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Old 27th February 2007, 16:06
yogybär yogybär is offline
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ASh82FN / La5FN-1943-Standard questions

Concerning the engine:
Was Forszah allowed to use at high altitude? Does anyone have a datasheet or a output-over-altitude-chart?

Concerning the plane:
Is there a speed / climb over altitude-chart?

Thanks!
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Old 1st March 2007, 08:15
RossGmann RossGmann is offline
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Re: ASh82FN / La5FN-1943-Standard questions

Not sure if the following is of any help


http://ca746b1ff10193a3ce20878dec04a733.zh.infofx.net/en/Shvetsov+ASh-82


Shvetsov ASh-82

Background

The Shvetsov ASh-82 (M-82) is an air-cooled radial piston engine developed from Shvetsov M-62 which entered production in 1940 and saw service in a number of Soviet aircraft. It powered Tupolev Tu-2 bombers and when the inline engine-powered LaGG-3 was adopted for ASh-82, the famous Lavochkin La-5 and Lavochkin La-7 fighters were created. Over 70,000 ASh-82 were built. Modifications


- ASh-82F (M-82F) - identical to ASh-82 except for the improved cooling and lubrication which allowed unlimited operation at takeoff power.
- ASh-82FN (M-82FN) - ASh-82F with fuel injection, power output increased to 1,850 hp on takeoff with only a 66 lbs (30 kg) increase in engine weight.
- ASh-21 - a single-row 7-cylinder version of ASh-82 for Yakovlev Yak-11 trainer, entered production in 1946.
Specifications


- ASh-82
- Type: Two-row 14-cylinder air-cooled radial piston engine
- Displacement: 2,514 cubic inches (41.2 liters)
- Bore x Stroke: 6.1 in (155.5 mm) x 6.1 in (155 mm)
- Compression ratio: 7.05
- Nominal ground power: 1,150 hp at 2,400 rpm
- Takeoff power: 1,700 hp at 2,600 rpm
- Cruise power at 5,085 ft (1,550 m): 1,530 hp at 2,400 rpm
- Cruise power at 14,900 ft (4,550 m): 1,330 hp at 2,400 rpm
- Specific power: 0.68 hp/cubic inch (41.2 hp/liter)
- Specific fuel consumption: 0.627 lb/hp
- h (0.285 kg/hp
- h) at nominal ground power, 0.715 lb/hp
- h (0.325 kg/hp
- h) at takeoff power
- Weight: 1,914 lb (870 kg)
- ASh-21
- Type: Single-row 7-cylinder air-cooled radial piston engine
- Displacement: 1,257 cubic inches (20.6 liters)
- Compression ratio: 6.4
- Takeoff power: 700 hp at 2,300 rpm
- Ground power: 570 hp
- Cruise power at 5,577 ft (1,700 m): 615 hp
- Specific power: 0.56 hp/cubic inch (34.0 hp/liter)
- Weight: 1,071 lb (487 kg) Category:Aircraft piston engines Category:Russian and Soviet aircraft engines

Radial engine

The radial engine is a configuration of internal combustion engine, in which the cylinders are arranged pointing out from a central crankshaft like the spokes on a wheel. This configuration was formerly very commonly used in aircraft engines before being superseded by turboshaft and turbojet engines. The cylinders are connected to the crankshaft with a master-and-articulating-rod assembly. One cylinder has a master rod with a direct attachment to the crankshaft. The remaining cylinders' connecting rods have pinned attachments to rings around the edge of the master rod (see animation below). Four-stroke radials almost always have an odd number of cylinders, so that a consistent every-other-piston firing order can be maintained, providing smooth running. For aircraft use the radial has several advantages over the inline design. With all of the cylinders at the front of the engine (in effect), it is easy to cool them with airflow. Inlines require a cooling fluid to remove heat or complicated baffles to route cooling air, as the rear-most cylinders receive little airflow. Air cooling saves a considerable amount of complexity, and also reduces weight to some degree. In addition the radial is far more resistant to damage; if the block cracks on an inline that entire cylinder bank will lose power, but the same situation on a radial will often only make that individual cylinder stop working. These sorts of advantages – light weight and reliability – suggest that the radial layout is a natural fit for aircraft uses. However the radial design also has two important disadvantages. One is that any supply of compressed air (from a turbocharger or supercharger) has to be piped around the entire engine, whereas in the inline only one or two pipes are needed, each feeding an entire cylinder bank. The other disadvantage is that the frontal area of the radial is always much larger than the same displacement inline, meaning that the radial will often have greater drag. For a low-speed plane this is not very important, but for fighter aircraft and other high-speed needs, this was initially a "killer problem," but was mitigated significantly with the introduction of the NACA cowling in the late 1920s. The large frontal area combined with the durability of radial engines proved advantageous to fighter aircraft at times though, particularly those in the attack role where the engine would act as an additional layer of armor for the pilot. The debate about the merits of the radial vs. the inline continued throughout the 1930's, with both types seeing at least some use. The radial tended to be more popular largely due to its simplicity, and most navy air arms had dedicated themselves to the radial because of its improved reliability (very important when flying over water) and lighter weight (for carrier takeoffs). In the mid-1930s a new generation of highly streamlined high-speed aircraft appeared, along with more powerful inline engines like the Rolls Royce Merlin and Daimler-Benz DB 601. This re-opened the debate anew, with the needs of streamlining often winning out. However the Focke-Wulf Fw-190 and the Lavochkin La-5 and La-7 showed that a radial engine fighter could compete with the best of the inlines, given a proper installation. From that point on many new designs used radials, and after the war the inlines quickly disappeared from the now-smaller aircraft market. Originally radial engines had but one row of cylinders, but as engine sizes increased it became necessary to add extra rows. Most did not exceed two rows, but the largest radial engine ever built in quantity, the Pratt & Whitney Wasp Major, was a 28-cylinder 4-row radial engine used in many large aircraft designs in the post-World War II period. At least two companies build modern radials today: a 110 horse power 7 cylinder and 150 horse power 9 cylinder from Australia's Rotec Engineering and Gesoco Industries Inc. offers a 360 horse power 9 cylinder. See also


- Rotary engine
- Megola
External links


- [http://translate.google.com/translat...language_tools Radial engine motorcycles] Category:Aircraft piston engines Category:Piston engine configurations nb:Stjernemotor

Kind regards
Ross
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  #3  
Old 1st March 2007, 12:50
yogybär yogybär is offline
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Re: ASh82FN / La5FN-1943-Standard questions

Hm... nice link, but doesn't help really... anyway, I learnt that the ASh82F is a version of the ASh82 with unlimited usability of Forszah, which is good to know. Thanks so far, RossGMann!
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