which motor?

[iceman]

i have narrowed my choice of motor down to two...the leopard 4074 2200kv or the keda 4074 2364kv. which one is the best choice for my 24 in. rigger? boat should be just a hair over 3lbs. thanks for all the help.

GARY

[wilsta67]

what about a cc1515 2200kv - 2650kv




http://www.ebay.com.au/itm/Castle-Creations-1515-1Y-1-8-Brushless-Motor-2650kV-/230646972321?pt=Radio_Control_Parts_Accessories&hash=item35b3a17fa1#ht_2032wt_954


http://www.ebay.com.au/itm/Castle-Creation-Mamba-Monster-2650kv-Brushless-Motor-/370539768844?pt=Radio_Control_Parts_Accessories&hash=item5645e42c0c#ht_3096wt_1032


http://www.offshoreelectrics.com/proddetail.php?prod=ham-castle1515


http://www.ebay.com.au/itm/Castle-Creations-2200kV-Rotor-Replacement-Kit-/360376465621?pt=Radio_Control_Parts_Accessories&hash=item53e81c78d5

[iceman]

Wilsta, that motor is too rich for me. im a poor country boy

[wilsta67]

there not that much dearer if you look in the rite place
what's a leopard motor cost?

also what battery packs and esc you plan too run???

[iceman]

the Leopard is 95.00. running 4s.30c not sure what esc to use yet

[wilsta67]

the Leopard is 95.00. running 4s.30c not sure what esc to use yet

both those motors will be fine on those packs but you will need at least 180amp esc the turnigy or seaking are well known

http://www.hobbyking.com/hobbyking/store/__8937__Turnigy_Marine_180A_Brushless_Boat_ESC.htm l

http://www.offshoreelectrics.com/proddetail.php?prod=ker-seaking-180

or there is these 200amp i havent had anything to do with this type but it should be ok


http://www.offshoreelectrics.com/proddetail.php?prod=hef-sword-200lv

http://www.hobbyking.com/hobbyking/store/__15134__Hobbyking_SS_Boat_Series_200A_ESC.html

[Chilli]

What is the height and width of your tub?? The gear you guys are talking about would probably be more suited to a 30+ inch rigger.

[martin]

I also think a 4074 motor is to much for a 24" rigger.

[siberianhusky]

Wow I was thinking about converting my 24" JAE 12 to electric, was planning 2s and a 28 mm diameter motor. I'm having an interesting time trying to get stuff laid out while getting the CG right, How are you doing it with you're rigger?
IMO that's about twice the motor you need for a rigger that small. The 4s may also not be a good idea depending on the size of the cells you can fit in there. be very short runtimes, also need to be sure what packs you choose can supply the current a 4074 will draw.
Most people running motors of that size are running two 4s2p 8 - 10000mah setups.
The JAE 21 rigger is quite a bit bigger than yours and is very fast on spec 36mm motors, and is able to utilize a single 5000mah pack.
Not saying bit can't be done if the boat was designed for it from the start, but most riggers of that size are running 2s setups.

[wilsta67]

hehe know that old saying, "go big or go home" :tiphat:

[Chilli]

Well if you ever build a similar set up William, post some pics and let us know how it turns out.

[Boaterguy]

both those motors will be fine on those packs but you will need at least 180amp esc the turnigy or seaking are well known

http://www.hobbyking.com/hobbyking/store/__8937__Turnigy_Marine_180A_Brushless_Boat_ESC.htm l

http://www.offshoreelectrics.com/proddetail.php?prod=ker-seaking-180

or there is these 200amp i havent had anything to do with this type but it should be ok


http://www.offshoreelectrics.com/proddetail.php?prod=hef-sword-200lv

http://www.hobbyking.com/hobbyking/store/__15134__Hobbyking_SS_Boat_Series_200A_ESC.html
those SS's are paperweights at best, blew three of them drawing 150A or so for a 45 second run

[iceman]

The tub is 2 1/2 tall, 3 1/2 wide,and 24 long. ...sponsons are 1 3/4 wide by 10 1/2 long.......there are two rear sponsons that are 3/4 high by 3 in. long
maybe this will help. i want this to run in the 55 to 60 range

GARY

[martin]

Ive got a 17" JAE mini sprint that runs mid 50s mph with a $12 450 outrunner motor on 3s, A 540 size motor on 4s in a 20" boat should get you 55-60 quite easily.

[siberianhusky]

I just set a Castle 1512 in my 24" rigger and a pair of 2s packs to simulate a 4s pack and well good luck with that! And the 4074 is a much bigger motor.
Pretty much taking a sledge hammer to a finishing nail here. A UL-1 motor would over power that size a rigger and do it with a 60$ esc! Give you good 4+ minute runs with a 5000mah 35c pack. Thats actually exactly what you're supposed to run in a JAE21fe and it'll easily do 55.
All this is assuming the design of the boat is actually capable of handling even spec power, what plans did you use? Some of the older designs are not the best with modern lipo batteries and brushless motors. They usually need a few changes to the angles in the sponsons.

[iceman]

my sponsons are a copy of the jae21fe but the tub is wider and deeper. wanted more room for motor and batt. pack

[Fluid]

hehe know that old saying, "go big or go home"That is really too small of a boat for that kind of Leopard power. I don't mean to be overly harsh, but I just do not understand why newbies think they can re-invent the wheel. The OP has received some very good advice from experienced boaters (and some bad advice from other less-experienced newbies) in this thread - but he refuses to listen. The stock 31" JAE21 runs 55+ with the UL-1 motor and ESC, but the OP changes it around and expects it to run well? Right. That hull underwent a lot of R&D by some of the most experienced R/C racers in the world. But toss all that knowledge out. Change the tub, modify the aoa on the sponsons, use two rear shoes....it isn't the same boat and there is no guarantee it will work well.

But then the OP has probably never seen a good running rigger anyway, so hopefully he will be happy with his boat. He'd be happier if he followed the advice of experienced boaters, but you know that old country boy saying - "you can lead a horse to water but you can't make him drink...." :wink:


.

[kievyu]

try 3674 or 4065 size motor kv2500 ~ 3000 for 4s !

What esc depends on what propeller ... if use 437 or 440 propeller just 120a esc ok,

Sorry my English is too bad ...

[iceman]

Fluid, you had suggested the fiegao 8s which is a 540 motor so i was looking alone these lines thinking 540. if i need a smaller motor then thats fine i just want enough power so i dont have to buy thice

[iceman]

Fluid, you had suggested the fiegao 8s which is a 540 motor so i was looking alone these lines thinking 540. if i need a smaller motor then thats fine i just want enough power so i dont have to buy twice.............Would a Leopard 3674 with 2650kv be a better choice? what prop would i start with?

GARY

[siberianhusky]

SO you took JAE21 sized sponsons and stuck them on a 12 sized hull just a bit wider so you say? I'm sorry but I just can't see how you are going to get that set up anywhere near properly regardless of what power you throw at it. You've set yourself quite the task best of luck.BTW don't run a 2500-3000kv 3674 or 4065 motor in this on 4s, that just dumb! If you're bound and determined to run 4s just stick a UL-1 motor in it with a t-120 esc and start out with an x440 prop, the motor will handle a lot more prop but I'm not so sure of the hull design! You'll have the perfect setup to move over to a JAE 21fe then and definitely hit your 55 mph with a different prop.

[wilsta67]

Well if you ever build a similar set up William, post some pics and let us know how it turns out.
lighten up Mike it was a bit of Aussie :sarcasm1:
:brownnoser:

[Chilli]

It's all good. :tt2:

[iceman]

man im confused. went frome the 540 motors to a UL-1 (whatever that is) guess i will figure it all out and get it going sooner or later.

GARY

[martin]

The UL1 motor is out of the Aquacraft UL1 hydro, Its a 3656-2030kv which is a pretty good motor that a lot use ecspecially popular in the JAE 21fe hydro that is 31.5" long.

[iceman]

guess thats the way to go. so i can run this on 4s? do i need a 120 amp esc? X440 prop? so ill be looking for a 440 motor mount then right?
like this one?

GARY59879

[Boaterguy]

a 36 mm motor is 540 sized if i'm right.
a 120A esc might be a little overkill, but still a good choice in case you upgrade.
x440 sounds pretty good, although I've never run one of these motors

[iceman]

what about this combo from OSE?

GARY59880

[Boaterguy]

looks pretty good, i'm not downplaying the 120A esc at all, in case you ever get wrid of thsi build and hold on to the ESC, but if that is cheaper then i'd say go for it.

[iceman]

so if the UL-1 motor is a 540 then whats the differance in that 540 and a leopard 540 size motor like the 3674?

GARY

[de-pro]

Longer can and the rotor. UL-1 draws less amps than the Leopard so you can use cheaper ESC's with the UL-1 motor

[iceman]

so why not use the better motor if its the same size other then a little longer? if the motor is a more powerful one wouldnt you be able to run less throttle and therefore less hea and longer life? its that way in rc cars maybe its not the same but just thinking.

GARY

[de-pro]

I'm new to boating but certainly not new to brushless setups. Longer can motors produce more torque but for the price of drawing more amps. You can use the UL-1 motor with any esc around 60-80 amps range but you cant use the 74mm can in anything less than 120 amps. Also UL-1 motor is rated for 4 or 5 cells lipo when Leopard can handle 6. So if you have the money then buy the Leopard and a 120+ amps esc.
One thing you have to keep in mind is the size and the application of the boat. Too much power is not a good thing if the boat cant handle it. Just a waste of money.

[Boaterguy]

running lower throttles does not draw less amps or use less power, if anything it is more abusive on the ESC