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Old 02-07-2009, 06:26 PM
  #46  
all_up_in_the_air
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Join Date: Jan 2007
Posts: 112
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Originally Posted by smokejohnson View Post
Jeff can you post the info you have for the 2805-28?
Sure, here is the whole listing. I'll have these motors back in stock in 3 or 4 weeks.

2805-28 Outrunner Brushless Electric Motor
The 2805-28 is a 0.9 ounce 2800KV direct drive outrunner motor that works well on small pusher jets and flying wings, and for many applications where a high speed motor spinning a small prop is needed.
The 2805-28 works well with both two and three cell Lipo batteries. Please check out the prop data below for help in choosing the right battery and prop for your model.
I recommend using the Power Up 20A or 32A ESC, depending on what battery and prop you use. The timing of the ESC should be set to 'soft' (also called inrunner timing), and this is easily accomplished with your transmitter. Clear instructions are provided with the ESC.
MOUNTING OPTIONS: A firewall mount that is secured on the motor with two set screws is included, and the motor can be mounted on the GWS Plastic Outrunner Mount as pictured below if your model has a 10mm stick. You will need to drill a couple of holes to secure the motor to the GWS mount. You will need a 3mm prop adapter or a 3mm prop saver to mount a propeller. The picture below is for reference only. The plastic mount is not included, but is available in our store.


Propeller data for 3 cell Lipo batteries:


The APC 5.5x4.5 prop produces about 16 ounces of thrust at 21 amps. Exceeds recommended maximum amps. Use with caution.
The APC 5.25x4.75 prop produces about 15 ounces of thrust at 20 amps. Exceeds recommended maximum amps. Use with caution.
The APC 4.5x4.1 prop produces about 14 ounces of thrust at 15 amps.
The APC 4.1x4.1 speed 400 prop produces about 11 ounces of thrust at 12.5 amps.
Propeller data for 2 cell Lipo batteries:

TheGWS EP 7035 prop produces about 15 ounces of thrust at 13 amps.
TheGWS EP 6030 prop produces about 13 ounces of thrust at 11 amps.
The APC 6x4 speed 400 prop produces about 13 ounces of thrust at 13 amps.
The APC 6x5.5E prop produces about 10.5 ounces of thrust at 15 amps.
The APC 5.5x4.5 prop produces about 10 ounces of thrust at 12.5 amps.
The APC 5.25x4.75 prop produces about 9 ounces of thrust at 12.5 amps.
TheGWS EP 5030 prop produces about 9.5 ounces of thrust at 7.5 amps.
The above data is a result of my own testing using fully charged Lipo batteries.

2805-28 Specifications:


Weight (motor only) = 0.9 ounces (25 grams)

Diameter = 1.1 inch (28mm)
Total Length = 1.5 inch (38mm)
Shaft Length = 0.4 inch (10mm)
Shaft Diameter = 3mm
Voltage = 7 to 13
KV = 2800
Current = 18 amp maximum for 30 seconds
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