. The railroad and engineering journal . .:i- H 1 1 X ; : M 1 ! CO i I > 70 ijij H t * r^ 1 PI • 1 H ■» i H i! J H ■*• i G j| ; tc ■iJ s G It O G t/) I t CO o i f KH t- ■ 1 ra J I w 1 ; ^v.* ©MM om^M° ®@@@©@@ @@@@@@@ @@@ @@@@@@@ @@@©@@@ @@@©@@@ @@@@@@@ @@@@@@© @ 500 THE RAILROAD AND [November, 1890. 50 lbs. per as the weight allowable for the motor andIts supplies for such period of time as it is to consume inits trip. This does not greatly differ from the proportionin the pigeon, whose pectoral muscles weigh ](; of histotal weight, or 46^ lbs. per , including, it must berem
. The railroad and engineering journal . .:i- H 1 1 X ; : M 1 ! CO i I > 70 ijij H t * r^ 1 PI • 1 H ■» i H i! J H ■*• i G j| ; tc ■iJ s G It O G t/) I t CO o i f KH t- ■ 1 ra J I w 1 ; ^v.* ©MM om^M° ®@@@©@@ @@@@@@@ @@@ @@@@@@@ @@@©@@@ @@@©@@@ @@@@@@@ @@@@@@© @ 500 THE RAILROAD AND [November, 1890. 50 lbs. per as the weight allowable for the motor andIts supplies for such period of time as it is to consume inits trip. This does not greatly differ from the proportionin the pigeon, whose pectoral muscles weigh ](; of histotal weight, or 46^ lbs. per , including, it must beremembered, the stored-up energy which enables him toaccomplish long flights without alighting. Now, how does this compare with the weight of the en-gines manufactured by man ? There are three classes ofmotors now in general use : 1. Steam-engines. 2. Gas-engines. 3. Electric motors. The machines in common use, being designed chieflyfor strength and durability, are needlessly heavy, and it isonly by inquiring into what has been done for special pur-poses that we shall get an idea of their possibilities. Thus as to steam-engines : Ordinary stationary machinesweigh with their boilers from 500 to 1,600 lbs. per ;locomotives, from 200 to 300 lbs. ; marine engines fo
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectrailroa, bookyear1887
