The worst ARF I have ever owned is the Kavan/SIG Bloody Mary electric park flyer. The Bloody Mary lists for $120 and is extremely well made. However, the plane is heavy and can barely move with the stock power system, much less get off the ground! The propeller is strange and cannot be replaced unless you order directly from Kavan/SIG. To get the plane to balance you must use a heavy 7-cell NiMH battery. The landing gear is very weak. [:'(]

Once I completely replaced the stock motor system with a Graupner 300, 5:1 gearbox and APC propeller, the plane could actually get off the ground. I then found the controls were overly sensitive and had to set the end points at less that 50%. Thank goodness I had a computerized radio with end point adjustment! For the first flight, the plane flew OK until the firewall let loose due to the increased power of the Graupner motor! I spent a lot of time and effort to correct the problems on this relatively expensive ARF. I then pulled the motor and electronics out of the Bloody Mary to put in a Great Planes BLT.

The BLT flies wonderfully!

SIG makes fabulous stuff and I could not be happier with my SIG Kadet LT-40 and Kadet EP. The Bloody Mary is over priced, under powered and over weight!