Rio EP brushless conversion HELP??????? plz

[lenny]

Now that is a very very smart man.
I think I would run run and hide !

[JoeOvercoat]

I thought Make-A-Wake recommended that motor, but now I see Make-A-Wake was not refering to either of the linked motors, but a third one. I would go with a motor that draws less wattage, myself. I'm not impressed with the Aquacraft ESC's cooling arrangement, so I would go easy on that ESC. But web sites are not clear to me...as to what voltage they are running their numbers at. If you are trying to balance the ESC & motor, you kind of need to know. I'm sure one of the more experienced members here could help with more specifics.

For reference the stock motor for the Aquacraft ESC in the UL-1 can be seen @ http://www.offshoreelectrics.com/pro...ug7001&cat=115 and @ http://www.activepowersports.com/aqu...-ul1-aqug7001/

[aminoacid]

ok. i put in KD36-60 motor, 60amp esc and 2x2s 5000mah (on on each side). stock everything else including prop.
HORRIBLE torque roll, litterly barreling out of the water and leaning to one side. I tried trim tabs nothing helped. seems boat is too heavy in the water too. Any ideas?
check out the video.
VIDEO

the boat leans to the right really bad with just barely increasing the throttle. it'll move ok at very low speed and verrryyy slowing increasing the speed, but at a certain speed no matter how i try it will prop walk or lean.

If i punch it it will roll out of the water full 270 upside down.

I will post pics also. I think the prop is too far in towards the transom i'll have to pull it out a bit and also what size prop should i try ? im running stock now.
I have a sincle 4s lipo that I think i want to try and put on left side of hull.

motor is 2200 kv. I have a 2600kv but haven't tried that yet, my guess it''ll do cart wheel and backflips with that motor.

[Make-a-Wake]

Which motor is it............what kv??? Running 4s??

If my memory is correct i think the stock prop is a 42mm diameter. Wish i knew the kv, but i think you need to go with a smaller diameter prop..............if you have the funds get an x435 and an x438 and try those. Start with the 435.

The boat really doesnt look that bad in the vid...............go easy on yourself!! And remember you went with a very powerful motor!

http://www.offshoreelectrics.com/pro...?prod=oct-x435

http://www.offshoreelectrics.com/pro...?prod=oct-x438

[aminoacid]

sorry, i just updated the kv, 2200Kv to be exact on 4s. the esc i have is from a UL1 superior 60amp and i believe i can only run 4s. 2s won''t work

which motor should I have tried?
this current setup really isn't usable at all, the video does look much better than reality because I was giving maybe 15% throttle. then this thing leans to the right so game over, even at low speeds. I can get it to accelerate extremely slowly but at a certain speed it'll lean then i can't go any faster.

[aminoacid]

.......

[Make-a-Wake]

I wasnt recommending 2s...................but here's the thing, the diameter of the prop is the main culprit in the torque roll. The motor you went with was also larger than i ever recommended but it can be usable. The smaller props will help alot.........heck, maybe even try an x 432........... A smaller prop will lessen the roll and also allow you to air the boat out with full throttle............ESC's dont like partial throttle and will burn up that way. If the props dont work, grab yourself a cheapy esc that you can run 3s with and try it, HKing selld some for like 25 bucks. Dont give up, it looks good.

Lastly, if you find its just too much motor, maybe you have an application for that motor or can use it down the road.............or sell it for about 75% of what you paid for it.

Here are other options:

4s - http://www.hobbyking.com/hobbyking/s...er_1350kv.html

3s - http://www.hobbyking.com/hobbyking/s..._Inrunner.html

[aminoacid]

more video
V I D E O

VIDEOOOOO

[Make-a-Wake]

It may help if you dont "gun it"..............get it slowly up to speed.

[aminoacid]

it wont get up to speed either way. I was only pulling throttle more so you guys can see what its doing. If i slowly get it up to speed it'll lean to one side and prop walk,,,... retarded.

I couldn't get it to a plane as you can see all the videos the hull contacts too much water even towards the front.

[Make-a-Wake]

Your cg should be around 30% from transom.............can you move your batts back???

[aminoacid]

I can move them back about 3 inches excellent point I will try that

[Make-a-Wake]

I can move them back about 3 inches excellent point I will try that

The cg should then be about 6-7 inches from the transom...........you can hold the boat on your fingertips on the bottom and balance it...............or use a broomstick etc.........

Maybe the cg adjustment and smaller prop will settle that beast down!!

Just out of curiosity lemme know where the cg was...........

[lenny]

When you move your lipos,
Move left one 1" to the back more the right one.
That may help with torque roll some,
And mark where they are each time when you move them.
And get some pictures up.

[lenny]

Also, Now you have a lot more power,
So you will need longer turn fins to.
I made my turn fins 1/2"longer and trim tabs 1/4 longer then stock the ones.