Pyörremyrsky

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Pyörremyrsky
pyorremyrsky.png
Cockpit
BUY
AB
RB
SB
General characteristics
Brief
Detailed
3.7/4.3/4.3BR
Class
1 personCrew
3.31 tTake-off weight
2.6 kg/sBurst mass
Flight characteristics
11000 mCeiling
Daimler-Benz DB-605AEngine
InlineType
waterCooling system
Speed of destruction
790 km/hStructural
360 km/hGear
Offensive armament
20 mm MG 151 cannonWeapon 1
150 roundsAmmunition
750 shots/minFire rate
2 x 12.7 mm LKk/42 machine gunWeapon 2
600 roundsAmmunition
750 shots/minFire rate
Suspended armament
4 x 50 Kg Model 1938 bombSetup 1
4 x 100 Kg Model 1938 bombSetup 2
Economy
Sl icon.png4200/4800/3800Repair
10000 Sl icon.pngCrew training
160000 Sl icon.pngExperts
500 Ge icon.pngAces
142 × 2 Talisman.png % Rp icon.pngReward for battle
230 × 2 Talisman.png % Sl icon.png200 × 2 Talisman.png % Sl icon.png60 × 2 Talisman.png % Sl icon.png

Description

GarageImage Pyörremyrsky.jpg


The Pyörremyrsky is a premium gift rank III Swedish fighter with a battle rating of 4.3 (AB/RB) and 3.7 (SB). It was introduced in Update 1.93 "Shark Attack".

General info

Flight performance

Describe how the aircraft behaves in the air. Speed, maneuverability, acceleration and allowable loads - these are the most important characteristics of the vehicle.

Characteristics Max Speed
(km/h at 5,000 m)
Max altitude
(metres)
Turn time
(seconds)
Rate of climb
(metres/second)
Take-off run
(metres)
AB RB AB RB AB RB
Stock 597 580 11000 18.0 19.6 13.4 14.4 390
Upgraded 646 620 17.1 18.0 23.9 18.5

Details

Features
Combat flaps Take-off flaps Landing flaps Air brakes Arrestor gear
X X
Limits
Wings (km/h) Gear (km/h) Flaps (km/h) Max Static G
Combat Take-off Landing + -
790 360 460 460 260 ~13 ~6
Optimal velocities (km/h)
Ailerons Rudder Elevators Radiator
< 450 < 390 < 450 > 715
Compressor (RB/SB)
Setting 1
Optimal altitude 100% Engine power WEP Engine power
5,800 m 1,270 hp 1,778 hp

Survivability and armour

With this aircraft, you will need to strike hard and strike fast. You'll have to since the Pyörremyrsky only has one spar supporting each wing making it easy to rip them off or be blown off by cannon fire. Additionally, this aircraft doesn't have any protective glass in front of the pilot. Without the bulletproof glass, the pilot is extremely vulnerable when going into a head-on fight or when tailing a bomber trying to get a shot. Not only is the pilot put at risk when doing this, but also both the oil and liquid cooling system have a large chance of being destroyed since it does not have any protection.

  • 10 mm Steel - Pilot's seat
  • 10 mm Steel - Behind pilot
  • Self-sealing fuel tank (1 behind pilot)

Armaments

Offensive armament

The Pyörremyrsky is armed with:

  • 1 x 20 mm MG 151 cannon, nose-mounted (150 rpg)
  • 2 x 12.7 mm LKk/42 machine guns, nose-mounted (300 rpg = 600 total)

Suspended armament

The Pyörremyrsky can be outfitted with the following ordnance:

  • Without load
  • 4 x 50 kg Model 1938 bombs (200 kg total)
  • 4 x 100 kg Model 1938 bombs (400 kg total)

Usage in battles

Describe the tactics of playing in the aircraft, the features of using aircraft in a team and advice on tactics. Refrain from creating a "guide" - do not impose a single point of view, but instead, give the reader food for thought. Examine the most dangerous enemies and give recommendations on fighting them. If necessary, note the specifics of the game in different modes (AB, RB, SB).

Manual Engine Control

MEC elements
Mixer Pitch Radiator Supercharger Turbocharger
Oil Water Type
Not controllable Controllable
Auto control available
Controllable
Auto control available
Controllable
Auto control available
Separate Not controllable
1 gear
Not controllable

Modules

Tier Flight performance Survivability Weaponry
I Fuselage repair Radiator Offensive 12 mm
II Compressor Airframe Offensive 20 mm 50 kg
III Wings repair Engine New 12 mm MGs
IV Engine injection Cover New 20 mm cannons 100 kg
This is a premium vehicle: all modifications are unlocked on purchase

Pros and cons

Pros:

  • Very good climb rate, can outclimb even the Bf 109 G-2 to common combat altitude
  • Very effective armament, devastating German MG 151/20 and two 12.7 mm LKk/42
  • The two LKk/42s are very effective in pilot sniping
  • Good turn
  • Decent flaps
  • Barely any overheating

Cons:

  • Not very fast
  • Limited ammunition supply
  • Wings can be shot easily (only one spar per wing)

History

Pyörremyrsky, meaning hurricane, tornado or whirlwind in Finnish (pyörre > vortex/whirl, myrsky > storm), was the name of a Finnish fighter design at the end of WWII. Designed by Torsti Rafael Verkkola (1909-1977), the chief designer of Valtion lentokonetehdas (VL or 'State Aircraft Factory') and the designer of the previous Myrsky fighter and the Pyry trainer, the Pyörremyrsky was conceived as a domestic equivalent to the Messerschmitt Bf 109G.

Design

Conceptually, the Pyörremyrsky was very similar to the Bf 109G: it was powered by the same Daimler Benz DB605 engine and had a similar armament, consisting of one hub-mounted 20 mm MG 151/20 cannon and two 12,7 mm hood-mounted machine guns. However, the design was optimized for domestic production, making maximum use of wooden sub-assemblies, and crucially, unlike the Bf 109, it used a wing-mounted landing gear with a wide ground track, giving the design better handling on the ground.

Testing

Design and construction of the Pyörremyrsky met significant delays, and while the original tender called for a prototype to be ready in May of 1944, it wasn't until November 21st 1945 that the prototype was ready and made its first flight.

The prototype was designated PM-1. PM being its intended type designation and 1 being its airframe number. The designation PM is an abbreviation of Pyörremyrsky.

Flight trials of the Pyörremyrsky revealed some minor issues, but other than that, the design was very promising. Performance of the Pyörremyrsky was very similar to that of the Bf 109G, but it had a superior climbing speed and proved to be very agile. One major worry, however, was the quality of the glue used to bind the wooden components.

Fate

The end of the War saw Finland's military subjected to severe restrictions under the Moscow Armistice, which also called for a reduction of its forces. This limited the air force to only 60 fighter aircraft. As a result, the Pyörremyrsky became surplus before it even reached production as Finland chose to retain the Messerschmitt Bf 109G as its primary fighter for economical reasons. The last of the Finnish Bf 109 G's bowed out of service on March 13th 1954. The sole completed prototype of the Pyörremyrsky was put into storage after its last flight on July 22nd 1947, and stricken from the Finnish Air Force's inventory on April 1st 1953. Fortunately the prototype was preserved: it is now displayed at the Aviation Museum of Central Finland in Tikkakoski.

Legacy

Fortunately the Pyörremyrsky legacy continued even after the prototype was grounded. In 1948, construction started on a replacement of the VL Pyry trainer. The new design reused the wing design of the Pyörremyrsky in combination with a new fuselage. This aircraft, which was constructed by the successor of VL, Valmet, was named Vihuri (Gale) and first flew on February 6th 1951. The Vihuri prototype was designated VH-1, VH being an abbreviation of Vihuri.

After successful tests the Finnish air force ordered 30 aircraft on the 27 of Februari 1951. These were collectively called Vihuri sarja (series) II and carried the numbers VH-2 to VH-31. Series II were entered service in 1953 and this prompted the Finnish air force to order yet another 20 aircraft by autumn 1954. These aircraft were collectively called Vihuri series III and carried the numbers VH-32 to VH-51. All of series III were handed over to the Finnish air force on 15 January 1957.

Unlike the Pyörremyrsky the Vihuri was entirely constructed from metal. As a trainer it was a sound design, however it suffered badly in the engine department. The Vihuri design used old Tampere (Bristol) Mercury engines which had been recuperated from scrapped Bristol Blenheim bombers. These engines were already worn out by the time they were installed on the trainers which lead to a lot of breakdowns. After a string of fatal accidents the design was placed under severe suspicion and in March of 1957 all the Vihuri's were grounded after an accident was caused by structural failure. A subsequent inquest showed this particular accident as well as most of the previous ones were caused by pilots violating the flight safety regulations, taking the aircraft beyond its structural limitations. The Vihuri was returned to service in May of 1957, but following two further fatal accidents in 1959 the type was permanently grounded and stricken from the Finnish Air Force's inventory, with 31 out of 32 surviving airframes being sold for scrap; ironically it was outlasted in service by the Pyry (withdrawing in 1962), the design it was supposed to replace as a trainer. The sole surviving complete Vihuri is now displayed next to the sole surviving Pyörremyrsky at the Tikkakoski air force museum.

Media

Images
Videos

See also

Aircraft of comparable role, configuration and era

External links


Finnish State Aircraft Factory (Valtion Lentokonetehdas)
Fighters  Mörkö-Morane · Pyörremyrsky

Sweden-fighters
ASJA  J6B
Saab  J21A-1 · J21A-2 · A21A-3
FFVS  J22-A · J22-B
(Finland) VL  Mörkö-Morane · Pyörremyrsky
Foreign Import  J8A · Iacobi's J8A · J11 · J20 · J26

Sweden premium aircraft
Fighters  Iacobi's J8A · Pyörremyrsky · Mörkö-Morane
Jet fighters  J29D