Number cells/Motor Kv/Prop Size/Hull Size

[RayR]

That is the speedo I referenced. these lipo's should do fine:

http://www.hobbyking.com/hobbycity/s..._40C_Lipo_Pack

You need 2 (two) of them.

All the best,

Ray

[agressive1]

Ok how come they are named different, kinda weird, would they be copys.

Sorry kinda new to all this

[RayR]

the Turnigy speedo is made by Hobbywing, just rebadged. They are identical.

[agressive1]

Ok

Would you know how long my runtimes would be and what speeds i should be getting?

[RayR]

Mid to upper 40's and right on the edge of your 10 minute requirement.

You may want to consider the 6500 Mah cells from Hyperion to maximize the runtime, but they are significantly more expensive.

[m4a1usr]

I personaly dont think your going to get a reliable 10 min run time out of a Feigao motor in anything but a very, very mild setup. Most Chinese motors only have an eff. rating in the low 80's if that in all honesty. So if you are running a 22.2 volt system and plan on no more then 80 amps continous or average, doesnt matter for the most part, that means you are going to be generating 1776 watts. 80% of that is 222 watts. Thats what the motor is going to need to disipate. They dont have openings in the ends to remove the heat surrounding the rotor. A water cooling shell will do some work but not the bulk of it. I bet the motor doesnt last as long you may expect it to. Just my opinion, my 2 cents.

John

[agressive1]

Thanks John and Ray

I have been told this setup by another person.

To run any 5000mah 14.4v LIPO batterys in parallel x2
Feigao 2073kv 8xl
The same ESC as Turnigy just a rebadged one
42mm propeller

What do you think of that?

What

[m4a1usr]

Thanks John and Ray

I have been told this setup by another person.

To run any 5000mah 14.4v LIPO batterys in parallel x2
Feigao 2073kv 8xl
The same ESC as Turnigy just a rebadged one
42mm propeller

What do you think of that?

What

Not going to be anything fast on a 540 8XL can. Just not enough power to push a 37" hull the speeds you want. If you want to go with a chi motor at least use something along the lines of what Ray recommended. The 580L or maybe a Keda45 but again if you want some decent speed, in the 40's, and want a 10 min run time you should look at the larger outrunners available. The Little Screamer, or a Scorpian, motors like those. Lots of power to push that hull around all day long. As far as a speedo have you looked at the himodel gx200? You can find them for about $60. A large outrunner will be about $160 or less. Those 2 will get that hull up on plane. And you can move up to a realistic prop. Probably something in the 50 to 55mm range. OSE has just become a dealer for Scorpian so ask Steve what an HK4025-1100kv will cost you. Thats 2200 watts on 6S at 24k rpm.

John

[agressive1]

John with that setup your telling me im guessing it will be quicker then the above 580xl setup i was told, but how will the batterys last?

Ill look further into this as well and see whats easily available for me down in Australia.

[m4a1usr]

John with that setup your telling me im guessing it will be quicker then the above 580xl setup i was told, but how will the batterys last?

Ill look further into this as well and see whats easily available for me down in Australia.

I dont think it will necessarily be any quicker with a 580 size can if you prop them the same and the kv is similar, but the outrunner will remain cooler without a doubt. And with a larger rotor you should have a greater selection of props to choose from when perfecting your setup.

John

[RayR]

....

[agressive1]

Ok

So im going to go for a 580 sized motor and the ESC as recommended above.

[agressive1]

Ok, So my final setup will be something like this

Feigao 580 12L
Turnigy 180A ESC
Turnigy 22.2v 6S 5000mah LIPO X2 in Parallel
X450 Prop or something bit bigger

How does this sound?

Also what type of servo is recommended, metal geared or plastic?

[Mel279]

Ok, So my final setup will be something like this

Feigao 580 12L
Turnigy 180A ESC
Turnigy 22.2v 6S 5000mah LIPO X2 in Parallel
X450 Prop or something bit bigger

How does this sound?

Also what type of servo is recommended, metal geared or plastic?

Thats a fine setup, try it first with that prop, if it run slow then u can change to a bigger prop, but remember to check the temp after u run it for a minute. Go for a high torque metal gear servo.

[Mel279]

Ok, So my final setup will be something like this

Feigao 580 12L
Turnigy 180A ESC
Turnigy 22.2v 6S 5000mah LIPO X2 in Parallel
X450 Prop or something bit bigger

How does this sound?

Also what type of servo is recommended, metal geared or plastic?

Thats a fine setup, try it first with that prop, if it run slow then u can change to a bigger prop, but remember to check the temp after u run it for a minute. Go for a high torque metal gear servo.

[agressive1]

What should the temps be when i run it for a minute and what should the overall temperature be when i have ran it for the full battery?

Or is there a temperature range it should be in between, degrees preferable thanks.

[agressive1]

Anyone know what the temps should be at with my above setup?

[ryan_t888]

No more than 140F in my books. This applies for battery/esc/motor. Cooler the better

Ryan

[agressive1]

ok sweet

[agressive1]

Is it better if i have 2 water pick ups, one for the motor and one for the ESC.

Or should i have just one first going to the ESC then motor?

[ryan_t888]

Have one fast flowing line. The only reason for 2 is if 1 is not sufficient enough.

Ryan

[agressive1]

Ok i think i will have 2x pick up lines or ill have a Y piece on the pickup to create two.

[ryan_t888]

Or you will just go through the esc and then through the motor

Ryan

[agressive1]

Ok i have bought all my hardware and hull and also Lipo batterys, i had gotten the FlightMax ones supposebly they are slightly better, who knows.

Now i need my ESC and Motor, i thought i will order it from this sites store although was wanting to know if this sites shopping store does warranty on items as i here that the Feigao 580 motors burn out fairly quickly.

Or is this an older myth?

[ReddyWatts]

I think the Feigao 580 motors are good quality for the money.
You will not find any FE site that handles warranty claims better than OSE!

[Steven Vaccaro]

Ok i have bought all my hardware and hull and also Lipo batterys, i had gotten the FlightMax ones supposebly they are slightly better, who knows.

Now i need my ESC and Motor, i thought i will order it from this sites store although was wanting to know if this sites shopping store does warranty on items as i here that the Feigao 580 motors burn out fairly quickly.

Or is this an older myth?

The 580 motors are a good motor for the money and put out a good amount of power. But there is a limit to what they will put out. For instance in a recent post talking about a blown 580 motor, It turns out that he was racing against boats with 1527 neu motors. I can say that they will NOT compete with a Neu 1527 motor. Its just out of its league. They are more in line with a 1515 or 1521 in terms of output watts.

[agressive1]

Hey Steven

What NEU motor is suggested for my boat then, its a 37.5" Mono Hull, i will be running a Seaking 180A esc and 2x 22.2v Lipo 5000mah 6s lipos in Parallel.

You told me the Neu 1521 in a email but what KV rating do i go for or should i go for a 1527 and what KV do i go for.

Also what speeds will i be looking at and what run time?

[agressive1]

Anyone know what Neu motor?

[ryan_t888]

1521 1Y
1527 1.5D

Ryan

[agressive1]

Hey Ryan

What does the 1y mean and the 1.5D mean. Im guessing the 1527 is faster then the 1521

Is the Feigao 580 8l much faster then the 12l? or do i need the 12l for the size of my boat 37.5"?