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Ballast Lab Report

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Ballast should be less surface area so it has to be very dense to cause minimum drag. It should be placed on the finished ROV for small refinements in stability. It should not be metals (Copper or Tin) which occur chemical reactions between them. 3.4.5 Power The electrical power is used as the source of energy to drive the ROV’s components. We use 12 VDC (Volts Direct Current) in our ROV. This power is used to drive motors, GSM module, etc. In our ROV, there will be a pair of small wires one negative (-) and one positive (+), for each motor or other electronics and electrical component on our ROV. Industrial ROV’s use higher voltage up to 3000V which is supplied from the surface, but this high voltage from the surface is transformed to 48V, …show more content…

It’s also called as the blade root. • Pressure Face:- Pressure Face is the back face of the propeller blade. • Suction Face:- Suction Face is the forward face of the propeller blade. • Leading Edge:- Leading Edge is the blade edge adjacent to the forward end of the propeller hub. • Trailing Edge:- Trailing Edge is the blade edge adjacent to the aft (back) end of the propeller hub. • Blade Tip:- Blade Tip is the blade edge on the outermost radius of the propeller. • Emitter Holes:- Emitter Holes is the holes drilled into a channel near the leading edge. 3.4.6.1 Propeller Selection The size of a propeller is described using diameter and pitch. The pitch always follows the diameter when describing a propeller. 3.4.6.1.1 Diameter Diameter is two times the distance from the center of the hub to the tip of the blade. It also measured by the distance across the circle that the propeller would make when rotating. Figure 3.3: Diameter of Propeller\ Figure 3.2: Propeller Parts 3.4.6.1.2 Pitch Pitch is defined as the theoretical forward movement of a propeller during one revolution. Figure 3.4: Pitch of Propeller 3.4.6.1.3

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