British Ordnance Collectors Network
This is a sample guest message. Register a free account today to become a member! Once signed in, you'll be able to participate on this site by adding your own topics and posts, as well as connect with other members through your own private inbox!
No.63 Rifle Grenade (smoke) question
- Thread starter Brennan
- Start date
SERVICE: Land
DESIGN/PART NO: DD(L) 4783(E)
TYPE: Smoke, discharger cup
FILLED WEIGHT: 1 lb 3 ozs
EXPLOSIVE CONTENT AND WT OF EXPLOSIVE: Hexachloroethane/Zinc
PRINCIPAL DESIGN FEATURES: A thin steel body filled with Berger mixture, a priming composition and delay pellet. Generally similar to the No.56 grenade but external dimensions are 2.56 ins dia x 2.6 to 2.88 ins long. Developed in order to supersede the No.55 and 56 grenades.
MARKING: Brunswick green body colour, with Red filling band.
MK 1 introduced into service in March 1935 and declared obsolete Dec 1945
DESIGN/PART NO: DD(L) 4783(E)
TYPE: Smoke, discharger cup
FILLED WEIGHT: 1 lb 3 ozs
EXPLOSIVE CONTENT AND WT OF EXPLOSIVE: Hexachloroethane/Zinc
PRINCIPAL DESIGN FEATURES: A thin steel body filled with Berger mixture, a priming composition and delay pellet. Generally similar to the No.56 grenade but external dimensions are 2.56 ins dia x 2.6 to 2.88 ins long. Developed in order to supersede the No.55 and 56 grenades.
MARKING: Brunswick green body colour, with Red filling band.
MK 1 introduced into service in March 1935 and declared obsolete Dec 1945
Thanks Spotter, seems like the same filling as the 2 inch Mortar;
S.R. 269
hexachloroethane (44%)
zinc oxide (40.5%)
calcium silicide (13.5%)
potassium nitrate (2%)
But no filling weight eh? Would you happen to know the filling weight for the 2 inch Mortar? Might give us a rough idea if the grenade pam lists a one minute burn time and the mortar pam notes two minutes.
S.R. 269
hexachloroethane (44%)
zinc oxide (40.5%)
calcium silicide (13.5%)
potassium nitrate (2%)
But no filling weight eh? Would you happen to know the filling weight for the 2 inch Mortar? Might give us a rough idea if the grenade pam lists a one minute burn time and the mortar pam notes two minutes.
The filling weights for the No 63 were two increments of SR269 each 2755 grains, and 400 grains of SR252 priming composition.
The 2-inch Mortar Smoke (Mk II) had three increments of SR269(M) each of 7600 grains, and 400 grains of SR252 priming compositions.
Burn rates are not just a function of filling quantity. Burning surface area and pressure due to orifice sizes come into it (plus other factors no doubt).
see http://www.bocn.co.uk/vbforum/spanish-2inch-mortar-t27844.html?t=27844 if you are interested in the link between grenades and 2-inch mortars (grenade throwers).
The 2-inch Mortar Smoke (Mk II) had three increments of SR269(M) each of 7600 grains, and 400 grains of SR252 priming compositions.
Burn rates are not just a function of filling quantity. Burning surface area and pressure due to orifice sizes come into it (plus other factors no doubt).
see http://www.bocn.co.uk/vbforum/spanish-2inch-mortar-t27844.html?t=27844 if you are interested in the link between grenades and 2-inch mortars (grenade throwers).
Last edited: