Lipos puffing on a conservative setup, what gives

[785boats]

This was definitely a longer run, 5 min. But mid speed, a few fast passes. But this thing has baked 2 lipos in about 2 minutes before. Perhaps 2 3s in series is no bueno?

Just as a comparison, I run that same motor in a 36" mono spinning an X447/3 blade prop.
A race including a mill lap lasts about 1:40sec.
A pair of 3s 5800mah 60c packs are down to about 25-30 percent at the end of the race.
So a pair of 5000 40C packs must be hurting after more than 2 minutes. Especially if there is a lot of stopping & starting, or if the hull is running wet.

[grsboats]

Many Turnigy batts puff in normal conditions BUT 5 minutes running can kill very shortly a batt.Anyway check the inside of your batt and see if it is a 5.0A.....I had a similar issue with a Turnigy pack and figured out that that junk batt was only 4,5A...there is an old thread about this. Gill

[Doby]

You should be running 6S2P

Best advice ever.

[kfxguy]

Best advice ever.

Bingo

[785boats]

It would be nice to have that option for racing here in Australia, but we are only allowed to run 1p and with a total weight of 950 grams for the 6s pack. And 650 grams for a 4s1p pack. So that limits prop size for us if we don't want to destroy batteries.
But yes, for a sport boat 6s2p would be the way to go. Or drop the kv rating down to 1250kv, or so, for less current draw.

[kfxguy]

It would be nice to have that option for racing here in Australia, but we are only allowed to run 1p and with a total weight of 950 grams for the 6s pack. And 650 grams for a 4s1p pack. So that limits prop size for us if we don't want to destroy batteries.
But yes, for a sport boat 6s2p would be the way to go. Or drop the kv rating down to 1250kv, or so, for less current draw.

Agh...well you have a good point then. So maybe go down on kv a little like previously recommended.

[JohnZ]

There are some complaints about the new Hyperion packs puffing prematurely under normal use. I have read a number of threads over at RC Groups complaining about the new Hyperion G6 HV packs. I have one of these in my stock and only have a couple cycles through it so far, not even down to minimum yet so I'll have to keep an eye on it as i continue to break the pack in.