Maibohm Model B

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Maibohm
Maibohm Model B-6 Phaeton (1920)
Maibohm Model B-6 Phaeton (1920)
Model B
Model B-6
Production period: 1918-1922
Class : Middle class
Body versions : Roadster , touring car , Phaeton , sedan , coupé
Engines: Otto engine :
3.2 liters
(33.6 kW)
Length:
Width:
Height:
Wheelbase : 2921-2946 mm
Empty weight :
successor Courier Model D

The Maibohm Model B , from 1919 Maibohm Model B-6 , was a six-cylinder - cars of the American middle class. The manufacturer was the Maibohm Motors Company . In Great Britain the vehicle was offered as Maibohm 20 hp .

Maibohm Motors Company

The Maibohm Motors Company emerged in 1916 from the long-standing Maibohm Wagon Works in Racine ( Wisconsin ). The manufacturer's first motor vehicle was the Model A , which was available as an open and closed two-seater with an in-house two-liter engine. It was launched in late 1916 for the 1917 model year.

In the following year he was given a larger series with the six-cylinder Maibohm Model B. The production of the Model A ended without replacement at the end of 1918. Maibohm Motors experienced a conflagration on New Year's Eve 1918 and produced the revised six-cylinder model B-6 in new facilities in Sandusky ( Ohio ) from 1919 . The company was taken over by its creditors in May 1922. These formed the Courier Motors Company a rescue company whose only product of the Courier Model D was. Courier Motors went bankrupt in 1923 and had to close.

Model history

Model B was the larger series when it was introduced in 1918 and remained the manufacturer's only product after the small series of four-cylinder Maibohm Model A was discontinued at the end of the 1918 model year. After a slight revision to the Model B-6 in model year 1919, it was built practically unchanged until the plant was closed and, as the Courier Model D , experienced another model year with minor changes.

Maibohm Motors was taken over by creditors in May 1922. These formed the Courier Motors Company a rescue company whose only product said Courier Model D was. It was only offered in 1923.

market

Apperson Light Six 6-16 Touring (1916), US $ 1485.-

The Maibohm Model B / B-6 was designed in a fiercely competitive market segment, into which other manufacturers were pushed who were not up to the price war in the lower range. The better-known providers in this class at the time included Auburn , Buick , Chalmers , Chandler , Hudson , Hupmobile , Nash , Jordan , Oldsmobile , Reo or Studebaker .

Similar small providers were Ace , Bush (only sold via direct mail ), Fremont , Handley-Knight , Inter-State and Stephens . The Grant Motor Car Company had already introduced a small sports car similar to the Maibohm Model A in 1913 , but abandoned this concept after 1916 in favor of larger models. This also made Grant a competitor for the Maibohm Model B / B-6 ; production ended in 1923.

Maibohm had by far its most successful year in 1920 with 1,212 units sold. It is noticeable that there were annual, in some cases considerable, price increases. It is not very likely, at least for the open versions, that better equipment has been absorbed. It is more obvious that increasing cost pressure was passed on to customers. Price reductions for 1922 were more likely due to the market situation and the slump in sales in the last financial year.

export

Although American automobiles with relatively large-volume engines were tax-disadvantaged in Europe and Maibohm vehicles were produced in smaller series, some were also exported. The sole Maibohm concessionaire for Great Britain and Ireland, i.e. the general agency , was Southgate, Ltd. , 19-21 Heddon Street, Regent Street in London W.1. In France, Model B-6 should have been assessed as a 16 CV at that time, which put it in a tax class with luxury brands such as Lorraine-Dietrich or Panhard .

technology

engine

The water-cooled six - cylinder engine was purchased from Falls . It was probably an overhead in- line engine , of the type X-9000 , with minor deviations; However, these are so small that they can also have been caused by rounding errors . The Falls X-9000 has a crankshaft with three main bearings and 195.581 ci (3205 cc) displacement with a 3.13 inch bore and 4.24 inch stroke (79.38 × 107.95 mm). He had spin lubrication ; it was the successor Courier Model D by a dry sump replaced.

Depending on the source, the power is given as 46 bhp (34.3 kW) or 45 bhp (33.6 kW) at 2600 rpm. A British representative named 46 bhp at 2290 / min and a maximum speed of 3510 / min. The NACC rating based on the engine bore results in a value of 23.44 hp, which in Great Britain also corresponds to the applicable tax horsepower (the importer, however, mentioned 20 hp); This value says nothing about the actual engine performance. The cooling time typically operates with thermosiphon , the mixture forms a Stromberg - gasifier ;; a Tillotson carburetor is only mentioned for 1922 .

This modern engine with a one-piece cast block and removable cylinder head was used in the above-mentioned Courier Model D , in the Fremont R-6 and in the Handley Six-40 .

The vehicle has a honeycomb cooler, battery ignition, 6-volt system and petrol delivery by vacuum.

Power transmission

The power is transmitted by a single-disc clutch and a three-speed gearbox; a conventional, unsynchronized gearbox on the rear axle has been used since 1921, but probably before that.

The axle drive has a spiral toothed ring gear and bevel gear. The ratio is 4.25: 1 in model year 1918, 4.5: 1 from 1919 to 1921 and 5.0: 1 in model year 1922.

Chassis and suspension

The wheelbase was 115 inches (2921 mm) only in the year 1918, after which it remained at 116 inches (2946 mm) for the remainder of the production period . Little information is available about the design of the chassis . Typical time, a structure as was pressed steel - leadframe with two offset side members and several (usually four or five) traverses and, occasionally, additionally reinforced with twist tube -Rundstäben, the front and rear struts at the end of the chassis and are attached. The latter cannot be seen on the sparse illustrations, at least at the front. In the Courier Model D , they are neither present at the front nor at the back, which, due to the documented technical similarity, indicates that they were not used in the Maibohm either. The rearmost cross member also carries the fuel tank on the Courier .

The rigid axles front and rear are also typical of the time . On the B and B-6 up to model year 1921, the rear axle is "free-floating", in model year 1922 "three-quarters floating".

For all model years it is noted that semi-elliptical leaf springs were used at the rear ; the front semi-elliptic leaf springs used for 1922 and the Courier may also have been used in the earlier model years.

In 1918 there was an unspecified option for the rims with a tire size of 32 × 3½ inches. What was meant were probably wooden-spoke artillery wheels with or without a removable wheel rim. At least for 1922 this is documented as part of the basic equipment. and possibly wire spoke wheels. For 1919 there is no information about the rims; new tires measuring 32 × 4 inches were fitted. From 1920 wooden-spoke artillery wheels were used for all Maibohm ex works, in 1922 the cord tires that had just emerged were explicitly mentioned. With the cord fabric incorporated into the tire, a textile reinforcement of the carcass was achieved.

There is no information about the brakes for the early models. From 1921 it is documented that both the service and auxiliary brakes act on the brake drums on the rear axle. Front-wheel brakes did not gain acceptance on a broad front until after 1925.

At least these later Maibohm had a worm steering .

Body and equipment

Maibohm Model B-6 Sedan (1922).

The origin of the bodies is not documented, but the assumption is not far-fetched that Maibohm, as a former coach builder, was well equipped for their manufacture. After the fire and the subsequent move, the body shop seems to have continued. After all, the successor Courier Motors , which produced in the same plants from 1922 to 1923, advertised in a sales brochure with the note Custom built in the Courier shops (“hand-made in the Courier workshops”). The usual procedure was to plank a structure made of stored hardwood with sheet steel (composite construction). Initially available were, in addition to the obligatory touring (five-seater), a two-seater roadster , a coupé and an unspecified roadster-coupé , probably the roadster with a fixed or removable winter top .

Apparently, starting in 1919, attempts were made with the Model B-6 to sell the car more about its comfort and utility than about its sportiness. A Phaeton replaced the Touring and instead of two-seater there was now a Brougham and a Sedan . 1920 brought only slightly higher prices. In 1921 a roadster and a coupé appeared again, but now with three resp. four seats. The latter replaced the four-seater Brougham. New was the fashionable sport that would have been called sports tourer in Great Britain and torpedo in the rest of Europe . In principle, the difference was in other fenders, steps instead of boards and a seating arrangement for four instead of five people. In the shortened model year 1922, prices were reduced and a Sport Roadster was added later, because it is not yet listed on the previously published data sheet in McClure's Automobile Year Book for 1922. There is no information on this, but it should have received fenders and steps analogous to the sport . McClure's provides further information at first hand: For 1922 it is noted that the B-6 was available in Baltic green or Burgundy , each with a black chassis and the same wheels, and that the basic equipment, in addition to the wheels mentioned with removable wheel rim, also includes a speedometer and battery charge indicator and included an electric horn.

Special bodies are only known from one British regional agency, Brook Motor & Engineering Co. , Deansgate, Manchester , which offered a tourer as a sporting model . The body manufacturer is not known.

Model overview

Type Bj. engine W × H
in./ mm
Cubic capacity c.i./cm³		 Power
bhp / kW 1 / min		 wheelbase body List price
US $
Model B
23.4 HP (NACC)		 1918 R6 ohv
falls 		3⅛ × 4¼
82.55 × 114.3		 195.6 / 3205 46/34 at 2250 115  in (2,921  mm ) Roadster
2 pl.		 000000000000975.0000000000975
Model B
23.4 HP (NACC)		 1918 R6 ohv
falls		 3⅛ × 4¼
82.55 × 114.3		 195.6 / 3205 46/34 at 2250 115  in (2,921  mm ) Touring
4 pl.		 000000000000975.0000000000975
Model B
23.4 HP (NACC)		 1918 R6 ohv
falls		 3⅛ × 4¼
82.55 × 114.3		 195.6 / 3205 46/34 at 2250 115  in (2,921  mm ) Roadster-Coupé
2 pl.		 000000000001095.00000000001,095
Model B
23.4 HP (NACC)		 1918 R6 ohv
falls		 3⅛ × 4¼
82.55 × 114.3		 195.6 / 3205 46/34 at 2250 115  in (2,921  mm ) Coupé
2 pl.		 000000000001375.00000000001,375
Model B-6
23.4 HP (NACC)		 1919 R6 ohv
falls		 3⅛ × 4¼
82.55 × 114.3		 195.6 / 3205 46/34 at 2250 115  in (2,921  mm ) Phaeton 000000000001290.00000000001,290
Model B-6
23.4 HP (NACC)		 1919 R6 ohv
falls		 3⅛ × 4¼
82.55 × 114.3		 195.6 / 3205 46/34 at 2250 116  in (2,946.4  mm ) Brougham 000000000001890.00000000001,890
Model B-6
23.4 HP (NACC)		 1919 R6 ohv
falls		 3⅛ × 4¼
82.55 × 114.3		 195.6 / 3205 46/34 at 2250 116  in (2,946.4  mm ) Sedan 000000000001890.00000000001,890
Model B-6
23.4 HP (NACC)		 1920 R6 ohv
falls		 3⅛ × 4¼
82.55 × 114.3		 195.6 / 3205 46/34 at 2250 116  in (2,946.4  mm ) Phaeton
5 pl.		 000000000001395.00000000001,395
Model B-6
23.4 HP (NACC)		 1920 R6 ohv
falls		 3⅛ × 4¼
82.55 × 114.3		 195.6 / 3205 46/34 at 2250 116  in (2,946.4  mm ) Brougham
4 pl.		 000000000001995.00000000001.995
Model B-6
23.4 HP (NACC)		 1920 R6 ohv
falls		 3⅛ × 4¼
82.55 × 114.3		 195.6 / 3205 46/34 at 2250 116  in (2,946.4  mm ) Sedan
5 pl.		 000000000001995.00000000001.995
Model B-6
23.4 HP (NACC)		 1921 R6 ohv
falls		 3⅛ × 4¼
82.55 × 114.3		 195.6 / 3205 46/34 at 2250 116  in (2,946.4  mm ) Roadster
3 pl.		 000000000001575.00000000001,575
Model B-6
23.4 HP (NACC)		 1921 R6 ohv
falls		 3⅛ × 4¼
82.55 × 114.3		 195.6 / 3205 46/34 at 2250 116  in (2,946.4  mm ) Phaeton
5 pl.		 000000000001575.00000000001,575
Model B-6
23.4 HP (NACC)		 1921 R6 ohv
falls		 3⅛ × 4¼
82.55 × 114.3		 195.6 / 3205 46/34 at 2250 116  in (2,946.4  mm ) Sport
4 pl.		 000000000001750.00000000001,750
Model B-6
23.4 HP (NACC)		 1921 R6 ohv
falls		 3⅛ × 4¼
82.55 × 114.3		 195.6 / 3205 46/34 at 2250 116  in (2,946.4  mm ) Coupé
4 pl.		 000000000002395.00000000002,395
Model B-6
23.4 HP (NACC)		 1921 R6 ohv
falls		 3⅛ × 4¼
82.55 × 114.3		 195.6 / 3205 46/34 at 2250 116  in (2,946.4  mm ) Sedan
5 pl.		 000000000002395.00000000002,395
Model B-6
23.4 HP (NACC)		 1922 R6 ohv
falls		 3⅛ × 4¼
82.55 × 114.3		 195.6 / 3205 46/34 at 2250 116  in (2,946.4  mm ) Roadster
3 pl.		 000000000001395.00000000001,395
Model B-6
23.4 HP (NACC)		 1922 R6 ohv
falls		 3⅛ × 4¼
82.55 × 114.3		 195.6 / 3205 46/34 at 2250 116  in (2,946.4  mm ) Sport Roadster
3 Pl.		 000000000001395.00000000001,395
Model B-6
23.4 HP (NACC)		 1922 R6 ohv
falls		 3⅛ × 4¼
82.55 × 114.3		 195.6 / 3205 46/34 at 2250 116  in (2,946.4  mm ) Phaeton
5 pl.		 000000000001395.00000000001,395
Model B-6
23.4 HP (NACC)		 1922 R6 ohv
falls		 3⅛ × 4¼
82.55 × 114.3		 195.6 / 3205 46/34 at 2250 116  in (2,946.4  mm ) Sport
4 pl.		 000000000001595.00000000001,595
Model B-6
23.4 HP (NACC)		 1922 R6 ohv
falls		 3⅛ × 4¼
82.55 × 114.3		 195.6 / 3205 46/34 at 2250 116  in (2,946.4  mm ) Coupé
4 pl.		 000000000002295.00000000002,295
Model B-6
23.4 HP (NACC)		 1922 R6 ohv
falls		 3⅛ × 4¼
82.55 × 114.3		 195.6 / 3205 46/34 at 2250 116  in (2,946.4  mm ) Sedan
5 pl.		 000000000002295.00000000002,295

In the case of Sedan and Brougham, it is unclear whether they are two- or four-door versions. In addition, no exact definition can be found for the latter, because the designation Brougham is often based on marketing considerations rather than technical principles. After all, the model combination suggests that two-door, four-seat Brougham and four-door, five-seat Sedan were offered. This thesis is supported by the fact that the Courier Model D with practically identical bodies was also listed as a four-door sedan.

production

The production figures can be found in the Standard Catalog of American Cars 1805-1942 . According to this source, 615 vehicles were built in model year 1918; 1919 (after a factory fire and relocation to Cleveland) 327, 1920 1212; 1921 623 and 1922 217 vehicles. That makes 2994 vehicles, with both four-cylinder Model A and six-cylinder Model B included in the 1918 figure . This results in a total of 2379 Model B-6s with the longer wheelbase (1919–1922). Occasionally, 373 Courier Model D are also cited as a further development of the Maibohm Model B-6 .

Chassis numbers

Like Ford, Maibohm also did without chassis numbers ; the engine number was used for this at the same time. For Model B and its successor, this was a four-digit number that is interpreted as follows:

Model year 1918: No. 501 to 2350
Model year 1919: No. 2351 to 6200
Model year 1920: from No. 6201

No information is available for 1921 and 1922. On Model A , the badge was placed on the left side of the engine block; the position information is missing for the B and B-6 . The use of this system is remarkable insofar as if with some certainty it should have its own engine numbers and therefore there must be two numbers.

Remarks

  1. ↑ Predecessor formula for SAE-PS . NACC ( National Automobile Chamber of Commerce ) was an association of the automotive industry founded in 1913 and the successor to the ALAM ( Association of Licensed Automobile Manufacturers ), which introduced the first standards in US automotive engineering in 1903. The inaccurate method for measuring performance was also used by the RAC in Great Britain and was mainly used for allocation to a tax class ( RAC Horsepower ).
  2. ↑ In the case of axles with a "free-floating" design, the wheel hub is connected to the outer end of the axle body via a roller bearing . The half-waves are therefore freed from transverse forces. The outer shaft end is in the wheel hub, and the torque is usually transmitted by a gear coupling .
  3. ↑ To make work easier after a flat tire, only the removable wheel rim and tires were replaced, the hub and wooden spokes remained on the vehicle. Such demountable rims were common in the 1910s and 1920s.
  4. ↑ You probably mean a removable winter top similar to a hard top . These could be used with or without side panels. See also White's Permanent Top .
  5. ↑ New model, no details. Possibly shortened fenders and steps instead of continuous running boards.

literature

Web links

Commons : Maibohm  - collection of images, videos and audio files

Individual evidence

  1. ↑ a b c d e f g Kimes, Clark: Standard Catalog of the American Automobile , 1996, p. 916 (Maibohm)
  2. ↑ a b c d Kimes, Clark: Standard Catalog of the American Automobile , 1996, p. 383 (Courier)
  3. ↑ American Automobiles: The Maibohm Automobile & The Maibohm Motors Co.
  4. ^ Kimes, Clark: Standard Catalog of American Cars 1805-1942 , 1996, p. 58 (Apperson 1914-1919).
  5. ↑ a b Kimes, Cark: Standard Catalog of American Cars 1805-1942 (1996), p. 197 (Bush).
  6. ↑ a b Kimes, Clark: Standard Catalog of the American Automobile , 1996, p. 614 (Fremont)
  7. ↑ a b Kimes, Clark: Standard Catalog of the American Automobile , 1996, p. 674 (Handley-Knight)
  8. ^ Kimes, Clark: Standard Catalog of American Cars 1805-1942 , 1996, pp. 652-654 (Grant).
  9. ^ Southgate, Ltd .: Maibohm Coupé (advertisement, ca.1919).
  10. ↑ a b c d e carfolio.com: Specifications Courier Model D (1922)
  11. ↑ a b c d e f g h i j American Automobiles: The Maibohm Automobile & The Maibohm Motors Co .; Data sheet 1922
  12. ↑ a b c Kimes, Clark: Standard Catalog of the American Automobile , 1996, pp. 916–917 (Maibohm)
  13. ↑ a b c Brook Motor & Engineering Co .: Maibohm 20 hp (advertisement, approx. 1919).
  14. ^ NACC: Handbook of Automobiles 1915-1916 , 1970; P. 12 (PS NACC).
  15. ↑ a b c d e f g h i j classiccardatabase.com: Standard Specifications 1918 Maibohm Model B
  16. ↑ a b c d e f g classiccardatabase.com: Standard Specifications 1922 Maibohm Model B-6
  17. ↑ a b c d e f g classiccardatabase.com: Standard Specifications 1921 Maibohm Model B-6
  18. ↑ a b c d classiccardatabase.com: Standard Specifications 1919 Maibohm Model B-6
  19. ↑ a b c d e classiccardatabase.com: Standard Specifications 1920 Maibohm Model B-6
  20. ↑ a b c d e Courier Motors Company (ed.): A Good, Husky Six , Courier sales brochure (1923).
  21. ^ Early American Automobiles: American Automobiles; EAA1917-1920.
  22. ↑ classiccardatabase.com: Standard Specifications 1917 Maibohm Model A
  23. ↑ classiccardatabase.com: Standard Specifications 1918 Maibohm Model A