Make your own free website on
Back To Rules and Commentaries Index



International Scale Race

    • 1/8 scale +/- 5% Goodyear or Thompson Trophy Racer.
    • Profile fuselage, cheek cowl if on prototype.
    • Single or dual wheeled Landing gear, fuselage or wing mounted as on prototype, 25mm (1 inch) min. wheel diameter
    • Exposed leadouts (if used), bellcrank, and pushrod.
    • Fuel tank capacity = 30cc. (1 oz. ) maximum. Pressure filling and shutoffs optional, Multi-Function Valves not allowed.
    • Max. engine size = 2.5cc. (.15 c.i.) displacement.

Open Profile

    • Any profile model.
    • Unrestricted fuel tank capacity, and fueling system.
    • Max. engine size = 3.1cc (.19 c.i.) displacement.
    • Max. model weight = 900 grams (32 oz.) with full tank.

General Rules

  1. Line length, per F2C (52.5 ft. min.)
  2. Diameter: .35mm Solid Wire (.014 in.).38mm Stranded (.015 in.), (20G) Min. Pull Test.
  3. Maximum 10% nitro fuel for glow engines.
  4. No minimum number of Pit Stops.
  5. No maximum number of attempts within the date limitations (See item XII below.)
  6. When the slowest aircraft in a given heat has completed a block of 1000 laps, a safety recess signal will be sounded to alert all pilots of a five, (5) minute recess. Timing and lap counting for each entrant will stop as soon as that entrant safely lands. During this period, each aircraft will be subject to a pull test, and visual safety check. Upon completion of the safety check of all entrants, the race will be re-started. The safety recess will be repeated at each completed block of 1000 laps. Pilots can be relieved or rotated during the recess, or whenever all entrants in a heat are down for refueling. No pilot changes can be made whenever any aircraft is airborne.
  7. All heats must start with at least two, and no more than three teams. Any number of surviving teams may finish the race for official scoring.
  8. Each Performance affidavit must be signed and dated by at least two witnesses. (Witnesses can be competing team members.)
  9. Performance affidavits must include (as a minimum) photograph(s) of aircraft, and equipment, accompanied by a written report sufficient to establish compliance to these rules.
  10. All races to be conducted between May 1, 2000 and Midnight local time May 31, 2000.
  11. Scores will be based the fastest time for entries completing the entire 5000 laps. Every Team that completes the entire 5000 laps will be recognized with a suitable Certificate as a "2K Race Survivor". The fastest overall time in each class to be recognized with a similar Certificate as "World’s Fastest 2K Survivor."
  12. In the event that no entry completes the entire 5000 lap course in a given class, non-completion points can be calculated using the formula:

    10 X (kilometers squared, divided by seconds) OR: 10*((D^2)/T) in spreadsheet-ese.

    Where: distance, D, is in kilometers, and time, T, is in seconds.

    NOTE: As an example: An entry that averages 126 k.p.h. for 450 kilometers will receive 157 points, while an entry that averages 150 k.p.h. will need to complete more than 350 kilometers for the same score. Obviously, the team averaging a faster speed will receive more points for equal distances.