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OEC Motorcycles

OEC Motorcycle History



A Brief History of the Marque

Made in Great Britain from 1901 to 1954

Frederick Osborn of the Osborn Engineering Company began manufacture of motorcycles in 1901 using Minerva and MMC engines. After WWI, his son John Osborn resumed production of OEC-Blackburne machines, later shortened to OEC. During the marque's long lifetime models were produced with large capacity V-twin JAP, Blackburne and Matchless engines, and with Villiers two-stroke engines after WWII.

OEC Motorcycles were made in Portsmouth and Gosport. The Hampshire Museum has several OEC motorcycles, one of which is illustrated here.
OEC Timeline
 

Sources: Correspondence, VMCC, hants.gov.uk


O.E.C. 1938 Models with Matchless Engines


Model.

Engine.

Type.

250 Ensign

246 O.H.V.

37C27

350 Cadet

347 O.H.V.

37G3

500 Commander

498 O.H.V.

37G80

O.E.C. 1939 Models with Matchless Engines


Model.

Engine.

Type.

39 O.E.C.-26

347 O.H.V.

39G3

39 O.E.C.-G4

347 O.H.V.

39G4

39 O.E.C.-8

498 O.H.V.

39G80

39 O.E.C.-G9

49S O.H.V.

39G90


OEC Duplex Steering
I saw your email request on Sheldon's EMU for a better understanding of the famed OEC Duplex Steering arrangement. I attach a simple diagram which shows the geometry of the system, so you can have an idea of how it works. Having ridden many miles on these machines, I can testify to how well it all works, although the worst feature is its large turning circle and poor manoeuvrability at slow speed and when wheeling the machine about.

I did also have a frontal collision some years ago with the rear end of a Jeep which stopped suddenly without warning, which demonstrated the excellent impact absorbing properties of the machine!!! The damage looked far worse than it was, as I simply popped the bottom links out and more or less rode home...

I have also attached a picture of my OEC after the accident referred to above... Not a lot of people can have ever seen such a sight!

Kind regards

Martin Shelley
VMCC OEC and Blackburne Marque Specialist



OEC Atlanta Duo
Hi Luke, I note you sent an email some months ago to the Sheldon's EMU webpage asking for information about OEC motorcycles and the Atlanta Duo in particular. I have been busy of late restoring an old car so missed seeing your email when it was posted, but I have been the OEC Marque Specialist in the Vintage Motorcycle Club for over twenty years now and can possibly help you.

The Atlanta Duo was an unusual machine as you say, and was introduced in late 1935 for the 1936 season, but only lasted a short while so few examples were sold and as far as I know, none survive. As you can see from the attached copy of the catalogue, it was offered with four engine sizes, and the engine was canted forward to allow a very low seat height and the petrol tank was fitted under the seat above the gearbox to facilitate this. It was arguably the first motorcycle properly designed to carry two people (hence the Duo name), and the contemporary press reports showed it being ridden by two people.

The frame was based on an earlier design called the Whitwood Monocar, which was announced in mid 1934 and was in effect a two wheeled car fitted with the same novel 'Duplex' steering system OEC had pioneered in 1927 and built until the war stopped motorcycle production in late 1939.  This is described in the Sheldon webpage about OECs, and there is a picture of my 1938 OEC Duplex Commander after I had an accident which shows the safety benefits of such a system.

I hope this has helped you gain a better understanding of these interesting and unusual machines which I have been a big interest of mine for many years.

Martin Shelley
VMCC OEC and Blackburne Marque Specialist
Member VCC and VSCC

A report from the 1924 Motor Cycle Show reads: "The O.E.C. new model... will undoubtedly be the attraction on this stand. It is a super-sports, having an ingenious duplex frame, consisting of two tubes running direct from the head to the rear fork ends, and two more running to the rear fork ends again. The gear box is suspended independently in the chain stays. A novel feature is the arrangement of the magneto drive, which is by skew gears, which makes for longer life, quieter running, and a more compact power unit. A complete range of models is shown, including the... overhead valve sports model, and the 5-7 h.p. racing machine."


Thu Apr 17 2014
stambourne<at>aol.com
Company History
Osborn Engineering
DuringWW2 OEC made wheels and legs for Ansons Spitfires etc etc and above all built the Great Panjandrum for D Day an incredible device and a failure!
J S Baker (Osborn's Grandson)
Essex



OEC Timeline


If you have a query about OEC motorcycles, or can help expand this page on the history of these classic British machines, please contact us

Allen Motorcycle Museum
Allen Motorcycle Museum
Private museum in Boston, MA, with many highly collectable vintage motorcycles for sale.