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Tool Wanted Speedmaster Charts for Pitch Gauge

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Indicator movement x 360 / # degrees = pitch

My "standard" is to measure 15* of the LE and 15* of the TE at 75% from the C/L.

For example the LE on some 1667's I just checked was:

0.180" x 360 / 15 = 4.32"

I've found that LE pitch will tell you pretty close what speed the prop is capable of, with zero slip it's:

pitch in inches x rpm / 1057

For that 1667 it's: 4.32 x 24,000 / 1057 = 98.1 mph. If you have a clean running boat 15% slip works well so 98.1 x 0.85 = 83 mph.

I checked this audio tach app with the data logger on my SAW boat and it's surprisingly accurate: Engine RPM

My 90 boat with the above prop ran 82 in this vid with the Sky RC GPS. TMI!

 
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I use a WOODs gauge.. BUT picked this Speedmaster in a buyout.. if the Speedmaster came with charts it would be good to get a set back with this gauge.

Thanks for posting TK.. your info is invaluable to us all!

Grim
 
Zimmerman said:
Just got back in town and will send this week.
Click to expand...
Hi Richard Sorry to bother you with this but I wanted to see if you might still have a way to send me or post the speed master charts ?. Grim is sending me a speed master prop gauge and I would like to have the charts .Its been a while and he mentioned that he only had the gauge. Thanks Dave
My email is [email protected].
 
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Grimracer said:
I use a WOODs gauge.. BUT picked this Speedmaster in a buyout.. if the Speedmaster came with charts it would be good to get a set back with this gauge.

Thanks for posting TK.. your info is invaluable to us all!

Grim
Click to expand...
Just a curiosity thing, what is the difference between the Woods and the Speedmaster gauge system?
 
Nothing Don. They both measure the same way. I think the step measurement are even done the same. 1/8" The one Mark and I have use a 1/8 and 1/4 spacer. Still wish I knew where my went. Mark borrowed my rotary table years ago to make himself a pitch gauge after he seen the one Andy B was using. Andys was a hughey on a larger handle. When Mark return the rotary table he handed me one he made for me. I thought it was a good trade.
Mike
 
DON MAHER said:
Just a curiosity thing, what is the difference between the Woods and the Speedmaster gauge system?
Click to expand...

The Woods gage is like the old Hughey unit, move a certain distance down the blade and measure the degrees of rotation it takes to do it.

The Orlic gage (Speedmaster) rotates the blade a certain number of degrees and an indicator measures the distance the blade would advance (pitch).
 
I received the cards from Richard . Thank you so much for these. I wanted to post them so if anyone ever needs them they will be here.
 

Attachments

  • Speedmaster Pitch Guage.pdf
    42 KB
  • Pitch Guage Step Height #1.pdf
    49.8 KB
  • Pitch Guage Step Height #2.pdf
    57.3 KB
  • Speedmaster Pitch Guage #2.pdf
    41.8 KB
  • Pitch Guage Step Height #3.pdf
    55.9 KB
  • Pitch Guage Step Height #4.pdf
    38.8 KB

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