29' Fountain prop slip
 

Hi guys I wanna hear some others prop slip stories. I have a bravo 1 prop labbed by Brett at BBlades great job. Its a 28 1.5 XR. I took it out today and was cruising at 50MPH and spinning 4000RPM. calculators say this is 29% slippage. thanks in advance......

What speed were you using? GPS or speedometer? If GPS speed that slip% is less than ideal. If that speed was off the speedometer I'd get a more accurate source, either radar or GPS for steady state measurements.

Gps

That's really high. I would contact bblades if they did the work.

What power/HP and what speeds and rpm are you getting at WOT???

77 mph 5350 rpm
525EFI
just me 1/4 tank
gps

That's great speed leave it how does it come out of the hole??

it comes out fine total rebuilt engine 20 hours ago.
if i have lots of fuel and people I’ll throw the 26p on mid summer when the humidity is high.

i wanted to hear from other 29’ fountain guys what they are getting. If it’s normal to have high slip that’s fine.

I would be more concerned with seeing 1/4 tank on a fountain fuel gage-lucky if you have fumes left at that point.

That gets it to 18.5% which is still on the higher side, but your top speed seems about normal. People sometimes get too hung up on slip%. My 28 Pantera had similar slip % numbers. The higher slip will help keep the drive alive too. I would bet a 1/2-1 inch drive spacer would help you also. I increased my drive spacer on my Pantera by and inch and slip numbers dropped some. I picked up about 3-4mph at cruise speed and 1-2mph on the top end and it carried the bow better.