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Century Radikal E640 - Swift 16 NX
› Really bad battery life..?
10-20-2004 03:00 AM  13 years agoPost 1
svtcobra66

rrNovice

Orlando, FL

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Hey, I've got a speed 300 in my hummingbird w/ the stock pack, and I get maybe 4 minutes of hovering time. Whats going on? Is this normal? I don't want to switch to lithiums if there is another problem besides the stock battery pack. Thanks
Chris

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10-20-2004 03:23 AM  13 years agoPost 2
falcon247 - Brandon (RIP)

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Phoenix, AZ USA

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Youre lucky then. Mine won't get off the ground with the bird seed batt pack.

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10-20-2004 03:56 AM  13 years agoPost 3
blu-thang

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So.Calif

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How long do you charge your battery ? Weight play a role Also.

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10-20-2004 05:00 AM  13 years agoPost 4
svtcobra66

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Orlando, FL

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I have a digital peak charger, and it peaks... so i don't understand what is going on.

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10-20-2004 06:06 AM  13 years agoPost 5
ScaleBrad

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Longwood, FL USA

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4 minutes is about normal for constant hovering with the stock birdseed. Takes a lot of juice to hover.

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10-20-2004 07:52 PM  13 years agoPost 6
pancake

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Seattle, WA

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Wow, I get ~6 min with the HA tail motor also. I think 4 min is too low.

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10-20-2004 11:43 PM  13 years agoPost 7
Carlos2

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It could be a main or tail motor that is starting to die or was just not so great to begin with.

The three hummingbird motors I got were never that great and had poor performance.

However, I wouldn't expect that much more with the bird seed. I get about 5.5 to 6.5 min on mine, and I consider it pretty much optimal (a timed Acro 280bb).

Playing around with things like gearing and headspeed can make your flightimes change one way or another too. Just not my much unfortunately.

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10-21-2004 02:58 AM  13 years agoPost 8
svtcobra66

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Orlando, FL

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If I switch to a lithium pack, what else do i have to get? Would I need to buy a lithium-safe esc, and if so, how would it work with the hummingbird?
Thanks
Chris

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10-21-2004 01:12 PM  13 years agoPost 9
falcon247 - Brandon (RIP)

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Phoenix, AZ USA

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A lithium safe esc? One that will handle the extra voltage if running a 3s is fine. You will need a Li charger though.

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10-22-2004 01:47 AM  13 years agoPost 10
Carlos2

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I think I've heard of people running a 3 cell on a stock hummingboard without problems. It might be worth posting a question on that to see people's latest experiences.

When I go with Li-po's I'm gonna make sure I make a "safe" charging area and a way to contain a battery in case of explosion. I've heard a nice fireproof containter such as an old metal ammo box filled with sand, or better yet, a pyrex dish with cover of some sort (non-conductive) filled with sand. Lipos actually spew fire when they explode and can easily burn your house down if they were to. Be extra safe with them.

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10-22-2004 04:29 PM  13 years agoPost 11
falcon247 - Brandon (RIP)

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Phoenix, AZ USA

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I've used a 3s in my stock hummingbird CP. As long as you have the DD or dual tail motors you should be fine. It works fine in mine when the thing dosn't have some problem keeping it on the ground.

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11-18-2004 09:59 PM  13 years agoPost 12
jb92563

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LiPo 3s

If your current battery provides 8.4 volts and your motors are warm or hot, what do you think a LiPo 3s battery that puts out 11.1 volts will do?

Better stock up on new motors, your going to need them!

A LiPo 2s is 7.4 volts and might be a better choice.....a DragonFly 2004 does just fine on that.....although not sure about a HB.

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11-19-2004 12:15 AM  13 years agoPost 13
Jarod

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USA

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I would always get 4-6 min off a birdseed battery with a totally stock configuration. If you add the DD tail then you should expect 3-5 min fly times. What a pain buy some lipos. I get 16 min off of a thunder power 1320 7.4v and 26 min off the 2100 7.4v. Yes I said 26 min if that seems like allot. I can stay up longer in duration with my hummer then the nitro pilots can. Lipos are what has made this hobby worth while.

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11-19-2004 01:02 AM  13 years agoPost 14
blu-thang

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So.Calif

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I recently switched to E-tec 2 Cell 1200 mAh Li-poly With a Stock Set-up and DD Tail Motor And Boy What A Difference! I Fly for about 10 mins Let Cool for about 1 min and then Fly For another 10 mins .

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11-19-2004 02:34 AM  13 years agoPost 15
heli_guy37

rrApprentice

united states

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Honestly, No matter what you hear of lipos exploding or catching on fire all that extra precaution is not neccasary. Now before you guys go nuts hear me out. I was once afraid of them also I mean way afraid. I have an apache charger it is basically idiot proof. It wont let you charge it about 1C it just plane wont let you. if theres a short or overload it wont turn on. Now if you watch your battery while it charges and pay attention to what the charger is telling you your basically fool proof. It a lithium is at the point of exploding which is rare without a short circuit but it does happen the lithium/ charger will get beyond normally hot this just tells you unplug me and check it out further. BUT if you ignore this sign your still not microwaves. The battery pack will then start to swell before it eventually explodes if you miss all these signs you are of course not paying attention which is your own fault or an idiot. I will look for a link but there is a site of just lithiums it shows them testing and blowing them up to show you what precautions to take. I am also thinking of gettting a V3 hummingbird and was wondering if my 2cell lithiums would power it and for how long??? I have 2 etec 700's a thunder power 860 and a thunder power 1830mah. Will these work in the v3 with no mods and will it burn the motor or be about right? Thanks Josh

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11-19-2004 03:51 AM  13 years agoPost 16
Jarod

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USA

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Those batteries will work fine with a stock setup or even a DD tail motor.

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Century Radikal E640 - Swift 16 NX
› Really bad battery life..?
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