Birch Gun

Birch Gun

UK | SPG | Tier IV

Battle Tier

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Overview
Mouse over "

▲

Well, the ones further down, of course.

" for more information
[Client Values; Actual values in

▲

Specifically, the mismatch in crew values caused by commander's 10% crew skill bonus. Outside of a crew of 1 commander only, 100% crew is a fiction. The client values, given for 100% crew, will normally be taken into battle with 110% crew skill members aside from specific functions, causing their actual performance to deviate from the expected client value. These differences are taken into account in tooltip boxes.

]

152,000   Cost

190190 HP Hit Points

12.1/12.212.15/14.2 t Weight Limit

Crew

Commander (Radio Operator)
Gunner
Gunner
Driver
Loader
Loader

Mobility

90110 hp Engine Power

45 km/h Speed Limit

1618 deg/s Traverse

7.449.05 hp/t Power/Wt Ratio

?? Pivot

Armor

6/6/6 mm Hull Armor

Armament

Shells

Shell Cost

195-325210-350 HP Damage

32-5333-55 mm Penetration

6.82100% crew: ? rpm + Vents: ? rpm + BiA : ? rpm + Food: ? rpm 6.25100% crew: ? rpm + Vents: ? rpm + BiA : ? rpm + Food: ? rpm Rate of Fire

Damage Per Minute

0.74100% crew: ? m + Vents: ? m + BiA : ? m + Food: ? m 0.72100% crew: ? m + Vents: ? m + BiA : ? m + Food: ? m Accuracy

5100% crew: ? s + Vents: ? s + BiA : ? s + Food: ? s 5100% crew: ? s + Vents: ? s + BiA : ? s + Food: ? s Aim time

16100% crew: ? deg/s + Vents: ? deg/s + BiA : ? deg/s + Food: ? deg/s 16100% crew: ? deg/s + Vents: ? deg/s + BiA : ? deg/s + Food: ? deg/s deg/s Gun Traverse Speed

360° Gun Arc

-5°/+37.5°-5°/+37.5° Elevation Arc

150150 rounds Ammo Capacity

General

2020 % Chance of Fire

340100% crew: ? m + Vents: ? m + BiA : ? m + Food: ? m 340100% crew: ? m + Vents: ? m + BiA : ? m + Food: ? m View Range

400100% crew: ? m + Vents: ? m + BiA : ? m + Food: ? m 550100% crew: ? m + Vents: ? m + BiA : ? m + Food: ? m Signal Range

Values are Stock - click for TopValues are Top - click for Stock

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The GB26_Birch_Gun is an British tier 4 self-propelled gun.

The first SPG originally designed in Great Britain. Development started in 1923. The prototype was built on the basis of the Vickers Medium Mark II in 1925. A few prototypes were manufactured, and underwent trials starting in 1925. The project was canceled in 1928 due to lack of interest by the British government.

The GB26_Birch_Gun leads to the Bishop.

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Modules

Tier Name Ammo Damage Penetration Shell Price Rate of Fire Accuracy Aim Time Elevation XP Cost Price Weight 03III Q.F. 18-Pr. 150 260/170 HP 42/65 mm 72 /56 6.82100% crew: ? rpm + BiA : ? rpm + Food: ? rpm r/m 0.74100% crew: ? m + BiA : ? m + Food: ? m m 5100% crew: ? s + BiA : ? s + Food: ? s s -?°/+?° --- 10,50010,500 0457 457 kg 04IV Q.F. 25-Pr. Gun/How. 150 280/180/180 HP 44/92/71 mm 83 /7 /83 6.25100% crew: ? rpm + BiA : ? rpm + Food: ? rpm r/m 0.72100% crew: ? m + BiA : ? m + Food: ? m m 5100% crew: ? s + BiA : ? s + Food: ? s s -?°/+?° 2,250 28,50028,500 0510 510 kg

---

Tier Name Power Fire Chance Type XP Cost Price Weight 01I Armstrong Siddeley V8 0090 90 hp 020 20 % Gasoline --- 0--- 0200 200 kg 01I Armstrong Siddeley V8 SC 0110 110 hp 020 20 % Gasoline 35 000000350350 0200 200 kg

---

Tier Name Load Limit Traverse Speed XP Cost Price Weight 03III Birch Gun Mk. I 12.212.2 t 01616 d/s ------ 2,0002,000 6,000 6,000 kg 04IV Birch Gun Mk. II 14.214.2 t 01818 d/s 1,1001,100 4,6504,650 6,000 6,000 kg

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Tier Name Range XP Cost Price Weight 06VI WS No. 19 Mk. I 400100% crew: ? m + BiA : ? m + Food: ? m 400100% crew: ? m + BiA : ? m + Food: ? m m 0--- --- 15,00015,000 0040 40 kg 07VII WS No. 19 Mk. II 450100% crew: ? m + BiA : ? m + Food: ? m 450100% crew: ? m + BiA : ? m + Food: ? m m 3,600 3,600 21,00021,000 0040 40 kg 08VIII WS No. 19 Mk. III 550100% crew: ? m + BiA : ? m + Food: ? m 550100% crew: ? m + BiA : ? m + Food: ? m m 4,000 4,000 22,00022,000 0040 40 kg

Compatible Equipment

         

Compatible Consumables

         

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Birch Gun

UK | SPG | Tier IV

Battle Tier

1234567891011

Overview
Mouse over "

▲

Well, the ones further down, of course.

" for more information
[Client Values; Actual values in

▲

Specifically, the mismatch in crew values caused by commander's 10% crew skill bonus. Outside of a crew of 1 commander only, 100% crew is a fiction. The client values, given for 100% crew, will normally be taken into battle with 110% crew skill members aside from specific functions, causing their actual performance to deviate from the expected client value. These differences are taken into account in tooltip boxes.

]

152,000   Cost

29058 HP Hit Points

12.1/12.27.05/14.2 t Weight Limit

Crew

1. Commander (Radio Operator)
2. Gunner
3. Gunner
4. Driver
5. Loader
6. Loader

Mobility

90110 hp Engine Power

45/10 km/h Speed Limit

1618 deg/s Traverse

7.4415.6 hp/t Power/Wt Ratio

YesYes Pivot

Armor

// mm Hull Armor

Armament

{{#ifeq:|ARMOR_PIERCING|| {{#ifeq:|ARMOR_PIERCING|| HE {{#ifeq:|ARMOR_PIERCING|| {{#ifeq:|ARMOR_PIERCING|| HE Shells

72/0 83/0 Shell Cost

260//280// HP Damage

21//22// mm Penetration

| |}} | |}} 6.82 r/m  ▲ Standard Gun Reload Times Nominal: 8.8 s 50% Crew: 10.9 s 75% Crew: 9.52 s 100% Crew: 8.44 s Rammer: 7.6 s Vents: 8.25 s Both: 7.43 s Both and BiA: 7.27 s Both and Max Crew %: 6.97 s See Crew, Consumables, or Equipment for more information. | |}} | |}} 6.25 r/m  ▲ Standard Gun Reload Times Nominal: 9.6 s 50% Crew: 11.89 s 75% Crew: 10.38 s 100% Crew: 9.2 s Rammer: 8.28 s Vents: 9 s Both: 8.1 s Both and BiA: 7.92 s Both and Max Crew %: 7.59 s See Crew, Consumables, or Equipment for more information. Rate of Fire

| |}} | |}} 1773.2 ▲ Standard Gun Using Shell Type 1 (260 Damage): With wholly penetrating hits Theoretical Damage Per Minute Nominal DPM: 1773.2 50% Crew: 1432.6 75% Crew: 1640.6 100% Crew: 1848.6 100% Crew Vents: 1890.2 Rammer: 2054 Both: 2100.8 Both and BiA: 2147.6 Both and Max Crew %: 2238.6 Advantageous Damage Per Minute First-shot DPM: 2033.2 50% Crew: 1692.6 75% Crew: 1900.6 100% Crew: 2108.6 100% Crew Rammer: 2314 Vents: 2150.2 Both: 2360.8 Both and BiA: 2407.6 Both and Max Crew %: 2498.6 See here, here, or here for more information. | |}} | |}} 1750 ▲ Standard Gun Using Shell Type 1 (280 Damage): With wholly penetrating hits Theoretical Damage Per Minute Nominal DPM: 1750 50% Crew: 1414 75% Crew: 1618.4 100% Crew: 1825.6 100% Crew Vents: 1867.6 Rammer: 2027.2 Both: 2074.8 Both and BiA: 2119.6 Both and Max Crew %: 2212 Advantageous Damage Per Minute First-shot DPM: 2030 50% Crew: 1694 75% Crew: 1898.4 100% Crew: 2105.6 100% Crew Rammer: 2307.2 Vents: 2147.6 Both: 2354.8 Both and BiA: 2399.6 Both and Max Crew %: 2492 See here, here, or here for more information. Damage Per Minute

| |}} 0.74 m  ▲ With 50% Crew: 0.917 m With 75% Crew: 0.8 m With 100% Crew: 0.71 m With BiA: 0.694 m With BiA and Vents: 0.679 m Maximum possible: 0.651 m For more details, see Crew | |}} 0.72 m  ▲ With 50% Crew: 0.892 m With 75% Crew: 0.779 m With 100% Crew: 0.69 m With BiA: 0.675 m With BiA and Vents: 0.66 m Maximum possible: 0.633 m For more details, see Crew Accuracy

| |}} 5 s  ▲ With 50% Crew: 6.194 s With 75% Crew: 5.408 s With 100% Crew: 4.794 s With GLD: 4.358 s With BiA: 4.689 s With BiA and Vents: 4.587 s With both and GLD: 4.17 s Maximum possible: 3.997 s For more details, see Crew or Equipment | |}} 5 s  ▲ With 50% Crew: 6.194 s With 75% Crew: 5.408 s With 100% Crew: 4.794 s With GLD: 4.358 s With BiA: 4.689 s With BiA and Vents: 4.587 s With both and GLD: 4.17 s Maximum possible: 3.997 s For more details, see Crew or Equipment Aim time

1616 deg/s Gun Traverse Speed

360° Gun Arc

-5°/+38°-5°/+70° Elevation Arc

265265 rounds Ammo Capacity

General

2020 % Chance of Fire

265 m  ▲ With 50% Crew: 208.2 m With 75% Crew: 236.6 m With 100% Crew: 265 m With Recon and Situational Awareness: 278.4 m With Coated Optics: 291.5 m With Binocular Telescope: 331.25 m Maximum possible: 379.4 m For more details, see Skills or Equipment 265 m  ▲ With 50% Crew: 208.2 m With 75% Crew: 236.6 m With 100% Crew: 265 m With Recon and Situational Awareness: 278.4 m With Coated Optics: 291.5 m With Binocular Telescope: 331.25 m Maximum possible: 379.4 m For more details, see Skills or Equipment View Range

| |}} 400 m  ▲ With 50% Crew: 314.3 m With 75% Crew: 357.2 m With 100% Crew: 400 m With 100% Signal Boost: 480 m When affected by 100% Relaying: 440 m Maximum possible: 575.6 m For more details, see Skills or Equipment | |}} 550 m  ▲ With 50% Crew: 432.1 m With 75% Crew: 491.1 m With 100% Crew: 550 m With 100% Signal Boost: 660 m When affected by 100% Relaying: 605 m Maximum possible: 791.4 m For more details, see Skills or Equipment Signal Range

Values are Stock - click for TopValues are Top - click for Stock

Birch Gun

IV

152000

The Birch Gun is a British tier 4 self-propelled gun.

In the 1920s, British engineers explored the idea of an SPG on a tank chassis. Development of the vehicle started in 1923 at the Royal Arsenal, Woolwich. It was based on the Vickers Medium Mark II, the chassis of which could carry the required modules. A total of seven prototypes were manufactured from 1926 through 1927 and joined the Experimental Mechanised Force established on May 1, 1927. Later, the unit was disbanded, along with the SPG program.

The Birch Gun marks the end of its British self-propelled gun line.

Modules / Available Equipment and Consumables

Modules

Guns

Tier	Gun	Penetration (mm)	Damage (HP)	Rate of fire (rounds/minute)	Dispersion (m/100m)	Aiming time (s)		Weight (kg)	Price ()
IV	Q.F. 25-Pr. Gun/How.	22	280	6.25	0.72	5		510	28500
III	Q.F. 18-Pr.	21	260	6.82	0.74	5		457	10500

Engines

Tier	Engine	Engine Power (hp)	Chance of Fire on Impact (%)		Weight (kg)	Price ()
I	Armstrong Siddeley V8	90	20		200	0
I	Armstrong Siddeley V8 SC	110	20		200	350

Suspensions

Tier	Suspension	Load Limit (т)	Traverse Speed (gr/sec)	Rmin		Weight (kg)	Price ()
III	Birch Gun Mk. I	12.2	16	0		6000	2000
IV	Birch Gun Mk. II	14.2	18	0		6000	4650

Radios

Tier	Radio	Signal Range (m)		Weight (kg)	Price ()
VII	WS No. 19 Mk. II	450		40	21000
VI	WS No. 19 Mk. I	400		40	15000
VIII	WS No. 19 Mk. III	550		40	22000

Compatible Equipment

        

Compatible Consumables

                    

Player Opinion

Pros and Cons

Pros:

• Can rotate its gun 360 degrees, like the SU-26
• Huge gun arc, comparable to Soviet artillery
• Massive ammo capacity
• Accuracy is better than it's predecessors

Cons:

• Weak armor
• Low alpha damage
• Open top, which means it's vulnerable to crew and module damage
• Large silhouette

Gallery

• 

  Birch Gun front left view

• 

  Birch Gun front right view

• 

  Birch Gun rear left view

• 

  Birch Gun rear right view

Historical Info

The Birch Gun was the world's first practical self-propelled artillery gun, built at the Royal Arsenal, Woolwich in 1925. The gun was never highly regarded by the British High Command, purely for prejudicial beliefs and political pressure rather than any real lack of ability.[1] Named after General Sir Noel Birch, who was Master General of Ordnance at the time, the Birch gun had real potential. It was built upon a Vickers Medium Mark II tank chassis and mated originally with the QF 18 pdr (83.8 mm) gun then with a 75 mm field gun. The project was abandoned in 1928 after political pressure killed off any plans to complete the third version of this weapon.

Development history

The initial prototype, the Mark I, made its first appearance in January 1925 and spent the next year undergoing trials and taking part in manoeuvres, mainly with 28 Battery, 9th Field Brigade, Royal Artillery. The lone Mark I was transferred to 20 Battery, 9th Field Brigade RA, who then took delivery of three Mark II Birch Guns in July 1926, followed by a fourth gun in September. This brought the battery strength to five guns, which participated in various field exercises as part of the Experimental Mechanised Force and it successor, the Experimental Armoured Force which was dispersed in February 1929. All five guns were finally withdrawn in June/July 1931, effectively ending the British Army's experiments with tracked self-propelled guns until the advent of various hurriedly improvised vehicles during the Second World War, such as the Bishop, and the Deacon. Two Mark III Birch Guns were produced, but never issued to serving units. These had the guns mounted in revolving barbette-style turrets that increased crew protection but reduced the guns' elevation, so capping their effective range. The armament for the original Birch Gun consisted of an Ordnance QF 18 pounder field gun (3.3 inch, 84 mm). This was changed to the 75 mm gun on the Birch gun Mk II and from then on was able to be fired either at ground targets or in the air-defence role, being given a much higher rate of elevation to be fired at enemy aircraft. The Armstrong Siddeley engine was modestly powerful. Being only 8 cylinders it could manage 90 hp for a mild 45 km/h top-speed. However, for its time (late 1920s) it was quite fast.

The Birch gun was tested as part of the Experimental Mechanised Force in the 1920s. The Force undertook various experiments in mechanized warfare combining tanks and infantry with their own transport. The project was finally abandoned in 1928 after major political pressure cancelled all plans to complete the third version of this weapon.

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UK

Self-Propelled Guns

ja:Tank:GB26 Birch Gun

British Tanks

Self-Propelled Guns