Rolls Royce .50Cal Heavy Machine Gun

[Jabroni]

Any info/real images of this weapon?

http://i10.tinypic.com/2d8j3oo.jpg

[Anthony91]

You're not going to mod it...are you?

[Jabroni]

No, I only photoshop old/outdated weapons
http://www.militaryphotos.net/forums/showthread.php?t=95685

[solidarnosc]

Is this a new weapon?

[Anthony91]

Is this a new weapon?

From looking at the design of it. I'd say it's old, probably made anywhere from 1940 to 1960.

[urchin]

anyone know it compares to the Ma Deuce and what about the russian 50 cals - which is the best in terms of accuracy and fire power?

[Jippo]

anyone know it compares to the Ma Deuce and what about the russian 50 cals - which is the best in terms of accuracy and fire power?

Russian ones are best of these alternatives. Mor powerful, lighter, and have operating mechanism that improves accuracy over M2.


-jippo

[Kocur]

Well the latter statement may not be so true, at least for all of them. Reportedly the new Kord hmg has changed method of locking over common NSV hmg aka Utyos, which is locked, when bolt is pushed by bolt carrier against a cam in front end receiver, which forces it to move crosswise - behind locking stops. Reportedly those repeating crosswise slams near place, where barrel is mounted caused considerable increace of dispersion.

[oldsoak]

Its a pre-WWII design and used a different cartridge to the Browning. Not produced in any quantity, I suspect because the Brownings were superior.
Tony Williams does a site dealing in cartridges and mgs - good site andhe might have info.
www.quarry.nildram.co.uk

[Jippo]

Well the latter statement may not be so true, at least for all of them. Reportedly the new Kord hmg has changed method of locking over common NSV hmg aka Utyos, which is locked, when bolt is pushed by bolt carrier against a cam in front end receiver, which forces it to move crosswise - behind locking stops. Reportedly those repeating crosswise slams near place, where barrel is mounted caused considerable increace of dispersion.

Interesting, I have not heard that thing about NSV. I still do think that the design of NSV is considerably better also accuracy wise than the recoiling barrel of M2. In my experience gun itself is accurate but recoil will cause dispersion depending on mount tolerances.


-jippo

[Straker]

I thought the Vickers .50 calibre design was based on an upgraded Vickers MMG not a new design. Certainly the pictures of it on the LRDG vehicles I've seen certainly make it look like one, just a bit bigger?

Was their another Vickers weapon designed to take the same .50 cartridge? I know the Japanese used the cartridge and an upgraded Browning aircraft MG design to make a weapon but I'm not sure we did.

Me thinks me need Mr. Williams to make a visit to this thread.

Edited to say: I'm an idiot I read it as Vickers not RR for some reason certainly they were the originators for the cartridge and developed an MG for anti aircraft use and arming light tanks.

[Molli]

I swear I've got some info' on the RR. I'll try to find it and get it posted!

[silveykyle]

yay jabroni!!11. Please don't make this into another abortion of a weapon.

[Molli]

Here we go...

From Small Arms Of The 20TH Century (5TH & 7TH Editions), Ian V. Hogg and John S. Weeks:

'Gun, Machine, Rolls-Royce Experimental, 1941

Rolls-Royce Ltd., Derby

.50 Browning, 55-Calibre Boys

Although their design was never finally developed as a service weapon, the fact that the Rolls-Royce once made the venture into the machine-gun field is felt to be of sufficient interest to warrant a mention here.

In 1941 Rolls-Royce began to develop a gas-operated machine-gun for use in aircraft turrets; it was intended to fire the standard American .50 Browning catridge. In order to reduce wieght and size to a level suited to aircraft use, the barrel was some 5 inches (126mm) shorter than that of the Browning, and the body and cover of the gun were to be made from RR50 aluminium alloy. As finally developed, the gun was recoil-operated and used a breech-locking system based on the Friberg-Kjellman-Degtyarev system with refinements by Rolls-Royce. As the barrel and breechlock recoiled, a pair of accelerator levers carried back a wedge-like balance-piece and retracted the striker The withdrawal of this balance piece allowed the bolt-lock arms to fold in and unlock the breech, after which, the accelerators threw the block back at high speed to strike an oil buffer at the rear of the body. At the same time, a feed claw withdrew the next round from the belt and this was guided down and back to rest on guide lips ready to be rammed into the chamber. The barrel returned into battery under the power of it return spring, while the bolt was returned not by a spring, but by the pressure of the oil in the buffer, collecting the fresh round en route and loading it. As the mechanism went forward, the balance piece opened out the breech locks and then carried the firing pin on to the cap to fire the round.

In March 1941, the gun was delivered for trial at the Proof and Experimental Establishment, Pendine. Owing to the short barrel, a long flash-hider had to be used - which rather detracted from the original intentions - and the trial was bedeviled by minor stoppages, culminating in the breaking of the extractors. A month later, Rolls-Royce decided to redesign the gun around the high-velocity belted 55-caliber round from the Boys anti-tank rifle, the result of which would have produced a very formidable weapon. The Ordance Board agreed that the idea showed promise, and furnished 2,000 rounds for use in preliminary trials, but it would seem that shortly after this Rolls-Royce decided that they had enough to occupy their minds in the matter of making aircraft engines, and in 1942 came notification that the development had been dropped.

Length: 50.50in (1270mm)
Weight (Unloaded): 49lb 0oz (22.22kg)
Barrel: 40.00in (1016mm), 6 grooves, right-hand twist
Magazine: 250 belt
Cyclic Rate: 1000rds/min
Muzzle Velocity: c. 2340ft/sec (712m/sec)'

http://img87.imageshack.us/img87/5940/rrmgus1.jpg

[GazB]

have heard that the M2 is a real pain in the a$$ when it comes to barrel changes. When you change a barrel you have to adjust the head spacing and the timing otherwise you will have serious problems. The Russian HMGs don't have such problems, and the current Kord is supposed to be very accurate compared to previous model soviet 12.7mm guns. The 4 barrel gatling 12.7mm guns in the Hind (there were two models) were supposed to be excellent weapons too, the first was realtively light at 45kgs, but was replaced by a heavier model (about 60kgs) that had heavier barrels that could fire off the entire supply of 1,400 odd rounds of ammo in one burst without overheating.
The only reason it was replaced in the Hind was because it lacked range when the enemy was firing back with a similar calibre, but spewing out rounds at a rate of 5,000rpm, and when using duplex rounds (with two projectiles in one shell case) doubling that to 10,000rpm made it an excellent man killer.

[GazB]

A month later, Rolls-Royce decided to redesign the gun around the high-velocity belted 55-caliber round from the Boys anti-tank rifle, the result of which would have produced a very formidable weapon. The Ordance Board agreed that the idea showed promise, and furnished 2,000 rounds for use in preliminary trials, but it would seem that shortly after this Rolls-Royce decided that they had enough to occupy their minds in the matter of making aircraft engines, and in 1942 came notification that the development had been dropped.


The Soviets decided to make a HMG based on their 14.5 x 114mm anti tank rifle round. The result was the KPV which is still in service in a role similar to western 20mm cannon.

[gulogulo]

Nothing can replace the Browning M2, reliable(if maintained proberly) and very precise...p-)

I think this is more interesting than the RR:

http://world.guns.ru/machine/mg26-e.htm

[Airforce1]

Any info/real images of this weapon?

http://i10.tinypic.com/2d8j3oo.jpg

i have that book

[Hydro]

have heard that the M2 is a real pain in the a$$ when it comes to barrel changes. When you change a barrel you have to adjust the head spacing and the timing otherwise you will have serious problems.


Only a problem on older versions. Almost all "new" M2HB's have quick change barrels that have no need for headspacing.