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NCLRA Quickie Rat

    To provide a racing event that may easily be flown "three up" and which employs relatively inexpensive and easily constructed control line racing models. To encourage and promote the success" of the "average" control line flyer in control line racing competition.

    1. Applicability: All rules from the Unified Control Line Racing Rules apply to this event except as modified, appended or specified here.
    2. Maintenance: It is imperative that the performance level of this event be maintained such that it is always possible to safely race "three up" on stranded lines. If at any time it is felt that the event must be changed from the three up format for safety concerns or that solid lines are required, then the event rules should be immediately modified so as to reduce the aircraft performance level. It is recommended that this event be reviewed by the National Control Line Racing Association on a yearly basis. As a guideline, if nominal speeds surpass 105 MPH (17.14sec/7 laps), then the allowable venturi (part 4.7.1) should be reduced by 0.010". The sport of three up control line racing should be preserved at all costs even if individual equipment is temporarily obsolete.

    1. Models will be of profile construction only. Refer to profile definition in Control Line General section. The use of cast pan or metal engine crutch is not allowed. A mounting plate of metal or other material of no more than 1/8" thickness may be used between the lugs of the engine and the motor mounts.
    2. The control system, consisting of leadouts, bellcrank, pushrod and control horn will be totally exposed and external to normal airplane contours. The leadout wires will not be recessed into the wing, the pushrod will not be mounted inside the fuselage, nor will the bellcrank be allowed to be mounted inside the fuselage. The leadout tip guides may be inset into the wing but should not be more than 1/2 inch in length.
    3. The line connections to the model will be external to the aircraft wing tip.
    4. The fuel tank must be outboard of the face of the motor mounts where the engine is bolted, excluding any mounting plate as described in 3(a).
    5. Pressure fuel systems are not allowed, with the exception that the fuel tank vent tubes may be directed into the airstream.

    1. Maximum total displacement shall be 0.4028 cubic inches (6.6cc). Engines must be production units assembled from factory available production parts. Engines and parts must have been produced in quantities greater than 500 and all must be or have been available through normal retail outlets in the USA. Parts substitution shall be limited to catalog listed parts produced in quantities greater that 500 units for the engine being altered and available commercially to anyone from the manufacturer of the engine. Engines may only be modified by removing parts or material from parts except as noted in the following paragraphs. No material or part may be added except as noted in the following paragraphs under this section.
    2. The "engine" is defined as the complete unit, ready to run, needing only prop, fuel and starting voltage except that the glow plug, venturi and/or restrictor, spraybar and needle valve, gaskets, bolts, drive washer, front washer, prop nut, shims, piston ring(s)(if used) and ball bearings (if used) need not be considered part of the production unit. These parts are not subject to the rules regarding quantity or source. In addition, chrome plating of a production cylinder is allowed.
    3. The glow plug must have a thread dimension of 1/4-32.
    4. The engine must be of the front intake configuration. All air for the combustion process must come through the crankshaft. Altering nominal sub-port induction, timed holes in the case and sleeve or other techniques to circumvent the requirement that all air come through the specified venturi opening are not allowed.
    5. Only single by-pass port engines are allowed The engine as purchased and as used shall be of the single by-pass configuration. No schneurle or PDP porting is allowed.
    6. No ABC or AAC piston/sleeve configurations are allowed.
    7. No variable area carburetors shall be allowed. Each engine shall be equipped with a venturi and spraybar meeting the following restrictions:
      1. The venturi shall have an inside circular bore of not more than .292". The venturi will maintain this diameter for at least 0.155" at the throat of the venturi where the spraybar will be located at the midpoint of the area.
      2. The spraybar assembly will be located precisely through the centerline of the venturi bore and shall have a constant circular cross section of diameter not less than 0.153" for the portion in the throat of the venturi.
    8. No tuned pipes, mufflers or exhaust extensions are allowed.
    9. The complete engine/venturi/spraybar system shall weigh less than 10.5 ounces.

    1. The fuel for this event shall be supplied by the contest organizers and shall contain not more than 10% Nitromethane not less than 20% lubricant and the rest shall be methanol.

  6. RACES:
    1. Each contestant shall be allowed at least two qualifying heat races.
    2. Qualifying heat races shall be 70 lap races with one required pit stop. It is suggested that only the best time of the two qualifying attempts be used as the basis for advancement to the finals.
    3. Finals race shall be 140 lap races with three mandatory pit refueling stops.
    4. All races shall be run with no less two or more than three flyers, races should be flown three up.

  7. LINES:
    1. Shall be minimum of two .018 diameter multi-strand only, and length shall be 60 feet plus or minus 6" as measured from center line of handle to center line of fuselage.
    2. Pull test 35 Lbs.

    1. All flying shall be done between 6 and 20 feet altitude.

    1. Shutoffs: allowed; fuel shutoffs are recommended for safety.
    2. Hot gloves: allowed
    3. Prop: open