1 ( ), , ( ) 7.1 ( 14).
2 65.
3 7.1 ( 5).
7.1
| f, | , | ||||
| 1/9* | 1/9 | 4,8 | 1/9 200 | ||
| 1/11 | 1/11 | 4,5 | 5,0 | 1/11 300 | |
| 1/12 | 1/12 | 5,25 | 5,3 | 1/12 350 | |
| 1/13 | 1/13 | 6,25 | 5,5 | 1/13 400 | |
| 1/14 | 1/14 | 12,5 | 6,0 | 1/14 500 | |
| 1/15 | 1/15 | 4,8 | 1/15 600 | ||
| 1/16 | 1/16 | 4,5 | 5,0 | 1/16 800 | |
| 1/18 | 1/18 | 5,25 | 5,3 | 1/18 1000 | |
| 1/20 | 1/20 | 6,25 | 5,5 | 1/20 1200 | |
| 1/22 | 1/22 | 12,5 | 6,0 | 1/22 1500 |
* , .
. . , .
, , 7.1.
7.2. ( ), (), . , ( ). , . 7.2 1/9.
. . 7.3. 65 7.2.
7.2 ( 65)
| , , | ||
| sin a | b |
| 1/9 | 6 20' 23'' | 15,19 | 15,85 | |
| 1/11 | 5 11' 40'' | 14,02 | 19,35 | |
| 1/12 | 4 47' 06'' | 12,71 | 20,80 | |
| 1/13 | 4 24' 57'' | 13,88 | 22,75 | |
| 1/14 | 4 5' 58'' | 12,28 | 24,50 | |
| 1/15 | 3 48' 50'' | 18,42 | 26,18 | |
| 1/16 | 3 34' 51'' | 18,69 | 27,69 | |
| 1/18 | 3 10' 13'' | 25,56 | 31,96 | |
| 1/20 | 2 51' 39'' | 21,97 | 33,73 | |
| 1/22 | 2 35' 50'' | 31,86 | 39,26 |
|
|
|
.7.1
.7.2,7.3
(. 7.3 I-III) . (. 7.3 IV V) . :
= / sin(a), (7.1)
.
sin(a) , .
, :
f = x a 2 b 1. (7.2)
:
f = x b 1 b 2. (7.3)
4,5 . 4,5 ( 7.1), , , b, f.
( 7.4.)
7.4
f, :
F = e / sin(a) b T, (7.4)
( ) ( ), :
T = R tg(a / 2) (7.5)
T = R / (2 N) (7.6)
R ;
1/ N .
.
8
