Quote:
Originally Posted by Dave R
I have GPS, a paddle wheel, and a pitot. All three report speed fairly closely on plane.
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WOW! I have a VDO speedometer with a pitot. It's reading is all over the place compared to my hand held GPS. At 25 mph the GPS reads 30 mph. At 45 mph my GPS read 40. At WOT it is 60 mph versus 68 mph on the GPS.
My on plane speed is 30 mph on the GPS compares to 20 mph on my speedometer. Last night I was out after dark and use my GPS to maintain 25 mph. My boat won't plane and put out one heck of a wake!