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View Full Version : M1 Supercat / KB45 10XL (Sport)



ReddyWatts
10-29-2007, 12:56 PM
I used a 34" M1 Supercat hull with a KB45 10XL (1200kv) motor on 24 cells using an OEMRC HV 100 amp controller. All temps are staying below 110F. CG is 11 inches from the top rear.

kb-45-10xl Kb Brushless Motor 1200kv $69.99
http://www.offshoreelectrics.com/proddetail.php?prod=kb-45

kb-45 water jacket $22.99
[http://www.offshoreelectrics.com/proddetail.php?prod=kb-45-jacket

Octura .150 cable system for 3/16" props $24.99
http://www.offshoreelectrics.com/proddetail.php?prod=ose-svcable&cat=70

OSE DR Motor Mount 500, 600, 700 & Feigao Motors $7.49
http://www.offshoreelectrics.com/proddetail.php?prod=ose-drmount

Straight coupler 6mm to .150 $9.95
http://www.offshoreelectrics.com/proddetail.php?prod=ose-str-ci

Hitec FM Radio System $76.99
http://www.offshoreelectrics.com/proddetail.php?prod=dh-126751

Antenna Bru Line $5.50
http://www.offshoreelectrics.com/proddetail.php?prod=dh-bruline110
http://www.offshoreelectrics.com/proddetail.php?prod=aero-6030

M-1 Supercat Catamaran hull $321.00
http://www.finedesignrc.com/hullshydromarine.asp

FDM 12 - 24 cell+ all-in-one 21EGSRA Hardware $99.95
http://www.finedesignrc.com/hardware.asp

Prop X640 $14.50
http://www.offshoreelectrics.com/products.php?cat=87

OEMRC Sentilon100A HV 2-12S Speed Controller $99.99
http://www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=6550&Product_Name=TURNIGY_Sentilon100A_HV_2-12S_(USA_Warehouse)

Pistix $13.50
http://www.offshoreelectrics.com/proddetail.php?prod=rch-pistix

OEMRC BESC Programming Card $8.30
https://www.unitedhobbies.com/UNITEDHOBBIES/store/uh_viewItem.asp?idProduct=2169

Batteries 24 -(IB3600 cells are more reliable than the higher capacity cells.)
24- IB3600 6 cell packs for $120.00
http://www.rcstation.com/product_info.php?cPath=81_264_278&products_id=4021&osCsid=14904971ff44882458579195435e6061
http://www.rcstation.com/index.php?cPath=81_264_278
http://www.proboatmodels.com/Products/Default.aspx?ProdID=PRB3313

Video
http://www.rcflix.com/photopost/showphoto.php?photo=2850&cat=500&ppuser=3055



Total = 895.00

Flying Scotsman
10-29-2007, 06:28 PM
Reddy, very interesting. You and I are on the same plain.

My motor will not be as far forward as yours. The other components seem to be identical. My choice for power is 5S or 6S Li-Po and time will tell as far as prop sellection is concerned, but I favour a 640 prior to testing

Steven Vaccaro
10-29-2007, 08:37 PM
Nice job, I happen to like the sticker on that motor :buttrock:

Flying Scotsman
10-29-2007, 09:54 PM
Reddy, very interesting. You and I are on the same plain.

My motor will not be as far forward as yours. The other components seem to be identical. My choice for power is 5S or 6S Li-Po and time will tell as far as prop sellection is concerned, but I favour a 640 prior to testing

Please note that Reddy has been more than helpfull in my set up!!
His knowledge on KB45 motors is fantastic

Douggie

kal1b3r
10-29-2007, 10:24 PM
that boat looks sick, and for some reason, i really like the fact that there is a lot of room on the inside on the boat.

Mich. Maniac
10-29-2007, 11:05 PM
Nice job, I happen to like the sticker on that motor :buttrock:

I do agree. How much do you have to spend to get some? :tongue_smilie:

ReddyWatts
10-29-2007, 11:09 PM
My motor will not be as far forward as yours. The other components seem to be identical. My choice for power is 5S or 6S Li-Po and time will tell as far as prop sellection is concerned, but I favour a 640 prior to testing

I tried a X642, X640, X637, Y537/3, X442, X440, X437/3. The Y537/3 rocks on this motor using 24 nihm cells. I am thrilled with the way it turned out. My lake is getting to small.

IMO, if a motor is not loaded properly for the controllers dynamic timing range, (to much or to little load) it will run hot. With the Y537/3 prop, it is staying under 110F, using a OEMRC controller. Therefore it is loaded within the range the controller was designed.

Is this the way you guys understand it?

10gauge
10-30-2007, 10:56 PM
Great job ReddyWatts on your M-1! I was just curious...
I have an M-1 and a 21EGSRA HW still in its packaging.
How is the 21EGSRA HW on the turns?
How did you reinforce the transom mount area?
How would a KB45-8XL (1700kv) run on 6S?

Congratulations on your M-1... Looks awesome!

ReddyWatts
10-30-2007, 11:18 PM
I am still learning how to turn this hull. It handles different than my Mean Machine, but so far I have not noticed any boat handling issues. It is just my driving since I got it dialed in. It rides on the back pads and flies down the straights and I let off before the turn and then power on through the turn. It really looks cool in the straights.

I used a dremmel and carefully smoothed it a little, then cut to fit a T shaped 1/8 plywood and glued it with epoxy to the transom. It is solid.

Ask SJFE about the 1700kv motor. I think he has run that one.

SJFE
10-30-2007, 11:38 PM
The 8XL ran a little hot in the Jolly around 20 volts. Even with a small k40 prop. I was drawing around 100amps constant with 160 amp spikes. Temps where around 140 on the packs 135 on the esc and almost 130 on the motor. All this on a 34 inch cat @ 8.5 pounds.

sdartt
03-04-2008, 03:35 PM
I just ordered my first FE hull, it's a M-1 like yours with the exception it is red, I am a lousey painter. You parts list looks great, OK if I copy you?
Thanks again for all the work you did with part numbers, web address's and your time.

Fluid
03-04-2008, 06:19 PM
....It rides on the back pads and flies down the straights and I let off before the turn and then power on through the turn. It really looks cool in the straights....

One thing you can try is to angle the rudder pivot back. Place the hull on a flat table at its ride attitude and look at the rudder pivot from the side. If you angle the pivot with the lower end further away from the transom than the top end, this will cause the bow to drop when you turn. This can help to plant a cat in the corners without having to chop the throttle. However on some hulls you just have to use the throttle....


.

ReddyWatts
03-09-2008, 05:54 PM
Thanks Fluid for the cat cornering setup tip.

I have changed to a different HV sport controller. This one has two heat sinks, one on each side. I have added two 12 volt fans wired in SERIES for the 28.8 volt setup. Cut some cooling exhaust slots in the controller heat shrink. Used metal screws to hold the fans on the sinks. Wired it directly to the controller battery leads. It only has a black and red lead coming from the motor. I like the idea that it continues to cool until you pull the battery leads when you get it back on the bench. They only draw 10 milliamps each and run very quite. This was a very easy mod.





http://www.coolerguys.com/840556021834.html

.

10gauge
03-10-2008, 11:34 PM
ReddyWatts, what was wrong with the previous ESC? Were you having heat issues? I have a OEMRC 100A HV ESC too, and was curious why the switch?...

Thanks

ReddyWatts
03-11-2008, 12:38 AM
One of the Fets died in the OEMRC for no reason, so thought I would try something different. Everything was running cool with good margins.

bustitup
03-02-2009, 11:43 PM
I tried a X642, X640, X637, Y537/3, X442, X440, X437/3. The Y537/3 rocks on this motor using 24 nihm cells. I am thrilled with the way it turned out. My lake is getting to small.

IMO, if a motor is not loaded properly for the controllers dynamic timing range, (to much or to little load) it will run hot. With the Y537/3 prop, it is staying under 110F, using a OEMRC controller. Therefore it is loaded within the range the controller was designed.

Is this the way you guys understand it?


what was the speed on this setup?

ReddyWatts
03-02-2009, 11:52 PM
50 mph on the 537/3

Eyekandyboats
03-03-2009, 07:32 AM
Hey Reddy what props does your supercat like?
my small one likes 3 blades but i don't know on the large one.
am i better off to stock up on some 3 blades?

Meniscus
03-03-2009, 10:03 AM
I have added two 12 volt fans wired in SERIES for the 28.8 volt setup...

Where is the cooler air coming from? Or is it circulating the same air?

This may be a silly question, but I'm just seeking clarity.

Thanks.

bustitup
03-03-2009, 10:23 AM
50 mph on the 537/3

a little off subject but how would the kb45 10xl perform in a mean machine on 6s

Jeff Wohlt
03-03-2009, 10:36 AM
It would be using the air in the hull. Also, it is better to pull the air than push it. So for my fan cooled the air is blowing away from the unit and drawing the cooler air into the unit.

Meniscus
03-03-2009, 12:29 PM
A thread heister! LOL, J/K

Bustitup, consider creating a thread for your build ideas, that way you can get lots of feedback and guidance from those that have experience with the product in question. I'm not implying that you don't, but merely saying that no one has experience with everything or every product. That's what the forum is all about ;)

Meniscus
03-03-2009, 12:31 PM
It would be using the air in the hull. Also, it is better to pull the air than push it. So for my fan cooled the air is blowing away from the unit and drawing the cooler air into the unit.

I see. Good call on pulling the air. I don't have much experience with air cooling, that is except for hovercrafts. But in that case, they have cooler air available to them and they aren't enclosed in a hull.

Flying Scotsman
03-03-2009, 12:44 PM
Hey Reddy what props does your supercat like?
my small one likes 3 blades but i don't know on the large one.
am i better off to stock up on some 3 blades?


Taylor, it depends on motor, drivetrain, hardware, power, etc?

Woops, I just posted another silly question!

Edit: Taylor just apoligise on this site and all will be forgiven...up to you?

Douggie

RandyatBBY
03-03-2009, 04:45 PM
Air cooling does work, the efect of the air moving does help evan though it it is all the same air. We air cooled the Astro Flight motors with coumpter fans to keep the comps from exploding. When I was a Jewler we would blow on the stones to cool them and prevent damage. So Yes it will help to air cool!

Meniscus I like your comment on "no one has experience with everything or every product" How true!

Meniscus
03-04-2009, 10:16 AM
Thanks for the info!