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2. Electronic speed control - Wikipedia

   en.wikipedia.org/wiki/Electronic_speed_control

   The watertight structure is significantly different from that of non-marine type ESCs, with a more packed air trapping enclosure. Thus arises the need to cool the motor and ESC effectively to prevent rapid failure. Most marine-grade ESCs are cooled by circulated water run by the motor, or negative propeller vacuum near the drive shaft output.

3. Vacuum packing - Wikipedia

   en.wikipedia.org/wiki/Vacuum_packing

   External vacuum sealers involve a bag being attached to the vacuum-sealing machine externally. The machine will remove the air and seal the bag, which is all done outside the machine. A heat sealer is often used to seal the pack. Typically these units use a dry piston vacuum pump which is often considered a "maintenance-free" pump.

4. Materials for use in vacuum - Wikipedia

   en.wikipedia.org/wiki/Materials_for_use_in_vacuum

   It is easily machined and has good corrosion resistance. It is unsuitable for bakeable vacuum envelopes due to its tendency to oxidize and create scales. Copper rings are used in demountable seals. Normal copper is unsuitable for high vacuum as it is difficult to outgas completely. Copper is insensitive to hydrogen and impermeable to hydrogen ...

5. Electronic stability control - Wikipedia

   en.wikipedia.org/wiki/Electronic_stability_control

   Many ESC systems have an override switch so the driver can disable ESC, which may be used on loose surfaces such as mud or sand, or if using a small spare tire, which could interfere with the sensors. Some systems also offer an additional mode with raised thresholds, so that a driver can utilize the limits of their vehicle's grip with less ...

6. Brushless DC electric motor - Wikipedia

   en.wikipedia.org/wiki/Brushless_DC_electric_motor

   A brushless DC electric motor (BLDC), also known as an electronically commutated motor, is a synchronous motor using a direct current (DC) electric power supply. It uses an electronic controller to switch DC currents to the motor windings producing magnetic fields that effectively rotate in space and which the permanent magnet rotor follows.

7. Doubly fed electric machine - Wikipedia

   en.wikipedia.org/wiki/Doubly_fed_electric_machine

   It is possible to avoid the multiphase slip ring assembly, but there are problems with efficiency, cost and size. A better alternative is a brushless wound-rotor doubly fed electric machine. [12] Principle of a double-fed induction-generator connected to a wind turbine

8. Constant speed drive - Wikipedia

   en.wikipedia.org/wiki/Constant_Speed_Drive

   Constant speed drive for Boeing 727, made by Sundstrand Corporation. A constant speed drive (CSD) also known as a constant speed generator, is a type of transmission that takes an input shaft rotating at a wide range of speeds, delivering this power to an output shaft that rotates at a constant speed, despite the varying input.

9. Vacuum splint - Wikipedia

   en.wikipedia.org/wiki/Vacuum_splint

   Vacuum splint being applied to the leg of an injured skier A vacuum splint is a device like a small vacuum mattress that is used in emergency medicine as a temporary splint . Vacuum splints operate by extracting air from the splint itself to enable the thousands of polystyrene balls inside the splint to mold around the injured body part similar ...