1. Design and development

2. Operators (planned)

3. Specifications (planned)

4. References

5. See also

The LWS-7 Mewa II ("Seagull") was a Polish observation and close reconnaissance aircraft, designed in the 1939 by the LWS factory as a development of the earlier LWS-3 Mewa. Aircraft development was ordered by the Polish Air Force, but no prototypes were built.

Design and development

In 1939, the LWS-7 Mewa II was being developed at the LWS as the development of the LWS-3 Mewa. New wings and a semi-monocoque fuselage with less drag were introduced. It was to be fitted with a more powerful 916 hp (683 kW) PZL Pegaz XX engine (Bristol Pegasus XX) or a planned 1000 hp (750 kW) PZL Waran. A maximum speed of 400–420 km/h was estimated.

Before the war, only a wooden model for aerodynamics tests was made. Tests performed by Aerodynamic Institute of Warsaw University of Technology showed that the maximum speed of the LWS-7 could be estimated at 420–425 km/h - about 60 km/h more than the LWS-3 Mewa.

Complete technical drawings were prepared in Summer 1939 (still not confirmed) and the first prototype was planned to be built in Autumn 1939. First flight was planned in Spring or Summer 1940 and start of production was planned for Autumn/Winter 1940. The first production LWS-7 Mewa II would be handed over to Polish Air Force in early 1941. All these plans were halted due to the outbreak of World War II.

Drawings of LWS-7 were evacuated in September 1939 to the Polish embassy in Romania by the LWS director Aleksander Sipowicz. Many publications claim that they were handed over to Bulgarians, but it is not clear (possibly, it concerned the LWS-3B plans, in fact).

Operators (planned)

{{POL}}

• Polish Air Force

Specifications (planned)

|genhide=
|crew=2
|length m=9.5
|span m=13.45
|height m=2.65
|wing area sqm=26
|aspect ratio=
|airfoil=
|empty weight kg=1,750
|gross weight kg=2,420
|fuel capacity=
|more general=

|eng1 number=1
|eng1 name=PZL-Bristol Pegasus XX or PZL-Bristol Pegasus XIX
|eng1 type=9-cylinder air cooled radial piston engine
|eng1 hp=916
|prop blade number=3
|prop name=metal variable-pitch propeller
|prop dia m=
|prop dia ft=
|prop dia in=
|prop dia note=

|perfhide=
|max speed kmh=420
|max speed note= - {{convert|425|kph|kn mph|abbr=on}}
|max speed mach=
|cruise speed kmh=
|cruise speed mph=
|cruise speed kts=
|cruise speed note=
|stall speed kmh=
|stall speed mph=
|stall speed kts=
|stall speed note=
|never exceed speed kmh=
|never exceed speed mph=
|never exceed speed kts=
|never exceed speed note=
|minimum control speed kmh=
|minimum control speed mph=
|minimum control speed kts=
|minimum control speed note=
|range km=
|range miles=
|range nmi=
|range note=
|combat range km=
|combat range miles=
|combat range nmi=
|combat range note=
|ferry range km=
|ferry range miles=
|ferry range nmi=
|ferry range note=
|endurance=
|ceiling m=
|ceiling ft=
|ceiling note=
|g limits=
|roll rate=
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|climb rate ms=
|climb rate ftmin=
|climb rate note=
|time to altitude=
|sink rate ms=
|sink rate ftmin=
|sink rate note=
|lift to drag=
|wing loading kg/m2=
|wing loading lb/sqft=
|wing loading note=
|disk loading kg/m2=
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|disk loading note=
|fuel consumption kg/km=
|fuel consumption lb/mi=
|power/mass=
|thrust/weight=
|more performance=

|guns=2× fixed, forward-firing 7.92 mm KM Wz.36 machine guns, 1× rearward-firing 7.92 mm KM Wz.37 machine gun for the observer
|bombs=
|rockets=
|missiles=
|hardpoints=
|hardpoint capacity=
|hardpoint rockets=
|hardpoint missiles=
|hardpoint bombs=
|hardpoint other=
|avionics=
}}

References

See also

• Bacalhau à gomes de sá
• Bacalhau à Gomes de Sá
• Bacall
• Bacall (surname)
• Bacamarte
• Bacanora, Sonora
• Baca Ranch
• Bacardi 8
• Bacardi apple
• Bacardi Añejo
• Bacardi Big Apple
• Bacardi Black
• Bacardi Breezer
• Bacardi cocktail
• Bacardi Cóco
• Bacardi Grand Melon
• Bacardi Limón
• Bacardi O
• Bacardi Oro
• Bacardi Oro (Gold)
• Bacardi Razz
• Bacardi Superior
• Bacardi Vaníla
• Bacares
• Bacares, Almería