Coaxial Barrel
How did WW2 Air Cooled Machine guns stay cool when in some cases covered with a metal sleeve?
I know a lot of WW2 Tank’s air cooled hull machine guns and some coaxial machine guns from various nations are exposed without a sleeve or guard. Some air cooled coaxial machine guns I noticed are semi recessed into the mantlet or turret and is the gap left around the diameter of the barrel to allow air to circulate around the barrel.lastly, do any countries during WW2 use fans and air vents to pump air around around air cooled coaxial machine guns. I suppose all of the above might not be necessary as I don’t know how fast and how long it takes for a air cooled machine gun barrel to heat up and cool down. Cheers John.
Barrel heating varies from gun to gun. Rate of fire, how many rounds are fired over a given period of time, barrel thickness and the effeciency of the cooling jacket all come into play.
The German MG42 was the worst offender. A barrel change was REQUIRED after just 100 rounds of sustained fire. Tanks usually had heavy barrel versions of the MG34 though.
The American Browning M1919 didn’t really have problems with barrel overheating. The ROF was relatively low and the barrel quite thick. If the gunner practiced good fire discipline (bursts only – sustained fire was pretty useless) it probably wasn’t an issue.
The gun mountings were snug. Any hole in the armor is a weak point so these were kept as small as possible. I was crawling around an M8 armored car yesterday and the coax M1919 was in the mantlet so tight I wonder if they had to grease it to get it in there 
In many instances the gun was contained entirely within the vehicle with a small hole only large enough for the bullets to pass in the armor.
Bandini GT
I want to introduct something about Couragia Series (COURAIGA M/T). The ultimate off-road tire offers great traction on dirt, rock, mud and gravel. PR/QR 75/80/85 Couragia M/T is specially created for conquering any off-road conditions, especially mud terrain. With specially formulation of advanced tread compound, Couragia M/T can resists cuts, chips and abrasions for long life and even wear. Uniquely designed incremental block edge improves clearance of dirt and sand for constant performance. Unprecedented traction, grip and strength, Couragia M/T is designed to handle the toughest terrains.
This English may require cleanup to meet Wikipedia’s quality standards. Please improve this English if you can. (July 2008)
The Bandini GT 750 is a road car produced in 1955 by Bandini Cars in Forl.
This is the first this type two-seater to wear the Bandini badge. Born as a road car, it shared the 750 sport siluro chassis and engine developed for racing.
The coup body carries the characteristic features of company Zagato who created it completely in aluminum. It is only 1.14metres (45in) high, far less than 4 is very compact and lightweight with a style well-defined.
In 1957 the car was recognized with first prize in the Competition d’elegance city of Rimini. ” It started its racing career from 1959 that saw overseas run famous racing circuits such as Daytona and Sebring where it was forced to retire after 27 laps for the broken radiator. Official drivers of Racemaster team were Victor Lukens and Fred Haynes.
Chassis
Bandini 750 GT in Sebring 1960.
The frame of 750 Bandini GT comes directly from that of 750 sports torpedo with a slight and insignificant increase in size and the adoption of a bar anti also to rear.
Structure and material: frame of elliptical section tubes, special steel aeronautics derivation;
Suspension:
Front: Independent, triangles overlapping with shock absorbers hydraulic telescopic tilted and soft cylindrical helical coaxial; bar Account
Rear: a bridge disk, with two leaf spring semiellittiche longitudinal vertical telescopic hydraulic shock absorbers, bar Account
Braking system:
Service: hydraulics, drum
Parking: mechanical tape on transmission
Steering: a worm with damper vibration
Guide: on the left (right upon request)
Wheels: Borrani Ray 12 ”
Tyre: 5.20 “x 12″ (a request with white band)
Fuel tank capacity: 45L (12US gal; 10impgal)
Transmission: Rear transmission shaft, central differential and halfshafts
Weight: bare chassis 27kg (60lb)
Weight total vacuum: 450kg (990lb)
Engine
In race in Sebring in 1960
On Bandini GT was used engine Bandini DOHC, the first and second series for road use.
Positioning: forward longitudinal, 4 cylinders in line
Materials and particularity: base 5 media bench and sump aluminium of 5 litres capacity, Head aluminum alloy DOHC with 8 valves inclined, hemispherical chambers of the outbreak, cylinders dismantled in cast iron block.
Bore: 63.5mm (2.5in)
Stroke: 59mm (2.3in)
Displacement: 747 cc
Compression ratio: 8,4:1
Fuel system: 2 Weber carburetors double body 35DCO3
Power: 62 CV @ 7000 rpm
Lubrication: Carter wet with a pump gears, aluminum radiator barrel
Cooling: forced liquid with centrifugal pump controlled by pulley and belt, cooler on the front
Gearbox and clutch: 4 speed + RG, clutch single dry disc
Ignition and electrical equipment: reel and distributor switch on the head, 12 V battery and generator
See also
Bandini Cars
Ilario Bandini
External links
Unique Cars International Register
Bandini Automobiliofficial site
- Models –
Barchette: “La prima” 1100/46 1100 sport 1100 siluro Bandini-Maserati 1500750 sport siluro 750 sport internazionale “saponetta”Formula: Formula 3 Formula juniorGT: 750 GT Zagato 1000 GTSport coup: Saloncino Berlinetta 1000 turbo 16ViSport prototipo: 1000/62 P 1000/66 sport 1000/70 VMille s.p. 1300 16ViEng. H.C. Ilario Bandini
Categories: Bandini vehicles | Sports racing cars | 1950s automobiles | Sports cars | Vehicles introduced in 1955 | Classic post-war auto stubs
Hidden categories: Cleanup from July 2008 | All pages needing cleanup(and so on) To get More information , you can visit some products about Baby Bed Parts, Delta Machinery Parts, . The Couragia Series (COURAIGA M/T) products should be show more here!
About the Author
himfr can provide you most popular hot products from china!