x445 cut down to 41?

[TheShaughnessy]

I thought our (rc boat) props were progressive pitch not fixed pitch. I also thought this is why detounging a prop is advantageous to high end speed. It was my understanding the tounge area has the lowest pitch and becomes a limiting factor for top speed. I guess that doesn't mean the pitch will change in the middle of the blade, but what about at the outer edge?
Also why would you reduce a 47 mm prop to 41 when you can get an x442?

I just picked up an x447 and was thinking about spooning the tips and cupping them to really push a p-ltd motor, will probably end up back cutting also, but i'm gonna run eagletree on it stock to get some baseline numbers before i start any work. Darin Jordan has me convinced that higher rpm is not the absolute answer in going faster. I'm thinking an 1800 kv proboat motor with a slightly larger prop can be competitive with the AQ 2030 motor spinning a smaller prop. I know some people running an m445 on the 2030 motor so i figure i can get away with an x447 on an 1800 kv motor if i do a little work to it. Races are won and lost in the corners just as much as the straights and it is my opinion that a larger prop should be able to carry more speed in the corner and accelerate harder out of one as well. I haven't done any real world testing on this theory so at this time it is simply that, theory and speculation. Any thoughts on this prop guys?

[Mike Caruso]

I thought our (rc boat) props were progressive pitch not fixed pitch. I also thought this is why detounging a prop is advantageous to high end speed. It was my understanding the tounge area has the lowest pitch and becomes a limiting factor for top speed. I guess that doesn't mean the pitch will change in the middle of the blade, but what about at the outer edge?
Also why would you reduce a 47 mm prop to 41 when you can get an x442?

I just picked up an x447 and was thinking about spooning the tips and cupping them to really push a p-ltd motor, will probably end up back cutting also, but i'm gonna run eagletree on it stock to get some baseline numbers before i start any work. Darin Jordan has me convinced that higher rpm is not the absolute answer in going faster. I'm thinking an 1800 kv proboat motor with a slightly larger prop can be competitive with the AQ 2030 motor spinning a smaller prop. I know some people running an m445 on the 2030 motor so i figure i can get away with an x447 on an 1800 kv motor if i do a little work to it. Races are won and lost in the corners just as much as the straights and it is my opinion that a larger prop should be able to carry more speed in the corner and accelerate harder out of one as well. I haven't done any real world testing on this theory so at this time it is simply that, theory and speculation. Any thoughts on this prop guys?

Thoughts in general
If I can run tight FAST on the bouy's I would prop the boat to pull really hard off the corner to 1/2 way point of the straight away. That way I can hopefully get out on everyone a couple of boat lengths ADVANTAGE off each of the two corners x # of laps. I used to think I could just run the other boats down with big top end speed and pass at the next entry. Bottom line is you will need really big/hard acceleration to pull either off.
Pick your poison.
Third choice a balance mix of both.....now it's on the driver!
I always buy two props at a time finish one then mod the other so I have A-B-A testing made easy.

[jkr]

Also why would you reduce a 47 mm prop to 41 when you can get an x442?

My 45 was bend on the tips (not cupped).
So i decide to cut down at 41 and i had no time to wait for other prop.

[TheShaughnessy]

My bad I thougt you went from 447 to 441. Guess I can't read.

[detox]

I know some people running an m445 on the 2030 motor so i figure i can get away with an x447 on an 1800 kv motor if i do a little work to it. Races are won and lost in the corners just as much as the straights and it is my opinion that a larger prop should be able to carry more speed in the corner and accelerate harder out of one as well. I haven't done any real world testing on this theory so at this time it is simply that, theory and speculation. Any thoughts on this prop guys?

Makes perfect sense to me. Fast exiting speeds are good (I learned this from watching NASCAR)