DALLAS MODEL AIRCRAFT ASSOCIATION

GOLDBERG RACING RULES

Revised 1997

THE OBJECTIVE OF THIS EVENT IS TO PROVIDE A MEANS FOR

ALL FLYERS TO COMPETE EQUALLY. THIS IS ACHIEVED BY STRICT

LIMITATIONS ON AIRFRAMES AND ENGINES. THE PURPOSE OF THIS

EVENT WILL ALWAYS BE TO HAVE A RACING EVENT THAT IS CLOSELY

MATCHED AND IS EXCITING FOR PARTICIPANTS AND SPECTATORS.

ALL AMA UNIFIED CONTROL LINE RACING RULES APPLY EXCEPT AS

MODIFIED OR AMENDED BELOW.

1) AIRFRAME

A. THE MODEL SHALL BE A CARL GOLDBERG SHOESTRING, COSMIC

WIND OR BUSTER OR BRODAK BUSTER. DIRECT COPIES OF KITS

ARE ELIGIBLE AS WELL. WOOD SUBSTITUTION IS ALLOWED

SO LONG AS IT CONFORMS TO THE ORIGINAL KIT.

B. THE ENGINE MOUNTS AND PLYWOOD DOUBLERS MAY BE LENGTHENED

REARWARD FOR MORE STRENGTH, BUT MAY NOT BE THICKER OR

THINNER THAN THE ORIGINALS.

C. PLYWOOD DOUBLERS ON THE ELEVATOR MAY BE ENLARGED AND

PLACED ON BOTH THE UPPER AND LOWER SURFACES FOR STRENGTH.

D. NO RIESTRICTIONS FOR RUDDER OFFSET, ENGINE OFFSET OR LINE

ANGLE.

E. NO ADDITIONAL WING SHEETING IS PERMITTED NOR WILL ANY

WING THINNING BE ALLOWED.

F. ANY TYPE METAL GEAR MAY BE UTILIZED. THE MAIN WHEELS WILL

BE AT LEAST 2 INCHES IN DIAMETER AND SEPARATED BY AT LEAST

5 INCHES WHEN VIEWED FROM THE FRONT OF THE MODEL. TAILWHEELS

ARE PERMITTED.

G. IT IS SUGGESTED THE FINISH BE COLORFUL AND REPRESENTATIVE

OF A REAL RACING AIRCRAFT. THE CANOPY WILL BE PAINTED A

CONTRASTING COLOR OR OUTLINED TO BE READILY APPARENT.

RACE NUMBERS WILL BE PLACED ON BOTH SIDES OF THE FUSELAGE

AS WELL AS THE UPPER PORTION OF THE INBOARD WING.

(ALTERNATE COLORFUL SCHEMES ACCEPTABLE)

H. ALL REMAINING ITEMS MUST BE AS PER THE KIT!

2) ENGINE

THE ENGINE MUST BE A STOCK FOX 35 (PART NUMBER 13500)

WITH NO MODIFICATIONS. THE PISTON AND LINER MAY BE DEBURRED

TO PREVENT WEAR. THE NEEDLE VALVE ASSEMBLY WILL BE STOCK,

HOWEVER THE NEEDLE STEM MAY BE SHORTENED TO PREVENT DAMAGE.

THE NEW Fox NEEDLE VALVE THAT IS CURRENTLY PROVIDED WITH THE

ENGINE MAY BE SUBSTITUTED IN OLDER ENGINES. SKIDS TO

PROTECT THE NEEDLE ARE PERMITTED. ENGINES MAY BE SUBJECT TO

TEAR DOWN TO VERIFY THEIR LEGALITY. GASKET SETS WILL NOT BE

PROVIDED BY THE MOST CLUB. SCREWS MAY BE SUBSTITUTED.

3) FUEL SYSTEM

ANY SIZE FUEL TANK IS PERMITTED. TANKS MAY BE OF ANY

CONSTRUCTION AND MAY BE BOUGHT OR CUSTOM MADE. FUEL DRAW

WILL BE SUCTION ONLY, NO PRESSURE SYSTEMS ALLOWED. TANK

MUST BE FILLED THROUGH A 1/8 INCH TUBE, NO FAST OR QUICK

FILLS ARE ALLOWED. VENTS MAY BE DIRECTED INTO THE ONCOMING

AIRSTREAM, HOWEVER NO PRIMER SYSTEMS OR SHUT OFFS WILL BE

ALLOWED. ENTIRE FUEL SYSTEM MUST BE LOCATED OUTBOARD OF THE

AIRFRAME CENTERLINE. FUEL WILL BE SUPPLIED BY THE CONTEST

MANAGEMENT AND WILL CONSIST OF NOT MORE THAN 10% NITRO NOR

LESS THAN 20% OIL.

4) PROPELLER

ANY COMMERCIALLY AVAILABLE PROP MAY BE USED. No

MODIFICATIONS WILL BE ALLOWED EXCEPT FOR LIGHT SANDING TO

BALANCE AND REMOVE BURRS AND SHARP EDGES.

5) STARTING

ENGINE MUST BE STARTED BY FLICKING THE PROP BY HAND.

GLOVES ARE PERMITTED TO PREVENT CUTS, YOU MAY ALSO USE A

"CHICKEN STICK." NO ELECTRIC STARTERS OR ANY MECHANICAL

DEVICE WILL BEPERMITTED. "HOT'GLOVES" OR "HOT THUMBS" ARE

PROHIBITED.

6) CREW MEMBERS

EACH CREW SHALL HAVE A MAXIMUM OF THREE MEMBERS. THESE

SHALL INCLUDE THE PILOT AND TWO MEMBERS IN THE PITS. A PIT

MEMBER MAY BE REPLACED DURING THE RACE PROVIDED THAT THE

PERSON REPLACED LEAVES THE IMMEDIATE PITTING AREA.

7) CIRCLE LAYOUT

THE LAYOUT WILL CONSIST OF TWO CIRCLES. THE INNER

CIRCLE SHALL HAVE A RADIUS OF 68 FEET AND THE OUTER CIRCLE

76 FEET. PITTING MUST BE DONE OUTSIDE THE OUTER CIRCLE.

PITTING INSIDE THIS CIRCLE SHALL BE CAUSE FOR IMMEDIATE

DISQUALIFICATION FROM THE RACE.

8) CONTROL LINES

FLYING LINES WILL MEASURE 60 FEET (6 INCHES). THEY

SHALL BE OF THE MULTISTRAND STEEL TYPE WITH A DIAMETER NOT

LESS THAN .018 INCHES. LENGTH WILL BE MEASURED FROM THE CENTER

OF THE GRIP HANDLE TO THE CENTERLINE OF THE AIRFRAME. THE

MODEL CONTROL SYSTEM WILL BE SUBJECT TO A 25 POUND PULL TEST.

9) RACE FORMAT

EACH ENTRANT WILL HAVE TWO 70 LAP HEATS. HEATS WILL BE

FLOWN BACK TO BACK WITHTWO MINUTES BETWEEN HEATS. THERE

WILL BE TWO MANDATORY PIT STOPS PER HEAT. AN ENTRANT WHO

COMPLETES THE 70 LAPS WITHOUT THE REQUIRED PIT STOPS WILL

FLY UNTIL THE STOPS ARE MADE PLUS ONE ADDITIONAL LAP BEFORE

TIME IS STOPPED. THE FINALS WILL BE l40 LAPS WITH 4 PIT

STOPS MINIMUM. ALL RACES WILL BE DONE WITH NO LESS THAN 2 OR

NO MORE THAN 4 ENTRANTS.