question about prather props

[bustitup]

how do these props compare to octura x and m series as far as pitch and mm


prather
b230
b235
s240
b245

[domwilson]

Here's a nice little chart.. http://www.rcboataholic.com/hardware/prop_chart.htm

[kevinlew211]

MOST of Prather prop is 1.6" pitch, let say if you choice a Prather prop with same dia with X4xx prop then you will have more top speed and also more drag and amp draw, i have great result with Prather prop with my hydro and cat.

[egneg]

Here you go ...

http://www.offshoreelectrics.com/propeller-chart.php

Edit: Dang ... you guys are quick!

[domwilson]

Another chart... http://www.funrcboats.com/prop_chart1.htm

[domwilson]

And a Octura chart for reference... http://www.fastelectrics.com/octuraprops.htm

[domwilson]

Prather Props:

Prop #|Diameter|Pitch
215 1.60" 2.5"
220 1.72" 2.6"
225 1.84" 2.8"
230 1.90" 3.0"
235 2.00" 3.2"
240 2.12" 3.3"
245 2.25" 3.5"
250 2.30" 3.6"
255 2.40" 3.8"
260 2.52" 3.9"
265 2.61" 4.0"
270 2.74" 4.2"

[bustitup]

whoa!!!!...that was some quick answers to info I need

I just picked up 3 new S&B prathers from northernboater

b230
b235
b245

and I allready have a s240

my 34" sprintcat with a 1527/1y on 6s2p I guess I will start with the 230 and work up

the boat seems to be getting pretty heavy while i am laying things out

I would like to be able to oval race at a comfortable 60mph and prop up for saw runs and hopefully hit 80

feasable?

thanks guys

[egneg]

depends on the motor you are using. You can get away with bigger props on a lower KV motor with mucho torque. But ... as the KV goes up the props get smaller.

[domwilson]

whoa!!!!...that was some quick answers to info I need

I just picked up 3 new S&B prathers from northernboater

b230
b235
b245

and I allready have a s240

my 34" sprintcat with a 1527/1y on 6s2p I guess I will start with the 230 and work up

the boat seems to be getting pretty heavy while i am laying things out

I would like to be able to oval race at a comfortable 60mph and prop up for saw runs and hopefully hit 80

feasable?

thanks guys

Bustitup, I think with you...feasible, possible, "Get 'er dun!"

I believe you can do it.

Mike Martin did it with a 26" DF hull.

[Fluid]

You won't get near 80 mph with the 1527/1Y. I did hit the mid-80s with the SprintCat running a 1527/1D, but had lots of ESC issues - plenty of amps with that setup!

I tried the p235 with the 1527/1Y and couldn't get it to work very well - but then I didn't do too much testing with it. I had better luck with the x450/3 and x457/3, although the latter is really too much prop for a boat this size - I usually run that prop on my 41" 10S cat. I'm not certain of any heat issues with the x457/3 for oval racing, but the boat was almost undriveable with it. I had to ease into the throttle coming out of turns or the cat would launch itself vertically. I did come close to 60 mph with it though. Still looking for the "perfect" prop.



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