Just did the maiden flight on this model airplane today! Three flights were made. The ailerons are VERY effective, and dual rates of 60% were programmed into the DX7 transmitter. The model pretty much flew itself off the ground, with about 6 blips of down elevator required. Flaps are effective, but need elevator mixed in to handle the pitch up motion.
One thing to be very careful of in this and any large electric model with a high powered motor up front. That is going from low to full power when the model is at a very low flying speed. The torque of that motor can rotate even a big 82 inch wingspan model like this one to 45 degrees before you can react with ailerons.(Yup, did that, at 100 feet altitude!)
Wingspan 82 inches
Wing area 898 Sq In
Weight 15.9 Lbs (
10S2P 2300 Mah A123 cells
Castle Creations 80 Amp HV ICE ESC
Hacker A60-5S Motor
APC-E 19x12 propeller
Castle Creations ICE Downloads
Max Power 2232 Watts
Max Current 81.3 Amps
Min Volts 26.9 At 79.8 Amps
Motor on ground 6050 RPM
Motor in Air 7320 RPM
A six minute flight takes about 1/2 the ampere hours out of the 10S2P A123 pack. The take off run is about 30-40 feet, with a very unscale like climb out of 45 degrees or more. The model will easily fly on 1/2 throttle, which represents about 500 watts of power and 4100 RPM on the prop.
The original main landing gear had to be replaced to provide proper clearance for the 19X12 prop. The nose gear was cut off, and about 2 1/2 inches extra was silver soldered in for the extension.
Next things to do are install the wheel pants, and paint the aluminum landing gear. Won't be putting in the windows though, need to hide the battery packs and wiring inside. Can't see it from the ground anyhow.
Take a look at a few photos, attached. Note the eight position Anderson Power Pole connectors, along with the balance connectors just above them. The AP connectors allow charging the battery pack as a 5S4P, and flying the battery pack as a 10S2P.
The LCD display on the far right of the power panel records total flights; total flying time in hours, minutes, seconds; and total ampere hours for the battery pack. After this info is displayed, the flight monitor then switches over to either motor current (up to 100 Amps) when the motor is running, or it shows ampere hours for the current flight when the motor is not running.
The unit on the left is Spektrums flight monitor that records loss of signal in several different modes. During the three flights today, no loss of signal counts were noted, none what so ever.
Receiver power is provided with a Castle Creations 10 Amp uBEC with an isolated two cell 2300 Mah A123 battery pack for backup power.