RCU Forums - View Single Post - Advice needed on electric power for 2m and 100" sailplanes
Old 02-03-2016, 11:05 AM
  #5  
USSBB57
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Thanks, that's very helpful and confirms my plans to date.

I selected the same motor for the Riser 100, but it'll be the second project.

I've decided to build the Astroflight Challenger first and have the required stuff on the way.

I'm using this motor in the Challenger:

https://www.hobbyking.com/hobbyking/...dProduct=69389

Spec.
Battery: 2~4 Cell /7.4~14.8V
RPM: 1100kv
Max current: 22A
No load current: 1.6A
Max power: 315W
Internal resistance: 0.077 ohm
Weight: 73g (including connectors)
Diameter of shaft: 5mm
Dimensions: 35x30m
Prop size: 7.4V/12x6 14.8V/8x4
Max thrust: 1100g

Along with a 30A ESC and 2200mAh 3S 30C battery packs.

I'm using a 40mm alloy folding prop spinner and I'm going to try both 10-6 and 11-6 propellers with it.

I've selected the same transmitter and receiver package, along with HXT900 servos. I might decide I want more bells and whistles later, but this is leaps and bounds ahead of what I had when I stepped out of the hobby 15 years ago.

I ordered a balanced charger as well. I have a watts meter I use to monitor the solar power system in my observatory, I've also used Eagle Tree data loggers with the optional power panel for several years on DPVs, which should address the same needs in term so determining current in static tests, as well as overall current use. Weight wise, I should be able to fly the data logger with minimal impact on overall weight until I decide what if anything I want to do with telemetry.