L.W.S. 6 Zubr
1936
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L.W.S. 6 Zubr

Built as a low-risk back-up to the advanced PZL P.37 Los, the LWS Zubr (Bison) bomber had its origin in a design for an airliner that the Polish national airline had rejected as too old-fashioned. Unlike the all-metal Los, the Zubr was built of all sorts of materials. As production began, engines were changed from 336kW (450hp) Twin Wasps to 507kW (680hp) Bristol Pegasuses, which caused different stresses on the airframe. Many weaknesses soon became apparent and cracks were dealt with by fixing on wooden patches. Inevitably the prototype fell apart, unfortunately while carrying prospective Romanian purchasers. The 'improved' LWS.6 with the same engines and a twin tail weighed more because of its extra strengthening so much more that they were unable to carry bombs. The Luftwaffe put the survivors into use as unarmed trainers.

3-View 
L.W.S. 6 ZubrA three-view drawing (800 x 271)


Specification 
 CREW4
 ENGINE2 x 680hp Bristol Pegasus VIII piston engines
 WEIGHTS
    Take-off weight6865 kg15135 lb
 DIMENSIONS
    Wingspan18.52 m61 ft 9 in
    Length15.39 m51 ft 6 in
    Height4.00 m13 ft 1 in
 PERFORMANCE
    Max. speed380 km/h236 mph

Comments
Tom Griffith, 31.08.2015

Given that all four of my mom's grandparents were born in Poland and emigrated to the US in the late 19th Century, I'm half-Polish. That being said, this aircraft DOES look like something cobbled together by the "Little Rascals."

Klaatu83, 21.07.2015

There is an old adage about airplanes that runs, "if it looks right it will usually fly right". This was one of the worst combat aircraft of it's day, and looks it.

, 17.06.2011

air max

Pedro_Vial, 12.12.2009

You've missed the LWS 3 Mewa, a very intersting recon and military transport aircraft. you can search it on youtube, there is a very good video about it.
Sorry for my english, its rusty

Sgt.KAR98, 19.02.2008

This plane looks more interesting than the PZL Los.

William Luther Jr., 04.10.2007

I have a photo of one wrecked in a Germam air raid in 1939 from a book on the Polish air force 1919-1945 called "White Eagles" and it looks like something children would build out of scrap or something from the old "Little Rascals" serials!

Milo, 25.09.2007

Correct spellings of polish names are "ubr" ("" should be pronounciated just like french "j") and "o" - "Elk" or "Moose" ("" - like "w" in the word "world", and "" - softened "sh" like in japanese "sushi" but contracted, without "i" at the end).

mort_faucheur, 19.08.2007

'Bison', a very apt nickname for this plane. It looks almost as hideous as the French heavy bombers of the 1930s.

Crazy_Ivan, 21.07.2007

As has been written, Zubr was a back-up for Los. But in fact there were more of them on polish airports. Unfortunately most of them were destroyed by German bombers in first days of war. The surviving machines was unarmed an in this way useless.

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FACTS AND FIGURES

The prototype LWS.6 had a stronger twin-finned tail, but it was heavier than the original single-finned unit, which was refitted to the production models.

The mixed construction of the Zubr included partly metal stressed skin, steel tube with fabri covering, fabric-covered metal, and just wood.

The undercarriage retraction motors were not powerful enough to raise the landing gear and the gear units were eventually locked in the down position.

The pilot's canopy was mounted above the flat-topped fuselage and offset to the left side. There was a dorsal gun turret as well as a twin turret above the bombaimer's glazed nose.



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