Difference between revisions of "Johnson Scorpion Fishing Reel"

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(Engineering Specifications)
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2. Ease to use will be how long it takes to assemble on a pole. (# of steps)
2. Ease to use will be how long it takes to assemble on a pole. (# of steps)
3. Want to see how much of a fish pulling until fatigue occurs on the reel. (N/lbs)
3. Fatigue life (cycles until failure)

Revision as of 15:42, 5 February 2008



Product Description

This is the Scorpion Fishing Reel made by Johnson.

Replacement fishing reel for loosening/tightening fishing line. This is accomplished by human power as a crank (gear) which through a series of conversions spins and translates the reel to allow fishing line to be released or tightened.

Johnson has a wide variety of fishing reels, this being one of the lower price/quality ($7).

User Requirements

1. Durability and reliability - people who purchase this product do not want the product to be unable to perform its intended purpose or to altogether fail.

2. Aesthetics – purchasers are going to be more likely to buy the product if it is more attractive.

3. Ease of use – the reel needs to be simple and easy to use, shouldn’t require large amounts of time to assemble to the rod or to change lines.

4. The new reel must be able to fit on the most fishing pools

Engineering Specifications

1. Must have reel large enough to fit fishing lines. (inches of width and depth)

2. Ease to use will be how long it takes to assemble on a pole. (# of steps)

3. Fatigue life (cycles until failure)


The table belows lists the Bill of Materials for the Scorpion Fishing Reel:

Table 1: Scorpion Fishing Reel Bill of Materials
Part # Part Name # Category Function Material Picture
1 Pick up or Bail Support Element Locking Mechanism for Line (if over line, line is locked into place, if behind, in position for casting) Metal
2 Spindle Output Holds wound line, or when turning reel handle, will spin to retract line. Plastic
3 Drag Adjustment Knobs Support Element Adjusts tightness of the line. Allows line to “play out” when line is pulled. Plastic (Exterior)

Metal (Interior)

4 Bail Spring Support Elements Applies force against the Bail when engaged. Metal/Plastic
5 Bail Lever Motion Conversion Element Unlocks spindle from gearbox. Metal
6 Plastic Casings Structural To add a shine to the appearance of the reel. Plastic
7 Spindle Housing Structural/ Motion Conversion Element Protects drive shaft and spins the bail. Plastic
8 Power wheel/gear Transmission Transfers power from handle to drive shaft and scotch yoke. Metal
9 Handle Input Applies external force to power wheel. Plastic
10 Yoke Shaft Support Element Moves spindle up and down. Metal
11 Clutch Transmission Stops spindle from rotating in on direction when engaged. Metal
12 Drive Shaft Motion Conversion/Support Element Transfers energy from power wheel to spin spindle. Metal
13 Scotch Yoke Transmission Converts angular energy from power wheel to move the spindle linearly. Metal
14 Screws Structural Holds Parts Together Metal
15 Mechanism Casing Structural Outer shell, protects mechanisms, attaches reel to rod. Plastic