32" hotr 90+mph

[Fluid]

The offset rudder is a big help. Another thing my boat is heavy so it is very planted.

Two 'secrets' to help a cat get going very fast....


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[Howard Lee]

I just ran mine about a week ago and was amazed how well it holds the water (not going as fast as you but still fast enough to blow it over). The only problem I have is the torque roll/torque steer. I have an inline prop and it seems to be pretty finicky.

If the prop is out of balance, it wont turn nearly as high RPM either, the boat will be slower. You will let us know if you confirm 100, right?

With a single motor the left side will lift. I have my 5s on the left and 4s on the right, i like the left side to be slightly heavier. My boat has a slight pull to the right but under full throttle it go's straight. If i had torque steer in this canal at my speeds it could go bad. Also i spend a lot time checking that my steering is tight and no flexing. The offset rudder is a big help. Another thing my boat is heavy so it is very planted. If the weight your adding adds hp then do it. I got the wife up to vid but its to windy. I'll try 2morrow, i really want it on vid.

[keithbradley]

I just finished rebuilding this ABC but its my 1st rebuild, so if the weather is good ill try for a run. I need to see if the 100 is a glitch or it is what it is. If the prop is off to much i will not run it, it will only damage the drive shaft and bushing. If this hits a 100 i will stop showing my speed test and build 1 for saw. This hull was very steady in the water at 100 thats why i think it will go 110+.

I just ran mine about a week ago and was amazed how well it holds the water (not going as fast as you but still fast enough to blow it over). The only problem I have is the torque roll/torque steer. I have an inline prop and it seems to be pretty finicky.

If the prop is out of balance, it wont turn nearly as high RPM either, the boat will be slower. You will let us know if you confirm 100, right?

[Howard Lee]

I just finished rebuilding this ABC but its my 1st rebuild, so if the weather is good ill try for a run. I need to see if the 100 is a glitch or it is what it is. If the prop is off to much i will not run it, it will only damage the drive shaft and bushing. If this hits a 100 i will stop showing my speed test and build 1 for saw. This hull was very steady in the water at 100 thats why i think it will go 110+.

[Fluid]

I was running 45,000 to 55,000 RPM's, were you running in this range?....I have found with the V900 props that if they do not hook up right away you need more RPM. How do you feel about this Jay?

I was running around 40K for the records. You may have to work at the best adjustment for the v900s, I thought I could run on the tips like we do with hydros but no. Too deep and they lift too much, but at the sweet spot they worked great.



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[Howard Lee]

I'm thinking about building a new boat that will run 110+. Building this boat to sell but ready for saw. I will do some more testing with the boat i have now to see if i can really do it. Just look out for the Howard Lee special.

[Howard Lee]

Hi:

Howard my ESC Turnigy 180 and the propeller is to octura X640 and my gps is running 54mph, I run a little more mph...

The 1st thing i would do is set the prop angle to 3.0 mm and then adjust your batteries to were the boat rides good. When you get the bow to have a hop then move the batteries a 1/4 forward until the hop is gone. Before going with a bigger prop you need your setup right or you will just pull more amps then you need to. You should do 60 with no problem. When i started i had that same setup and run 60 but i don't remember what prop i used, i have 15 props and many test runs. I would say try a x442 and check your speed. If you have problems with steering you might want to think about a offset rudder.

[yiyito]

What esc do you have? I have a swordfish 240hv and run it on the middle setting. What are you look to get out of your boat? Are you happy with just cruising the lake or something faster then that?

Hi:

Howard my ESC Turnigy 180 and the propeller is to octura X640 and my gps is running 54mph, I run a little more mph...

[RandyatBBY]

I have had great luck with the v900 props on some cats for SAW runs. But the v947/3 has a lot more blade area than the P230 and may overload your motor - or not. The only way to tell is to actually try it. The v942/3 may work fine too.

The v900s do have a fair amount of lift although not nearly as much as the 1700, 2000 or 2100 series.
You will have to experiment with prop depth on your cat, I had to run my strut centerline even with the sponson bottoms with a bit of down angle at the prop end of the strut with the v900s, but that will vary depending on the hull.
Sometimes moving the CG back is needed, sometimes not.
It will take awhile for the v900 to hook up off the beach, be patient.


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Great info Jay. It could be the reason my set up did not work on my cat. I will have to try your set up. I had the shaft center line about 3/8 above the ride pads. you ran it much deeper. We have a SAW coming up next month in L.A. the SC27 and the SC33 will be tested with this change one at a time. I was running 45,000 to 55,000 RPM's, were you running in this range?


I have found with the V900 props that if they do not hook up right away you need more RPM. How do you feel about this Jay?

[Fluid]

What do you think about a octura v947/3?

I have had great luck with the v900 props on some cats for SAW runs. But the v947/3 has a lot more blade area than the P230 and may overload your motor - or not. The only way to tell is to actually try it. The v942/3 may work fine too.

The v900s do have a fair amount of lift although not nearly as much as the 1700, 2000 or 2100 series.
You will have to experiment with prop depth on your cat, I had to run my strut centerline even with the sponson bottoms with a bit of down angle at the prop end of the strut with the v900s, but that will vary depending on the hull.
Sometimes moving the CG back is needed, sometimes not.
It will take awhile for the v900 to hook up off the beach, be patient.


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[Howard Lee]

I have 2 ABC props here that are the same way. In my experience they have a more "finished" look to them when they are raw than the octura's do, but they are much more heavily biased to one side. Both of mine were way off too. You have to remove a lot of material from one blade to even get it close.
It looks like it ended up working quite well once you got it sharpened and balanced though!

I like your big boat and i really like that motor and esc setup. back to props.

[Howard Lee]

Howard, the ABC props are MORE efficient than the Octura x series props.

There is also a little 4.43" of pitch hiden in the trailing edge of each blade. :-)

Im going to work on this abc to see if i cant get it right. It is a very well made prop and it did get me to a 100

[keithbradley]

I just did a balance and a sharping. The problem was that 1 blade had the weight of 2. I'm no pro with props i can just do the basic. I know i need to clay the prop to check the shape or something like that. I will try this 2047 and if is off then i will get a pro.

I have 2 ABC props here that are the same way. In my experience they have a more "finished" look to them when they are raw than the octura's do, but they are much more heavily biased to one side. Both of mine were way off too. You have to remove a lot of material from one blade to even get it close.
It looks like it ended up working quite well once you got it sharpened and balanced though!

[Howard Lee]

Hi, Howard I have a leopard 4082 1500kv 6s 5000 mAh in my genesis, I'm new to the boats and I'm lost in that the motor timing????

What esc do you have? I have a swordfish 240hv and run it on the middle setting. What are you look to get out of your boat? Are you happy with just cruising the lake or something faster then that?

[carlcisneros]

Howard, the ABC props are MORE efficient than the Octura x series props.

There is also a little 4.43" of pitch hiden in the trailing edge of each blade. :-)