Shocker 2nd Rebuild - Video

[kfxguy]

I think part of the reason they are puffing is because your nailing it from a dead stop. Looks cool and all but is very hard on your equipment. Also, swordfish escs have a lag when you let off. All mine have anyway.

[Luck as a Constant]

I've never puffed cells from hammering the throttle. "Shrug"

It's always been from running too long. Always.



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[dmitry100]

Tested it with 448 cnc right before my flight to LA.....

Needless I almost missed my flight and gf was pissed :D

But The speed of it was one whole other level with this prop though...
I'm excited to find out what it's clocking on the gps with a more distance run Once I'm back home.

Temps looked like this from a couple passes in between my checks:
Motor temps were actually fine as before maybe marginal increase.
Lipos were fine.
ESC increase in temps were the most noticeable and significant after this change which went from barely warm to around 95* F.

I'll have more specific ESC log data from the SF once I'm back...
Curious what amp's and rpm's I'm pulling here's.

I gotta say... This prop is HUGE compared to the 442's I started with and I'm surprised it's able to spin such a big prop.

One thing that bothers me is that the "max amps" specs off the TP motor site says only 150 amps.
I think I'm a bit beyond that I think... Definitely will check logs to be sure.
Just how much past the specs are you guys able to push these guys safely?

[kfxguy]

I've never puffed cells from hammering the throttle. "Shrug"

It's always been from running too long. Always.



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Ill just quit trying to help people. Always have someone to disagree. I guess I must know literally nothing about nothing. Well no worries, I won't be answering any more questions or giving any more advice.

[Luck as a Constant]

Shocker 2nd Rebuild - Video

Ill just quit trying to help people. Always have someone to disagree. I guess I must know literally nothing about nothing. Well no worries, I won't be answering any more questions or giving any more advice.

Stop it.
Jesus dude, I can't even share my experiences that differ from yours without you crying like a baby about it.

I've never puffed batteries from hammering the throttle, is that ok with you?

Dmitry can take your advice or mine. I could care less. But who really cares?
Move on...

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[lt130th]

This reminds me of the Ford fans vs GM fans. One side says all their Chevrolet, Pontiac, Buick, etc. vehicles have been nightmares and all their Ford, Lincoln, Mercury, etc. vehicles have been a dream...while the other side says all their Chevrolet, Pontiac, Buick, etc. vehicles have been wonderful and all their Ford, Lincoln, Mercury, etc. vehicles have been crap. No matter what, there will always be opposition to anything anyone says, good or bad, about any car make & model. The important thing is to remember, at the end of the day, it really doesn't matter. Humans are silly creatures. I bet the rest of the animal kingdom wishes we'd just shuffle off to play out our drama on some other planet. Their all rolling their eyes at us.

As far as puffed LiPo's go, I'm a throw caution to the wind kind of guy, so I say don't worry about it until cells really stop charging. In MY experience, the only thing truly constant from one RC boater, to the next, is the money flowing out of our wallets for this hobby.

[dmitry100]

As far as puffed LiPo's go, I'm a throw caution to the wind kind of guy, so I say don't worry about it until cells really stop charging. In MY experience, the only thing truly constant from one RC boater, to the next, is the money flowing out of our wallets for this hobby.

Yea I don't think it's puffing ... Just trapped air. I have seen a few puffed lipos and this wasn't it. Both times it was the same and went back to normal shortly after cooling down. But yea i could def see how punching the throttle like that could stress the crap out of them though.

All your guys' advice is good... Learning a lot here so keep it coming

[kevinpratt823]

Punching the throttle at the beginning of the run is usually fine, but high draw when the cells get down on capacity will certainly do a number on them IME.

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[kevinpratt823]

There is a difference between "swelling" and "puffing". Lipos swell under normal use, and return close to normal at least, puffing does not return to normal.

I have run puffed packs that were still charging and balancing fine, but when they let go they blew up to 3x normal size and could easily have split a hull open, nevermind the potential of fire.

And fwiw, when a lipo puffs, it is usually from damage done a cycle or two before from what I have been told.

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[kevinpratt823]

Ill just quit trying to help people. Always have someone to disagree. I guess I must know literally nothing about nothing. Well no worries, I won't be answering any more questions or giving any more advice.

No offense dude, but you need to get over yourself. I'm not that important, and neither are you. Not everything anybody posts is an attack on you, it's called a "discussion" forum, people share their experiences, opinions, and once in a while a sneaky little fact even leaks through all the BS.

http://www.merriam-webster.com/dictionary/discussion

[tlandauer]

Hi Kevin, if the air is trapped in the wrapping, would it disappear if I puncture the wrap? (just for my curiosity). I have the "Blue wrapped" lipos that was quite popular a couple of years ago and they "air puff" easily, at the end of my run they all puff up, then goes down once it is cooled and charged back to storage voltage. I am not worried about the batteries as I have never over run them, but the puffy condition annoys me a bit from time to time. On the other hand, I had those relatively cheap SkyLipo, they are hard as a brick till this day and it's about 4+ years.

[tlandauer]

OP, I am sorry to go off topic, but I just want a quick answer here.

[kevinpratt823]

Hi Kevin, if the air is trapped in the wrapping, would it disappear if I puncture the wrap? (just for my curiosity). I have the "Blue wrapped" lipos that was quite popular a couple of years ago and they "air puff" easily, at the end of my run they all puff up, then goes down once it is cooled and charged back to storage voltage. I am not worried about the batteries as I have never over run them, but the puffy condition annoys me a bit from time to time. On the other hand, I had those relatively cheap SkyLipo, they are hard as a brick till this day and it's about 4+ years.

I didn't post about it, because I don't want people to get bad/dangerous ideas from me, and I knew many people would just shake their heads at the thought of it, but I was willing to accept the inherent danger, so here goes-

Last year I experimented with this. While separating a good, like new TP 6s into (2) seperate 3s packs, I inadvertently cut a small slice into the foil. I immediately covered it with electrical tape. I made a few successful runs with it, so I tried "venting" the air out of a couple packs that were puffed, but still charging/balancing. I knew that if the internals were exposed to moisture and other contaminates, things could get ugly real quick while discharging in the boat, so like I said, this was strictly an experiment. I'm the guy who absolutely has to pop the blister on his hand to let the fluid out, so the puffy packs were killing me lol. The second pack I tried to vent, the exacto blade went just a touch too far in, poked the cell, and I had an arc against the foil of some sort, that one went straight into the saltwater bucket, and I started to look at the other packs a little nervously. I believe I may have even gotten that lipo smell out of one of them when it came back from a run. I promptly began reconsidering even having these packs in my house, and the rest of them went in the saltwater bucket as well.

The thing is, this foil is some real impressive stuff. It holds that gas in really well, even when expanded. Nothing you do to repair a puncture is going to withstand the pressure of even normal swelling, and once those cells are exposed to moisture and other air contaminates that will inevitably find their way in, all bets are off. I was willing to risk my boat in this experiment, but I am not willing to risk my house and the people in it.

So in short, yes, if you puncture it the air will escape, but no, you should not do it IMO. It is a dangerous process in the first place, and extremely dangerous afterwards. Any lipo manufacturer will tell you that if that foil is damaged or compromised in any way to dispose of it. So any lipo that ever gives off that vented smell goes right in the bucket for me.

[tlandauer]

Thank you for your very informative reply.
Rest assured, I wasn't going to poke a hole in there, but I was just curious because I had no idea ( up until I just read your reply) that the foil can trap the air this well, to me it almost defied logic since the tire on my car doesn't hold air this good.
So glad I learned something. Thanks, man!

[flraptor07]

Thank you for your very informative reply.
Rest assured, I wasn't going to poke a hole in there, but I was just curious because I had no idea ( up until I just read your reply) that the foil can trap the air this well, to me it almost defied logic since the tire on my car doesn't hold air this good.
So glad I learned something. Thanks, man!

Yeah I've never tried to vent mine either, I've got a couple of Hyperions that will air swell the wrappers sometimes. I just deal with it and they return to normal when they cool.