Amelia Squariel: W/NG – Lucas DU42

 Originality creeps nearer with each passing weblog publish in the mean time, this time with a real Lucas DU42 headlamp. The bike has worn a Indian duplicate since I’ve had it, and since one got here up throughout the membership some time again I’ve had a plan to interchange it, with a little bit of assist from Wali Taylor who got here up with the right flat glass.

This image comes from the W/NG workshop guide and reveals the BA15 bulb holder, with adjustable focus (C), held in place with the lengthy spring clip and the early rim clip (A) my bike would have worn:

The lengthy spring clips (B) are retained to the reflector with two little sheet metallic clips, riveted to the reflector. Certainly one of mine was rusted away, so right here is the alternative made out of a scrap of 0.5 mm sheet metal:

Here is the start of a rivet made out of 2.5 mm² annealed copper wire:

(rivet moving into)

The following factor we’d like is the gasket and the glass, proven on this later diagram from a 1944 components e-book the place the ammeter has been deleted and the headlamp swap moved to below the seat, with the brand new hello/lo pushbutton within the headlamp panel:

I’ve determined to make use of spherical part foam strip for the gasket; the glass is authentic, from Wali Taylor of the AOMCC.

The clip got here from eBay, however did not match till I gave it some consideration. The rim was filled with dents too, however with a panel beating hammer and a dolly I quickly had that smoothed out.

The clip is retained with a little bit of piano wire – that is about 2 mm in diameter:

Onto the bulb holder. This can be a army sample bulb holder – there is just one contact for the primary bulb, and I suppose I’ll make one other. Additionally very seen right here is the clamping screw that permits the bulb holder to maneuver backwards and forwards to place the filament on the main focus of the reflector.

Here is the view from the opposite facet. Wants a clear however it’s in good condition – it isn’t distorted in any respect.

Subsequent is the instrument & swap panel. That is the illustration within the guide:

That is the one which got here with the shell: it is a bit early for the W/NG because it has the becoming for the half cost resistor – that little casting between the ammeter and the swap gap:

This swap panel could be 1932-36, as the sooner H52 headlamp is sort of totally different and the half-charge resistor disappeared with the introduction of the MCR1 mechanical cost regulator in 1937. I would use this or maybe the repro one that’s fitted to the bike in the mean time.

There might be a little bit of wiring to do because the repro ammeter presently on the bike has terminal posts and ring terminals, and the headlamp is wired up with Japanese bullets:

I’ve chosen a CDRC Double Dipper Professional projector headlamp bulb:

That is the beam it produces, in an image taken on my telephone utilizing the ‘night time’ setting. You’ll be able to see it’s utilizing the excessive beam LED and the low beam LED:

The finished headlamp:

I will replace this publish because the venture strikes alongside.