A P-30 class plane is a beginner plane limited to 30 inches in length and span. It must weigh at least 50 grams, with a maximum of 10 grams rubber installed. The propeller is a 9.5 inch diameter commercial one made of plastic, by AMA rule. The wing span of the Peck “One Night 28” shown was increased from 28 inches to nearly 30 inches, and the tail was modified to pop up at a time determined by a fuse. The rubber motor is made up of 6 strands (3 loops) of 1/8 inch wide rubber 20 inches long, to meet the 10 gram rule.
Small Old Time Cabin
Small Old Time or Nostalgia Cabin planes are a staple of the Old Timer contests at Bong. The rules for these contests written by NFFS or FAC specify a cutoff year and allowable features like free wheeling propellers common to the old designs. The Flying Aces Moth with its 24 inch wing span falls into this category. The prop on the Moth in the picture was shaped from a balsa blank provided by Superior Props, a Volare Product. The Flying Aces Moth is so-called because its plans were first published in Flying Aces Magazine over 80 years ago, and is still a popular design. YouTube videos can be found like ” Flying Aces Moth – Stronger Motor ” by sandfac showing a good 1 minute flight (818 views · 4/25/2017). The Peck kit this is built from is still available ( https://www.wind-it-up.com/products/flying-aces-moth ) and Kits may be had at other places. Flying weight was 50 grams. With a wing area of 77 sq inches, wing loading is 3.3 ounces / sq ft and cube loading is 4.5 oz/ cu ft.
Catapult gliders may be flown indoors or out, with planes built according to Nostalgia designs or modern ones incorporating carbon fiber reinforced tubes and strips in their design. The length and width of the rubber launching strip is specified by the rules for each class.
The Mulvihill Trophy is perpetual and was endowed in 1923, making it the oldest U.S. Model Airplane Trophy. A rubber powered model eligible for the Mulvihill has no design restrictions except that the projected area of the wing shall not exceed 300 square inches. It has been a popular competition for Bong Eagles Fliers at the AMA Nats. In 2009 5 Eagles competed. Chuck M. of the Eagles won the Trophy in 2018. He took 2d place in 2019 and Jim F. also flew both years
The Wakefield Cup is the trophy for an international competition with rules set by the FAI, The plane in the picture was built to the design of the winner of the competition in 1939. Best flight that day lasted 43 minutes.
Old Time Stick – Large
Like Small Old Time Cabin, this is a Nostalgia Class, for designs of an earlier era. The plane shown climbing is an “Ed Lamb’s Climber”, a 1941 design with a 45 inch wing span, which packs nearly as much rubber as the airframe weighs.
Nitro fueled (Methanol + oil + nitromethane) planes in the 1/2 A class with I/C engines displacing about 0.05 cubic inches ( nearly 1 cc ) scream into the sky during the short motor run after launch. They are best viewed at the AMA National Flying Site in Muncie, IN, during the Free Flight National competition. This picture was taken during the 2018 Nationals. Some of the Bong Eagles are still flying these amazing machines.
See Indoor Planes for a description – Bong Eagles compete with Delta Darts in Mass launches outdoors at contests, whenever weather conditions permit, and sometimes when they don’t.