I finally finished my On Axis. This is a relatively new pattern foamie from DW Foamies. The build was pretty straight forward with few surprises atypical builder's kit. The hardware and parts well made with ball-links and no “Z” bends.
First flights were the recommended 2814-1400KV motor with an APC 11x5.5e prop. This turned out to be a mistake. This prop is beyond the capability of the motor taking 53 amps for a motor expecting no more than 40. I could not finish the masters pattern, getting only about four to four and one-half minutes on a 2700 battery. Vertical was not that remarkable especially over 500 amps on a 24-ounce airplane. This plane really can't take more nose weight so a replacement motor would have to be the same weight as the recommended one. I wound up replacing it with an Electrifly Rimfire .15. This is exactly the same weight, but with a lower 1200KV and more amp capability. Running the same prop, amps went from 53 down to 37 and RPM reduced slightly from 9900 to 9700. In the air, performance was very close. With a 12x6 prop, the load was a respectable 43 Amps, and performance was way up. This gave me about a six to seven minute flight, enough to do the masters routine (barely).
Now that I have a few flights on the bird I really like the On Axis. It requires little mixing. All of the new masters pattern are easily done with this plane. Spins take a bit more up than we are used to with the built-up airplanes, but are reasonable with consistent exits. Snaps are predictable and crisp very unusual for a light foamy.
- Balanced about one inch forward of the recommended CG now about the center of the aileron servos.
- Slightly larger wheels used 2" to handle my flying field.
My setup is:
Radio: Spektrum 18, AR600C DSMX receiver
Servos: Futaba S3156 digitals
ESC: Castle Ice Lite 50
Battery: Thunder Power G6 Pro Lite 3S 2700
Motor: Electrifly Rimfire .15
Prop: APC 12x6e
This is one of the few small airplanes capable of flying our maneuvers well – now there is no excuse to get the after work practice in.