My FE2b reproduction..

[John McKenzie]

[John McKenzie]

[John McKenzie]

These are Royal Aircraft Factory ( RAF ) designed parts which later became standard AGS ( aircraft general spares ) parts. The main body consists of two pieces ; A cast bronze front part , fully machined with 3 outlets ,and a HT brass mounting flange , to which it screws ...Within this is the lapped , tapered slotted selector part which is turned by a dural pointed lever , located thereon by a square spiggot and retained by a nut ....These parts together constitute part ..AGS 290...While the dural disc through which passes the spindle , sign the direction of passage of air ..( can't recall #'s off hand )..
Beneath the dural pointer knobbed lever , a special pressed spring detents drops into 8 "V" grooves cut at the centre of the bronze piece , to give 4 pre selectives stop positions according to the direction required .

[John McKenzie]

[John McKenzie]

The Air Relief valve is of the "Labyrinth " type ..(Drg A-4080 )..This is an adjustable valve working on the principle of a sprung loaded ball bearing " closing of the releaf exit "....The body is cast and machined from bronze (gun-metal), and the slotted adjuster is of dural .
Unlike with the air selectors ,where I had been able to obtain a full ( if grubby ) AGS drawing ; The relief valve was back engineered utilizing the next latest AGS part as a usefull reference .
All these parts are machined here , useing original materials and opperational requirements and drawings where available . Lapping in ensures air tight components .

[John McKenzie]

[John McKenzie]

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[John McKenzie]

The petrol selector cocks are made to AGS 293..( 2 off ) and the notation disc in the handle are AGS 294 , A and B.
The large rectangular Indicaton plate , through which pass the handles , is AGS 295 A.
The base body of the selector is a tin plated bronze ( GM) machined casting .The tinning takes care of any porosity and allows for the sweating in of copper tube locators for the cork disc .
Preasured onto the cork disc by sturdy spiral springs , the hollow preasure plates are also bronze , with appropriate openings ...The conical nose piece is machined from solid dural , and forms a unit with the above .
The spindle of the preasure plate finishes in a squared portion which posatively locates the dural handle ,..Knurled on its outer surface , it contains the disc direction indication , with a brass pointer screwed to its rear .
These two selectors work in conjunction with eachother , and are mounted on a fabricated wooden mounting box , faced with the larger indicator plate.
All these indicator plates are made from a material closely approximating the original " Ivorine " , which was a celluloide derivative ...Cut /engraved on clear off-white material , the lettering recess is filled with paint of the appropriate colour ...As are the Instrument labels ....
Various thicknesses , as dictated by the drawings , had to be obtained for these parts .
The Air selector disc plates are however as stated , made in dural .

[John McKenzie]

[ProfLooney]

LOL I just cant resist John

Where does the retard plaque go on the pilots seat?


seriously though what is a retart switch or guage and whats it do?