King Of Shaves C1 Brushless!

[Drag Boat Bob]

Well, the maiden voyage of my new EKOS was disappointing. At first things appeared ok. Turning was sharp without any roll. I made a couple of WOT passes and she looked like the low thirties in mph (GPS indicated 33.9 mph on 3S).

All of a sudden she would not turn to the right. I finally got her back by making short bursts of throttle and full right rudder.

When I opened her up the infamous smoke billowed up. Thinking an electrical short of some kind I quickly disconnected the batteries. I then noticed that the insulation on all three port side motor leads had melted away (about an inch long). I took the temp at 171 degrees. I’m sure it was a lot hotter earlier, as I had a long walk back from the lake.

Calls to Venom went to voice mail (twice)…

Guess I am back to running the UL-1…

[6S HYDRO]

ugh thats not good. i remember trying to contact venom on their charger usb computer connection and they never returned my call

[NitroVal]

Thats been my biggest concern.. Even though my motors and ESCs are warm, the motor wires are always HOT.. Im thinking they either used some crap low grade high resistance chinese wire, or its just the wrong gauge

[nomobux]

Gawd. Don't wanna hear that. I'm still waiting for batts. Keep us updated please. I was a liitle worried getting this, considering the time frame ( winters is coming fast ) and this being the 1st run. I hope Venom takes this into consideration and takes care of us early guys. Venom .. you out there and reading these posts ?

[Drag Boat Bob]

Venom update...

I posted my tale of woe on ('''different site''') as well as here and it was picked up by 'Venom Media'. Within an hour I received a call from a Venom rep. He was both courteous and understanding. They are allowing me to send in the motor instead of the whole boat (Thanks again Venom).

Let me say that you need very small hands to remove the motor. I am sure that it will be a challenge to install the new one.

Once the motor was removed I found that the water jacket appears to be a restrictive component. Blowing into the other lines became much easier once the motor (and water jacket) was eliminated from the stream.

I did notice during my pre launch check that the port side water line was harder to blow through than the starboard side, but air did flow.

On the good side, the bolts into the motor through the mounts are both larger in diameter and 3 times as long as the ones on the UL-1.

I will post pics when I get off of this 14.4k dialup.

[6S HYDRO]

you should have just sent a picture of the damage and had them send out a new motor today. then by the time you get the motor out it will be there. they know these boats are brand new c'mon

[Drag Boat Bob]

They actually are trying to get another motor to me before I leave this cabin. I will know tomorrow if they were able to ship one. If they don't send it by tomorrow then they will have to send it to my home as I am leaving in a week.

Let's wait and see...

[NitroVal]

Thats good they took care of you. Its smart they know the amount of internet attention this boat is getting could hamper the sales of their next batch..
I took my motors out and it was a bitch to get out. I was thinking of getting that "L" shaped tool OSE sells. One thing I should have mentioned when I got my EKOS was the port motor outlet hose was kinked. I had to reroute the hose in order to fix it..
But mine runs like a bat out of hell. I managed a new top speed today of 45.1 on the same exact setup. I think there is still more in with a little bit better "refinement" of the props and drive angle (seems to be riding a little nose high), and when I can remember my temp gun, I may try to bump the timing up a bit.. Gonna see if this thing will do 50mph with 3S. I think I may try to utilize the the water port on the rudder. Perhaps for some battery cooling or making it the supply for the motors to help keep them a bit cooler

[Drag Boat Bob]

NitroVal,

Did you notice that the motor mounts have two threaded holes in the top? I believe these are the water jacketed type. I used a small tube to blow into one and it came out the other. All you need is a couple of hose fittings for each motor.

[NitroVal]

I was curious what those were. I thought they were just mounting holes. Good observation. I wonder why Venom put so many unused cooling options on this boat..

[NitroVal]

D'oh
(watch till the end)

http://www.youtube.com/watch?v=Rz_feW7scWU

New tops speed, 46.9mph
Still on 3S 20C's

[Brushless55]

Yup, it say only 3S batteries.
I ran again today with the x442 props. Pretty impressive, 8.6mph gain. New best 43.6mph with nothing but props. They may be a little big though. I think the amp draw would be excessive with 4S batteries. The motors and ESC were warm, but the motor wires were hot. Im gonna run again tomorrow and take my temp gun to make sure. Anyone know how hot is too hot?
This helps my decide that the OSE calculator is pretty dead on, even though its for single motors and this boat runs dual motors. The calculator put my top speed at 42mph

Do you have a shot of a gps with your mph?

[NitroVal]

I think its still saved on my GPS, but no, not one with the GPS in the boat. I can take one tomorrow though..

[NitroVal]

[6S HYDRO]

what are you using to space those 442 props, isnt this boat setup for 4mm