照咁睇打蛋器都可以做船

david

呢隻船嘅兩個渦輪撥出嚟嘅水只係渦流, 各方向全對稱, 並無特定推向船尾, 船不能向前行, 根本就唔work.  要有嘢罩住佢, 在一邊開口導流, 咁先至work. 不過效率都重係低過螺旋槳.
揾隻舊鞋裝一個車葉和一個舵都行得好過佢啦. 媽子個D尖尖地頭嘅舊鞋就啱嘞, 去水D.

david

The Voith Schneider Propeller (VSP) propulsion system is an Austrian design of which two propulsion units are included. Each unit has a variable pitch propeller that is vertically mounted at the bottom of the hull so that its thrust can be varied both in magnitude and direction and hence provides propulsion and directional control of the boat. The amount and direction of thrust is controlled solely by varying the cycle pitch of the blades and the motor only needs to run at a constant speed and in one direction, regardless of the maneuver being contemplated.
The VSP system requires a minimum five channels to control the boat fully. Four control servos for the drive units (two for each) and one for the electronic speed controller.
Such sophisticated mechanism with complicated maneuverability are too difficult for those lazy people like me to manipulate. Is there any Rosenfans boatmate would like to try ?

david

It is rather expensive, just only one Voith Schneider drive (including the brushless motor) will cost you 235.95 Euros, that is about HK$2420. The twin motor system costs HK$4840, not to count in the 35 inches long 1:33 Graupner tug boat Parat, five servos, a multi-channel emitter and receiver, and the postage fee. The total sum will be more than $10000, that is too expensive. Does it worth to spend more than ten thousand dollars on such a toy ? Or if you want to give a hand to the economies of the Europeans just like our 強國女人 buying Louis Vuitton, Prada, Ferragamo,.... so enthusiastically and wholeheartedly in Paris and Rome. Haha, more than 80% must be paid by men, and the rest by the women themselves.