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Blohm and Voss Bv Ha 137

Nazi Germany (1935)
Picture of Blohm and Voss Bv Ha 137 Dive Bomber / Ground Attack Aircraft Prototype
Picture of Blohm and Voss Bv Ha 137 Dive Bomber / Ground Attack Aircraft Prototype

The Blohm and Voss Ha 137 was a pre-World War 2 German attempt at an effective dive bomber and ground attack platform - only six were completed.


Detailing the development and operational history of the Blohm and Voss Bv Ha 137 Dive Bomber / Ground Attack Aircraft Prototype.  Entry last updated on 5/24/2017. Authored by Staff Writer. Content ©www.MilitaryFactory.com

During the German military's build up of the 1930s, many aircraft types were developed to fulfill specific roles over the battlefield. Among these was the dive bomber which was eventually filled by the classic Junkers Ju 87 "Stuka" (detailed elsewhere on this site). However, before the Stuka became the core of the German precision bombing force, there was a competition between several design houses originating from a 1934 requirement and this involved both Henschel and Blohm und Voss.

Blohm und Voss, through their Hamburger Flugzeugbau arm, developed the "Ha 137". The director of the design became Dr. Richard Vogt who had just returned from developing warplanes for the Empire of Japan under the Kawasaki brand label. The new aircraft sported gull-wing style monoplane wings, a traditional single-finned tail unit, enclosed cockpit and fixed (tail-dragging) undercarriage. At the nose of the aircraft would be a single BMW XV inline piston engine driving a three-bladed propeller unit. Crew space allowed for a single crewman. The aircraft was known to the company as "Project 6".

Overall length was 31 feet with a wingspan reaching 36.6 feet and a height of 9.1 feet. Empty weight was 4,000lb against an MTOW of 5,325lb.
Vogt's initial design submission was called to be reworked as the BMW XV engine was not to be. This led to selection of the BMW 132 instead, a licensed-production version of the American Pratt & Whitney "Hornet" air-cooled radial piston engine. The design was then revised to become "Project 6A". The British Rolls-Royce "Kestrel" engine was also in contention under "Project 6B".

The German Air Ministry moved to cover three prototypes based on the earlier work (V1 through V3) and this led to a first-flight of one of them on January 18th, 1935. The third prototype (V3) arrived with the Kestrel engine installed and three more prototypes were ordered with power stemming from the homegrown Junkers Jumo 210 series engine. Development continued into 1936.

As the competing Junkers Ju 87 had flown in September of 1935 and was introduced for service the following year, the Ha 137 had little chance of succeeding as anything by this point (a close-support role and navy version were both entertained). The remaining three prototypes (V4 through V6) were still built and became available in 1937 but, ultimately, these were used in test campaigns by Blohm und Voss.

As flown, the Ha 137 (the V4 prototype) managed a maximum speed of 185 miles per hour with cruising speeds of 180 miles per hour. Range was out to 360 miles and its service ceiling reached 23,000 feet. Rate-of-climb was 1,640 feet per minute.

Should it have been adopted for military service, standardized armament would have included 2 x 7.92mm MG 17 machine guns in the forward fuselage and 2 x 7.92mm MG 17 machine guns in underside fairings. Alternatively the latter could be substituted for 2 x 20mm MG FF automatic cannons. Beyond this fixed armament, there was provision for 4 x 110lb SC50 series conventional drop bombs.






Our Data Modules allow for quick visual reference when comparing a single entry against contemporary designs. Areas covered include general ratings, speed assessments, and relative ranges based on distances between major cities.

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Relative Maximum Speed Rating
Hi: 200mph
Lo: 100mph
    This entry's maximum listed speed (186mph).

    Graph average of 150 miles-per-hour.
City-to-City Ranges
NYC
 
  LON
LON
 
  PAR
PAR
 
  BER
BER
 
  MOS
MOS
 
  TOK
TOK
 
  SYD
SYD
 
  LAX
LAX
 
  NYC
Graph showcases the Blohm and Voss Bv Ha 137 V4's operational range (on internal fuel) when compared to distances between major cities.
Aviation Era
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Useful in showcasing the era cross-over of particular aircraft/aerospace designs.
Unit Production Comparison
Comm. Market HI*: 44,000 units
Military Market HI**: 36,183 units
6
6


  * Commercial Market High belongs to Cessna 172.

  ** Military Market High belongs to Ilyushin Il-2.


Altitude Visualization
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National Flag Graphic
Origin: Nazi Germany
Year: 1935
Type: Dive Bomber / Ground Attack Aircraft Prototype
Manufacturer(s): Blohm and Voss - Nazi Germany
Production: 6
Global Operators:
Nazi Germany (cancelled)
Historical Commitments / Honors:

Military lapel ribbon for Operation Allied Force
Military lapel ribbon for the Arab-Israeli War
Military lapel ribbon for the Battle of Britain
Military lapel ribbon for the Battle of Midway
Military lapel ribbon for the Berlin Airlift
Military lapel ribbon for the Chaco War
Military lapel ribbon for the Cold War
Military lapel ribbon for the Cuban Missile Crisis
Military lapel ribbon for the Falklands War
Military lapel ribbon for the French-Indochina War
Military lapel ribbon for the Golden Age of Flight
Military lapel ribbon for the 1991 Gulf War
Military lapel ribbon for the Indo-Pak Wars
Military lapel ribbon for the Iran-Iraq War
Military lapel ribbon for the Korean War
Military lapel ribbon for the 1982 Lebanon War
Military lapel ribbon for the Malayan Emergency
Military lapel ribbon for the attack on Pearl Harbor
Military lapel ribbon for the Six Day War
Military lapel ribbon for the Soviet-Afghan War
Military lapel ribbon for the Spanish Civil War
Military lapel ribbon for the Suez Crisis
Military lapel ribbon for the Vietnam War
Military lapel ribbon for Warsaw Pact of the Cold War-era
Military lapel ribbon for the WASP (WW2)
Military lapel ribbon for the World War 1
Military lapel ribbon for the World War 2
Military lapel ribbon for the Yom Kippur
* Ribbons not necessarily indicative of actual historical campaign ribbons. Ribbons are clickable to their respective campaigns/operations.
Measurements and Weights icon
Structural - Crew, Dimensions, and Weights:
Unless otherwise noted the presented statistics below pertain to the Blohm and Voss Bv Ha 137 V4 model. Common measurements, and their respective conversions, are shown when possible.

Operational
CREW


Personnel
1


Dimension
LENGTH


Feet
31.00 ft


Meters
9.45 m


Dimension
WIDTH


Feet
36.58 ft


Meters
11.15 m


Dimension
HEIGHT


Feet
9.19 ft


Meters
2.8 m


Weight
EMPTY


Pounds
4,001 lb


Kilograms
1,815 kg


Weight
LOADED


Pounds
5,324 lb


Kilograms
2,415 kg

Engine icon
Installed Power - Standard Day Performance:
1 x Junkers Jumo 210Aa V-12 liquid-cooled inline piston engine developing 590 horsepower and driving a three-bladed propeller unit at the nose.

Performance
SPEED


Miles-per-Hour
186 mph


Kilometers-per-Hour
300 kph


Knots
162 kts


Performance
RANGE


Miles
357 mi


Kilometers
575 km


Nautical Miles
310 nm


Performance
CEILING


Feet
22,966 ft


Meters
7,000 m


Miles
4.35 mi


Performance
CLIMB RATE


Feet-per-Minute
1,640 ft/min


Meters-per-Minute
500 m/min

Supported Weapon Systems:

Graphical image of an aircraft medium machine gun
Graphical image of an aircrat automatic cannon
Graphical image of an aircraft conventional drop bomb munition
Armament - Hardpoints (4):

STANDARD:
2 x 7.92mm MG17 machine guns in fixed, forward-firing positions at forward fuselage.
2 x 7.92mm MG 17 machine guns OR 2 x 20mm MG FF cannons fitted into the fixed undercarriage structures.

OPTIONAL:
4 x 110 lb SC50 conventional drop bombs.
Variants: Series Model Variants
• Blohm and Voss Ha 137 - Base Series Designation
• Ha 137A - Prototype with Pratt & Whitney Hornet engine installed.
• Ha 137B - Prototype with Rolls-Royce Kestrel engine installed.
• V3 - First-batch prototype
• V4 - Second-batch prototype; powered by Junkers Jumo 210 engine.
• V5 - Second-batch prototype; powered by Junkers Jumo 210 engine.
• V6 - Second-batch prototype; powered by Junkers Jumo 210 engine.