Four Pi is a brand of balsa constructed kits and ARF kits that are designed and manufactured by Four Pi, Inc of Norridge, Illinois, USA.
The brand is made up of a small collection of airplane kits, all of which are built-up balsa construction.
The bulk of the flyers fall into the flatout or profile category. These balsa profile RC airplane kits include the P-40 Warhawk, the P-51 Mustang, and the P-47 Thunderbolt. These classic warbird profile kits are made up of a thin profile fuselage and a wide-area wing for full 3D flight.
Also part of the brand is a flying wing called the "Skyfire". The airplane is glow-powered and spans 36 inches. It is 27 inches long and weighs in at 48-64 oz.
Rounding out the brands offering is the lone ARF model, the OT-40. Being an ARF, the model comes with most components already constructed and requires only final assembly. The kit spans 54 inches and weighs in at 3-5 pounds. It requires the purchase of a 4-channel radio, the servos, and 2 or 4-stroke engine.
Four Pi branded kits are available on the Four Pi, Inc company website (www.fourpi.com).