652 Robey + Co. 7 ton Tandem Roller (1924) FE 6319 The Mistress
Robey + Co. Tandem Roller (1924) Production 79
Engine Number 41602
Name The Mistress
Registration Number FE 6319
Cylinders: Compound
ROBEY & Co ALBUM
www.flickr.com/photos/45676495@N05/albums/72157631017030276
Steam rollers were commonly of the traditional 3-roller design. The Tandem roller, as the name suggests, has only two rolls. Furthermore, traditional rollers were gear-driven, like traction engines: the Tandem is chain-driven via a Renold 2" pitch roller chain. There are other notable features, distancing this design from what had gone before, eg. instead of a bobbin-and-chain steering system, a worm-and-quadrant was used. Finally, unlike other rollers, traction engines, etc., where the boiler is the 'chassis', the Tandem rollers boiler sits in a separate rolled-channel girder chassis, thus relieving the boiler of many working strains. All controls are placed so that one man can drive and steer. The main design feature is the loco-type boiler with round firebox and no stays with a working pressure of 200 lbs. sq. in. (in the wagons it was 250 lbs sq in) tested to 425 lbs sq in. Fitted with double Ramsbottom safety valves, Klinger reflex water gauge, compound engine, crankshaft of forged nickel chrome vanadium steel heat treated to 70 tons per sq in with balance weights forged solid with crank. Ball and roller bearings.
This engine was supplied new to the Limmer Asphalt Company and on to Winksworth Quarries. Bought by present owner in 2011
Of the 72 Tandem engines produced by Robey 10 are known still to exist
Thanks for 16.3 Million views
Shot 12 Aug 2012 at the Astle Park Traction Engine Rally, Chelford Cheshire Ref:93a-652
652 Robey + Co. 7 ton Tandem Roller (1924) FE 6319 The Mistress
Robey + Co. Tandem Roller (1924) Production 79
Engine Number 41602
Name The Mistress
Registration Number FE 6319
Cylinders: Compound
ROBEY & Co ALBUM
www.flickr.com/photos/45676495@N05/albums/72157631017030276
Steam rollers were commonly of the traditional 3-roller design. The Tandem roller, as the name suggests, has only two rolls. Furthermore, traditional rollers were gear-driven, like traction engines: the Tandem is chain-driven via a Renold 2" pitch roller chain. There are other notable features, distancing this design from what had gone before, eg. instead of a bobbin-and-chain steering system, a worm-and-quadrant was used. Finally, unlike other rollers, traction engines, etc., where the boiler is the 'chassis', the Tandem rollers boiler sits in a separate rolled-channel girder chassis, thus relieving the boiler of many working strains. All controls are placed so that one man can drive and steer. The main design feature is the loco-type boiler with round firebox and no stays with a working pressure of 200 lbs. sq. in. (in the wagons it was 250 lbs sq in) tested to 425 lbs sq in. Fitted with double Ramsbottom safety valves, Klinger reflex water gauge, compound engine, crankshaft of forged nickel chrome vanadium steel heat treated to 70 tons per sq in with balance weights forged solid with crank. Ball and roller bearings.
This engine was supplied new to the Limmer Asphalt Company and on to Winksworth Quarries. Bought by present owner in 2011
Of the 72 Tandem engines produced by Robey 10 are known still to exist
Thanks for 16.3 Million views
Shot 12 Aug 2012 at the Astle Park Traction Engine Rally, Chelford Cheshire Ref:93a-652