| 词条 | Lublin R-XVIII |
| 释义 |
The initial tri-motor R-VII was rejected along with all other proposals by Polish air manufacturers, as none were deemed skilled and experienced enough to build large, complicated bombers.[1] Because of that the newly created 2nd Destroyer Squadron of the 1st Air Regiment in 1926 was equipped with 32 Farman Goliath bombers bought in France.[1] However soon it became clear that the French bomber, designed in 1918, was already obsolete. Furthermore, the Goliaths were seriously underpowered and could not fly on one engine only, a serious flaw in a bomber.[3] Because of that the Department of Air of the Ministry of Military Affairs renewed interest in a home-produced heavy bomber.[3] The Lublin-based Plage i Laśkiewicz works presented in 1929 the Lublin R–XVIII, while Podlaska Wytwórnia Samolotów submitted PWS-22 and PWS-23.[3] The Lublin R-XVIII was in fact an upgraded and modified Lublin R-VII of 1924,[3] utilising some of Rudlicki's concepts used in his 1922 "Project d'avion Ru - type chassis pliant" passenger plane design submitted as his doctoral thesis at the Ecole Nationale Supérieure d'Aéronautique in Paris in 1922.[4] A high-wing trimotor biplane of mixed construction, the aeroplane was to be powered by three radial engines of {{convert|485|kW|hp}} each and be able to deliver up to {{convert|1500|kg|lb}} of bombs.[3] One of the major modifications was the Rudlicki's own patented v-tail and a possibility to use a retractable landing gear, a novelty in the 1920s.[3] Like its predecessor, the new plane was to have strong defensive armament and a crew of 6.[3] In line with Giulio Douhet's theories, the plane was to be a "flying fortress", able to defend itself without the need for escort fighters.[4] Because of that the machine gun field of fire covered 98% of the sphere around the bomber.[4] While superior to contemporary French-made bombers, the project was far from ready and the ministry decided that before serial production could commence, the design would already be outdated.[3] Because of that in 1928 it ordered a Fokker F–VII B/3m bomber to be produced at Plage i Laśkiewicz works instead.[3] As an alternative to the Fokkers, in 1930 Jerzy Rudlicki restarted works on his design and by 1932 created a modified version, with only two radial engines and a payload of {{convert|1000|kg|lb}} of bombs.[3] However, the redesigned Lublin R-XVIII was rejected as well and none were ever built.[3] Likewise the PWS-22 and PWS-23 were also rejected and eventually the unsuccessful LWS-6 Żubr was chosen as an interim design before the modern PZL.37 Łoś could be introduced in the 1930s.[4] Specifications (R-XVIII - trimotor version){{aircraft specifications|plane or copter?=plane |jet or prop?=prop |ref=[3] |crew=6 |payload main=1500 kg |payload alt=3,300 lb |length main=13 m |length alt=43 ft |span main=18 m |span alt=59 ft |height main=4.2 m |height alt=14 ft|area main=170 m2 |area alt=1800 sq ft |max takeoff weight main=4000 kg |max takeoff weight alt=8800 lb |type of prop=radial engine |number of props=3 |power main=485 kW |power alt=650 hp |max speed main=260 km/h |range main=1050 km |range alt=650 mi |armament=9 x machine guns (2x2 in nose and tail turrets, 1 in each engine gondola and 2 in ventral mount) |avionics= }} References1. ^1 2 {{cite web | author= | title=Samoloty firmy Plage&Laśkiewicz | publisher=Jura-Pilica | year= | work=www.jura-pilica.com | url=http://www.jura-pilica.com/?samoloty-firmy-plagelaskiewicz,532 | accessdate=2013-07-02 |language=pl}} 2. ^{{cite book|author1=Jerzy B. Cynk|title=Polish Aircraft 1893–1939|year=1971|publisher=Putnam|location=London|isbn=0-370-00085-4}} 3. ^1 2 3 4 5 6 7 8 9 10 11 {{cite web | author=Janusz Dołęga | editor=Monika Śliwińska | title=Samoloty firmy Plage i Laśkiewicz | publisher=Ośrodek Brama Grodzka | location=Lublin | year= | work=Leksykon Lublin | url=http://teatrnn.pl/leksykon/node/537/samoloty_firmy_plage_i_la%C5%9Bkiewicz#12 | accessdate=2013-07-02 |language=pl}} 4. ^1 2 3 {{cite encyclopedia |author=Krzysztof Luto |editor= |encyclopedia=Samoloty w Lotnictwie Polskim |title=Lublin R-XVIII, 1929-1932 |url=http://www.samolotypolskie.pl/samoloty/1697/126/Lublin-R-XVIII2 |edition= |year=2010 |publisher= |volume= |location=Suwalki |id= |pages= |language=pl}} See also{{aircontent||related=
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|see also= }}{{Lublin aircraft}} 2 : Polish bomber aircraft 1920–1929|Lublin aircraft |
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