Hello Mark
"1) What engines are currently ran in the Sport Goodyear class as raced by Texas, Kansas, and SCAR? Nelson, Rossi, and ?
2) So far in the rules as I read them there is no reference to the building material of the plane. This means to me that should I want to build an all Carbon Fiber plane it would be legal. Is this true? If this is the case then I am sure someone is doing this already?? Of course in a limited class this would not be acceptable due to the material cost."
I have an airplane set up for the SCAR Goodyear rules. It uses an Moki .15 ABC sport combat engine. Others I have seen competing in this class have used: O.S. .15CV, Fox .15 BB, Moki .15 Sport, O.S. .15FP. Other suitable engines for this class are: Super Tigre G-15's and X-15's, K&B series 73 .15's, O.S. .15LA's, Norvell Big Mig and AME .15's, and Tower Hobbies .15 to name a few.
If starting your own Sport Goodyear event, the first place to start is to determine the airspeed for the event. If most everyone in your area is primarily a Stunt flyer used to 5 second laps, then even an 80-85 mph Goodyear will seem fast. However, 80-85 mph is actually a fairly comfortable speed to race at with a little practice, so you might want to consider that as a nominal speed to shoot for. An O.S. .15LA should put you comfortably within that speed range.
I have copied the Scar Goodyear rules, and posted them below. You will find that your second question is answered within these rules.
SCAR SPORT GOODYEAR RULES - 2002
OBJECTIVE:
The objective of this event is to provide a forum for team racing competition that allows for
racing with relatively simple and inexpensive, yet realistic appearing, profile models of actual
[racing] aircraft. The Supplemental provision for "ALL SCALE AIRCRAFT" is included for fun
and not intended to give a "RACERS ADVANTAGE". Please participate within the basic intent
of the rules.
Revised supplemental rules for 2002, item #2. Basic Model Rules
1. Basic model rules governing 'profile', landing gear, scale and accuracy and cheek
cowls as per the AMA Scale Race class. This includes painted canopies, race numbers and
AMA numbers.
2. Supplemental rules t2002]. Any scale aircraft may be entered in this event as long as the
following criteria is met. This allows for "Warbirds", Racing Biplanes, Civilian Airplanes, Crop
Dusters or any other "Strange Aircraft" that you may wish to build.
A. All divisions of rule #1 apply to all models, except for (1/8 scale'
B. Minimum wing area must be 150 Square inches. Bi-plane wing(s) area total is min. 150
sq. in.
C. 3-view drawings may be requested by the Event Director. Burden of proof is on
competitor.
D. Stabilizer/Elevator may be increased to +25% of wing area.
E. Scale landing gear per the AMA rules definition will be enforced.
3. 1 ounce maximum size fuel tank.
4. Fuel shutoffs allowed.
5. No pressure refueling systems or MFV's. All refueling to be performed through a
maximum 1/8 inch I.D. tube.
6. Fuel tanks cannot be recessed into the model.
7. All controls (bellcrank, leadouts, pushrod, control horn) must be externally mounted,
although mounting of bellcranks through the fuselage is permitted.
8. Models must be constructed of wood. The use of carbon fiber, glass fiber, Kevlar and
the like shall be limited to reinforcement and/or finishing of the model only.
9. Lines shall be 52'-6" +/- 6" from center of handle to the center of the model. Minimum
line diameter shall be 0.012 for solid, 0.015 for stranded.
10. Models and lines shall be pull tested to a loading of 25 pounds prior to competing in an
event.
11. Any engine may be used that did not have a listed retail price exceeding $150 U.S. as
of January 31, 2000. Proof of retail pricing lies with the competitor desiring to use a specific
engine by presenting evidence showing:
(a) General availability (published advertisements, etc.) at or below the stated limit.
Or
(b) In the case of an older engine, a dated advertisement at or below the stated limit.
12. Organizing clubs may opt to limit an event to diesel or glow engines only. It is
preferred, however, that events held as part of a
sanctioned competition, or, events that are open to non-club members, shall allow both
diesel and glow engines to compete.
13. Glow engines shall be restricted to a maximum of 10% nitromethane in their fuel.
Organizing clubs may opt to provide standard glow and diesel fuel at a race.
14. The organizing club may use either of the following race formats: [set time or set # of
laps]
A. All races to be 15 minute moto's. No final round, with the team recording the greatest
number of laps being declared the winner of the event.
B. Heats of 7.5 minutes shall be used, with the 3 teams recording the greatest number of
laps in the heat races racing in a 15 minute final. The team recording the greatest number of
laps in the final shall be declared the winner of the event. OR
A. 100 Lap preliminary heat (1 heat only) No mandatory pit stops required. Top three heat
times proceed to final.
B. 200 Lap final. No mandatory pit stops required. Fastest time wins.
Cheers, Les Akre