Hi All,
Can anyone throw any light on the machine in the attached photo? For many years, this was thought to have been just a design exercise and that the bike never actually existed, but recently, I came by the bottom end of an engine of this type. Having cleaned it up, I found that all holes for studs, etc. have been marked out and bench drilled - so, probably produced prior to any jigs being made. Generally, the layout is the same as the T35 engine but the flywheel assembly is a smaller version of that in the DV60, and the barrels and heads look to be as used on the generator engines of the period (1939/40). The timing gears have a different pitch (14DP) to the later engines and the front camshaft bushes are flanged and much larger to allow camshaft removal without splitting the crankcases. Ignition is provided by a BTH Dynamag.
From the drawing, most parts look to be fairly easily replicated - the biggest problem will be the gearbox. Can anyone help with any details? There are 2 possibilities - the gearbox may be similar to the early T35 'box or could have the bevel gears on the input shaft (as on the DV60) - so that the shafts lay across the frame. From the crankcase castings, I have established that the bellhousing flange turns out (rather than inward as on the T35) and there are 8 equi-spaced 5/16" studs for attachment.
Any help will be greatly appreciated,
Regards,
Eddie.