Stop and Go Locomotion For scaled up design Jeff Knowlton Rover Power Stop and Go Locomotion For scaled up design Jeff Knowlton [Jeff Knowlton] [Power] 1

[Jeff Knowlton] [Power] Test the possibility of a stop and go technique of locomotion to reduce solar panel size Fix panel size and adjust motor size Base batter size on motor size (much cheaper than larger panels) [Jeff Knowlton] [Power] 2

[Jeff Knowlton] [Power] 3

[Jeff Knowlton] [Power] Assumptions Battery can operate rover for one hour with 5% cushion 22% solar power efficiency Drive /charge for full hour intervals [Jeff Knowlton] [Power] 4

[Jeff Knowlton] [Power] Initial Values Driving motors – 820 watts (745 watts driving 75 watts steering) 25 watts for idling Panel area of 1.44m2 [Jeff Knowlton] [Power] 5

[Jeff Knowlton] [Power] Beyond the span of arrow the ratio of hours charged to hours driven [Jeff Knowlton] [Power] 6

[Jeff Knowlton] [Power] The two black likes are of equal slopes, indicating a 1 hour drive to 1 hour charge with a 2 to 1 dividing them [Jeff Knowlton] [Power] 7

[Jeff Knowlton] [Power] Panel Area M^2 Motor Watts Battery Watt-hours Drivable time Battery mass kg Number of battery cells Model 1.44 820 940 98 ~7.7 6 Model NCP43-1 615 715 121 ~6.4 4 Model NCP55-1 410 490 195 ~4.5 5 Model NCP25-1 1 65 87 131 [Jeff Knowlton] [Power] 8

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