6s rigger and only 37mph? help

[sailr]

I doubt the different lengths on the battery wires is causing a problem. The half/speed problem of the esc is a consideration. I'm glad to hear that because I have a Seaking ESC I haven't used yet! I'm really surprised by that because I have used a lot of that same company's esc's in airplanes and never seen that problem.

[crabstick]

I would definately be taking a look at that flat on the shaft, I never run without one, see if its been slipping.

Any pics of the current setup yet??

I don't think that the Zippys are very good at the high amp draws you are experiencing.

Jay just wondering if you have some Data on this topic ? Not saying that you are wrong or anything, just wondering if and how you have tested them and what the results were.

[Brushless55]

have you checked your esc?
Possible your esc is not letting the motor run with all those volts

Your on the right path with all your checks in place

[D. Newland]

... all of my 6s hulls have run starting into the 50s, untuned and even running wet. so I am trying to pinpoint the cause......

I posted on RRR also, but just noticed this thread and that you have more info to share about your troubles.

Does this rigger look as fast on the water as your other hulls? I guess I'm still wondering if you've got a GPS problem or a boat setup problem. Figure out that one, first.

[NorthernBoater]

Nate...Thanks for the compliment...it was a great build...just not happy with the speed.
balancing...I charge the 3s seperately...and run them in seires...this is not a single 6s lipo...just for the information. they are balanced out at about 12.51 each pack. I am NOT using a balance harness. I have the 5.5 bullet connectors, soldered directly to the leads, and basically make a balance connector with the lipo leads...instead of using a y harness etc. so I am getting the 22.2 voltage.

Are you not using the balance connectors to charge the batteries.

[Brod]

I'd put money on it being your esc cut off point.
I run 3 of them and all showed the same signs,low power almost from a full pack and very short run times.
Setting the auto lipo count off did the trick,set it to '1 lipo' and power instantly doubled.Its easy to tell when your packs are waining and then bring her in.
Cutoff voltage is obviously not accurate on these speedcontrollers.
Brod..

[crabstick]

I'd put money on it being your esc cut off point.
I run 3 of them and all showed the same signs,low power almost from a full pack and very short run times.
Setting the auto lipo count off did the trick,set it to '1 lipo' and power instantly doubled.Its easy to tell when your packs are waining and then bring her in.
Cutoff voltage is obviously not accurate on these speedcontrollers.
Brod..

Brod could be onto a winner here!

[yurkanip]

Hey guys....just got home from my 5 hour trip from my bros cabin. Just read all of the messages posted since my departure....I wanted to thank you all for your input.....I am starting with grinding a flat on the motor shaft...first.
Next...I am going to try to set low voltage cut off to "no cutoff" Brod...did I read this correct in your post? also...setting your lipo count, to "1" is that what you meant? I have it currently set to 6 since I am using 3s in series. and yes, it acts as if its half power.

wondering if it will arm, correctly using this method, since I am running 22.2 volts. I know a lot of guys on here have been running the seaking escs...particularly the 180a, but have not had anyone say anything about the half power issue, that mine could be suffering from. and it makes total sense now. though..since if it is running half power, on such a high voltage setup....my heat issues MUST be directly because of that.

I will take a pic of the business end of the hull tonight or tomorrow...since some of you asked. I do not have a video camera, so no video with this post...I know it would help a ton though.

more to come...Thanks again guys.

[Brushless55]

have you checked your esc?
Possible your esc is not letting the motor run with all those volts

Your on the right path with all your checks in place

[Brod]

Hey guys....just got home from my 5 hour trip from my bros cabin. Just read all of the messages posted since my departure....I wanted to thank you all for your input.....I am starting with grinding a flat on the motor shaft...first.
Next...I am going to try to set low voltage cut off to "no cutoff" Brod...did I read this correct in your post? also...setting your lipo count, to "1" is that what you meant? I have it currently set to 6 since I am using 3s in series. and yes, it acts as if its half power.

wondering if it will arm, correctly using this method, since I am running 22.2 volts. I know a lot of guys on here have been running the seaking escs...particularly the 180a, but have not had anyone say anything about the half power issue, that mine could be suffering from. and it makes total sense now. though..since if it is running half power, on such a high voltage setup....my heat issues MUST be directly because of that.

I will take a pic of the business end of the hull tonight or tomorrow...since some of you asked. I do not have a video camera, so no video with this post...I know it would help a ton though.

more to come...Thanks again guys.

It will take a bit of practise to count the beeps when programming via the TX,make sure you do it in a good quiet environment,ie no kids!
It took me at first a good 5 or 6 attempts.
In '1 lipo' i call it as 1 beep after its setup right.keep the setting as 6 cell if thats what you are using.
You'll see what i mean when you've done it.

Also these esc's are set as 15 degree timing as default,which is perfect for my Medusa 4 pole motors,your Feigoa 2 pole possibly prefers a lower setting,try 3.75.
A higher timing will make the motor run hotter.

Brod..

[sailr]

I once had an aircraft controller that exhibited the same problem. Finally set it to "no cutoff" and viola...problem solved.

Brod is right on about the timing also! 2 pole motors require lower timing advance.

[yurkanip]

OK did some testing last night. I started by turning off low voltage cutoff, all together. It solved the half power problem...got a good 5 minute run. when the wind died for about 10 minutes...I was able to squeeze 42mph out of the hull..it was running wet, so I lowered the strut, and it ran 37, with a LOT less heat issues on the motor..motor was only warm, not HOT. Lowering the strut seemed to help a lot, and made it jump out of the water...
before I lowered it, I think most of my heat issues were due to a strut too high and a lot of prop slip....ALONG with the esc programming issues..that were easily fixed once I turned off low votage cutoff. I was running with two guys who had sv-27s and they commented on my hull dragging a little...that is when I raised the strut it helped the rear a LOT. (even though I am still running a single rear ski, under the stuffing tube).
I have no more room to move my (2) 3s packs inside to shift the front weight back any more...to change the angle of attack...since it is a fe hull, the sponson tubes are sealed. it might be time to add some angle, to the bottom of the sponsons like folks are doing on the miss vegas, dunlap sponson mods.

long story short....the esc issue is figured out. I have full power, and no low voltage cutoff problems like I had over the 4th of july weekend. But still slow in comparison to any 6s rigger I have seen run, or run myself.

thoughts, I did not take any pics, last night but will take the camera along with me the next run.

[NorthernBoater]

Next thing I would try is different batteries. The Zippies are probally being over stressed.

[RPC1]

I run Zippy 6s 5000mAH 25c batts in my 30" hydro. With a m642 it will do 55mph and the batts are barely warm.

[RPC1]

I would say the motor is not running strong anymore. Or the x640 may be detounged too much for a 34" boat and ventilating too much, or too small of a prop. Can you try a m545 or x642? You should be in the high 40's/low 50's. How heavy is the boat?