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A Gas tank for the
Hornby Rocket Locomotive.
Click here for details.

BIX029
Boiler Pressure Regulator.
Click here for details



Forest Classics, sponsors
of Robert Handcock &
Ken Edwards, at the Isle
of Man TT races.
Congratulations to Rob & Ken for winning 5th place at the 2012 Sidecar event!
Visit RJ Road Racing website
Click here

 

 

The Atkinson "Standard" Steam Lorry & the Super Sentinel.

 
     
 

Up to the 1930's the Steam Lorry was a popular alternative to the horse or traction engine for medium weight road haulage. There were two main types, the Overtype which was like a small traction engine at the front with the cylinder on top of a horizontal locomotive type boiler, and the Undertype which had a vertical boiler in the cab and the cylinders mounted under the chassis. Many manufacturers made engines of one type or the other, the most common being Foden for the Overtype and Sentinel for the Undertype.

 
 


 
 

Click here to see the Super Sentinel working

 
 

We have chosen the SUPER SENTINEL Undertype to model along with the slightly earlier ATKINSON "STANDARD" which, although popular in its time, has many fewer survivors in preservation. THESE MODELS ARE NOT INTENDED FOR PASSENGER HAULING and so come complete with radio control as Standard. They are the same mechanically, the differences being in the cab, wheels and detailing.

 
 



 

 
 

There are two body styles which are interchangeable, the Box body and the Dray, being available with either model. In the rear is the gas (Propane/Butane) tank and condenser under the body, lift off the body to fill the tank, gas is then fed to the burner at the base of the boiler. Also available is an optional gas control valve which will prevent the safety valve from blowing by automatically turning the burner down at full pressure and up again when the pressure falls.

Steam is taken from the boiler through the lubricator to the twin oscillating cylinders. These are double acting and the lorry can be stopped, started, reversed and three point turned at will. Exhaust steam is then let to the condenser which will catch the bulk of the oil and wet from the steam, before it is exhausted through the tail pipe or chimney.

The cylinders drive through gear and chain reduction to the rear axle which is equipped with a fully working differential. Both axles are fully sprung with working leaf springs. Two channel radio control works the servos mounted behind the boiler under the chassis, one controlling the steering and one the engine speed and reversing. The boiler is equipped with pressure and water gauges and will run for approximately 35 minutes before the gas tank, boiler and lubricator need filling. The cab roof is easily removed to give access to the boiler filler.

These models are amongst the easiest for kit builders, there are still a good many small parts but there is little drilling and riveting.

 
     
 

Atkinson & Sentinel Specification

 
  Scale - 1"  
  Boiler - Gas fired, vertical  
  Boiler diameter - 3" (89mm)  
  Boiler height - 10" (260mm)  
  Working pressure - 30 p.s.i. (2.1 bar)  
  Cylinders - In-line twin  
  Bore - 7/16" diameter (11mm)  
  Stroke - 7/16" (11mm)  
  Wheels - 4⅛" diameter - 105mm (front)  
    - 6" diameter - 171mm (rear)  
  Wheelbase - 10" (276mm)  
  Length - 22" (545mm)  
  Width - 7" (184mm)  
  Height - 10" (267mm)  
  Weight - 16lbs (7.25kg)  
 

 

 
 

Twin Channel Radio Control

 
 

Click here for prices

 


 

LATEST NEWS.

Ministeam

Atmospheric Engine

Click here for details

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BIX012 Gas Burner Set for the Mamod Steam Wagon

Click here for details

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New Wilesco Stirling Engines
Click
here for details

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New Collectables on

the Used Models page

Click here for details

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Paying by cheque?
It couldn't be easier.

Click here for details

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The Burrell Traction Engine is back!
Click here for details
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Visit our new
Bespoke Models page.

Click here

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NEW!
Two superb
PM Research
Un-machined Kits.
Click here for details.

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NEW!

PM Research Dynamo

Click here for details.

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BIX030 kit

Click here for details.

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