Change fork reb target  
zeta_fkr_50-70.xlsx current fk reb target     .46-70s
  • chrtd = chrome tube drag
  • s = strait or linear
    • the zeta curve is mostly linear
  • 10 ips is focus for low speed r-zeta
  • Original baseline = .46-70s with 2.5 drag.
  • New baseline = .30-.65s to account for bushing drag.  See below.
zeta_backwards_fkc_fkr.xlsx change fk reb target    
  r-zeta factor    
   
openDynoFk__press_target.php  
 
  • Focus on 10 ips as critical for ls reb comparisons.
  • Minimum reb force and r-zeta at 3 - 10 - 40 - 70 ips.
  • 3136f with 2.5 chrtd
  •  3ips =     -4.1    [.71]
  • 10ips =   -16.8    [.62]
  • 40ips =   -65.3    [.55]
  • 70ips =  -118.0   [.55]
  
  • Low speed reb is inherently stiff by design.  You can only reduce it so much at 1-10ips using stk components and typical valving configurations.
  • If ls reb is too stiff, run faster hs reb to compensate.  The stiff ls will catch reb overshoot.
  • Reb target is based on 2.5 chrtd.  But recent findings show bushing drag adds another 7.5 lbs.
  • This added drag is most apparent at 10ips.
  • To compensate run a lighter target.
  • For example, comparing target at 10 and 70ips.
    • Target .46-70s, r-zeta = .71 - .70 with 2.5 drag
    • Target .46-70s, r-zeta = .79 - .71 with 5 drag.
  • Compensate by running a faster target.
    • Target .30-65s, r-zeta = .74 - .65 with 5 drag.