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8701

3 1/2 inch gauge Derby 4F

A 3 1/2 inch gauge LMS 4F, an older model which has been in recent club use.

Club certification with hydraulic test valid until 2021, steam test expires in May 2020. The engine runs well, however there are a couple of tiny pinhole leaks on the foundation ring and throatplate - we suspect they'd take up under steam (and are pretty sure it's been running around like this for this for a while) but need either plugging or some Comsol before next test.

Technical information

Stock code

8701

Gauge

3 1/2 inch

Length/inches

41

Width/inches

6.5

Height/inches

11

Wheel material

cast iron

Cylinder material

gunmetal

Valve type

slide

Valve gear

Joy

Reverser type

screw

Lubricator type

mechanical

Boiler type

locomotive

Boiler construction

silver soldered

Boiler material

copper

Working pressure

80

Boiler number

298

Safety valve type

spring

Safety valve

2

Fusible plug

no

Whistle

yes

Hand pump

1

Mechanical pump

1

Injector

1

Superheater type

flue tube

Superheater

1

Date out

Feb-21

Hydraulic test valid to

03-Feb-21

Steam test valid to

03-May-20

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