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4. Pilots will be allowed two practice laps of the proper speed course when attempting to qualify, following which they shall rock the aircraft's wings violently in front of the grandstand and cut off course behind the timing stand before starting their official qualifying runs. 
5. Two consecutive laps of the 15-mile course will determine official qualifying speeds for Thompson, Sohio and the Tinnerman Trophy Races. 
6. Women's Trophy Race entries and Goodyear Race entries will be required to make one official lap only of the proper speed course in order to determine their eligibility from a speed point of view. 
7. To be eligible for the Thompson Trophy Race, which is for aircraft with engines of unlimited cylinder displacement, the airplane must make an average speed of 325 miles per hour in the qualifying trials of two laps over the regulation course.
8. The ten (10) aircraft which establish the fastest qualifying speeds during the entire three days of the qualifying trials will be eligible for the Thompson Trophy Race. Starting positions for all Thompson entries will be determined from the times and days on which qualifying speeds were established, with the pole position given to the pilot who establishes the fastest speed on the OPENING day of the qualifying trials. Second and third positions, ect., will be awarded to those pilots who make the next fastest qualifying speeds on the OPENING day to qualifying, ect.
9. Two qualifying trials will be permitted an entrant if necessary but all aircraft making the minimum qualifying speed on their first attempt will not be permitted the additional trial. If during an official qualifying run, the pilot develops engine or other trouble, he should not complete the official qualifying run- following which he shall be allowed another try. More than two attempts to qualify for any race will not be permitted. 
10. A cash purse of $100.00 each will be awarded the ten entries who qualify at the greatest speeds on August 30, 1949. This does not apply to Goodyear and Women entrants.
12. All Women entries, if more than eight (8), must qualify on Wednesday, August 31, 1949 ONLY. 
[[BOLD]] D-THOMPSON TROPHY RACE ENTRIES-SPECIFIC REGULATIONS
1. Open to any CAA certificated aircraft, with any type engine or propeller. Water injection and any type fuel is permitted.
2. Major changes to aircraft and engines will not be permitted after arrival at the Cleveland Municipal Airport.  When aircraft arrive at the Cleveland Airport they will be impounded to the extent that seals may be placed on the mountings of major engine parts.  Only minor repairs will be permitted after this action and these will be allowed only after permission has been granted by the Race Technical Committee.  Aircraft must remain at the Cleveland Municipal Airport after their arrival.
3. Constant surveillance of aircraft, and the work being done thereon, will be maintained following approval of these aircraft by the Race Technical Committee.
4. Forced draft ventilation of cockpits for aircraft powered with engines mounted in the nose ahead of the pilot is required.
5. Minimum altitude during the Thompson Trophy Race is 200 feet; maximum altitude is 500 feet.
[[BOLD]] E-GOODYEAR TROPHY RACE ENTRIES-SPECIFIC REGULATIONS
1. ENGINES-Total piston displacement must not exceed 190 cubic inches.  Engine must retain an Approved Type Certificate and must not be altered structurally or otherwise except as approved by the manufacturer.  Newly A. T. C.'d engines must be in sufficient quantity production to be available to all. Such engines must be A. T. C.'d and publicly announced by the manufacturer at least six months prior to entry in a race.  Following is a list of engine alterations, not to be considered all inclusive, that would affect adversely the A. T. C. of such engines.
(a) Any change in demension from the combustion chamber head to the lower face of the cylinder hold down flange.
(b) Any alteration in height of top of of piston head over the center of the wrist pin hole.
(c) Any dimensional change in the bore or stroke.
(d) Any alteration in length of the connecting rod between the center of the wrist pin hole and the center of the crank pin hole.
(e) Any change in the dimension of the inside diameter of the carburetor venturi or of the injector throttle body.
(f) Any change in the dimension of valve lift.
(g) Any change in the weight or characteristics of valve springs.
(h) Any change of the intake ports in polishing, other than smoothing the port.  It is considered that the port is polished, but not enlarged when low spots will mottle the surface when polished.
(i) Any change in dimension across the top of the crankcase between cylinder mounting pads.
(j) Any use of the spark plug make or model not approved in the engine.
(k) Any change of the valve seat angle from 45 degrees.
(l) Any use of water injection.
(m) Any use of a pump or blower to increase carburetor inlet pressure.  It is considered that resetting of magneto time would not affect the A. T. C. a long as approved magnetos and parts are used.  It is considered the A. T. C. would not be affected if the throttle lever were moved to the opposite side of the injector unit.