when is a spinning rod and reel used
Fishing rod Spinning rods are made from graphite or fiberglass with a cork or PVC foam handle, and tend to be between 5 and 8.5 feet (1.5â€“2.6 m) in length. Typically, spinning rods have anywhere from 5-8 guides arranged along the underside of the rod to help control the line. The eyes decrease in size from the handle to the tip, with the one nearest the handle usually much larger than the rest to allow less friction as the coiled line comes off the reel, and to gather the very large loops of line that come off the spinning reel's spool. Unlike bait casting and spin casting reels, the spinning reel hangs beneath the rod rather than sitting on top, and is held in place with a sliding or locking reel seat.[18] The fisherman's second and third fingers straddle the "leg" of the reel where it is attached to the reel seat on the rod, and the weight of the reel hangs beneath the rod, which makes for a more comfortable way to fish for extended periods. This also allows the rod to be held in the fisherman's dominant hand (the handle on most modern spinning reels is reversible) which greatly increases control and nuance applied to the rod itself. Spinning rods and reels are widely used in fishing for popular North American sport fish including bass, trout, pike and walleye. Popular targets for spinning in the UK and European continent are pike, perch, eel and zander (walleye). Longer spinning rods with elongated grip handles for two-handed casting are frequently employed for saltwater or steelhead and salmon fishing. Spinning rods are also widely used for trolling and still fishing with live bait.
Brushed DC electric motor The series motor responds to increased load by slowing down; the current increases and the torque rises in proportional to the square of the current since the same current flows in both the armature and the field windings. If the motor is stalled, the current is limited only by the total resistance of the windings and the torque can be very high, but there is a danger of the windings becoming overheated. Series wound motors were widely used as traction motors in rail transport[15] of every kind, but are being phased out in favour of power inverter-fed AC induction motors. The counter emf aids the armature resistance to limit the current through the armature. When power is first applied to a motor, the armature does not rotate, the counter emf is zero and the only factor limiting the armature current is the armature resistance.[16] As the prospective current through the armature is very large, the need arises for an additional resistance in series with the armature to limit the current until the motor rotation can build up the counter emf. As the motor rotation builds up, the resistance is gradually cut out.