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The RC slope flying in Colorado is excellent if you can deal with rocky or brushy landings. The thermal flying is great. Unfortunately I live in an area named Sand Park and it lives up to its name. This makes power flying rough on the engines. This also partly explains my interest in pusher configuration airframes.

Recent articles on RC & UAV topics:

Relative Energy Density
Electronic Speed Control (Source code)
Model Design for Airborne Sensors

TBP 1 Sitting Wing 1
Mobius Mobius Ed and his flying dog