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Last updated: Nov 11, 2000
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"Fat Boy" Duration

(adopted from the SARA rules by Alan Estenson)

1.0 General Rules

  1. The object of this event is to achieve the longest combined flight duration.
  2. Two official flights are permitted. The total flight duration for both flights is the score.
  3. Timing and other scoring rules are per the NAR "Pink Book".

2.0 Stock "Fat Boy" Duration

  1. The model shall have the same length, diameter, fin shape and number, and therefore overall appearance as a stock "Fatboy".
  2. The model shall use the same nose cone as supplied by Estes in the "Fat Boy" kit. Modifications may be made that do not alter the shape of the nose cone forward of the shoulder, beyond what would be incurred through normal finishing (sanding, priming, and/or painting.)
  3. The model shall use commercial body tubing; no vellum, fiberglass, or other material(s) may be substituted for the airframe.
  4. Fin material is of the competitor's choice.
  5. There are no restrictions on internal modifications to the model.
  6. Recovery system shall be at least one parachute of a size and material of the competitor's choice.
  7. Propulsion shall be a "C" black powder motor (e.g. C6-3, C6-5, C11-3, C11-5, etc) of any certified manufacture.
  8. Models shall be launched from a launch rod; no towers, pistons, or rails permitted. Launch lug diameter is of the competitor's choice. "Pop Lugs" are permitted.

3.0 Pro Stock "Fat Boy" Duration

  1. The model shall have the same length as a stock Fatboy.
  2. The model shall use the same nose cone as supplied by Estes in the "Fat Boy" kit. Modifications may be made that do not alter the shape of the nose cone forward of the shoulder, beyond what would be incurred through normal finishing (sanding, priming, and/or painting.)
  3. The model's airframe may be of any suitable material i.e., paper, plastic, vellum, fiberglass.
  4. Fin material and fin shape is of the competitor's choice.
  5. There are no restrictions on internal modifications to the model.
  6. Recovery system shall be at least one parachute of a size and material of the competitor's choice.
  7. Propulsion shall be any certified 18mm "C" motor.
  8. Models may be launched from a launch rod, rail or tower. Use of pistons is permitted.

4.0 Top Fuel Unlimited "Fat Boy" Duration

  1. The model shall use the same nose cone as supplied by Estes in the "Fat Boy" kit. Modifications may be made that do not alter the shape of the nose cone forward of the shoulder, beyond what would be incurred through normal finishing (sanding, priming, and/or painting.)
  2. The model's airframe may be of any suitable material i.e., paper, plastic, vellum, fiberglass.
  3. Fin material and fin shape is of the competitor's choice.
  4. There are no restrictions on internal modifications to the model.
  5. Recovery system shall be at least one parachute of a size and material of the competitor's choice.
  6. Propulsion shall be any certified motor or cluster of motors.  Combined total impulse of all motors not to exceed 80 Newton-seconds.
  7. Models may not be multi-stage.  All motors must be ignited on the launch pad.
  8. Models may be launched from a launch rod, rail or tower. Use of pistons is permitted.