Best batteries for 300?

[Uriah]

Performance wise, my 4S Lynx 300X-L could eat my other 300Xs for lunch. An extra cell really does pack a significant punch if you're willing to utilize it. It's been a while since I had to do any work on it, but if my memory serves me right, I think I'm running it with a 12T Lynx slant pinion alongside the Lynx OWB assembly, and I think I'm governed to 3500RPM, 3600RPM, and 3700RPM (which is plenty for a stretched 300X). I may be using the 11T pinion, but I simply don't remember for sure (if I'm not using 11T, it would probably be the better pinion for the headspeeds I'm running). I'm going to be doing a little maintenance work on my 300X fleet this evening, so I'll be sure to check and verify and will update this thread if I find the numbers I quoted above are not correct.

[Nelsonisms]

It seems like what we really need is a good small 4S motor somewhere in the 3100kv range around 350-450W which would yield a more useful range between 12T-14T pinions. (governed 3461 - 4037 RPM)

The only specifically 4S rated Scopion motor in that KV range is the 2221-10 (3000kv) but it's 81 grams and puts out 550W. The Typhoon is 63g by HKs specs which I don't always trust, but it's obviously a little lower powered being rated for 28A. Of course HK doesn't list the watt rating of the Typhoon for comparison. But 550W is a lot even for a 450.

So now I'm wondering if some of these other Scorpion motors listed as "max 3S lipo" could actually handle 4S. In particular the 2216-12 (3350kv/375W) or the 2216-14 (2920kv/340W) are both 64g. My guess is that's probably the case, but I'm not sure I'd be willing to spend $65 to find out. Perhaps I'll give Innov8tiveDesigns a call and see what they have to say.

[KiloXray]

Back when I had the 300 and was considering this I bought a Hyp 2221-3000. Specs are at the link.

http://www.helipal.com/images/helipa...-datasheet.pdf

It's the same as your scorpion 2221-10 you mentioned. I know it's heavy but I think it would work like a beast. Especially on a stretched 300.

Unfortunately I subsequently sold it when the 300 found a new home.

[Nelsonisms]

Aha....that did give me an idea...

And what do you know...there is a Hyperion 2216-3350 and AlleRc has them in stock for $30. And they also have the 2221-3000 for $39

I'm just thinking of my 6S conversion on the 450X. It went from a 475W 3S motor to a 530W 6S motor and that feels about right. So on the 300X, it seems like going from a 330W motor (Hyperion 2213-3585) to a 375W motor (given it will handle 4S) would be a similar move. Going up to 550W would be an insane jump and would certainly drain packs quickly.

I think for $30 I might be willing to risk it to try the 2216-3350. I'll try the Typhoon first since it's already paid for, but this might be an option down the road to increase flight times without sacrificing too much performance.

BTW, sorry for hijacking the thread with motor stuff, but it looks like all the battery talk is played out anyways.

[KiloXray]

Originally Posted by Nelsonisms

Aha....that did give me an idea...

And what do you know...there is a Hyperion 2216-3350 and AlleRc has them in stock for $30. And they also have the 2221-3000 for $39

I'm just thinking of my 6S conversion on the 450X. It went from a 475W 3S motor to a 530W 6S motor and that feels about right. So on the 300X, it seems like going from a 330W motor (Hyperion 2213-3585) to a 375W motor (given it will handle 4S) would be a similar move. Going up to 550W would be an insane jump and would certainly drain packs quickly.

I think for $30 I might be willing to risk it to try the 2216-3350. I'll try the Typhoon first since it's already paid for, but this might be an option to increase flight times without sacrificing too much performance.

BTW, sorry for hijacking the thread with motor stuff, but it looks like it's played out anyways.

Poppycock. Go big or don't go! This is your beater, fly once in a while, goof off, experiment with heli anyway. What's another $9?

Don't give me that "seems about right" garbage, as though you are looking for the 300 to be this perfect little version of your X5! Unleash her inner beast, put in the big block, set it up to make you giggle and remind you that it's a TOY and you LOVE IT!!!

C"MON CHRIS!!!!! BBBWWAHAHAHAHAHAHA


Oh yeh, and sorry for the hijack Varc.

[Nelsonisms]

LOL. Damn you enablers!!!! Ok screw it...I'm going 12S on this beotch.

[KiloXray]

Originally Posted by Nelsonisms

LOL. Damn you enablers!!!! Ok screw it...I'm going 12S on this beotch.

Atta girl!

[Nelsonisms]

Originally Posted by KiloXray

Atta girl!

Killin' me

[Nelsonisms]

I just remembered I actually have a Hyperion 2221-3000. That's the motor I have in my Stingray 500. So I can give it a try too at some point. But yeah, it's powerful enough to drive all 4 rotors on the Stingray without batting an eye. In that setup it can kill a 3000mAh 4S pack in 5 minutes or less. So, just doing the math....1000mAh pack...about 1 minute 40 seconds. Of course the 300X would certainly put less load on it, but it still probably wouldn't break the 4 minute mark on 1000mAh packs.

[KiloXray]

Yeh dude, I had intended to run the 1300mah nano packs.

I just remembered that one of the other reasons I had settled on that 2221-3000 was that at 3000kv you are good to run a 14t pinion, with a peak 3900 on a castle gov. Don't forget that the clearance between the motor and the elevator servo link is pretty freakin tight on the 300x. Running a 14t gives enough clearance while using a motor with a 28mm can. 13t is cutting it awful close, 12 and 11 are not even doable I don't think.

[Nelsonisms]

Originally Posted by KiloXray

Yeh dude, I had intended to run the 1300mah nano packs.

I just remembered that one of the other reasons I had settled on that 2221-3000 was that at 3000kv you are good to run a 14t pinion, with a peak 3900 on a castle gov. Don't forget that the clearance between the motor and the elevator servo link is pretty freakin tight on the 300x. Running a 14t gives enough clearance while using a motor with a 28mm can. 13t is cutting it awful close, 12 and 11 are not even doable I don't think.

True, I hadn't even thought of that. Right now it has the 13T on it with the Lynx frame and 28mm motor with about 3-4 mm of clearance. It's going to be tight, but it just might fit...barely.

[KiloXray]

Hmm, That's interesting. I must have been running a longer servo horn length. I am pretty sure that I was running at 14t and had tops, 1.5-2mm of clearance. Too bad I don't have it to look at.

[Nelsonisms]

I'm serious, I'm betting that Hyperion 2216-3350 (or Scorpion 2216-12) is going to be the ticket so I went ahead and ordered one to test that theory along with the Typhoon. If you look at the size and number of strands of the wires between it (listed as max 3S) and the other 4S motors they list they're almost the same. I can't see any reason why it shouldn't be able to handle 4S voltage. It should give plenty of power but not eat up batteries so quickly. It would be nice if HK would actually provide consistent specs for comparison. That's the only gray area...how does it compare to the Typhoon... I guess the only way to find out is to actually run them both and look at the Castle logs.

In fact I just did the same thing on one of my planes, took it from 3S to 4S. In that case the manufacturer actually says it's OK, you just need to change the prop out for a smaller one to compensate for the higher RPMs, but the motor itself can handle it.

[xokia]

Originally Posted by Nelsonisms

I can't see any reason why it shouldn't be able to handle 4S voltage. It should give plenty of power but not eat up batteries so quickly.

The RPMs shoot through the roof so it will depend on if the motor bearings can support those RPMs. Going to 4S isn't the same thing as going to 6S. On 6S they decrease the windings so you are decreasing the current through the motor as you increase the voltage.

Using a motor wound for 3S and then running on 4S you are increasing the current through the motor as well as the voltage. The extra power comes in the form of extra motor RPMs which needs to be reduced down by gearing. You end up with a bunch more torque. A 4S system should theoretically be less efficient then a 3S system. Which it is, you will find the motor and ESC will get hotter. But in real life the efficiency difference is negligible towards flight times. I did this stuff on my trex 450 with KDE motors 4S and 6S. The 4S was a beast to fly more so then the 6S system.

[Nelsonisms]

Thanks Xokia. I guess I'll get to experiment with it soon enough. I'm starting to think I screwed up and should probably have ordered the 2920kv one instead.

[DoubleCH]

The place in Japan that I bought my Hyperion 2213-3585kV for $17 has a 2216 (bigger than the common Scopion/Hyperion 2213, Lynx 2214, Typhoon 2215) that may fit you well:

HP-HS2216-2920
340W/455W
63% off only $24.20
should be good with 13T for 4S without overspeeding the motor if you run stretch or 14T without stretch,
or 12T stretch/13T non-stretch

http://aircraft-world.com/shopexd.asp?id=3780

EDIT: oh, didn't realize you already mentioned this motor, but this place is cheap!

[Nelsonisms]

Thanks DCH. That's exactly what I was thinking. I did go ahead and order the 2216-2920 from AlleRC as well (before I saw your post...doh) No biggie, so I'll have the Typhoon 2215-3550, Hyp. 2216-3350 & Hyp 2216-2920 for tests. Once they come in and I get some tests (castle logs) I'll start another thread to talk 4S rather than continue to hijack this one.

[KiloXray]

Originally Posted by Nelsonisms

Once they come in and I get some tests (castle logs) I'll start another thread to talk 4S rather than continue to hijack this one.

You might as well join ISIS at this rate. Cyber terrorist.