McClean (37 mm rychlopalný kanon)

1-pdr fully automatic cannon McClean
Quick-firing cannon of McClean's 37 calibre


Other known but incorrect name variants: McLean, MacLean, Maklina, Puska-Maklen, пушка Малена.


Brief history - in progress - please bear with me for a moment.


Development ...
Russia ...
Legion and BM Rcs ...


According to surviving documents, 7 McClean cannons arrived from Siberia. The Czechoslovak military administration took them into their armament and used two names for their designation:
- the distorted name: Maklina cannon
- or the corrupted American name: Mclean


I assume that the McClean guns were used for training in the 1920s and then were transferred to the "reserve". Five pieces were retained by the VS in its deposits and two pieces went into the collections of the newly established Liberation Memorial in Žižkov.


In 1938, the Czechoslovak Armed Forces used 5 McClean guns to arm a company of escort guns of Frontier Battalion No. 50. The guns were to be used until the American ammunition was used up. Then they were to be replaced by more modern ones. Border Battalion No. 50 was established on 15 July 1938 in Bratislava and was intended to fight in the fortified area of Petržalka. The further fate of these five guns is unknown.


The same interesting fate befell the exhibits of the Liberation Memorial. Both survived the war unscathed in the depositories of the museum closed by the Germans and after the war became part of the collections of the military museum. At present, the Military History Institute owns only one incomplete piece - exhibit 5791. The second cannon is said to have been scrapped in an unspecified year.


ZTD
- gun calibre: 37 mm
- weight of the weapon: 303,837 kg (18 poods, 22 lbs)


- barrel length: 1850 mm, d/50
- Barrel length with threaded barrel: 1565 mm
- barrel weight: 44,597 kg (2 poods, 29 lbs)
- weight of gun body (upper receiver ?): 81,896 kg (5 poods)
- Sight: 9° (± 4° 30')
- Bearing: -5° to +15°
- barrel height: 762 mm


Lafette
- weight of the baton: 139,607 kg (8 poods, 21 lb)
- Shield weight: 34,78 kg (2 poods, 27 lbs)
- Wheel diameter: 1041 mm
- Wheel hoop width: ~41 mm
- Wheel base: 1207 mm


Ammunition:
- 37x137R mm
- muzzle velocity: 650 m/sec.
- 152 MPa (1500 atm.)
- Target range: 3200 m (3 versts)
- Max. range at 15° elevation: 5334 m (5 versts)
- rate of fire: 50 to 100 rounds per minute


Sights
- single with manually adjustable sight (crosshairs) and reticle


Sources
Samuel N. McClean of Cleveland, Ohio: Gun-Carriage, US Patent No. 862 502, 1907
J. Jedlička, Lt.: 37 mm Maklina rapid-fire gun, maintenance and service manuscript, edition Military Library of the 2nd Rifle Regiment of George of Poděbrady, year of writing ca. 1920
George M. Chinn: The Machine Gun, vol. 1, Bureau of Ordnance, Department of the Navy, USA 1951
Aljeksandr B. Shirokorad: Enciklopjedija otječjestjestvjennoj artilljerii, ed. Charvjest, Minsk 2000, ISBN 985-1337030
Ian V. Hogg: Machine Guns - 14th Century to Present, Krause Publications, USA 2002, ISBN 978-0873492881
James H. Willbanks: Machine Guns, ed. ABC-Clio, Santa Barbara 2004, ISBN 1-85109-485-7
Jiří Fidler, Václav Sluka: Encyklopedie branné moci Republiky československé 1920-1938 (Encyclopaedia of the Defence Forces of the Czechoslovak Republic 1920-1938), publisher. Libri, Prague 2006, ISBN 978-8072772568
Jiří Janoušek: Notes on the armament of legionary trains, manuscript from about 2008


Internet
http://armada.vojenstvi.cz/predvalecna/cisla/6.htm
http://artilleria.net.ru/03/37_1916/index.html
brannamoc1938garda.webnode.cz
http://ww1.milua.org/R37Macleana.htm
www.archivingindustry.com
http://www.converter.cz/prevody/hmotnost.htm
www.greatwardifferent.com
http://www.municion.org/37x137R/37x137R.htm
www.network54.com-
http://www.quarry.nildram.co.uk/ammotable5.htm
McClean (37 mm rychlopalný kanon) -


McClean (37 mm rychlopalný kanon) -


McClean (37 mm rychlopalný kanon) -


URL : https://www.valka.cz/McClean-37-mm-rychlopalny-kanon-t110234#388670 Version : 0
A few pictures of this interesting happening, the photos are from the exhibition about the CZECHOSLOVAK legion from the year 2004.

Source: Own photo.
McClean (37 mm rychlopalný kanon) - celkový pohled

celkový pohled
McClean (37 mm rychlopalný kanon) - pohled zezadu

pohled zezadu
McClean (37 mm rychlopalný kanon) - pohled na zásobník pro náboje

pohled na "zásobník" pro náboje
McClean (37 mm rychlopalný kanon) - pohled zepředu

pohled zepředu
URL : https://www.valka.cz/McClean-37-mm-rychlopalny-kanon-t110234#388688 Version : 0
VHÚ 30.9.12, own photo
McClean (37 mm rychlopalný kanon) -


McClean (37 mm rychlopalný kanon) -


McClean (37 mm rychlopalný kanon) -


McClean (37 mm rychlopalný kanon) -


McClean (37 mm rychlopalný kanon) -


McClean (37 mm rychlopalný kanon) -


McClean (37 mm rychlopalný kanon) -


McClean (37 mm rychlopalný kanon) -


McClean (37 mm rychlopalný kanon) -


McClean (37 mm rychlopalný kanon) -


URL : https://www.valka.cz/McClean-37-mm-rychlopalny-kanon-t110234#457490 Version : 0

Diskuse

37x137R US Navy 1 pdr - 37x136R Heavy one pounder

A brief history of the
The US Navy used this ammunition already ahead of PSV on board ships and for coastal defence. The owner and designer of the cleveland firm of McClean Arms & Ordnance Company for this charge suggested to the 37 mm like shotgun cannon.

The designation of the dimensions of the ammunition is known in two variants: 37x136R and 37x137R. Depending on whether the length was rounded up, or down. The actual length of the cartridge: 136,5 mm.

Resources
http://ww1.milua.org/mcLeanammo.htm
http://www.municion.org/37x137R/37x137R.htm
http://www.quarry.nildram.co.uk/ammotable5.htm.
McClean (37 mm rychlopalný kanon) -


McClean (37 mm rychlopalný kanon) -


McClean (37 mm rychlopalný kanon) -


URL : https://www.valka.cz/McClean-37-mm-rychlopalny-kanon-t110234#388731 Version : 0
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