Why is the hp of a diesel engine rated only half that of an electric engine to power a hydraulic pump?
You need a 20hp diesel engine to power a hydraulic motor, while a 10-hp electric motor will do the same job.
the reason for this is that the internal combustion engine has a pronounced lack of flexibility in its torque band. in practice this tends to be less of an issue with diesels since they have to breath very well at high speeds as well as starting speeds but the torque is inconsistent none the less. electric motors often have limited torque at certain speeds as well but its not as big of an issue most often. there is also the matter of loss of power due to higher air temperature and altitude. the rule is usually to use an engine that will put out enough power even at almost 10000 ft in warm weather. also there is the fact that power will be lost as the engine wears out. but i must say i would guess that a 15hp diesel would do the job of a 10 hp motor ok im not sure why 20 is needed. its good to have extra though.
give me an site about diesel engine outboard fishing boat ?
i want buy a diesel engine fishing boat . but i dont which model is best for fishing boat ? please say which model is better and how can i see its picture and information?
the latest diesel is the new yamaha 4 cylinder engine. check the web sites for marine engines. a good start is 'marine engines .com ' diesels are heavier than gasoline so the boat will be stonger construction. the new yamaha is aboout 20,000 dollars and with the stronger hull, your cost will be higher than gas but you will save on fuel cost. diesel will give you more miles per gallon.
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