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ParkZone Specifications

ParkZone is a brand of radio-controlled model airplanes that the Illinois-based company Horizon Hobby manufactures. The name ParkZone is derived from the aviation hobbyist term park flyer, which refers to a small-sized remote-controlled aircraft that can be safely flown in parks. Horizon Hobby produces several ParkZone models, which can belong to the traditional Park Flyers series or to the Ultra Micro series. Popular examples of each include the Park Flyer P-47D Thunderbolt BNF and the Ultra Micro T-28 Trojan BNF.

Wingspan
- Wingspan is the measure of the linear distance between a plane's two wingtips. Planes with greater wingspans tend to offer better performance, as they are able to push against larger amounts of air. The ParkZone Park Flyer P-47D Thunderbolt BNF has a wingspan of 42.2 inches or 1,070 mm, while the ParkZone Ultra Micro T-28 Trojan BNF has a wingspan of 16.5 inch or 419.1 mm.
Overall length
- In addition to having greater wingspans than Ultra Micro planes, Park Flyer ParkZone planes have longer overall lengths. The Park Flyer P-47D Thunderbolt BNF, for example, is 36.9 inches or 940 mm long, while the Ultra Micro T-28 Trojan BNF is just 13.6 inches or 346.1 mm long.
Center of gravity
- The center of gravity of a plane refers to the point at which it concentrates most of its mass. While the P-47D Thunderbolt BNF has a center of gravity that is 2.4 inches or 60 mm back from the leading edge of its wing's root --- where the wing meets the body of the plane --- the T-28 Trojan BNF has a center of gravity that is 1.3 inches or 32 mm back from the leading edge of its wing's root.
Prop S=size
- Due to their larger sizes, Park Flyer ParkZone planes require larger propellers than Ultra Micro planes. The P-47D Thunderbolt BNF has a propeller that is 9.5 inches by 7.5 inches or 241.3 mm by 190.5 mm, which means the propeller has a diameter of 9.5 inches and a pitch of 7.5 inches. Pitch refers to the distance a single propeller blade moves forward in one revolution. The T-28 Trojan BNF has a propeller that measures 5.1 inches by 2.8 inches or 130 mm by 70 mm.
Retracts
- ParkZone planes with retracts are able to pull their landing gear into their bodies after take-off and then re-extend the landing gear again for landing. While the Park Flyer P-47D Thunderbolt BNF has retracts, the Ultra Micro T-28 Trojan BNF does not.
Flaps
- Flaps refer to the adjustable panels on the trailing edges of aircraft, which allow for greater control over lift and drag. While the wings of the P-47D Thunderbolt BNF have flaps, the wings of the T-28 Trojan BNF do not.
Flying weight
- With its retracts and flaps attached, the P-47D Thunderbolt BNF weighs 42.5 oz. or 1,200 grams. Without the retracts and flaps, the plane weights 40 oz. or 1130 grams. The T-28 Trojan BNF weighs just 1.34 oz. or 38 grams.

Aviation