Comparison of OO 4-6-2 Class 8P Princess Royal LMS models


Manufacturer	Tri-ang	Tri-ang	Hornby	Hornby	Hornby	Hornby
Year model introduced	1950	1970	1984	2001	2005	2019
DCC Capability	DCC compatible but no socket. Complete rewire required - OO	DCC compatible but no socket	Motor fitted but no DCC socket. Ringfield motor	DCC compatible but no socket	DCC Ready. 8-pin socket	DCC Ready. 8-pin socket
Detailing
Bodyshell - factory-fitted separate details
Body supports	No	No	No	No	No	Yes
Chimney	No	No	No	No	No	Yes
Handrails	No	No	Yes	Yes	Yes	Yes
Injector	No	No	No	No	No	Yes
Injector pipework	No	No	No	No	No	Yes
Lamp irons	No	No	No	Yes	Yes	Yes
Pipe work	No	No	No	No	No	Yes
Regulator linkage	No	No	No	No	No	Yes
Release valve	No	No	No	No	No	Yes
Reverser	No	No	Yes	Yes	Yes	Yes
Roof hatch	No	No	No	No	No	Yes
Safety valves - turned brass	Yes	Yes	Yes	Yes	Yes	Yes
Smokebox door dart	No	No	No	Yes	Yes	Yes
Vents	No	No	No	No	No	Yes
Water scoop	No	No	No	No	No	Yes
Whistle - turned brass	No	No	No	Yes	Yes	Yes

Chassis/underframe detail
Brake rigging chassis	No	No	Yes	Yes	Yes	No
Correct-thickness "stamped" rods	No	No	No	No	No	Yes
Fluted connecting rods with oily finish	No	No	No	No	No	Yes
Lubricator mechanism	No	No	No	No	No	Yes
Pipework	No	No	No	No	No	Yes
Sand boxes	No	No	No	No	No	Yes
Sanding gear	No	No	No	No	No	Yes
Sprung front bogie	No	No	No	No	No	Yes

Cab, footplate & interior detail
Detailed & painted	No	No	No	No	No	Yes
Footplate doors	No	No	No	No	No	Yes
Glazing	No	No	No	Yes	Yes	Yes

Tender
Has easy-to-use coupling to loco	Yes	Yes	Yes	No	No	Yes
Has enclosure for speaker	No	No	No	No	No	Yes
Houses digital decoder	No	No	No	No	No	Yes
Houses PCB	No	No	No	No	No	Yes

Wheel "aesthetics"
Chemically-blackened	No	No	No	No	No	Yes
Coloured-plastic	No	No	Yes	Yes	Yes	No
Metal-pin point bearings	No	No	No	No	No	Yes
Nickel-plated	No	No	Yes	No	No	No
Painted	No	No	Yes	No	No	Yes
Solid-spoked wheels	Yes	Yes	No	No	No	No

Bufferbeam detail (pre-fitted)
Cosmetic coupling - hook only	No	No	No	No	No	Yes
Lifeguard	No	No	No	No	No	Yes
Pipework - pre-fitted to front	No	No	No	No	No	Yes
Pipework - pre-fitted to rear	No	No	No	No	No	Yes
Sprung buffers	No	No	No	No	No	Yes

Bufferbeam detail (in detailing pack)
Pipework (for rear)	No	No	Yes	No	No	No

Detail pack also contains...
Brake rigging	No	No	No	No	No	Yes

Mechanical
Body Construction	No	No	No	No	No	Plastic with metal parts
Working cosmetic features
Roof vent	No	No	No	No	No	Yes

Chassis construction	Diecast	Diecast	Plastic & metal	Plastic & metal	Plastic & metal	Heavy diecast
Loco-driven wheels (number of)	2 wheels	2 wheels	None	2 wheels	2 wheels	6 wheels
Minimum radius	Radius 1	Radius 1	Radius 2	Radius 2	Radius 2	Radius 2
Coupling socket/mounting
Fixed	Yes	Yes	Yes	No	No	No
NEM pockets	No	No	No	Yes	Yes	Yes

Coupling type	Tension lock	Tension lock	Tension lock	Tension lock	Tension lock	Tension lock
Weighting (to assist adhesion)
Within boiler	No	No	No	No	No	Yes
Within chassis	No	No	No	No	No	Yes
Within tender	No	No	Yes	No	No	Yes

Separating the body from the chassis	Secured with one or more screws	Secured with one or more screws	Secured with one or more screws	No	No	Secured with one or more screws
Electrical
Motor type	3-pole	X04	Ringfield	5-pole (standard)	5-pole (standard)	5-pole with flywheel
Motor location	Locomotive	Locomotive	Tender	Locomotive	Locomotive	Locomotive
Power collection	2 rail DC	2 rail DC	2 rail DC	2 rail DC	2 rail DC	2 rail DC
Working lights
Firebox flicker	No	No	No	No	No	Yes

Pickups	2 out of 3 axles	2 out of 3 axles	No	Driving wheels only	Driving wheels only	Driving wheels and tender wheels
DCC speaker	No provision for speaker	No provision for speaker	No provision for speaker	No provision for speaker	No provision for speaker	Provision for 28mm round speaker
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