So, a recent request for me to make masters of 2 early machines came as an interesting notion. These were to be used as scenic accessories on a model railway layout which was to have a model airfield on it.
A Triumph Model H and a Douglas 4HP and sidecar.
I drew up the Triumph first, but left the steering head area as I couldn't follow what was happening on the photos I had. I could see no conventional means of support for the Girder forks. Only a horizontal spring, oddly and a mess of bits and pieces and more often than not a leather belt wound tightly round the business area.
I have spent most of the afternoon hunting for photos of this area and finally found out what I thought must be the answer, but wouldn't allow myself to believe.
But, sure enough, I was right in the first place. A horizontal spring decrees a horizontal movement.
The 1916 Triumph Model H motorcycle is not so much suspended, but isolated, from the worst exigencies of horizontal forces. Pretty much we're talking a method, in that early, rarely metalled roads era, of stopping the flimsy forks from simply snapping off after a few miles!
The forks, showing the only two pivots on the front "suspension". One for the horizontal spring which, by the way, just as oddly, works in tension and the main pivot for the whole forks assembly, allowing the front wheel to jiggle fore and aft. Your backside relies upon the two large springs on the Brooks saddle! Pure bicycle.