SPORT WARBIRD RACE APRIL 14TH @ FRESNO, CALIFORNIA
04-06-2007, 05:25 PM
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SPORT WARBIRD RACE APRIL 14TH @ FRESNO, CALIFORNIA
Hi Guys,
For those that are interested in participating or watching, Fresno Radio Control Modelers will be hosting the 1st race of the Sport Warbird Series on April 14th. If you are interested in participating, there are three classes available:
.46 Modified Warbird
World Models Stock Warbird
Unlimited Warbird
A brief description of each is as follows. These are just brief descriptions. Please obtain a full set of rules if intersted as the rules will have more details.
We wil have a public raffle also which will have some great prizes such as a World Models T-34 kit.
.46 Modified Warbird
Any scale replica of a piston engine, man carrying, propeller driven aircraft that served in WWII, the Korean conflict, Vietnam or any Reno Racer that raced in an official Unlimited race heat at Reno with a minimum of 475 sq in. and a minimum of 50 inch wingspan are legal. Fuselage must have a minimum length of 40 inches from the tip of spinner to the back of the rudder. AT-6 Texans, Pt-26 Fairchild’s, T-34 Mentors (World Models T-34 legal) and Military Trainers are legal. Aircraft must weigh a minimum of 5.0-lbs. dry weight and no more than 8lbs. Plans or outlines with dimensions of the wing is required as proof of square inches. Wing and fuselage must be proportional in size. Airfoil thickness shall be no less than 10% from the root and tip cords. Wing must have constant taper. (See formula below). If you have a kit that isn’t stock, proof of these dimensions is required. Elliptical wings will be measured four inches from the outer most tip of the wing for the tip chord thickness. No twin-engine aircraft, Biplane or Formula I aircraft are allowed. No homebuilt type airplanes such as Lancair or Glassair. All landing gear must remain down in the fixed position during the races. If you have retracts, they cannot be retracted at anytime during the race. This allows aircraft with fixed gear equal.
Any size engine up to a maximum displacement of .46 c.i is legal. Carburetors are required and must allow motor to idle with ease. Engines must idle a maximum of 4000 RPM for a 10 second period. Aircraft not meeting this will not be allowed to race. You may use any exhaust system of your choice be a special muffler or tuned pipe. Exhaust must be a minimum of 2 inches to be legal. Front intake, side exhaust engines only. You cannot use a Nelson, Flora or Jett engine. You may use the performance pipes supplied by Nelson, Jett, Flora or any other performance-enhancing supplier.
World Models Stock Warbird
World Models Mfg. P-51 Mustangs 57”, P-51 Dago Red, P-51 Miss America, F4U Corsair, P-39 Aircobra, P-40 Warhawk, Spitfire and Zero are the only aircraft legal for the Stock Warbird Class. Some aircraft may have an advantage in speed due to increased wing area. (The P-40, Zero , Spitfire, and P-39 have disadvantages due to their size and weight) Almost Ready to Cover (ARC) models are available and are legal as long as the kit isn’t modified. (CONTEST DIRECTOR MAY ADD ANY NEW WARBIRDS TO LIST AS THEY ARE INTRODUCED TO THE RETAIL MARKET)
No kit modifications will be allowed to the structure of the aircraft such as but not limited to the use of foam wings, clipped wings, airfoil modifications, wing fairings, tail fairings, and incidence modifications to the wing or tail. Changing engine incidence is acceptable by shimming the motor mount to take out thrust if needed. Lightning holes along fuselage side or any other structure of the aircraft not allowed. Hidden Battery switch hatches are ok. Sheeting tail with plywood or balsa wood to strengthen tail is recommended. Center sections of the wing may be fiber-glassed to add structural strength. The aircraft must be assembled per instructional booklet supplied with kit. Aircraft may be re-covered in a different color scheme. Cowls may not be altered in outline but air ducts may be sealed. Dihedral of the wing must measure ¾” minimum. (Dihedral is to be measured by setting one half of the wing on a flat surface and measuring the other wing panel at the lowest part of the outside wing-tip rib. Variances are up to Contest Director to allow legalization. Cockpit detail or pilots not required. Canopies may be tinted, clear or opaque. Aircraft tape or sealant foam may be used in wing saddle and must have a constant thickness from leading edge of wing to trailing edge of wing without modifying incidence. All items such as cowl and canopy must be installed per kit locations. Mounting methods such as tape or screws is optional. Kit hardware such as linkages, pushrods or screws may be substituted. Landing gear in kit must remain similar to that of the stock kit. Air retracts may be substituted in lieu of mechanical gear. Tail wheel may be relocated to scale location on fuselage. Pilots have the option to convert to fixed wire landing gear and cover the holes in the wing where the gear is retracted.
The only engine for the Stock Warbird Class is the O.S. .61 FX engine. No other engine manufacturer or late model O.S. engine will be allowed. A STOCK O.S. muffler supplied with the engine is the only muffler legal. You may not remove or add any material to the engine or muffler other than head and sleeve shims. Engine must remain stock with no modifications except those listed within the rules. Pilots may change or remove head/sleeve shims.
Motors are randomly checked by Contest Director or appointed individuals. Engine checks are random and may or may not be observed at each and every race. The Contest Director has the option to pull any plane from the race at the end of the day and have them inspected regardless of position /placing at the event.
Mufflers may be modified only by removing the baffle or drilling the exhaust exit (muffler exhaust extension must remain in contact or disqualification will occur). You cannot drill the baffle and leave installed in muffler. Mufflers may be wire mounted to engine to eliminate loss of mufflers. Tie Straps securing the back half of the muffler also allowed. No muffler deflectors or extensions allowed. Mufflers may be welded to eliminate separation of halves.
Front and Rear bearings may be replaced when original bearings are no longer acceptable in quality or performance. Any aftermarket bearing that is non-ceramic will be allowed. You can use sealed or non-sealed bearings.
Engines may be mounted upright , sideways or inverted. No servo operated or electronic fuel mixtures allowed. No check valves allowed. No crankcase or other pressure other than the standard tank pressure permitted.
Unlimited Warbird
Any scale replica of a piston engine, man carrying, propeller driven aircraft that served in WWII, the Korean conflict, Vietnam or any Reno Racer that raced in an official Unlimited race heat at Reno over 520 sq.in. is legal. AT-6 Texans, PT-26 Fairchild’s, T-34 Mentors and Military Trainers are legal. Experimental Warbirds in the 1941-1948 eras are legal. Documentation is required for experimental Warbird aircraft. Please submit to Series Coordinator for approval. World Models T-34’s legal. No twin-engine aircraft. No Biplane or Formula I racing aircraft. No homebuilt type airplanes such as Lancair or Glassair.
Single engine aircraft must weigh a minimum of 6.5-lbs. dry weight and no more than 15lbs. Plans or outlines with dimensions of the wing is required as proof of square inches. Wing and fuselage must be proportional in size. Airfoil thickness shall be no less than 11% from the root and tip cords. (See formula below). If you have a kit that isn’t stock, proof of these dimensions is required. Elliptical wings will be measured four inches from the outer most tip of the wing for the tip chord thickness.
Any size engine up to a maximum displacement of 1.6 C.I. for single engine aircraft. Carburetors are required and must allow motor to idle with ease. Engines must idle a maximum of 4000 RPM for a 10 second period. Aircraft not meeting this will not be allowed to race. You may use any exhaust system of your choice be a special muffler or tuned pipe. Exhaust must be a minimum of 2 inches to be legal. 4-strokes may use supplied headers. Side Exhaust, Rear Exhaust, Ducted Fans, and Four-strokes may be used.
If interested, drop me a phone call at (408) 482-5437 or email me at [email protected].
For those that are interested in participating or watching, Fresno Radio Control Modelers will be hosting the 1st race of the Sport Warbird Series on April 14th. If you are interested in participating, there are three classes available:
.46 Modified Warbird
World Models Stock Warbird
Unlimited Warbird
A brief description of each is as follows. These are just brief descriptions. Please obtain a full set of rules if intersted as the rules will have more details.
We wil have a public raffle also which will have some great prizes such as a World Models T-34 kit.
.46 Modified Warbird
Any scale replica of a piston engine, man carrying, propeller driven aircraft that served in WWII, the Korean conflict, Vietnam or any Reno Racer that raced in an official Unlimited race heat at Reno with a minimum of 475 sq in. and a minimum of 50 inch wingspan are legal. Fuselage must have a minimum length of 40 inches from the tip of spinner to the back of the rudder. AT-6 Texans, Pt-26 Fairchild’s, T-34 Mentors (World Models T-34 legal) and Military Trainers are legal. Aircraft must weigh a minimum of 5.0-lbs. dry weight and no more than 8lbs. Plans or outlines with dimensions of the wing is required as proof of square inches. Wing and fuselage must be proportional in size. Airfoil thickness shall be no less than 10% from the root and tip cords. Wing must have constant taper. (See formula below). If you have a kit that isn’t stock, proof of these dimensions is required. Elliptical wings will be measured four inches from the outer most tip of the wing for the tip chord thickness. No twin-engine aircraft, Biplane or Formula I aircraft are allowed. No homebuilt type airplanes such as Lancair or Glassair. All landing gear must remain down in the fixed position during the races. If you have retracts, they cannot be retracted at anytime during the race. This allows aircraft with fixed gear equal.
Any size engine up to a maximum displacement of .46 c.i is legal. Carburetors are required and must allow motor to idle with ease. Engines must idle a maximum of 4000 RPM for a 10 second period. Aircraft not meeting this will not be allowed to race. You may use any exhaust system of your choice be a special muffler or tuned pipe. Exhaust must be a minimum of 2 inches to be legal. Front intake, side exhaust engines only. You cannot use a Nelson, Flora or Jett engine. You may use the performance pipes supplied by Nelson, Jett, Flora or any other performance-enhancing supplier.
World Models Stock Warbird
World Models Mfg. P-51 Mustangs 57”, P-51 Dago Red, P-51 Miss America, F4U Corsair, P-39 Aircobra, P-40 Warhawk, Spitfire and Zero are the only aircraft legal for the Stock Warbird Class. Some aircraft may have an advantage in speed due to increased wing area. (The P-40, Zero , Spitfire, and P-39 have disadvantages due to their size and weight) Almost Ready to Cover (ARC) models are available and are legal as long as the kit isn’t modified. (CONTEST DIRECTOR MAY ADD ANY NEW WARBIRDS TO LIST AS THEY ARE INTRODUCED TO THE RETAIL MARKET)
No kit modifications will be allowed to the structure of the aircraft such as but not limited to the use of foam wings, clipped wings, airfoil modifications, wing fairings, tail fairings, and incidence modifications to the wing or tail. Changing engine incidence is acceptable by shimming the motor mount to take out thrust if needed. Lightning holes along fuselage side or any other structure of the aircraft not allowed. Hidden Battery switch hatches are ok. Sheeting tail with plywood or balsa wood to strengthen tail is recommended. Center sections of the wing may be fiber-glassed to add structural strength. The aircraft must be assembled per instructional booklet supplied with kit. Aircraft may be re-covered in a different color scheme. Cowls may not be altered in outline but air ducts may be sealed. Dihedral of the wing must measure ¾” minimum. (Dihedral is to be measured by setting one half of the wing on a flat surface and measuring the other wing panel at the lowest part of the outside wing-tip rib. Variances are up to Contest Director to allow legalization. Cockpit detail or pilots not required. Canopies may be tinted, clear or opaque. Aircraft tape or sealant foam may be used in wing saddle and must have a constant thickness from leading edge of wing to trailing edge of wing without modifying incidence. All items such as cowl and canopy must be installed per kit locations. Mounting methods such as tape or screws is optional. Kit hardware such as linkages, pushrods or screws may be substituted. Landing gear in kit must remain similar to that of the stock kit. Air retracts may be substituted in lieu of mechanical gear. Tail wheel may be relocated to scale location on fuselage. Pilots have the option to convert to fixed wire landing gear and cover the holes in the wing where the gear is retracted.
The only engine for the Stock Warbird Class is the O.S. .61 FX engine. No other engine manufacturer or late model O.S. engine will be allowed. A STOCK O.S. muffler supplied with the engine is the only muffler legal. You may not remove or add any material to the engine or muffler other than head and sleeve shims. Engine must remain stock with no modifications except those listed within the rules. Pilots may change or remove head/sleeve shims.
Motors are randomly checked by Contest Director or appointed individuals. Engine checks are random and may or may not be observed at each and every race. The Contest Director has the option to pull any plane from the race at the end of the day and have them inspected regardless of position /placing at the event.
Mufflers may be modified only by removing the baffle or drilling the exhaust exit (muffler exhaust extension must remain in contact or disqualification will occur). You cannot drill the baffle and leave installed in muffler. Mufflers may be wire mounted to engine to eliminate loss of mufflers. Tie Straps securing the back half of the muffler also allowed. No muffler deflectors or extensions allowed. Mufflers may be welded to eliminate separation of halves.
Front and Rear bearings may be replaced when original bearings are no longer acceptable in quality or performance. Any aftermarket bearing that is non-ceramic will be allowed. You can use sealed or non-sealed bearings.
Engines may be mounted upright , sideways or inverted. No servo operated or electronic fuel mixtures allowed. No check valves allowed. No crankcase or other pressure other than the standard tank pressure permitted.
Unlimited Warbird
Any scale replica of a piston engine, man carrying, propeller driven aircraft that served in WWII, the Korean conflict, Vietnam or any Reno Racer that raced in an official Unlimited race heat at Reno over 520 sq.in. is legal. AT-6 Texans, PT-26 Fairchild’s, T-34 Mentors and Military Trainers are legal. Experimental Warbirds in the 1941-1948 eras are legal. Documentation is required for experimental Warbird aircraft. Please submit to Series Coordinator for approval. World Models T-34’s legal. No twin-engine aircraft. No Biplane or Formula I racing aircraft. No homebuilt type airplanes such as Lancair or Glassair.
Single engine aircraft must weigh a minimum of 6.5-lbs. dry weight and no more than 15lbs. Plans or outlines with dimensions of the wing is required as proof of square inches. Wing and fuselage must be proportional in size. Airfoil thickness shall be no less than 11% from the root and tip cords. (See formula below). If you have a kit that isn’t stock, proof of these dimensions is required. Elliptical wings will be measured four inches from the outer most tip of the wing for the tip chord thickness.
Any size engine up to a maximum displacement of 1.6 C.I. for single engine aircraft. Carburetors are required and must allow motor to idle with ease. Engines must idle a maximum of 4000 RPM for a 10 second period. Aircraft not meeting this will not be allowed to race. You may use any exhaust system of your choice be a special muffler or tuned pipe. Exhaust must be a minimum of 2 inches to be legal. 4-strokes may use supplied headers. Side Exhaust, Rear Exhaust, Ducted Fans, and Four-strokes may be used.
If interested, drop me a phone call at (408) 482-5437 or email me at [email protected].
