I am also working on gathering all the parts for an Arducopter like quad based on the Hobby King Quadcopter frame (55cm) and using the Hobby King hexTronik DT700 Brushless Outrunner 700kv (900g thrust).

 

What size propellers would I need for a slow, stable, but heavy lift flight? I do not want to maxing out the motor Amps, prefer not even going much past 75%. Also how many propellers should I get all at once with the expectation that some will break?

 

The motor is a bit heavy at 78g. Here are the specs from the Hobby King website:

 

Looks can be deceiving. This outrunner is around twice the size of a towerpro bell motor, and swings a much larger prop. Its the motor used on some of Art-techs new plane kits, which is testiment to its durability, ease of use and quality.
The DT700 will swing an 11x4.7 SF prop nicely, to produce more than 900g of thrust.
Its great for larger GWS foamies or parkfly planes.

Spec.
Required Voltage: 11.1v
Suggested Battery Capacity: 1300mAh +
Suggested Prop: 10x4.7, 11x3.8 or 11x4.7
Max current draw: 13A (with 11x4.7 prop)
Max thrust: 900g+
No Load Current: 1.2A
Shaft: 4M (perfectly suited to Towerpor/GWS SF Slow Fly props)
Weight: 78g
Diameter: 41mm
Overall length: 77mm
Kv: 700rpm/v
Comes with mount as shown in Image

Test Report.
We used this outrunner to power the an Art-tech Pitts. Run with a 1300mAh 3S1P 20C pack, 18A BESC and 1147 GWS/Towerpro prop, the Art-tech pitts ran nicely. Excellent climb rate, though not hoverable, and with 13minute flight times or more, we were very impressed. A very efficient outrunner for slower flying models of up to .15 size.

 

The quad frame is:

Height: 200mm
Witdh: 550mm
Weight: 195gram (No electonics)
Skid width: 256mm
Ply Wood: 3mm

Clearance: 
Underside of main frame: 115mm
Underside of Camera support: 35mm

 

 Thank you for your advice!

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