The Voracity tuning thread

[revoltrunner]

The rest of the parts came.
Leopard 4082 2000kv 5s X642
Seaking 180 v2

[Voracity]

Nice. Does the Leopard fit in the standard engine mount?

Why 2000 kV and not 1400? Which prop do you use and which top speed do you expect with this setup?

[rayzerdesigns]

if he runs that on 6s I would say 70

[Voracity]

It says 5s in his disxription but 6s should be possible i assume?

[revoltrunner]

the Leopard fit just fine.
That's the same motor and esc I have in my genesis.
I run that on 5s and its plenty fast. I ran it on 6s once
and turned into a airplane....lol
octura X642 on both. I will probably try a X645 on the voracity
once the weather gets a little better i'll try it on 5s and 6s with
different props.

[Voracity]

Cool, i'm interested what will be the best setup. Could you explain difference and your choice for 4082 and not 4092? And 2000 kV and not 1450? I am a newbie so still learning.. Thx

[revoltrunner]

I had the 4082 on hand.
If I to buy a motor I would have bought the 4092 1730kv
or the 4082 1800kv the boat is so light that I didn't feel
the need for a lower kv motor and higher voltage.

[Voracity]

If the kV is the same als the standard engine, Will it be any faster?

[revoltrunner]

if you use the same kv motor it wont be faster.
you would have to buy a bigger esc and
increase the voltage to go faster.

[kfxguy]

Not necessarily true. If the motor put in place of the original has more power even though it's the same kv, it can turn the prop faster. I'll give you an example. I have a 37" cat with a good bit more powerful motor and almost the same kv (1640) and it goes 80mph on 6s. Same prop I used on my voracity I went 58 on 6s. The voracity motor is 1650kv. This cat I'm talking about weighs a lot more than my voracity. I know a cat is more efficient but I've seen only about a 7-8mph difference between two similar sized cat vs mono hulls with the same setups in them on the same voltage with the same props. 1500kv (again more powerful motor than the stock motor) with the same prop again (I like the 1915 abc) on 6s in my kbb34 mono (much heavier than a voracity) went 70. Just some examples of how the kv doesn't alway dictate your speed. I always like to over motor a lot of my setups because I don't have to turn as much rpm and it doesn't stress electronics as much.

[Rafael_Lopez]

Revoltrunner, great looking boat you got there. Glad to see people building up the hulls from scratch. BTW, the stock prop is a x645 equivalent.

Voracity, I'd stay with a x4 or x6 series prop and stay away from props with a high rake. If you change to a stinger like he has, then it wont matter because you can dial in some negative to make up for props with a higher rake. You can always go larger on the prop if you can detongue it or even detongue it and cut it back. That should lessen the load, but give you plenty of push to get the speeds you want.

As far as the motors of different brands, and same KV having the same output, the Leopard is a 4 pole motor which will have more RPM than a 6 pole motor. This is because the 6 pole motor requires more power to break the magnetic field of the rotor to get it going, and keep it spinning. On the bench, a 4 pole motor will draw less amperage (usually) than a 6 pole, but the 6 pole will create more torque which will require less amperage when loaded up with the same prop as a 4 pole. I hope that makes sense.

[paulfromtulsa]

Revoltrunner, great looking boat you got there. Glad to see people building up the hulls from scratch. BTW, the stock prop is a x645 equivalent.

Voracity, I'd stay with a x4 or x6 series prop and stay away from props with a high rake. If you change to a stinger like he has, then it wont matter because you can dial in some negative to make up for props with a higher rake. You can always go larger on the prop if you can detongue it or even detongue it and cut it back. That should lessen the load, but give you plenty of push to get the speeds you want.

As far as the motors of different brands, and same KV having the same output, the Leopard is a 4 pole motor which will have more RPM than a 6 pole motor. This is because the 6 pole motor requires more power to break the magnetic field of the rotor to get it going, and keep it spinning. On the bench, a 4 pole motor will draw less amperage (usually) than a 6 pole, but the 6 pole will create more torque which will require less amperage when loaded up with the same prop as a 4 pole. I hope that makes sense.

Why stay away from props with high rake? I run a abc 1915 with 17 rake. I got 62mph with the stock motor. I have had good success with this prop. Would I get better results with another prop

[Rafael_Lopez]

I didn't get the results I was looking for with props that had high rake, during testing. The boat is a bit loose as it is and the narrower thrust come of the higher take prop tens to make the boat run even more dry than it already does. In sure one could tune it out with the little adjustment in the strut and by adjusting the trim tabs, Or even by running the batteries further forward. I guess my opinion is based on running more of a neutral setup.

You say you run the stock motor, do you still run the stock ESC? Any adjustments to the strut or trim tabs?

Let me edit and say that high rake props work well for SAW runs but tend to push too much in the turns, which is why I felt a high rake prop didn't fit the boat well as a RTR. I needed a lifter prop that provided good speed both in a straight line and in a course.

[Brushless55]

If the kV is the same als the standard engine, Will it be any faster?

Yes, but it depends on what motor you choose.

Not necessarily true. If the motor put in place of the original has more power even though it's the same kv, it can turn the prop faster. I'll give you an example. I have a 37" cat with a good bit more powerful motor and almost the same kv (1640) and it goes 80mph on 6s. Same prop I used on my voracity I went 58 on 6s. The voracity motor is 1650kv. This cat I'm talking about weighs a lot more than my voracity. I know a cat is more efficient but I've seen only about a 7-8mph difference between two similar sized cat vs mono hulls with the same setups in them on the same voltage with the same props. 1500kv (again more powerful motor than the stock motor) with the same prop again (I like the 1915 abc) on 6s in my kbb34 mono (much heavier than a voracity) went 70. Just some examples of how the kv doesn't alway dictate your speed. I always like to over motor a lot of my setups because I don't have to turn as much rpm and it doesn't stress electronics as much.

Agreed
the motor will be more effective at spinning the prop

[Tamelesstgr]

The rest of the parts came.
Leopard 4082 2000kv 5s X642
Seaking 180 v2

This looks really nice, are you going to change your screen name to VoracityRunner?