browning M-2 .50 Caliber Machine Gun

Maximum Bomb Load:  4,000 pounds.  Additional information pertaining to the bomb load is provided at the following links:

Bomb Bay Configurations

General Purpose and Armor Piercing Bombs

Mark 13 Aerial Torpedo

Additional Ordnance Eight 5-inch High Velocity Aircraft Rockets (HVARs) mounted on external under-wing rocket rails.  Additional information pertaining to the 5-inch HVAR is provided at the following link:  5-Inch HVAR

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