80 BULLETIN 711, U. S. DEPABTMENT OF AGEICULTURE. 



Table 10. — Tandem dnim logging engines. 



Capacity of ilnims. 



Speed of 

 lines. 



Weight. 



Inches. 



9^yio p$: 



9byioi fe 



9i^yio i{^^ 



9ibyl0 te 



10 by 11 i-^^^^i" 



10 by 12 



10 by 12 



10 by 13 



10 by 15 



10ibyl2... 

 10ibyl2... 

 Ilbvl2 



\Trip. 

 /Main 

 ITrip. 

 /Mam 

 \Trip, 

 /Main 

 \Trip, 

 (Main 

 <Maln 

 ITrip, 

 /Mam 

 ITrip, 

 /Main 

 ITrip, 

 /Mam 

 ITrip, 

 (Main 



11 by 13 '-^Main 



I ITrip, 

 (Main, 



11 by 13 -^Maia 



ITrip 



^i^Ti3 te 



11 ^y" te 



i2^^yi2 {^iTp" 



(Mam 

 <Main 

 ITrip, 

 (Mam 

 < Main 

 ITrip, 

 /Mam 

 ITrip, 

 (Mam 

 ■{Main 

 ITrip, 

 /Mam 

 \Trip, 

 I/Mam 

 I ITrip, 

 (Mam 



13 by 14 <^Main 



iTrip, 



"^^yi^ -te 



"i^yis te 



12 by 12. 



12 by 13. 



13 by 13. 



12 by 14. 



12 by 14. 

 12 by 14. 



Feet. 

 ,2,250.. 

 5,340... 

 ,2,950., 

 5,300... 

 .2,150.. 

 5.340... 

 ,2,900.. 

 6,500... 

 ,3,000.. 

 6,900... 

 ,3,1.50.. 

 7,550... 

 ,4,000.. 

 10,000.. 

 ,4,000.. 

 8,200... 

 ,3,750.. 

 ,4,660.. 

 10,100.. 

 ,2,800.. 

 7,5.50... 

 ,2,100.. 

 3,700... 

 ,3,700.. 

 8,250... 

 ,4,080.. 

 5,380., 

 10,600.. 

 ,5,500.. 

 ,4,500.. 

 S,.500... 

 ,3,100.. 

 6,400... 

 ,.5,900.. 

 11,300.. 

 ,3,000.. 

 7,000... 

 ,4,070.. 

 ,5,400.. 

 9,8.50... 

 ,4,070.. 

 ,5,400., 

 9,850... 

 ,6,500.. 

 14,400.. 

 ,4,380.. 

 ,.5,100.. 

 13,850.. 

 ,6,900., 

 10,.500.. 

 ,3,.300., 

 7,400.., 

 ,0,500., 

 8,000., 

 12,.S00.. 

 ,8,100. 

 21,400.. 

 ,8,500., 

 21,.500.. 



Inches. 



Inches. 



|U8 by 103 high, 175-pound 

 1/ working pressure. 



!}.54 by 106 high. 



Il 54 by 125 high, 175-pound 



j/ working pressure. 



|\.56 by 124 high, 200-pound 



working pressure. 



jfiO by 126 high. 



" ,54 by 125 high, 175-pouDd 

 working pressure. 



66 by 120 high 



}■ 

 }■ 



|66 by 125 high. 

 ; by 147 high. 



60 by 135 high, 200-pound 

 I working pressure. 

 160 by 135 high, 200-pound 

 I working pressure. 

 1.62 by 132 high, 200-pound 

 working pressure. 



,68 by 147 high, 200-pound 

 working pressure. 



iby 125 high 



i68 by 144 high, 200-pound 

 I working pressure. 



}-66 by 120 high 



^72 by 120 high 



68 by 147 high, 200-pound 

 working pressure. 



8 by 147 high, 200-poiuid 

 working pressure. 



I\74 by 144 high, 200-pound 

 1/ working pres.'nire. 



72 by 147 high, 200-pound 

 working pressure. 



8 by 144 high, 200-pound 

 working pressure. 



SO by 153 high, 200-pound 

 working pressure. 



Feet per 



minute. 



/Main, 400.., 



\Trip, 470... 



/Main, 350... 

 \Trip, 470... 

 /Main, 400. . . 

 \Trip, 500... 



Main, 422... 



/Main, 357... 

 ITrip, 445 .. . 

 /Mam, 430... 

 \Trip, 560... 

 /Main, 380... 

 \Trip, 513... 



/Main, 400... 

 \Trip, 490... 



/Main, 377... 

 \Trip, 455 .. . 

 /Main, 390... 

 \Trip, 595... 

 /Mam, 430... 

 \Trip, 625... 



/Main, 430... 

 \Trip, 500... 



/■Main, 39.5... 

 \Trip, 550... 



/Mam, 435... 

 \Trip, 600... 

 /Lower, 460. 

 \Trip, 520... 

 /Main, 465. . . 

 \Trip, 825... 



\Main,445... 

 /Trip, 496... 



/"Main, 44.5.. 

 \Trip, 496.. 



/Mam, 56.5.. 

 \Trip, 735.. 



/Main, 4.52.. 

 \Trip, 567.. 



/Main, 420.. 

 \Trip, 530.. 

 /Mam, 558.. 

 \Trip, 605.. 



/Main, .500.. 

 \Trip, 560.. 



\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 

 I 65,000 



Logging engine repair parts and materials. — All operators find it 

 desirable to carry in stock a few duplicates of the small parts 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. 



