Shocker First Maiden Run -- ESC Literally BLOWS through Hull

[kevinpratt823]

That is odd......A while back they had issues with some Spektrum radios, where no matter how you calibrated it it would not recognize full throttle, unless you cranket the epa up about 25% after calibration, but that issue has been fixed. Could be something similar with the Flysky throttle bandwidth.

Whatever you do, be sure to check the data logging, comparing the 2 controllers, and looking to see if they both reach 100% throttle, and that the curves look similar.

[dmitry100]

By the way guys... my teflon tubing seems to be coming out from the stuffing tube... Not sure if I want to put the boat in the water just yet. Anyone have any ideas on how I can keep them from coming back up like this, or is it not a big deal? Perhaps I should pull them a bit towards the drive. The other side's teflon comes out just slightly, but this left side seems comes out all the way towards the collet rather quickly...

Also, would the SF ESC motor timing of "auto" should work fine for these TP 4050's? or should I set it to a specific value of 8* or so?

[ray schrauwen]

That being the starboard side, what direction is that shaft turning? Viewed from rear CW or CCW?

Not using the other aluminum motor mount/alignment parts?

Some silicone cooling tube can keep it from creeping up.

[785boats]

I wouldn't think that bit of creepage on the teflon liner is a problem. You have plenty of it down in the stinger.
With the Swordfish ESCs that I've set up have, I've always used the Auto timing. Let the ESC take the guesswork out of the equation. Seems to work well for me.

[srislash]

Dmitry, I think I will hold onto them, they were on my limos hull and I may revisit that project. They are theses in the small version http://www.wd200-modellbau.de/?Antri...owerdrive_maxi

[kevinpratt823]

Silly question maybe, but are you sure the motor rotation is appropriate for that flex? When turning correctly, the flex tightens, and the thread of the wires moves away from the motor, if anything pushing the flex back.....

[dmitry100]

Ray: it's turning counter clockwise.

I'll double check the direction of flex's to make sure the guy didn't make another boo-boo.

[dmitry100]

srislash: Why do those german retailers always have a million different similar sounding sites lol. Does the usual place https://www.mtc-powerboat.de not sell anything anymore? I'll probably just pick up some MBP drives or something.

[dmitry100]

Ok, so I tested the hull for water and afterwards tested the throttle -- spun the props in the dry... and it seems like water started coming out a tad bit (on left side of first pic). Should I be worried, or would this not happen once it's in the water? Just wouldn't want to get the hull full of water in a short run... so taking extra precautions here. I greased them up pretty good too.

Heres a pic of the flex's: They would be spinning inwards.

Left side:
Photo May 14, 1 27 26 PM.jpg

Right side:
Photo May 14, 1 27 32 PM.jpg

[tlandauer]

I may be dense: but I think you got it exactly opposite------ Your right side is actually what we call the Port side. When calling sides, you need to look at the transom. If you are the driver, your left arm is the Port Side which is defined as the LEFT side. Starboard side is the right hand side.

SWAP out the cables, they are also placed exactly opposite of what you want----IF YOU WANT YOUR PROPS TO SPIN INWARD that is.


P.S.
If you intend for the props to spin outward: Port side prop= CCW, Startboard prop=CW, then leave the cables where they are.

[ray schrauwen]

Silly question maybe, but are you sure the motor rotation is appropriate for that flex? When turning correctly, the flex tightens, and the thread of the wires moves away from the motor, if anything pushing the flex back.....

I was thinking this too...

----

I remember I took out my teflon from a Sport Hydro because the Teflon was spinning slightly when I bench tested it. Now I run no Teflon and things run cooler a bit. This doesn't mean this is your problem though, just sharing...

[dmitry100]

Yea... the good news is that you guys are right. I switched them up and the boat ran nicely... maybe even too cold. Not even a slight increase in temps at nice/fast runs.

Bad news: it happened to be sort of windy and ... the boat flipped. Not sure if it was due to the trim or what but I'm sure that was a big part of it. The boat was at full throttle the entire time till the end while it was flipped... not until it blew up at least one of the motors and the stuffing tube!!!!!! Radio was unresponsive. What kind of stupid ESC or radio runs their crap at full throttle on a flip like that? I guess it must of lost contact while upside down (since antenna was in water).

I think ESC's should be are fine though... they were around 120 when i checked them. Motors were prob beyond that. So once again... no fail safes seemed to go off. I guess it could have been worse-- like water getting inside of it on the flip.

So.... yea.... the boat is outside in the backyard cooling off.

Hmmmmmm... so much for that.

Here's the pics:

[ray schrauwen]

I was going to say something about the amount of unsupported stuffing tube. Why didn't you use the other mount alignment pieces?

Sorry about the damage, that sucks.

[dmitry100]

This gives way to a better drive... I *have* to replace it with some good ones.

I'm assuming the crappy ass Flysky was at fault. What do you guys think did this? Could it be that the "servo reverse" option was set by default and at loss of contact it did full throttle instead of throttle cut off?
Dunno.
Days of work... all gone in like 30 seconds.
I think I'm gonna go cry now.

I have a well earned name for this boat now: Kamikaze or Pyro.

[kfxguy]

You seem to be having the same luck as me, just not as costly. I've got a $500 paperweight called a lehner 2260 and a $300 paperweight called an mgm 25035 x2. So I guess my motor went and took the Esc with it. Figures.


On a side note, sounds like your throttle wasn't calibrated correctly on the Esc. If a swordfish loses signal and the throttle is calibrated correctly it will go to neutral.