WOW - I just flew Gens Ace 3300 in the 700 - sweet!

[phranticness]

I picked up some Gens Ace 3300's (25c) for another application but figured I"d give them a shot in the 700. I run Telemetry so I felt safe trying out the smaller packs. I flew really conservatively because I was setting up a flybarless unit, but wow. The 700 felt so much lighter, it was awesome. Flight time wasn't shortened either, 5:30 and no voltage alarms. - The weight loss I'm sure makes up for some of the capacity loss, but I would really only expect somewhere around 4 minutes.

The true test will be a few real flights, they provide enough amperage at 25c, but you never know how a pack is going to really handle it until you fly hard.

CG was good, a little tail heavy, but really just a tiny bit.

I'll report back, but I'm excited about this, serious weight loss.

[350Z_Al]

Try doing a CHP DL conversion and drop even more weight

3300 25C packs will only give you 82 amps continuous. Those packs won't last long, or play nice with a 700.

[phranticness]

Originally Posted by 350Z_Al

Try doing a CHP DL conversion and drop even more weight

3300 25C packs will only give you 82 amps continuous. Those packs won't last long, or play nice with a 700.

I may want to put it on a diet


I think you're math is off, but correct me if I'm wrong 3300 X 2 = 6600 X 25 = 164amps continuous. Either way, I've checked my esc logs and peaks are usually only around 100, typically 30-60a. It's a stock 750mx.

Regardless of the ratings - I don't expect the life of the packs to be phenomenal, but as long as I don't take them below 80%, they should last an average amount cycles.

[-kenny-]

You can't add up mah if you connect packs in series. Your pack stays at 3300 mah you only add up mah if you connect paralell, but then the voltage stays the same.

[phranticness]

Originally Posted by -kenny-

You can't add up mah if you connect packs in series. Your pack stays at 3300 mah you only add up mah if you connect parallel, but then the voltage stays the same.

Ahh, ok. Corrected. Thank you, good to know. Even so, for my flying style and the current gear, I'm within the specs for the battery. + I may find that the peaks and averages are lower with a smaller lighter packs.

At 82.5a, I am right at the edge so I'll clear the CC logs and keep and eye on it.

I'll update the thread with my results in case anyone in the future does a search on the 3300's. I didn't find many threads on batteries smaller than 4000mah.

[WBFAir]

Just to mention it, one thing I have been learning a bit about lately is the whole thing over what packs are labeled for their C ratings, and what they actually are.

I'm not an authority on it enough to go into it but from what I've been reading, supposedly the GenAce 25C's are rated at much truer C rating then virtually all others.

Basically it boils down to what IR you actually have and so if your are able to check that on your packs and do some of the other math, you will actually find a lot closer what your true rating is.

And not surprisingly, a lot of the packs out there aren't even close to what they are being labeled. And not just the cheap ones. Which btw based on this but just to go in the other direction, with the GenAces showing true output of 25c's also kinda means that using 25C's of others could be quite less.

Not saying that to throw stones at anyone but in general there has been some discussion on this topic lately on a lot of the boards and would suggest anyone who is interested look around for some of the info.

[phranticness]

I agree. I find it interesting that zippy 2650 6s 45/90c weights the same as a Gens Ace 2600 6s 25c, both are 480 grams, interestingly the GA 2200 30c is 480 grams too.

[K2Freak]

I'm not an authority on it enough to go into it but from what I've been reading, supposedly the GenAce 25C's are rated at much truer C rating then virtually all others.

Not for nothin (always wanted to say that), but I find that the 3800 25C Gens that I am currently running are noticeably more "peppy" than my "40C" Sky Lipo 4400s ever were...

[michael503]

so has anyone tried the 4000s that Gens Ace makes?

[michael503]

Originally Posted by phranticness

I picked up some Gens Ace 3300's (25c) for another application but figured I"d give them a shot in the 700. I run Telemetry so I felt safe trying out the smaller packs. I flew really conservatively because I was setting up a flybarless unit, but wow. The 700 felt so much lighter, it was awesome. Flight time wasn't shortened either, 5:30 and no voltage alarms. - The weight loss I'm sure makes up for some of the capacity loss, but I would really only expect somewhere around 4 minutes.

The true test will be a few real flights, they provide enough amperage at 25c, but you never know how a pack is going to really handle it until you fly hard.

CG was good, a little tail heavy, but really just a tiny bit.

I'll report back, but I'm excited about this, serious weight loss.

How much did you put back in, what's your headspeed, and what kind of flying do you do?

[rando]

Originally Posted by michael503

so has anyone tried the 4000s that Gens Ace makes?

I have a pair of gens 4000/25c I fly in my 700e. I only fly mild big air sport style and I can easily notice the drop in weight / extra punch. Flight times are about the same as I get with zippy 5000 packs putting back 75-80% capacity. Head speed is governed around 2050RPM +/-12 deg on collective. I suspect, as others have concluded, that 4000-4500 is the sweet spot for the 700e.

[michael503]

Originally Posted by rando

I have a pair of gens 4000/25c I fly in my 700e. I only fly mild big air sport style and I can easily notice the drop in weight / extra punch. Flight times are about the same as I get with zippy 5000 packs putting back 75-80% capacity. Head speed is governed around 2050RPM +/-12 deg on collective. I suspect, as others have concluded, that 4000-4500 is the sweet spot for the 700e.

Thanks!
what are your flight times?

[rando]

I've been messing quite a bit with vbar set up and governor settings so it I haven't had a chanec to dial every second out of the flight time yet. For now the timer is set at 5 mins and typically they have been taking back 2600-2800mAh depending on the head speed and how hard I was banging the collective.

[michael503]

Thanks, I've been running a Hyperion 4400 pack for about 2 years now and its starting to show its age with longer balance times. I figure the high summer temps here will finish it this season. I burn between 3000 and 3300 in 5:30 with a lot of big air and power climbs. I'm gonna need another pack in the next few months and have been looking intently at the GensAce 4000 since the one in my 500 is doing so well.

I cannot and will not spend another 375 bucks on a flight pack. It is just too much for my budget

[phranticness]

So I've had a chance to get a few more flights in with teh 3300's. I had to lower my telemetry warning voltage because the 3300's sag more than than the larger batteries. But flight time is decent at 5 minutes with 80% put back in. They come down just has hot as the 4000's (fairly warm) I have not really hammered them like I do with the 4000's, but I typically fly the 4000's for 5:30 and put 80% back in. I have a stock V1 700 ungoverned. I fly two curves, one for early in the battery, the second for the latter half of the pack 95 to 85 and 100 to 90 (V)

I need to get some more flights in to give a good review. At this point I can say that they work decent. I would only suggest them to someone if you were getting a great deal on the batteries. 4000's work the best for me as I'm sure they do for most. But the 3300's do work and make the 700 feel much lighter. (to me