Originally Posted by bartiny
How can 1lb of thrust = 1.5-2hp? if that is the case then a little 17lbs thrust electric motor is equal to app. 25>34hp?
oooh... all excited coz the 1003 has a static thrust of 67lb so thats like MASSIVE power...
Would that be because thrust is effectively a measure of pressure rather than workdone but horse power is work done (i.e. pressure applied over a defined period of time)
Bieny's 1003 has a stated propulsion power of 480W which is 480Nm/s. 1HP = 550ft.Lb/s which seems to often be translated to about 750Nm/s. i.e. 1HP = 750W of OUTPUT power. By my calculations that makes it about 2/3rd HP.
Oh and based on Jeepster's principle he thinks the energy applied all comes out the engine and then 30% is lost by the prop. Well the 1003 consumes 1000W to give you 480W.
The 1003 has ~ 500Wh battery so in theory you could run the motor max out for 30mins. You'd muller the battery doing that though! So probably more like 20mins...