136 



HANDBOOK OF MECHANICAL DESIGN 



FORM FOR SPRING DESIGN CALCULATIONS 



SPRING DESIGN 



Drg.No. S-2494 class _Z_ Rate ^0 Max.O.D. .Am. Min.I.D. 



Pitch 0-550 F.L. ^4 mwi 3.325 Material MS-/2 

 Length of arm Length of rod Max.def. 



// 



Size 0.24-3 7 d/am. 



^, 3.32 S- OSS' ,^ ,^ 



^- q56s ^"^-^^ 



FL-MWL = 2.925 



CALCULATIONS 



Max.O.D.+ Mfn.I.D 



■=2.015 



(D-d) = 



G X d X Fn /1 500,000 x.0. 00352 7x 2. 925 



P = ■ = ~ = /Tg 



8x(D-d)^xN 8x8.2x/0.35 



_P__ 175 - 

 Ra+e= Fn 2.925 



, , 6.25-0.55 



Pitch = - — 



60 



S = 



2.015x175 



>. 1.18 =73.200 



W.35 



-= 0.550 



0.3927x0.01447 

 SoUd length = (10.35 '^ 2.25) %.0.2437 = 3.07 



ACTUAL VALUES 



F.L. ^32 N /QS" Load 5(g Def. _ll Solid length 



O.D 



^3Z d 0.2^ 



Set 6# Average of 10 Springs Total turn I3_ Manufactured by W D. GIBSON 



200 



5 4 3.32 3 



Lengthy Inches 



Original by 

 6RE. 



Date 

 2-9'3& 



APPROVED BY 



Checked by 

 AND. 



DATE ISSUED 

 April 17, 1936 



Date 

 2-25-36 



SUPERSEDING 



Tested by 

 GAV7. 



SUPERSEDED BY 



Date 

 3-25-36 



z 



REVISION DATES 



