atomic 58 inch catamaran motor question

[cgd2175]

I’m expecting this week 2 props to test, both 3bld CNC from OSE, one is 52mm and the other is 50mm. Also a 2bld CNC of 55mm.
I am used to gas boats and 70-75mm props, and now I’m trying to start and probably convert some of my gas boats to FE. The biggest prop that I have at this time are, Octura M445, X648, a Prather 230 and a GrimRacer 42 x 55 from my Nitro Shockwave.
I´m not sure if these smalls props can put in plane this Cat, I´m learning.
This Atomik ARC 58 is going to be my real entrance to testing, gathering and learning from all of you.
Thank you to all for all the info you are giving me.
Lenny, thank you very much for giving me the members to contact!
English is not my first language and sorry if sometimes I write nonsense things.

[lenny]

Hey glad to help out,
I looked at some of your vids with the gas boats and buggies you have and they look like they run nice.

Hear is some prop info if you need it down the line.

Basics info hear.
http://www.offshoreelectrics.com/propeller-chart.php
http://forums.offshoreelectrics.com/...highlight=list

Jay aka Fluid, Prop files hear.
http://www.impba.net/index.php/boate...-charts/octura
http://www.impba.net/index.php/boate...rop-charts/abc

http://www.abcprops.com/proppdf/PROPSHEET%281104%29.pdf

http://www.funrcboats.com/prop_chart1.htm

http://www.modelgasboats.com/prop-chart/

What is your first language Chris ?
As for English you are doing fine,
I was born hear and I write nonsense all the time.

[cgd2175]

Thanks Lenny, I'm from Greek family, born in Panama Rep of Panama, first lang greek, spanish....then later english.
I worked 12 years in the PPC Panama Canal Com. when was US admin. You can see my Mag57 runing in the Panama Canal jejejejej!!
I am addict with the rc hobby, in one trip to FL I went and met Tony C. from warehousehobbies/bonzisport now... and a Magnum 57 was my first real gas boat, still running amazing!!!!
And now trying to make my ARC 58 more fun

[lenny]

I have a big cat hull that I need to put back together some day,
It had a blow over at 80 mph and the guy was selling just the hull with no hardware.
So I need to find hardware for it and still fix the hull up,
I picked up a brand new 26cc KOS P1 motor to try and run in it.
This is what I have so far for it,
You see it sitting next to a 37"Daytona in the one picture.

Gas cat.jpgGas cat 2.jpgbig gas cat 010.jpgBig Cat & Daytona 001.jpgBig Cat & Daytona 006.jpg

Hear are some links of it's first build before I got it,
Let me know if they work ok.

http://www.jrcbd.com/showthread.php?t=61279

http://www.jrcbd.com/showthread.php?t=61927

http://www.jrcbd.com/showthread.php?t=63641

[cgd2175]

Ray,
Weight: 10.57lbs (without batteries)
Length: 53.5in/1360mm

[ray schrauwen]

You need a BIG motor or twins. Thats heavy but, normal for that size of boat. A big 56mm diameter TP Power motor on 10-12S would do the trick. 600- 800 kv and your big prop it came with.

[Bri6672]

Hey Guys,

I have the ARC 58 and am happy with the stock performance running 2) 6s 5800's in parallel. I'm getting nice 8min run times with the packs still sitting in the upper 3.7's.

So I'm posting cause the motor is running pretty hot so I want to change it out but want to keep running the same packs and ESC (v2 180amps)

I am wanting to run the leopard 5692 1090kv but don't need the 60 plus mph speeds finest racing is getting. I am wondering if anyone knows what that motor will do on 6s? It is 10 less kv than the stock motor and is an inrunner vs outrunner, it is obviously a larger motor so not sure if that makes up the difference in kv??? I just don't want to put that motor in and loose any performance, a nice bump would be nice but not necessary!

Any feedback would be great!

[Finest Racing]

Hey Guys,

I have the ARC 58 and am happy with the stock performance running 2) 6s 5800's in parallel. I'm getting nice 8min run times with the packs still sitting in the upper 3.7's.

So I'm posting cause the motor is running pretty hot so I want to change it out but want to keep running the same packs and ESC (v2 180amps)

I am wanting to run the leopard 5692 1090kv but don't need the 60 plus mph speeds finest racing is getting. I am wondering if anyone knows what that motor will do on 6s? It is 10 less kv than the stock motor and is an inrunner vs outrunner, it is obviously a larger motor so not sure if that makes up the difference in kv??? I just don't want to put that motor in and loose any performance, a nice bump would be nice but not necessary!

Any feedback would be great!

I am at this speed with a different prop. I did not run the current combo with the stock prop. We will run the stock prop when we go back out. I would like to know the difference in speed with prop sizes. Don't be fooled by this boat going 60mph on a lake. Remember the size of the boat and the size of the lake or where you are running. At 60mph, it was not bouncing all over and hard to control. It was a smooth ride. I was actually surprised to see how it was handling the water without any tweaking. I do have the hull marked at the 30% point. So far this has been working with all my boats. When the video is available, we will all see the smooth ride. Who ever came up with the 30% theory was brilliant. Even with the battery tray separated, the boat was still great at full speed. LOL When accelerating and decelerating she was all over. Your thought on using 12s - 1090 x 22.2= 24,198. My goal was to be near 30,000 to be efficient. With my combo - 1090 x 29.6=32,264.
I am not sure if this would be the way to go (24,198) I am not sure if this would cause the ESC, batteries and the motor to get hot. The stock set up with the 1,100kv motor and a 12s set up would be 24,420. The stock setup was also an out drive which will run a little cooler.
Good Luck.

[forescott]

Sounds good, but you won't be able to use the stock motor mount with that motor. Once you put a jacket on it it will be too wide for the mount. I would think the leopard would gain you a little speed being that it is probably more efficient than the stock outrunner, but you may be pushing the limits of that 180 amp esc. I did run a leopard 5692 1340kv on 6s with the t-180 esc with success. But that was in a 45-inch hull.

[forescott]

Ive been waiting for the motor or esc to quit in my ARC since I got it two years ago. I have the first version with the 120A esc. and I run a single 5800mah 25-50c 6s pack. Still running..........But the motor gets extremely hot. Last time I ran it I could smell it starting to burn. The out runner relies on lots of air to keep cool. Unfortunately the water cooled motor mount doesn't do much good, and the air flow through the hull is minimal at best. Eventually I will upgrade.

[Finest Racing]

I had to make a front mount for the motor. I reused the sides. I bought the aluminum flat stock at Lowes. Installing the screws are tedious. You will need patience. It is a very tight fit but will work. After I cut the aluminum, I drilled the four holes - one in each corner to secure it to the side mounts. Then drill the holes for the screws to secure the motor to the mount.

[forescott]

Yeah, it would have been nice if they left the rail spacing @ 5" like the gas versions. I have the 56" P-1 converted. It has 5" rails and there is tons of room.

[Bri6672]

Sounds good, but you won't be able to use the stock motor mount with that motor. Once you put a jacket on it it will be too wide for the mount. I would think the leopard would gain you a little speed being that it is probably more efficient than the stock outrunner, but you may be pushing the limits of that 180 amp esc. I did run a leopard 5692 1340kv on 6s with the t-180 esc with success. But that was in a 45-inch hull.

Well on 6s the 1090 leopard should be fine with the 180amp ESC.... I have heard the stock set up is pulling 110-120 so even if it went up 10-20 amps it would still have headroom!

Does anyone have any real world expierence with the 1090 in this boat on just 6s??

[Bri6672]

I had to make a front mount for the motor. I reused the sides. I bought the aluminum flat stock at Lowes. Installing the screws are tedious. You will need patience. It is a very tight fit but will work. After I cut the aluminum, I drilled the four holes - one in each corner to secure it to the side mounts. Then drill the holes for the screws to secure the motor to the mount.

That was how I was going to do it. Where did you get the coupler and what size is it??

[Doby]

Show us some pics/ vids...come on guys...some us are frozen in for the next few months....throw us a bone!