foot obstacle造句

• Takeoff from turf was in 250 feet with 575 feet needed to clear a 50 foot obstacle.
• Pianists don't make careers by stepping over two-foot obstacles; they scale instead the mighty falaise.
• *Five figure 8 s around pylons, keeping all parts of machine inside a circle whose radius is 300 feet . * Climb out of a square field 900 feet on a side and attain 500-feet altitude, keeping all parts of the machine inside of square during climb . * Climb 3, 000 feet, kill motor, spiral down, changing direction of spiral, that is, from left to right, and land within 150 feet of previously designated mark . * Land with dead motor in a field 800 feet by 100 feet, assuming said field to be surrounded by a 1O-foot obstacle . * From 500 feet altitude land within 100 feet of previously designated point with dead motor . * Cross-country triangular flight without landing, of approximately 60 miles, passing over the following points : starting from North Island, over Del Mar, La Mesa, Coronado Heights . * Straightaway cross-country flight of about 90 miles without landing from the vicinity of Santa Ana, California, to North Island, California.