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Old Feb 19, 2012, 12:44 AM
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Question
octura props, whats the dif. between X and M??

Ok this may be a stupid question but what i s the differance between octura X and M props?
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Old Feb 19, 2012, 04:14 AM
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The M series are X's that have been detongued.
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Old Feb 19, 2012, 04:30 AM
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Just to carry this a bit further:


X4 are low lift general purpose props
M4 is similar to X4 but with the tongues removed to unload the prop
Y are similar to X series but have 10% more pitch
X5 are similar to X4 with medium lift and more pitch
X6 similar to X4 and X5 with medium-high lift
14 are medium-high lift commonly used for hydros
16 are high lift props for riggers and hydro's
17 are the highest lift prop for riggers and hydros
P7 are similar to 17 series but more rake and slightly less lift
19 are high lift for riggers and hydro's
V9 are moderate lift and high pitch suitable for riggers, hydros and SAW racing
20 are moderatley high lift with high pitch suitable for riggers and hydros
21 are high lift for riggers and hydro's
22 are high lift, highest pitch surface drive only good straight line speed
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Old Feb 19, 2012, 10:50 AM
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Wow info overload lol, thanks guys
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Old Feb 19, 2012, 03:54 PM
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This is fantastic info as now it opens my prop choice right up!

I had no idea what the differences were.

Thanks Osprey!

I have a question.............

I have the X437/3 prop, if I went the Y537/3 would that pull more water or less?

Is that a clear question? lol

I'm going to run my 4082 1600kv on 6S & was thinking of the smaller prop for more RPM & if I can have more bight from the smaller prop I'm thinking I'll get more speed.

Would that be correct?
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Old Feb 19, 2012, 03:59 PM
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A Y537/3 would pull more water as you put it but to be honest i'm yet to try anything other than 1.4 pitch as if you prop it right you shouldn't need to increase the pitch, though detonging on the other hand with a M series prop is well worth it as it allows the motors to unwind more.

JMO
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Old Feb 19, 2012, 04:09 PM
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Yeah, I understand that correct propping is the key, however, I want to give this a try to see what results come of it.

I just thought I'd ask about the effect the prop would have.

Another Q......

If I used a 2 bladed prop over a 3 bladed, can I use a larger diameter due to less surface area of the prop?
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Old Feb 19, 2012, 04:17 PM
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You can, if you were going to use a 3 blade prop over a 2 blade then you need to drop a few mm in diameter, for example i was running a X445 on my Pursuit and i now run a X440/3 which is detonged, i then found i got alot better acceleration all round whether exiting corners or standing start though i did have a very slight increase in temps and top speed by a couple of mph.

If going to larger pitch props remember to monitor temps closely as little increase in pitch or diameter can make a huge difference to temps.

The best mods you can do to a prop is too lighten it, balance it and most importantly sharpen it. I can spend many hours doing this to a prop but the difference it makes is outstanding and best of all it's free.
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Old Feb 19, 2012, 04:27 PM
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Hehehe, yep, sure is free, but, the only cost is cut fingers!!

Done that too many times!
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Old Feb 19, 2012, 04:35 PM
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It ain't sharp until you can cut yourself on it

I usually find i tend to do this when tightning the prop back onto the drive shaft as i tend not to have a towel handy and i don't want holes in my jumpers or jackets so i end up hold a blade between a finger and thumb.
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Old Feb 26, 2012, 04:00 PM
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Ha I do not know if it was lightened much but it sure did cut my flesh just fine, and this was a three bladed prop for a “springer”.
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Old Feb 26, 2012, 04:01 PM
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Oops sorry guys hope I don’t have to hand in my FE card now….
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Old Feb 26, 2012, 07:12 PM
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Quote:
Originally Posted by osprey21 View Post
Just to carry this a bit further:


X4 are low lift general purpose props
M4 is similar to X4 but with the tongues removed to unload the prop
Y are similar to X series but have 10% more pitch
X5 are similar to X4 with medium lift and more pitch
X6 similar to X4 and X5 with medium-high lift
14 are medium-high lift commonly used for hydros
16 are high lift props for riggers and hydro's
17 are the highest lift prop for riggers and hydros
P7 are similar to 17 series but more rake and slightly less lift
19 are high lift for riggers and hydro's
V9 are moderate lift and high pitch suitable for riggers, hydros and SAW racing
20 are moderatley high lift with high pitch suitable for riggers and hydros
21 are high lift for riggers and hydro's
22 are high lift, highest pitch surface drive only good straight line speed
Does any one know this info about other makes of props, Prather etc.
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Old Oct 14, 2012, 08:06 PM
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Is there a way for me to get the actual meat of this thread “stickied”? I notice the FE forum doesn’t really have a way to maintain information a lot of us find useful.
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Old Oct 15, 2012, 08:58 AM
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Some good information . www.aircapitolhobbies.com/Prop_Charts.html
www.aquacraftmodels.com
www.offshoreelectrics.com/propeller-chart.php
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