Hobbies And Interests
Motor Problems
The original model Radian sailplane featured a motor that had an output capable of 19 watts. Newer models were reported to be under performing and testing revealed that the motors on these models had a maximum output of 12 to 13 watts. Further testing revealed that the motor itself was not defective but that some props had a manufacturing defect that reduced power. Radian sailplane owners had to install replacement props to correct the defect.
Foam Body
The foam body of Radian sailplanes is what helps keep them light enough to fly. The reduced weight comes at a price: durability. It is common for the nose and body of Radian sailplanes to crack on impact if the plane crashes. Foam wings are also much weaker than wood or fiber glass and are more susceptible to snapping. The wings in a Radian sailplane install easily but are unstable and have been known to shift position during flight.
No Ailerons
Ailerons are small panels on the wings of an RC plane that allow it to dip and roll during flight. Radian sailplanes do not use ailerons. As a result they suffer from a lack of maneuverability in making turns and are incapable of doing tricks such as the barrel roll. Radian sailplanes rely on a rudder instead, which affords the user just enough control to change the plane's elevation. They are able to perform loops in the air but with an increased risk of a damaging crash.
Thermal Lift
Because they have relatively weak motors, Radian sailplanes require the uplift of thermal drafts to keep them aloft for extended periods of time. This is a significant drawback for owners who live in urban environments or have access to limited amounts of space. In fact, it is recommended that new user of Radian sailplanes bring someone to act as a spotter because the plane can travel large distances in search of thermal vents and is easily lost.