Friday, May 25, 2018

Depth charges - ASW

Sub Chasers of the Civil Air Patrol > .
Why Aircraft Patrols Were a Source of Fear for Nazi U-Boats > .
Why Depth Charges Don't Have to Touch a Submarine to Sink It > .

Detonator - Pencil detonator


Pencil detonator


"It is generally understood that the glass ampoule contains acid and that it is the thickness of the steel wire that causes the various delays available. This is however not the case the ampoule contains Copper Chloride and the steel wire has the same thickness regardless of the delay and it is the concentration of the Copper Chloride that gives the various delays.

The period of delay is indicated by the colour of the safety strip. The timings given are for 59° Fahrenheit (15°celsius).

BLACK: 10 Min.,
RED: 30 Min.,
WHITE: 2 Hrs.,
GREEN: 5½ Hrs.,
YELLOW: 12 Hrs.,
BLUE: 24 Hrs.

The delay varies according to temperature. At high temperature the delays are considerably shortened and visa versa. Each tin was packed with 5 pencils all with the same colour code. It was then sealed with a coloured strip of duct tape corresponding to the colour on the safety strips.

The pencil is composed of three different sections. The copper tube contains a clear glass ampoule filled with a green liquid being copper chloride and the brass or aluminum tube is housing the striker, coil spring and a primer. Also aluminium tubes can be found as a substitute for the common brass tube depending on who manufactured the pencils.

The “Signal Relay” or Switch No.10 commonly known as the “time-pencil” is a small and compact delayed-ignition device that could set off a detonator or a Bickford safety fuse. The “Signal Relay” was secretly invented by Cdr. A.G. Langley before the Second World War and he further developed and improved it ending up with the product that we know today as the Switch No.10. After the war Cdr. A.G. Langley was credited for the invention by the British Royal Commission on Awards."

https://en.wikipedia.org/wiki/Pencil_detonator

https://en.wikipedia.org/wiki/Fuse_(explosives)

Bombs, Detonators, Guns, Mines - tb >> .  

Auxilliary unit
http://www.coleshillhouse.com/explosives-of-the-auxiliary-unit.php

Dirty tricks - chemical weapons

Poison Gas Warfare - WW1 > .

DM Kineton

Defence Munitions Kineton since 1942 > .

Defence Munitions (DM) Kineton occupies the site officially known as MOD Kineton, and is a Ministry of Defence property located close to the village of Kineton, Warwickshire, England.

Developed from 1941 onwards between Kineton and the neighbouring village of Temple Herdewyke, it is approximately 10 miles (16 km) from both Banbury and Leamington Spa. Developed as a Central Ammunition Depot, it also served during the Second World War as a transit camp, with Polish and Czechoslovakian troops stationed there.

sī vīs pācem, parā bellum

igitur quī dēsīderat pācem praeparet bellum    therefore, he who desires peace, let him prepare for war sī vīs pācem, parā bellum if you wan...