31" challanger offshore build... very unuasual power

[skidooguymxz550]

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well i'm starting my first real build. after some deliberation i decided to go with the challenger hull and speedmaster hardware (thankyou moppie)

-14 ib4200's
-novak hvmaxx
-speedmaster hardware
-full plumbing
-real offshore looks (planing on either a SCARAB or cigeratte)

[skidooguymxz550]

the esc cooling plate. go to do something for the land lovvin esc

[Fluid]

I'm afraid that you may be very dissappointed with your setup. That 3100 Kv motor is far too much for 14 cells, especially in such a large boat. You would have to use a tiny prop, and even then you would overheat the motor, ESC and cells.

The Novak is designed for a gearbox, and if you used one it would work fine. But it as insufficuent torque for direct drive in a 31" boat that will weigh ~5 pounds. I'd suggest that you either trade for a more appropriate motor, or get a gear drive. Sorry for the reality check....


.

[skidooguymxz550]

damn!! you think something for monster trucks could push a boat. i thought it was 4400kv?

[hkusp45]

KV is too high like fluid stated. I would have to run a turbo trans or somthing to gear it down..

[part time]

the novaks were not very good in the trucks compared to the hackers and feigaos. sell that hv maxx and get a feigao and a castle controller.

[hkusp45]

the novaks were not very good in the trucks compared to the hackers and feigaos. sell that hv maxx and get a feigao and a castle controller.

Good advise!

[skidooguymxz550]

with the diferrent motor and controller will i get the same speed on land? i broke into the 70's with my tc4 on the maxx

i've already put more money into this than i wanted. it seems like i'd have to spend another 70$ after i sell my novak. how is the aquacraft controller, or system?

[saleens7]

70mph with a 31" vee....

you would never be able to control it, i would be afraid to take that boat over 45mph.....boats arent like cars, and water is completely different than pavement....and a vee that size isnt mean to get up to those speeds, it will be uncontrolable and probably flip or spin out before it even gets close to those speeds. and 70mph on a boat is a whole different world that 70mph on land..if you want those speeds, you will need a boat of an entirely different design...

someone is selling a 3 pointer that will do 70mph on another forum

http://www.rumrunnerracing.com/fefor...ad.php?t=22146

there is also a vid too....the price hes selling it at is a bargain compared to the setup you would have to buy to get this vee even close to 70mph...

[saleens7]

with the diferrent motor and controller will i get the same speed on land? i broke into the 70's with my tc4 on the maxx

i've already put more money into this than i wanted. it seems like i'd have to spend another 70$ after i sell my novak. how is the aquacraft controller, or system?

the aquacraft system might work...although it think a 9xl on 14 cells would be a little better...it would still push it pretty fast (nowhere close to 70 though)

[skidooguymxz550]

70mph with a 31" vee....

you would never be able to control it, i would be afraid to take that boat over 45mph.....boats arent like cars, and water is completely different than pavement....and a vee that size isnt mean to get up to those speeds, it will be uncontrolable and probably flip or spin out before it even gets close to those speeds. and 70mph on a boat is a whole different world that 70mph on land..if you want those speeds, you will need a boat of an entirely different design...

someone is selling a 3 pointer that will do 70mph on another forum

http://www.rumrunnerracing.com/fefor...ad.php?t=22146

there is also a vid too....the price hes selling it at is a bargain compared to the setup you would have to buy to get this vee even close to 70mph...

we're on a whole differnt chapter. i want to know if the marine setups could give me similar speeds on land. i want 35-42mph on water

no not the vee silly:rolleyes: 70mph+ with the tc4 on land is what i did with the hv. is the supervee controller any good? how would she doo with them fieagos?

[saleens7]

not good with feigaos....the SV esc is for 6 pole motors, the feigaos are 2 pole if i remember....quicksilver already tried the SV esc with a feigao and it didnt work...

oh...i got mixed up with the marine setups on land...yeah theyll probably get you similar speeds...

[part time]

Steven said he was waiting on some pulso boat controllers one of those should cut your cost down. he has not said what they would be selling for but i have seen the 70 amp for $80 elsewhere. also someone said they ran a feigao on the sv controller but i dont remember what one.

[ED66677]

If you're really short money, the cheapest you can get is Mystery 80Amp ESC on Ebay!... and a Feigao of course!

[skidooguymxz550]

If you're really short money, the cheapest you can get is Mystery 80Amp ESC on Ebay!... and a Feigao of course!

those don't look to bad but i'm guessing the old you get what you pay for adage applys?

[skidooguymxz550]

i also have a mamba maxx xontroller. would that be any good in a marine application?

[part time]

that would be alot better the hv maxx. just make sure u protect it from water and water cool it. then add a feigao from the ose store. this might even work to cool it http://www.offshoreelectrics.com/pro...OSE-cool-plate just shrink wrap it to the top of the heatsinks.

[skidooguymxz550]

that would be alot better the hv maxx. just make sure u protect it from water and water cool it. then add a feigao from the ose store. this might even work to cool it http://www.offshoreelectrics.com/pro...OSE-cool-plate just shrink wrap it to the top of the heatsinks.

ok cool!!! i think the mamba is already water proof. put it in a 4wd for some hardcore mud and snow and she was fine. what motor should i get?

[saleens7]

probably a 9xl...how many cells are you running? how many cells can the esc take?

id probably go for 14 cells with the 9xl..or 12 cells and an 8xl

[hkusp45]

http://206.206.85.209/xtdoc/Details....4&store=mhzusa

We have used these with great sucess on the momba max speed controls.

[Jeepers]

what these guys are telling you for this boat is that you need some" motor mass" in that big boat! pics from left to right, 05 20 turn motor, Nemisis 8L, Nemisis 8XL, Neu 1521 1.5d. I use the black motor in my 30"mono,IMO you need a minium of an XL size motor (3rd from left) to move that boat with out damaging the motor with heat. if your wanting to use these motors on land in a car remember that these motors have 5mm shafts, compared to a novaks 1/8 (3.2mm) so pinion gears can be hard to come by, and the lenghts of the motors may not fit into some cars.

[skidooguymxz550]

well, it appears i'm going to save and get a good marine esc and motor. so far my dads funded about 75% of this project (i do all the work) and he wants to use the hvmaxx do to price. i've passed the info along to him that you gave me and he still wants to use it. it should go into thermo mode before she frys right?

on a happier note i'm almosts finished. i lowered the motor mount a good 1/2" and angled it. i invested in a blow torch and got the shaft done up nice. all i need to do is mount a servo and wire her up.


what do ya'll reccomend to seal up the transom? just clear below the waterline silicone?


jeepers, i didn't think about the pinion thing i guess i'll have to get a fieago and barracuda and keep the novak....oh darn:rolleyes:

[part time]

put the hv maxx on some of the car forums and sell it to fund the other one.

[Jeepers]

I understand what your dad is thinking but tell him that he will be spending alot more once you burn up that hvmaxx. I would sell it or keep it for your cars, but if you have to keep it, your other option would be to buy a smaller hull a BBY oval master 21" inch hull would probably work nice on that motor and you could use a 6-7 cell pack. that motor is just not a good choice for a large hull. what" FLUID " and others have told you is correct. you would be destroying a good motor for no reason.
I am building a BBY Scat Cat 26 for my Dad he also wants to go cheap so DO what i do tell him you need some money for accesories and then use it to buy the good stuff, of course this results in my dad wondering why his boat isnt done yet! (3months of build time and no finish in site yet):D yeah yeah I know thats MEAN:D

[skidooguymxz550]

yeah, x'n the hull ain't happinin. i'm just going to have to buy the system myself . i'm not letting the motor burn. it's just to cool in tc's and st's. besides i need it to power my sandrail gas for my v-10 will take a back seat:rolleyes:

my dads a little less cheap. he's willing to spend he just trys to find a way to skimp and then things brake. not to be an arrogant little ass but our real boat cost 100,000$ paid in cash so i can't figure out why he won't spend 100$ extra on rc. i want to buy the system so it's more equal shares in the ownership

[Jeepers]

yeah, x'n the hull ain't happinin. i'm just going to have to buy the system myself . i'm not letting the motor burn. it's just to cool in tc's and st's. besides i need it to power my sandrail gas for my v-10 will take a back seat:rolleyes:

my dads a little less cheap. he's willing to spend he just trys to find a way to skimp and then things brake. not to be an arrogant little ass but our real boat cost 100,000$ paid in cash so i can't figure out why he won't spend 100$ extra on rc. i want to buy the system so it's more equal shares in the ownership

my dads the same way I cant figure out why he wants to do it wrong instead of right! spending less money in the long run sounds better to me.

[ED66677]

skidooguymxz550... did your dad read all this thread?
this might be the time for him to understand!
look around get the information on different configuration, may some of us give you their exact configuration for some equivalent hull?
my boat:
36" Xcyclone (Kyosho Blue Streak copy)
Feigao 8XL
Mystery 80A ESC
12 cells
K42 prop

previous setup was 2x600 Race and K36/39 prop under 9 cell, I was pulling 3 times the nominal wattage, 300 per motor instead of 112, that's 600Watts total, and at this point efficiency was probably around 40 to 50%, now the Feigao pulls 900-1000 watts, speed is twice as with the 600's so this means efficiency is much higher

see this example, I started with 600's, 80amp brushed esc, GP2200 loose cells, did few runs, almost burn a 600, finaly had to purchase the 8XL, better batteries, hopefully the BL ESC didn't cost me more than 30$

and even this configuration has a mistake, a 10 or 12XL motor would be more appropriate for a 36" hull, so that's next step

what I'm trying to say here is I've started FE boat 6 or 7 month ago with almost no idea, try this, thry that, spend money here, start over from scratch, without even knowing that somewhere (on the OSE forum) there was many guys who have the answers to almost every single question I had, some very good guidelines were given on "Ideas on Building a Reliable BL System by ReddyWatts" thread, STICK TO IT, and it'll work better than you can imagine!

[skidooguymxz550]

thanks guys for all the responses. i showed my dad the thread and he still want's to see what will happen.

last night i got her out on the water with a crap 19t car motor and 6 cells. it actually planed and ran around for about ten minutes. the speed master harware is the greatest. adgusting the trim by turning one screw is sweet.


with this setup there was smoke (or steam) coming out each time i took the cover off but i didn't have water cooling.

i'll be testing it this weekend with the novak

[part time]

good luck with the novak. if it fries make him buy u what u want. and dont forget to check after the first minute for temps.

[ED66677]

was it smoke or steam, steam almost doesn't smell, but smoke, if it came out of the motor or esc, must have that particular smell of burnt electronics???

I can tell you what your dad will see happening, more smoke and nothing else!