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240 Landmarks TopTrucks > Daihatsu’s First Three-wheeled Vehicle (Model HA)
 Daihatsu’s First Three-wheeled Vehicle (Model HA)
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Daihatsu manufactured the Model HA as its first vehicle, but the vehicle it actually brought to the market, in March of 1931, was the Model HB, to which a number of improvements had been added. The specifications shown here are for the Model HB.
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Storage location:DAIHATSU MOTOR CORPORATION TECHNICAL ADMINISTRATION DIV. (1-1, Daihatsu-cho, Ikeda-shi, Osaka 563-8651)
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Year manufactured:1931
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Manufacturer:Daihatsu Motor Co., Ltd.
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Classification:Literature/other (company history)
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Current status:No example in storage
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Vehicle name / Manufacture
Vehicle name:Daihatsu First Three-Wheel Vehicle
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Model name:Model HA
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Company name:Daihatsu Motor Co., Ltd.
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Year manufactured:1931
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Designed by:Daihatsu Motor Co., Ltd.
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Location of actual vehicle/replica:None
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Model / Weight
Points of interest, topicality:Hatsudoki Seizo Co., Ltd, the predecessor of Daihatsu, made efforts to enhance domestic technology and end the market domination of imported engines. As a result, it installed Japanese-built engines in its three-wheel vehicles. At the time, engines for imported motorcycles were simply mounted without modification on three-wheel vehicles. Some three-wheel vehicles were also motorcycles with an extra wheel at the rear. This gave them extremely poor maneuverability and operability. Three-wheel vehicles of this type included the Well-Be, Yamarta, New Era, HMC, MSA, and the like
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Body / Size
Overall length:2780 mm
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Overall width:1200 mm
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Overall height:1200 mm
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Body / Axle / Driving / Others
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Engine / Size / Power
Cooling/cylinder arrangement:Air-cooled/single cylinder
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Valve train:4 cycle side valve
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Bore x stroke:80×99 mm
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Displacement:498 cc
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Hybrid
Hybrid system type:None
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Drive-train
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Performance
Mode fuel efficiency:-
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Reference materials:Daihatsu Industries Co., Ltd. "Daihatsu 60 Nenshi" page 18, issued on 1st March 1967
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Vehicle introduction:Effect/notes: At the time, the market was dominated by imported engines, which were usually installed into the hand-made vehicles.
However, Daihatsu decided to manufacture its engines locally and started production of engines and bodies more suited to mass production.
This was an important landmark for the Japanese automotive industry.
Technical features: The adoption of a locally manufactured engine, and the integration of the engine and body design have been described previously. Initially, three-wheeled vehicles had a simple structure created by extending a motorcycle wheelbase, adding an extra wheel at the rear and installing a packing box. Such vehicles were also powered by the same chain drive as the motorcycle. This lacked durability and cornering performance.
The Daihatsu three-wheeled vehicles at the time focused on these points and adopted the first power transmission driveshaft. This improvement was applied to the model HB three-wheeled vehicle in August, 1931.
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