[Spridgets] Which Generator?

[David Woerpel]

The Mk1 and 2 Sprites (Mk 1 Midget) used the mechanical tach and 
therefore the tach reduction gearbox which necessitated a long armature 
shaft and an extended rear plate.  The early ones had screw connectors 
which is a specific end plate.  Other than those parts all the C40's 
have interchangeable parts (even those with stepped cases).  There are 
differences in front bearing mounts.   Fan styles changed but are 
interchangeable. Pulley diameters were determined by application. Some 
like to put on a smaller pulley to try to get more output from the 
generator.  It sounds like the dynamo in question is a mix 'n match.  
The longer armature will fit in the non-tach drive /case/ but requires 
the tach drive rear plate.  After market companies made the same parts 
but the design might be different.  Also /modern /"Lucas" TYPE gennys 
have a different armature shaft diameter (read, metric) and cannot be 
use with the original type genny.

That ought to muddy the waters.
Dave
59 :{)
Burlington WI


Jack Laird wrote:
> something someone modified.
>
>
> ----- Original Message ----- From: "rrengineer @dslextreme.com" 
> <rrengineer at dslextreme.com>
>
>> I was given a generator by a restorer friend of mine because he 
>> thought he
>> had no need of it.  I am trying to dertemine what I have here, so you
>> experts out there can start guessing.
>> It is a C40, not a C40-1.  It has the extended rear threaded rear end 
>> for
>> the gear reduction gear box with external brass oiler.  The electrical
>> connections are spade type and look like they were designed for this 
>> rear
>> plate.  the front plate has the ribs inboard.  The main body transitions
>> down about a quarter inch in diameter for the rear 2 inches or so.  
>> It is
>> dated 11-65?  What the heck doI have?  Oh, yeah, it turns very 
>> freely, so
>> freely, I think the brushes are worn out.
>> Mike MacLean
>> 60 Sprite
>> 56 BN2