100 Mile LA-25 Sport Race

Event director Brad LaPointe



To race 100 miles, 1400 laps, with similar equipment that is readily available to everyone. Twenty pit stops are required.



The rules will follow those posted on the Toronto Balsa Beavers web site.


see pages 8, 9, & 10.



1. Similar to generally-accepted slow combat and sport race rules.

2. 300 square inches of wing area at least 1” thick. 24” fuselage from prop to elevator hinge.

3. The model should be painted to resemble a racer. A canopy outline is required.

4. An airframe and/or engine may be used by only one contestant.

5. The Brodak Hot Shot is a good off-the-shelf airframe for this event.



1. Fast fills are prohibited.

2. The tank must be vented to the atmosphere.

3. The tank must be mounted ahead of the wing leading edge and on the outboard side of the fuselage.

4. The tank must be filled through a 1/8 inch o.d. tube. A jet fill attachment is allowable.

5. About 2.5 ounces has proven to be a good size for this race.

6. 67 laps per tank is the bare minimum needed to complete the race without extra pit stops.



1. Must be a stock OS LA-25.

2. Bolts and the backplate may be replaced.

3. An engine disassembly and inspection may be ordered after the race by the C.D. to check for infractions of the rules.



1. Must be a stock molded plastic Master Airscrew, APC, or Tornado 8x6.

2. Balancing, drilling, and dulling edges is OK.

3. No modifying of pitch or diameter.



1. Hot gloves, hot fingers, and electrical, spring, or mechanical starters of any kind are prohibited.

2. Shut-offs are recommended

3. Lines must be .015 minimum stranded. Line length is 60' +/- 6" measured from the center of the plane to the center of the handle.

4. Pull test will be 35 pounds.

5. The race will consist of 1400 laps with twenty pit stops required.

6. If the engine fails on takeoff and at least one HALF lap is flown the restart will count as a pit stop.

7. The fuel will be Ritch’s Brew 10% nitro with 5% castor and 15% synthetic oil. Sealed gallons will be available for purchase.

8. Any one entrant may act as pilot, mechanic or assistant for no more than one entry unless there is a shortage ofcrews for the two races.

9. Due to time constraints we have time for only two 3-up races. If there are more than six perspective entries, there will be a management decision keep the event within the constraint of flying Thursday morning.

10. The race will begin with a 30-second start period to allow all engines to be started.


1. In the interest of allowing every team to complete 100 miles, the airplane, engine, crew, and all equipment may be replaced as necessary. As necessary does not mean repeated replacement as in a relay,

2. In the event of a crash or line tangle bringing down two or three models, the race will be stopped until the equipment can be made safe.

3. In the event of a one-plane incident the race continues.