rubezahl

I am new to Electric Flight having moved into it from gliders. I am thoroughly hooked! My first electric disintegrated in flight(I guess that hi-G turn wasn't such a good idea) Now I'm building my second and more durable airplane and I need a new speed controller. Apparently, my Jeti JES 30-3p didn't like the fall from 60'. When I hook everything up, my servos jitter like crazy. My new plane is much smaller and I'd like to use a more compact ESC(the Jeti measures 2" x 7/8" x 3/8"). After searching here, I've found one from CastleRC, the Phoenix 25. I want to be sure that its the right ESC for my electrical system. The specs are as follows:

Motor: Mega Motor ACn 16/15/5
Battery: 1100 mAh 2/3 A Nickel Metal Hydride 8 Cells 9.6V
Receiver: Hi-Tec 555
Servos: (2) Hi-Tec HS-55's

From my limited understanding of electrical systems, it appears that it will work. However, after a few incorrect purchases, I'd like to make sure I get the right part. Any info/suggestions would be greatly appreciated.

Matt Kirsch

My Feedback: (21)

Actually, you missed the one most important piece, the propeller.

According to the specifications for the Mega 16/15/5, maximum current should be kept under 20 Amps. Since the Phoenix 25 is rated for 25 Amps, it has plenty of capacity to run this motor up to its full potential.

Just because the motor is rated for 20 Amps, though, doesn't mean it won't draw more. I had mine drawing 22 Amps at one point, using a propeller that was too big, and I am sure the motor will easily draw more Amps than the controller can handle.

On 8 cells, I would not use a propeller larger than an 8x4 APC Thin Electric. That's pushing the limits as it stands.

rubezahl

Thanks for the tip, Matt! I'm currently running a Graupner scale 6.5 x 4 prop. Thinking of experimenting with some racing props (Graupner CAM 5.5 x 4.5) and such. Any suggestions?

Shawn Palmer

You need to have a pretty slick and clean-lined airplane to get the most of the less than 6" props.

If you're looking for speed - try a 6X6 APC - looks like w/that motor and pack, it's as good as it gets for a mix of usefull thrust and flat out speed.

Shawn Palmer
Product Specialist
www.castlecreations.com
[email protected]

LuckyArmpit

Rube, if your gonna be screwin with electrics, get Motocalc version 7. You can setup all different kinds of motors/props/batt packs etc. and it will tell you how many amps the combo will pull,
watts, thrust, etc. Well worth the $35. Just go to
www.motocalc.com

Dave...