Props, several years ago I put the info for my boat in the Vic Prop calculator.
For a 3 bladed prop it spit out 14×8.8. I put a used 3 bladed 14x10 on her, the 2 bladed 14×11 that came with her was trash. Last season I went with a 4 bladed 12×12.5 meant for a wake board style boat. Looking at the Vic Prop recommendations to reduce diameter & increase pitch, I'm pretty spot on.
Performance wise I feel the boat motors better with the smaller diameter prop. It has a ton of bite. Although I didn't pick up any additional speed at the same RPM's, the SOG remained the same
& my wattage dropped. Depending on conditions at 3-3.5 knots, 700 watts. Between 3.5 -4 knots, 1500 watts. I also would like to try out a larger prop, 15" diameter just to see the difference. I'm retired now so pretty sure my wife would have an issue with that....
One major difference running the wake board prop, I do get regen at speeds over 4 knots. It's not much, 55-100 watts but if you were crossing an ocean it would help. That's all I know 🤣
On Mon, May 25, 2020 at 06:29 AM, Larry Brown wrote:
I Wonder if we can use an adjustment formula to his calculator to get a better ballpark for our motors. Even though he could not come up with reasoning for the discrepancy did he sound interested in it as a challenge or was he just dismissive of us being outliers that represent such a small minority that it's not worth his time to work on? Or did he seem like the kind of guy that enjoys a challenge and may, at this moment, be tinkering around to examine it and give additional inputs that would accommodate electric propulsion.The conversation was in 2011 and I haven't heard anything since, so I'm going to go with the "minority" perspective...
Eric
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