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Poland's FlagPoland Air Force's marking

Poland's PZL P.37, PZL P.37 B, medium bomber
Nickname: Los (elk)

Photos

PZL P.37 Los bomber:
Poland's PZL P.37 Los bomber

Design

The PZL P.37 Los was an exceptional bomber for its time and attracted much foreign interest before World War II started.1,2 The P.37 was designed in 1934.1,2

The PZL P.37 was made from metal.2

Landing Gear

The landing gear of the PZL P.37 was retractable.2

Prototype

A contract for three prototypes was placed in 1935.1

The P.37/I prototype first flew in June 1936.1,2

Production

  • Prototypes: 31
  • PZL P.37A: 101
  • PZL P.37Abis: 201
  • PZL P.37B: ~701
  • Total: 1002, ~1031
    • Manufacturer: Pantswowe Zaklady Lotnicze (PZL)2

Variants

  • PZL P.37/I: Prototype.1 Had two Pegasus XII engines.1 Single fin.1
  • PZL P.37/II: Prototype.1 Had two Pegasus XX engines.1 Single fin.1
  • PZL P.37/III: Prototype.1 Had two Gnome-Rhône engines.1 Double fin and rudder.1
  • PZL P.37A: Had a single fin.1 Deliveries started in spring 1938.2
  • PZL P.37Abis: Had twin fins.1
  • PZL P.37B: Canopy was revised.1 Undercarriage now had twin wheels.1 Entered service in late 1938.1,2
  • PZL P.37C: To fill foreign orders.1 Had two Gnome-Rhône engines.1
  • PZL P.37D: To fill foreign orders.1 Had two Gnome-Rhône engines.1
  • PZL P.49 Mi (teddy bear): Prototype.1 Had 1,200 - 1,600 HP engines.1 Prototype was under construction when Germans invaded.1

Usage

Poland and Romania used the PZL P.37 Los.1

Public Appearances

In 1938 the PZL P.37 was shown at the Belgrade Air Show and the Paris Salon.2

Orders

The P.37C and P.37D were ordered by:

  • Bulgaria: 151
  • Romania: 301
  • Turkey: 101
  • Yugoslavia: 201

These were to be delivered in June 1940 but World War II started well before then.1

Defense of Poland

There were approximately 362 / 45 operational P.37s when Germany invaded.1 Over the next two weeks 26 were destroyed.1

The survivors were evacuated to Romania and were used by the Romanian Air Force on the Eastern Front.1

After World War II

Several P.37s survived the war with the Romanians and were used as target tugs into the late 1950s.1

Specifications

  PZL P.37 Los1
Type Medium bomber1
Crew 41
Engine (Type)  
Cylinders  
Cooling  
Net HP  
Propeller blades  
Dimensions  
Span 58' 11"1
17.96 m1
Length 42' 4.5"1
12.91 m1
Height 16' 8"1
5.08 m1
Wing area  
Weight  
Empty  
Loaded  
Performance  
Speed  
Climb  
Service ceiling  
Range  
Armament  
Nose 1: 7.7 mm MG1
Dorsal 1: 7.7 mm MG1
Ventral 1: 7.7 mm MG1
Bombs 9,436 lb1
4,280 kg1
  PZL P.37A Los1
Type Medium bomber1
Crew 41
Engine (Type) 2: PZL (Bristol) Pegasus XIIB1
Cylinders Radial 91
Cooling  
Net HP 875 each1
Propeller blades 3 each1
Dimensions  
Span  
Length  
Height  
Wing area  
Weight  
Empty  
Loaded  
Performance  
Speed  
Climb  
Service ceiling  
Range  
Armament  
  PZL P.37B Los1, PZL P.37 B2
Type Bomber2, Medium bomber1
Crew 41,2
Engine (Type) 2: PZL Pegasus XX1
2: PZL-Bristol Pegasus XIIB2
Cylinders Radial 92
Cooling  
Net HP 873 each2, 925 each1
Propeller blades 3 each1
Dimensions  
Span 58' 10"2
Length 42' 5"2
Height 16' 8"2
Wing area  
Weight  
Empty 9,436 lb1
4,280 kg1
Loaded 19,621 lb1, 19,680 lb2
8,900 kg1
Performance  
Speed @ 11,154' 276 mph2
Speed @ 11,155' /
3,400 m
277 mph1
445 kph1
Climb  
Service ceiling 19,680'2, 19,685'1
6,000 m1
Range 932 miles2
Maximum range 2,796 miles1
4,500 km1
Range with 4850 lb /
2,200 kg load
932 miles1
1,500 km1
Armament 3: MG2
Bombs 5,688 lb2

Sources:

  1. Aircraft of WWII, Stewart Wilson, 1998
  2. World War II Airplanes Volume 1, Enzo Angelucci, Paolo Matricardi, 1976
20th Century American Military History Crucial Site