Mamod Mobiles

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A page dedicated to the mobile engines in Mamod's range.

Mobiles at STIA 2013

The Mamod LB1 and SW1

The impressive Mamod LB1 omnibus

A fine gathering of Mamod traction engines and rollers

Mamod rollers c1961-1973

Mamod TEs dating from 1963-1990

On tow... the 65 SR1, 67 SR1a and 82 TWK with their loads

An SR1a roller from c1973

Mint, boxed and unfired - TE1a c1972/3

The SW1 Steam Wagon, introduced in 1972 - their finest mobile

Detail of the drive side of a meths fired green SW1 from 1972

Mobile steam engines first appeared in the Mamod range in 1961, with the Mastrand inspired SR1 roller. The ubiquitous TE1 traction engine followed in 1963. Both engines are still in the present day range, although they have had several iterations since then. See seperate section devoted to Mamods two most 'famous' models.

A close up of the original one piece SR1 burner and scuttle

Mamod patented finger burner! The turned brass whistle was used until 1972. Note screw fixings.

Detail of cylinder side of a blue SW1 dating from 1988

A Mamod ME1 marine engine from 1958, a different kind of mobile

The SW1 Steam Wagon was mostly designed by Steve Malins and was Mamod’s third mobile. Introduced in 1972 it was a big, heavy model of an overtype wagon, sometimes referred to as the Foden wagon because of the wonderful rear wheel design, reminiscent of the Foden wagons. The first versions of the wagon were green and methylated spirit fired, later in 1976/77 the solid fuelled blue version was introduced. This superb engine remains in the Mamod range to this day.

A beautifully detailed crank from a 1961 SR1 roller

Early SR1s couldn't tow anything - a result of the one-piece scuttle and buner

The Steam roller and traction engine - a brief history
The Mamod SR1 roller was Mamod's first mobile steam engine. Designed by Eric Malins and inspired by the 'Mastrand' roller of the 1950s. Early rollers are easy to spot - all have the one-piece burner and scuttle (rivetted together) and no tow hook. Also these early engines were mostly put togther using screw fixings. At the time of the introduction of the TE1 traction engine (or steam tractor), the brass one piece burner and scuttle was dropped and the standard Mamod black vapourising lamp introduced. The roller now had a tow hook, although curiously enough Mamod themselves never added to the range any sort of trailer or wagon for it to pull until 1969.
In 1965 all the screw fixing were eliminated and 'pop' rivets employed. The earliest forms of SR and TE are what enthusiasts refer to as 'Nut and bolt' versions. From 1967 both the SR1 and the TE1 became the SR1a and TE1a respectively as the engine unit became bi-directional. The Tractor lost its exhaust throttle with this modification. Early versions of these had straight control levers and are hard to find (see 1967 TE below). The roller gained mazak rolls in about 1968, making a straight levered, aluminium wheeled SR1a a very hard to find variation of this long lived design.
In 1972 the turned brass whistle was replaced by the spring reset whistle - the brass version looked nice, but positioned on the top of the firebox (in the case of the roller and tractor) made it near impossible to operate without a cloth or gloves!! 
Another major change came in 1976 when solid fuel replaced the meths burners on all Mamod engines. In 1977/8 sight glasses replaced the overflow plugs.
There have been many other minor iterations of the roller and tractor, as well as special one off variations and I may go into these at a later date. Suffice to say these two staples of the Mamod steam stable are still going strong today, and although they have now been joined by a much broader range of mobiles its the SR and the TE which will always capture my imagination.

1965 te1a with a straight control lever arm.jpg
The 1967 TE1a - with straight control lever arm