[quote=“DocAV”]There have been noted(both on this (old) Board , and on Gunboards, packets of both Loose 7,7SR cartridges and Clipped (5 rounds) 7,7SR cartidges. The Boxes refer to “Cartridges Type 92” with the addition of the dual use (T89 Airforce and T92 ground Guns)
The Single Type 89 preceded the Binary T89, so a “Loose pack” would be logical ( 50 rounds Loose pack carton). The Binary T89, with its chain drive Snail magazines, were essentially a step backwards to the Type 11 ratchet feed from 5 round clips…instead of a hopper, the clips were carried on a chain, stripped of their cartridges as they reached the ratchet mechanism, and continued on back into the mag body. When the Aircrew Armourer reloaded the magazines, pushing a Full clip into engagement in the chain caused the empty clip to fall out ( and could be refilled from “Loose” Rounds)
Probably the reason for the "chain-snail mag, is that the guns were held too close together to use the large diameter Vickers-type Pan used on the Single T89 gun --as the RAF etc, used the Vickers GO gun in Binary Mounts, with two pans of lesser diameter. The Soviets, in their DT gun, also used a copy of the Vickers GO pan, but deeper, to hold more ammo than their single layer DP Ground gun, with its Pizza-size Pan.
Why the Japanese didn’t simply go for a belt-fed flexible gun (they already had the Vickers Aircooled T89 (fixed) with disintegrating Prideaux Links, also in 7,7 SR (Airforce) and 7,7R (Navy), is a complete mystery.
I have got the 5-round brass charger (stripper clip) in 7.7x58SRmm calibre and also a fragment of the conveyor belt removed from a Type 89 fan-shaped magazine.
The steel chargers on the belt/conveyor for the type 89 are firmly riveted in place with two hinge pins per charger and could not be pushed out by a full charger as described above. The magazine held 25 such chargers totalling 125 rounds per gun. Was there a different version of this mag with removable chargers or were the rounds pushed out of the brass charger into the mag conveyor via some loader/adaptor? I have been trying to find out the purpose of the 5-round brass chargers for a long time and am getting no nearer yet.