, . h = 4 8 ( ) ℓ = (2 3) ℓ, ℓ . .
, , , (, , ) .
, . (. 26.7, ). . ( ) . max, R ( ) .
()
max = R + Cmax m, (26.15)
max = ; (26.16) m , , ; , ( = 2.5 )
( 180) . , 110 - 120.
, (. 26.7, ). . . () d , b, α:
H = [R 0.5d b h (ctg + ctgα) P] + H. (26.17)
26.7
(26.15), m . 135. , .
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(. 26.7, ) . . . .
, 26.7, , , ; . ( ) (26.15), (26.17), .
7 . 3/ .
(. 26.7, ) 0.8 0.9. , , ; 90 ( 60). () D- D- . ( . 26.7, ) 4 , ( , ). , . , .
, (. 26.7, ), , . 4 6 .
()
= 2 m P H ctg . (26.18)
() (. 26.7, ).
- . 1 3 . . 4 20 3.
3 7 , . ( ). , 300 . 30 40 , , . , .
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: ( ), , 1 3 , , , , , , 10 3 .