80 BULLETIN 711, U. S. DEPARTMENT OF AGRICULTURE. 
Table 10. — Tandem drum logging engines. 
Capacity of drums. 
Dimensions. 
Size of line. 
Inches. 
"»» $$ 
"**» {xrf, 
W fe 
9} by 10 fe 
io by ii ;{«f; 
«»*« te 
iobyi2 ^ 
«"»» te 
if Main 
10 by 15 {Main 
1 1 Trip, 
/Main 
(Trip, 
/Main 
ITrip, 
/Main. 
ITrip, 
(Main 
11 by 13 UMain 
i I Trip, 
! (Main 
11 by 13. rfMain: 
1 1 Trip,' 
»"yi3 fe 
"fcy» fe 
'2 by 12 fe 
I [Main 
<Main 
(Trip, 
Mam 
< Main 
I Trip, 
/Main 
\Trip, 
[Main 
12 by 14 {Main 
[Trip 
12 by 14 
10i by 12 
10£ by 12 
11 by 12. 
12byl2 
12 by 13 
13 by 13 
12 by 14. 
|/Main 
•••ilTnp, 
I /Main 
---jlTrip, 
I [Main 
13 by 14 \\iSaid 
I ITrip, 
"**» ttgg 
""yis fe 
Feet. 
,2,250.. 
5.340... 
,2,950.. 
5,300... 
,2,150., 
5.340... 
,2,900., 
6,500... 
,3,000. 
6,900... 
,3,150.. 
7,550... 
,4,000. 
10,000.. 
,4,000. 
8,200... 
,3,750. 
,4,660. 
10,100.. 
,2,800. 
7,550... 
,2,100. 
3,700.. 
,3,700. 
8,250.. 
,4,080. 
,5,380. 
10,600.. 
5,500. 
4,500. 
8,500... 
,3,100. 
6,400.. 
,5,900. 
11,300.. 
,3,000. 
7,000.. 
,4,070. 
,5,400. 
9,850.. 
,4,070. 
,5,400. 
9,850.. 
,6,500. 
14,400.. 
,4,380. 
,5,100. 
13,850. 
,6,900. 
10,500.. 
,3,300. 
7,400.. 
,6,500. 
,8,000. 
12,800. 
8,100. 
21,400.. 
,8,500. 
21,500.. 
Size of boilers. 
48 by 103 higb, 175-pound 
jj working pressure. 
|}s4 by 106 high 
i\54 by 125 high, 175-pound 
1/ working pressure. 
:"I56 by 124 high, 200-pound 
]/ working pressure. 
|}e0 by 126 high 
,54 by 125 high, 175-pound 
working pressure. 
>66 by 120 high. 
i6 by 125 high. 
38 by 147 high. 
^60 by 135 high, 200-pound 
working pressure. 
^60 by 135 high, 200-pound 
working pressure. 
^62 by 132 high, 200-pound 
working pressure. 
y 68 by 147 high, 200-pound 
working pressure. 
>66 by 125 high. 
^68 by 144 high, 200-pound 
working pressure. 
►66 by 120 high 
►72 by 120 high 
1 68 by 147 high, 200-pound 
| working pressure. 
1,68 by 147 high, 200-pound 
f working pressure. 
1 74 by 144 high, 200-pound 
I working pressure. 
1 72 by 147 high, 200-pound 
| working pressure. 
68 by 144 high, 200-pound 
working pressure. 
80 by 153 high, 200-pound 
working pressure. 
Speed of 
lines. 
Feet -per 
minute. 
Blain, 400... 
\Trip,470... 
/Main, 350... 
\Trip, 470... 
/Main, 400... 
\Trip, 500... 
Main, 422... 
/Main, 357... 
\Trip, 445... 
/Main, 430... 
\Trip, 560... 
/Main, 380... 
\Trip, 513... 
/Main, 400... 
\Trip, 490... 
/Main, 377... 
ITrip, 455... 
/Main, 390... 
\Trip, 595... 
/Main, 430... 
\Trip, 625... 
/Main, 430... 
\Trip, 500... 
/Main, 395... 
\Trip, 550... 
/Main, 435... 
\Trip, 600... 
/Lower, 460. 
\Trip, 520... 
/Main, 465... 
\Trip, 825... 
\Main,445... 
/Trip, 496... 
/Main, 445. 
\Trip, 496.. 
/Main. 565. 
\Trip,'735.. 
/Main, 452. 
\Trip, 567.. 
/Main, 420. 
\Trip, 530.. 
/Main, 558. 
\Trip, 605.. 
/Main, 500. 
\Trip, 550.. 
Weight. 
Net price 
f. o. b. 
Portland, 
Tacoma, 
or Seattle. 
:} 
\Main, 630. 
/Trip, 885. 
Pounds. 
\ 18,000 
19, 500 
20, 500 
26,000 
28, 000 
27, 000 
32,000 
34,200 
32,500 
31,500 
32,000 
36, 500 
40,000 
37,000 
40, 000 
37, 000 
40,000 
42, 000 
45, 000 
50,000 
51, 000 
50,000 
42,000 
43,000 
60,000 
65,000 
Logging engine repair parts and materials. — All operators find it 
desirable to carry in .stock a few duplicates of the small paTts of 
logging engines that are most likely to fail. The fixed investment in 
such parts varies with the ideas of the management and the distance 
the operation is from points where repair parts can be purchased. 
For the purpose of a timber appraisal, the capital invested in this 
way may be placed at $100 per yarding engine. 
