ファイル:Type91 AerialTorpedo Rev3 StructuralDrawing.svg

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概要

解説
English: Type91 AerialTorpedo Rev3 StructuralDrawing
Warhead, Length = 1,460 mm (57-5/8in)
When a torpedo hits a warship, the inertial collision of the aft mass in the warhead thrusting forward and ignites the highly explosive. A 20mm explosive cannon shellfire gone through the warhead cannot ignite the locked highly explosive in warhead. Unless otherwise the ignition of the inner mass, the highly explosive will not explode.
The warhead has T shaped strip parts to reinforce the internal-lower portion of the front shell against the heavy impact on water entry. For the production model, the warhead section needs five reinforced strip bands on the front-bottom of the inner shell, lap welded in a shape of cut lower half star, or the superpose of the letter T and the letter Λ, instead. The warhead also has two tiny stitch lines aligned on the front-top of the shell to enhance the explosion. Torpedo bombing is launched from aircraft power gliding high in the sky. Type 91 aerial torpedo released at altitude 100m, is falling in speed nearly March 0.5 on water entries, receives over 100G at the hard impact on the water surface.
Air chamber, L = 1,068 mm (42-1/8in)
The air chamber is a cylinder of thin shell made by alloy of nickel chromium-molybdenum steel. This tough steel alloy was originally developed for steel armor plate of battleship. The chamber is charged with highly compressed normal air at 175 - 215 atm (2,500 - 3,000 psi), which burns fuel oil to produce driving power. It loses the pressure down to around 50 atm (710 psi) while running 2,000 m (6,600 ft) under the water.
Front float, L = 733 mm (28-7/8in)
Front float section has a pure water tank, a fuel oil tank and a depth meter. The depth meter is placed at the inner bottom of the section to detect the water depth level. It detects the displacement level of the water depth and controls the tail horizontal rudders proportionally, so that the torpedo keeps level running under the water.
Engine room, L = 427 mm (16-7/8in)
This section is constructed free to coming in the water to help a cooling system of the engine in the torpedo. It has a starter, a Chowaki or pressure regulator, a wet-heat chamber, a main engine, and a horizontal rudder (or elevator) controller. The pressure regulator is called as Chowaki or harmonizing system for the engine, it actually is a two-stage pressure regulator with twin pressure-tunable regulation valves. It steps down the pressure of compressed air at 215 - 50 atm (3,000 - 711 psi) in the air chamber to the constant high-pressure air at 10 atm (142 psi). While the air pressure is declining as the torpedo is running under the water, the pressure regulator feeds the constant high-pressure air to the engine intake aspirator and keeps the constant running speed in 43 knots (or 80 km/h, 50 mile/h).
The wet-heat chamber is made by heat resistant steel. Type 91 aerial torpedoes use wet-heater engine like almost all other torpedoes in World War II. The general wet heater burning method drastically improved the combustion efficiency of torpedo engines. It burns the mixed gas of fuel oil and the high-pressure air with spraying pure water in the wet-heat block to produce burning steam gas fed to the engine. The high-pressure fuel oil gas is burning at a temperature 800 degrees C (1,500 degF). The sprayed pure water mists into the combustion gas, which produces vapor explosion, results in completely gasified fuel oil combustion.
The main engine is an 8-cylinder single-row radial piston engine.
The horizontal tail rudder controller is operated by the rod connection mechanism from the depth meter in the front float section.
Rear float, L = 1,002 mm (39-1/2in)
A single drive shaft is going through the section to the tail. This rear float section has a machine oil tank, a rudder controller, an anti-rolling controller, and roll rudders on both side. The machine oil tank is center-mounted in the rear float section. The rudder controller is a general gyrocompass controlled system, which is steering vertical rudders to keep the longitudinal axis of the torpedo in the sensed direction straight. The Gyrocompass starts rotating when a torpedo is released from aircraft. The gyro has double ring supporter to move freely.
Roll rudders, Stabilizing rudder, or roll rudders are put on both side of the torpedo, being steered to produce counter-rolling moment. Each rudder is a small 8cm2 size square metal wing. Each roll rudder has been covered with a temporal wooden extended wing of 12 x 20 cm2 (4-3/4in x 7-7/8in), tighten with six aluminum sharing pins on both side-edge to get enough aerodynamic force in the air, that is to be shed and broken off when the torpedo gets the hard impact from the water surface on water entry. The remained original metal roll rudders are steering in the water running to converge the rolling movement arisen on water entry.
Tail section and twin screws, L = 530 mm (to the tip end of propelling screw hub) (20-7/8in)
There are bevel gars driving coaxial contra-rotating double 4 blades screws to propel torpedo running straight under the water. Tail section has vertical and horizontal stabilizer fins in cross. Each fin has a controlling rudder in aft. Horizontal fins and rudders or elevators have wide span in longitudinal direction and work proportionally, while vertical fins are small, and rudders have very short span.
Screws
Screws are coaxial contra-rotating double screw, with 4 propeller blades each. Each screw is wrought from a cube steel alloy mass into bold cross shape and punched through the center. Hammering punches of 1 tons and 3 tons shape 4 blades.
日付
原典 Own work by uploader, and converted my PNG file to SVG file
作者 Shun Zero
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成立日

9 5 2009

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現在の版2009年5月9日 (土) 14:402009年5月9日 (土) 14:40時点における版のサムネイル850 × 638 (119キロバイト)Shun Zero{{Information |Description={{en|1=Type91 AerialTorpedo Rev3 StructuralDrawing :Warhead, Length = 1,460 mm (57-5/8in) ::The detonator is unlocked after running certain distance under the water. A 20mm explosive cannon shellfire gone through the warhead can

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