M21 Work  ReStart Summer 2019
       -------------------------------

                                      Initial Rev.    Jully-2019
                                      Current Rev.  21-Sept-2019

July 2019:

StepUp Controller and Switch:  LTC 3787      TK8P2A06PL



Verified Sprocket Tooth Counts:

   Engine Sprocket        20 t    -
   Clutch Chain Wheel     43 t    -\  Ratio  2.1500

   Transmission Output    19 t    -
   Rear Wheel Sprocket    42 t    -\  Ratio  2.2105

So in 4th gear this is an overall ratio of:  4.7526


Both front and rear wheels are  3.25" x 19"  K70
(Dunlops I think)  on what are probably Jones WM2 rims.

The measured circumference of the rear wheel is about  82.5"
I do not know what the actual rolling circumference is but
for now call this  82".  This gives about  773 turns per mile.

                              mph
773 turn/mile  x  4.7526  x  -----  =  Engine RPM per mph
                               60      in straight through
                                       4th gear

  --->  61.23 Engine RPM per mph in top gear



Verified Tooth Counts:

   Magneto Gear Driving Dynamo   58 t    -
   Driven Gear on the Dynamo     22 t    -\  Ratio  2.6364

Magneto runs at 1/2 of the Engine RPM  so
the Dynamo runs at  1.3182  x  Engine RPM.



Survey While Packing Up to Move Out of Lab C:
----------------------------------------------

 - Survey of M21 parts done while organizing and
   packing up indicates that the following are missing:

     DriveSide Outer Shim   66-661  or  66-0661
     I think that this motor may not have had one of these
     installed

     Rod Small End Bushing   66-491  or  66-0491

     Crush Drive   Spacer    65-2540
                   Shim      66-1707  or  66-1708

     Inlet Tappet     66-1493    I have an inlet tappet
     but its foot is in bad shape.  Depending on the
     shape of the cams then also an exhaust tappet ?

     Gasket Set  -  if I have one where is it ?

     Screws to hold on the timing cover - I think that
     my update for these is  1 1/4"  1/4-20  aller head
     but where are they ?

     What other places have I randomly left parts in ?


 - A number of parts need a final polish before engine
   re-assembly could start:

     Cam followers  (tappets)  foot and shank

     Shafts for the Cams and Idler gear

     Rod big end outer shell

     Crank pin bearing surface

     Tappet Adjustment Caps


 - There is still the question / problem of the DriveSide
   Flywheel and Shaft.  I tested it in the lath and it is
   very obviously screwed up.  Where and what is bent ?
   Where all of the parts OK and then I screwed them up
   during assembly when I used two index pins that got
   stuck and may have bent things up ?   During the official
   alignment proceedure what is supposed to bend when one
   hammers it:  shafts ?   wheel webs ?   the pin to wheel fit ?
   the shaft to wheel fit ?


 - The oil pump is not in working condition.  It has all been
   cleaned up but it does not turn freely.  This whole zink
   casting setup is a mess.  I think that it some what locked
   up on final re-assembly with a minimum of Permetex applied
   to seal it from leaks.


 - Recall that there is a necessary re-assembly order:

     ....
     Install the Tappet Guides
     Install the Tappets
     Install the Shafts for the Cams and Idler Gear
     ....