Help me with my first build: Delta Force Explorer 36 cat.

[RuntheraceAMC]

Hey guys. Thanks for the help with this boat in the past weeks. Unfortunately after a couple weeks of the boat running well I've run into a few problems. Before I give details let me remind you of my set up. DFE 36 cat with Leo 4092 1730kv, running 648 and Prather 235 (50mm) props with OSE Raider 150. Batteries I've been using are 5s 70c 5000mah and 6s2p pulse 6s 45c 4100mah.

Last week I started experiencing trouble with the boat stalling on 6s. It would in for 30 seconds and then stall. After another 20-40 seconds it would start again full power. It did not matter if I was crushing or doing top speed runs, it would regularly cut out. When it stalled I could hear it Rebinding or I could hear the 6 beeps usually heard after initially connecting power. Then the rudder would work till the power came on within 20 seconds or so. I tried running 5s and even 3s. No change. I also lost reverse. It would never work. This made me think I should reprogram the esc. After reprogramming I had reverse but no change in the stalling.

Next I changed the radio receiver. No change. Then I threw my old SK120 esc in and it ran fine on 5s. No stalling. So I know it was the raider esc causing the issue. Unfortunately right after my 5s run, I blew up my SK120 when I ran 6s2p.

So what esc do I buy to replace this. Something to keep in mind is that I plan to go to a lower kv 4092 next year and run 8s. I was thinking the SF200. Thoughts??? (Besides that I have more money than sense)

[Peter A]

Those props you are running are pretty big for the kv. You may want to try try some others if you are after reliable speed, bigger does not necessarily make faster. Take a look at some of KFX Guy's threads on his testing and results. The 150 esc was never going to handle the current or spikes. You should look at a SF300 or MGM esc's for what you are doing.

[RuntheraceAMC]

Those props you are running are pretty big for the kv. You may want to try try some others if you are after reliable speed, bigger does not necessarily make faster. Take a look at some of KFX Guy's threads on his testing and results. The 150 esc was never going to handle the current or spikes. You should look at a SF300 or MGM esc's for what you are doing.

Fluid was just telling me that the swordfish esc's have been known to be unreliable. I was looking at the ETTi 220a proII. What do you think about that choice?

[Peter A]

Chap, you have posted the same question in three threads. Have you done any research through threads here at OSE? You can keep burning stuff or learn from those who have done it. I agree with the smaller SF esc's being rubbish, I had one die pretty quick and a V2 T-180 is holding up no problem. That is on a TP 4060 1620 kv in a Q hydro. It only runs a M445 for heat races on 6s 1P and pulls out around 4000mah for a 5 lap heat race. I know you are going zoom zoom but you need to get plenty of headroom in your setup. The SF 300 has it's issues but the main one is sorted in the thread below.

http://forums.offshoreelectrics.com/...-Swordfish-300

Or try some thing from here

http://www.mgm-controllers.com/race-boats

[RuntheraceAMC]

Actually it was two threads: one in the thread I started regarding the my first build and another in the esc section (which seemed appropriate). I have combed through the forum for ideas. I'll look into the info you shared on the sf300

[RuntheraceAMC]

update on my DFE 36 cat:

image.jpgimage.jpgimage.jpgimage.jpgInstalled my new ETTI 220a esc. Finished refining the way I set up the electronics and cooling. Added a bec for my receiver and hard wired power to my bilge pumps (one in each side of the hull and installed a fan to blow air on the esc. All powered by a 3s 1600 mah battery in the bow.

I know my water lines are a bit excessive. Two lines merge to feed the motor water jacket. 1 line splits to feed the motor mount cooling foward and aft. Two lines split to feed the four coolant tubes on the esc. A third line slits to feed two esc cooling plates installed under the cooling fan. These six lines merge to flow out the four exhaust pipes in the transom.