PART THREE OF BILLY BARNES STEAM MOTOR BIKE LAND SPEED RECORD

                                        Billy Barnes Land Speed Record
                                                        by Rick Heinig
                             credit to the Steam Automobile Club of America

​                                                          PART THREE

                                                              BELOW
​10 HP Valve Simulation Initial - The first view of the D-slide valve establishes the valve and its steam and exhaust lap.  It is centered over the port openings.  The second view is to establish the 135 Degree angle from the eccentric picture exercise.  This establishes the lead on the engine.
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                                                                         BELOW
​10 HP Valve Simulation - This shows the valve movement starting with the piston at top-dead
-center.  The establishment of the eccentric angle (lead) and lap shows the 50% cut off.  I believe that the design intent is to establish the lead angle first and then determine lap to get the proper cut-off.
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                                                                      BELOW
​Crank Throw Angle - using a picture and paintbrush, this identifies the crank throw angle relative to the key way.  ​

                                                                    BELOW
​ Eccentric Angle - picture shows the eccentric angle relative to the key way.  The relationship between the key way establishes the 135 Degree angle between the crank and eccentric.  This happens to be a key feature to establish the 50% cut off in the 10 HP Stanley Steam Engine.