Hi!

I have recently installed a brushlesss system in my Aquacraft Reef Racer 2. The motor is 2700 kv, and the battery is 3-cell li-po.

It went ok until the half throttle, but over the half throttle, it spins out to the right hand side or flips over.

Thus, I added some weight in the back of the boat, making it sit deeper in the water. Also I shortened the water pick-up from 5 mm to 2 mm to reduce lifting-up effect by the water pick-up.

Now the boat runs ok until 80% of the throttle, but over 80% of the throttle, it begins to badly “ROCK”, and at the full throttle, it spins out or flips over.

I would like to hear good advices from experienced boaters to solve this problem. I am now frustrated.

Thank you for your attention!

Obviously overpowered. Put the brushed motor back in. Or use 2 cell lipo

i agree, to much power and the torque steer's kicking it over,  try 2s

try a smaller prop, never such a thing as to much power in a boat..
also make sure the rudder and strut are set correct

Thank you guys for your responses!

The water pick-up of this boat is not on the center-line. It locates a little off from the cneter-line on the left hand side.

If removing this water pick-up, and installing a new water pick-up in the center-line of the hull, does this help?

Thank you again!

not really going to help only if it gets more water but at the same time you don't want to cause more drag..

I don't know the anatimy of the reef racer but I think he might be talking about the rudder.

i've had a look at the RR 2 and the prop and rudder are below the boat, could you post some photo's so we know exactly what your talking about please

I also put the brushless motor and 3S pack and copper prop plus universal joint. This is definitely over powered but if you play around with the battery position, it will keep going straight but only for a while.
I ran it in circle and manage to dive it almost at will. The water got inside somehow, so I decided to put an auto-bailer....wrong moves because either the angle was not correct or the one way valve (bb and o-ring) got stuck. It sank and I had to dive in to retrieve it. Later it sank again but it is 40 degree! I had to let it go.
6 months later, I lost a hatch of my other Cat because of the somersault and I decided to dive in...and I found my BL RR2.
I took it home and cleaned it up with plenty of Corrosion X and let it fan dried overnight. The motor, the RX and the esc are still working! I only had to replaced the rudder servo.
I coated those with water proof 3M epoxy DP-270 of course.

http://s7.photobucket.com/albums/y27...P1070637AL.flv

Hi, guys!

I tried to post some pictures of my RR 2, but after trying uploading, a sign appears, saying, "This website cannot disply." And it says, "This website has internal server problem."

I don't know what is wrong. Any ideas?

Thanks!

Here are the pictures! This time, it seems to work.

Thanks!

The first picture is not clear. Here is another one!

Your advice will be appreciated! Thanks!