31" challanger offshore build... very unuasual power

[skidooguymxz550]

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.

he's not gonna be happy i think



ed- there was no smell so i think it was steam.

[ED66677]

if it's steam this means :
-water is coming in the hull, leakage somewhere?
-water is touching hot surface, ESC or motor? both won't like it!!!

I'm afraid steam will turn into smoke soon!

[skidooguymxz550]

if it's steam this means :
-water is coming in the hull, leakage somewhere?
-water is touching hot surface, ESC or motor? both won't like it!!!

I'm afraid steam will turn into smoke soon!

the water isn't no biggy. i didn't have the hatch on real well and i used reverse to avoid weeds. i know reverse is a big no no. do the barracuda esc's have reverse?

thanks for the concern

[skidooguymxz550]

WELL........................... SHE LIVES!!!!! this boat is beothcyen!!!

first, everything got aboout hottub warm. not bad at all. i'm running a 40mm prop

performance, insanely fast with great mid range torque. at 3/4 throttle she starts chine walking and when you crank it up to full it skips till it blows over luckily the landing was good.

probally about a 40mph boat

i'm already trimmed down so should i put on tabs?


my dad likes it so much he wants to fund a big cat to live out offshore racing dreams in small scale:D


this is the first hi performance thing that has lasted a whole run that i've evermade:rolleyes:

[ED66677]

where's the Center of Gravity (COG), if she blows over everytime this might need to be adjusted? move batteries on the front, 1" at a time...
that's just an idea!

[skidooguymxz550]

cool, thanks!!!!:) this boat makes me very happy. i'll grab a vid of it today

[Jeepers]

GREAT! cant wait to see the vid!

how long did you run it for? and how many cells?

[skidooguymxz550]

well, i put it in the water this mornign to run it. the steering worked but i hit the throttle and nothing. i brought it in and opened it up and smelt burnt electronics. me and my dad cracked open the speedo (source of smell) and found a row of corroded board and chips and several burnt ones. we figure water got in via the cooling system.

it ran fast for about 4 minutes on 12 cells.

but the electronics temps were fine. luke to hottub warm for everything. after a run you can keep your finger on everthing

[skidooguymxz550]

well i want to run it this weekend so i'm outfitting with my mamba.
i also took some pics of my complete interioir. i lowered the motor mount since the first pics.


i also taped on some paper to get an idea for graphics.
wadda think?

the blue is purple. the camera is just crap

[hammertime]

first gwet a better cooling jacket for the motor.......also what mamba is that......wich kv

[skidooguymxz550]

i decided i'm not gonna run it. i'll just wait for the hv to comeback. the kv is 7700

wadda ya think about the graphics?

[SJFE]

The alinment looks good. I am worried about the motor. IMO is is a little small for the package. I would go with a feigao XL. be sure and only run it for about 30 seconds before cheking your temps.

[LJH]

I personally do not think the 7700 will be long for this world in that boat. 7700KV is extremely high wind. you will have to turn a VERY small prop on a low cell count for the motor to be happy. I don't want to be a na-sayer but I also don't want to see you blow anything up.

Cheers,
Jim

[skidooguymxz550]

thanks. i decided not to use. i decided i'd just wait for my big motor to come back. no comments on the graphics?

[ED66677]

in this thread you'll see that your hull needs a 12XL that can pull 55amps max (Feigao specs), if you go for 16 cells (almost 20V) you'll pull more than 1000watts, a 700 can handle 500-600max, so that's half! choice is made!

[skidooguymxz550]

big update time!!!! i got the motor back so she was running again. i also got a video of it that i'll upload on monday when i get home.

this morning i ran it and she was running great...... till it blew up!!!! yes blew up!!! i was about 4 minutes into the run and i heard a boom and the hatch blew off (little tape held it on) when i brought it in a battery had blown up. i found it odd becuase the other electronics and batts were at a normal temp... what would cause that?

heres the cool part, its on video:D

[ED66677]

I would say a bad cell! or you simply pulled more than bat can handle!

[Jeepers]

quit teasing us by telling us about it, put the video on!!!!!!!!!!!!:D

[skidooguymxz550]

i will monday. i'm up north right now and our computer here is runnin at 24k and i don't have the camera software on it.

[skidooguymxz550]

my blow up video and pics don't want to upload. kodak easyshare sucks!!! heres the running vid... she goes alot faster in calm water and disreagard everything stupid me and my family says

<object width="425" height="350"> <param name="movie" value="http://www.youtube.com/v/_fomgOdMKKU"> </param> <embed src="http://www.youtube.com/v/_fomgOdMKKU" type="application/x-shockwave-flash" width="425" height="350"> </embed> </object>

[saleens7]

..................

[skidooguymxz550]

here it is

http://www.youtube.com/watch?v=_fomgOdMKKU

[Jeepers]

what no explosion! whats the deal?:D

[skidooguymxz550]

what no explosion! whats the deal?:D

kodass easy share sucks nuts!!! i've tried uploading 4 times getting a few more pics each time. theres 204 pics on the card so it takes forever and errors out. it drives me nuts

[saleens7]

....................

[skidooguymxz550]

yes. my moms a terrible camera person. i told her keep it on the boat

[Old Sloppy]

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

Did you know 40 mph on the water = 100 mph on land ?

I learned this at a professional boat race many, many years ago.

so 70 mph on land = 28 mph on the water.

Harry S.

[ReddyWatts]

Harry can you explain that a little deeper by telling how to you came up with that calculation?

[FE_Chris]

I just got done reading this thread, nice looking boat. So you are running the HV-maxx without problems? I never got to see which HV-maxx it was. The original 4400kv motor or one of the new ones. I wanted to install one of mine in a boat, but I sold them cause I never thaught they would perform cause of the high RPM.

Also, I have a mamba maxx 5700 combo, I thaught about putting that in something small like a bby 21", or a small fuller hull. Still not sure if the KV is to high or not...IMO.

The video looks good, that thing flies! needs some trimming though ;-)

[skidooguymxz550]

no problems at all except one fried because it got wet. they are pretty hot to the touch after a run but it was the same deal in cars. yes it is the 4400

thanks for the boat compliments. she goes pretty good in the vid but she goes to the point were she'll blow over in calm water