Propeller's SLIP ( yeahhhh oupsss )

[dompie99]

Hi guy's,<br /><br />It popped into my mind that there is no such things as PERFECT except obviously...My Wife ( laugh)but seriously.<br /><br />I have a customer that's willing to go a very far route to '' surpass '' almost every living engine on the area..<br /><br />With An Hydrostream, Vision, 17', and an Mariner eng. 175hp, ready to be jacked and set back 10''. The Prop is a Cleaver 28'' .<br /><br />What could be the slip % that we maight expect IF every thing is set right ?? .<br /><br />and what would be a '' start point '' for parameters like Raise, set-back, and max RPM on this engine. (1993 Mariner 175, 2L )<br /><br />Jacko

 

[gatorred]

Re: Propeller's SLIP ( yeahhhh oupsss )

slip is bassed on rpm /speed what speed should be, to what it realy is = slip mine alum slips more then ss, i know cleaver is racing prop so slip will be less then mine <br /><br />boat motor 28 pitch 1.62 gear ratio running 6000 rpm <br /><br />28/1.62=17.28<br /><br />17.28 x 6000 = 103680 <br /><br />103680/63,360=1.63 miles per minute <br /><br />1.63 x 60= 97.8 mph <br /><br />97.80 x .85 = 83.13 with 15% slippage <br /><br />this is sample way to figure out slip just run your boat and see what your speed is this should help

 

[bb_ed]

Re: Propeller's SLIP ( yeahhhh oupsss )

Here is an online calculator: http://www.boatramp.com/prop_applet/PropAnalyzerAppletG.html. Also a man is selling instrument for mounting in the boat that does some real time calcualtions. Look at www.datatach.com