07-05-2021, 10:31 AM
(This post was last modified: 07-05-2021, 10:38 AM by Bob Culver.)
I woud have expected the design to come from R and M or SKF. It is near my bedtime and my brain is starting to smoke. Presumably nuetral, top, third selection is by moving the mainshaft axially? What gives it the silent feature? Are internal gears inherently quieter? It has acquired the very considerable complexity of a second layshaft surrounding the output mainshaft. Maybe it is what draughtsmen did for amusement in their lunch breaks. The designer was probably familair with hand lawnmowers.
Silent 3rds were fashionable around 1931 acheived wth constant mesh helical or double helical gears as the late RN, early RP? Dunno how helical gears are depicted. Teeth have rounded corners more typical of sliding mesh teeth.
There is a vast difference in machining complexity between the simple 1920s box and the 1933 synchro box
Silent 3rds were fashionable around 1931 acheived wth constant mesh helical or double helical gears as the late RN, early RP? Dunno how helical gears are depicted. Teeth have rounded corners more typical of sliding mesh teeth.
There is a vast difference in machining complexity between the simple 1920s box and the 1933 synchro box