X-UAV ONE FPV

February 08, 2015, 08:42:30 pm

želite nešto egzotično a Inspire ONE vam je preskup?
nema problema, Kinezi imaju za svakoga ponešto

iz poznate firme nakon vrlo popularnog Talona i stiže nam jednostavno: ONE

(X-UAV ONE)

kao i inspire, i ovaj ima vrlo zanimljivo izveden pogonski sklop, nekonvencionalan u najmanju ruku

prop se vrti oko tailbooma a ne iznad njega

više info: http://www.foxtechfpv.com/xuav-one-fpv-plane-kitpreorder-p-1844.html

Quote

Although X-UAV have located their prop right behind the wing, with the boom-prop concept technically it could be ANYWHERE on the boom.
You want to double the weight of batteries/camera-gear in the nose? No problem, just slide the boom-prop mechanism further towards the tail to counter-balance. No dead-weight needed.
You could locate a boom-prop in-front of the wing (for quieter operation/greater efficiency), but still have camera gear out of prop view in-front of that!
How about multiple boom-props on the same boom? One spinning a huge prop slowly for maximum climb-rate, then switch to another much smaller prop for maximum cruising efficiency.
Two boom-props on the same boom counter-rotating?
Due to the reduction gearbox, smaller/lighter motors can be used. E.g. a 1000kv 500W motor will be lighter than a 500kv 500W motor.
Yes there’s the gearbox weight to consider, but my 3D printed gearbox weighed next to nothing.
A pusher-prop means the prop is out of camera view, but with most pusher-prop planes your prop size is limited (unless you want to chop your tail).
With the boom-prop there are no limits to prop size and since spinning a large prop slowly is a more efficient (and quieter) way of producing thrust than a small prop quickly, therein lies the advance.
No thrust angled needed. i.e. 100% of thrust generated by the pusher-prop goes into forward propulsion.
Conventional pusher-prop planes need to angle their prop to counter the moment of thrust. The larger the prop you use, the more angle you need. This is such a waste of energy; a conventional pusher-prop angled at just 18’ means 5% of your thrust wasted. At 25’ it’s 10%......."