HEMI Technical Info

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Lockup (secondary) Arms

Primary arms installed.
Lockup (secondary) arm slot .250" wide 
note inside edge of pressure plates clearanced for arms to be held further forward - not to interfere
   with primary "neutral".
Primary arms installed.
Lockup (secondary) arm slot .double wide for 2 arms
note inside edge of pressure plates clearanced for arms to be held further forward - not to interfere
   with primary "neutral" and donut underneath is also clearanced and has only 1 carbide button .
top left - diference between primary and lockup arms.
top right - set up lockup arms (12) 1 inch difference from 1st to last
        (cannon will have to move 1" PLUS wear and a little extra for safety ) to clear all arms
bottom center - 2 arms on 1 pin, "caution" be carfull not to lock arms together wit stud for adding
           weight, also note 1   nut and 1 half nut.
bottom right - tapered arms (clearance, weight ?)

Some Common Weights 
1"  studs = 7.2 Grams                        
.75" studs = 5.4 Grams    
.5"  studs = 3.6 Grams    

5/16 standard nuts --> .250"  = 4 Grams
5/16 1/2  nuts   --> .185"    = 3 Grams
5/16 ground nuts --> .150"    = 2.4 Grams

5/16 .560 od washers --> .030"  = .6 Grams
5/16 .560 od washers --> .060"  = 1.2 Grams

Stops:
This allows for unloading of arms - as disk wears the arms will be stopped and less force will result
 then as cannon continues to move arms will be again added......
 
A "Lockuo" clutch for alcohol engine...... arms and over center spring act as a latch...
Note: this is a pedal clutch (springs are under covers and add pressure )