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Old Jun 26, 2012, 02:07 AM
Chillaxin dude!
BulletMaster's Avatar
Newcastle, NSW, Australia
Joined Apr 2003
4,804 Posts
wouldn't suggest 4S NiMh anyway.. especially not with 2,4 gear.. 5S minimum NiMh I believe, if you absolutely MUST use NiMh..
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Old Jun 26, 2012, 09:30 AM
Registered User
Lenny970's Avatar
Greeley, Colorado, USA
Joined Feb 2000
2,858 Posts
Quote:
Originally Posted by jackosmeister View Post
No ones gonna answer that for you man. Its risky.

The only way to find out is too test the snot out of it, and use the A9 telemetry to tell you whats up. Nimh suck, and how well they perform is depends on bunch of stuff, including age.
It will probably work just fine.
A few years ago, when weight was more critical in F5B models, we used to use small packs like that.
They perform fine as long you treat them right. In fact, I still use a 4-cell nimh pack, though a bit larger in size.

Give the pack a slow forming charge, then several charge/discharge cycles to measure the mah capacity. It can take 5 or more cycles to come up to capacity.
Then, charge before the flight and verify voltage with a loaded voltmeter.
If the pack it not used regularly, you will need to repeat the forming/charge/discharge routine to "wake it up" again.

Good luck,
Lenny
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Old Jun 26, 2012, 10:41 AM
You down with EPP?
johnnyrocco123's Avatar
Houston, Tx
Joined May 2009
6,827 Posts
Quote:
Originally Posted by Lenny970 View Post
It will probably work just fine.
A few years ago, when weight was more critical in F5B models, we used to use small packs like that.
They perform fine as long you treat them right. In fact, I still use a 4-cell nimh pack, though a bit larger in size.

Give the pack a slow forming charge, then several charge/discharge cycles to measure the mah capacity. It can take 5 or more cycles to come up to capacity.
Then, charge before the flight and verify voltage with a loaded voltmeter.
If the pack it not used regularly, you will need to repeat the forming/charge/discharge routine to "wake it up" again.

Good luck,
Lenny

What Amp rate would be a good slow forming charge Lenny?

It's a 250mah pack, I was thinking 1C, but I guess that is not slow.
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Old Jun 26, 2012, 02:58 PM
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Lenny970's Avatar
Greeley, Colorado, USA
Joined Feb 2000
2,858 Posts
Quote:
Originally Posted by johnnyrocco123 View Post
What Amp rate would be a good slow forming charge Lenny?

It's a 250mah pack, I was thinking 1C, but I guess that is not slow.

No, that's not a slow charge rate.
Forming charge should theoretically be done at about 1/10C, or 25ma for 10-14 hours for this pack.

Lenny
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Last edited by Lenny970; Jun 26, 2012 at 08:16 PM.
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Old Jun 26, 2012, 03:12 PM
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drice's Avatar
United States, CA, San Diego
Joined Jul 2004
433 Posts
1/10C would be 25mA, or .025A.

Just saying...
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Old Jun 26, 2012, 04:40 PM
You down with EPP?
johnnyrocco123's Avatar
Houston, Tx
Joined May 2009
6,827 Posts
Quote:
Originally Posted by drice View Post
1/10C would be 25mA, or .025A.

Just saying...
Yeah, I don't have a charger that will snail charge.
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Old Jun 26, 2012, 08:18 PM
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Lenny970's Avatar
Greeley, Colorado, USA
Joined Feb 2000
2,858 Posts
Quote:
Originally Posted by drice View Post
1/10C would be 25mA, or .025A.

Just saying...
Don,

I just wanted to see if anyone was paying attention.

Correction made.

Thanks,
Lenny
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Old Jun 26, 2012, 09:07 PM
Speed Demon
GregG's Avatar
Antioch,CA,USA
Joined Dec 1999
12,312 Posts
How thick can the wing servos be?
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Old Jun 26, 2012, 11:24 PM
Crashing into the sky!
jackosmeister's Avatar
Auckland NZ
Joined Aug 2007
7,326 Posts
9mm
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Old Jun 27, 2012, 12:09 AM
One Idiot is plenty...
Dbox's Avatar
Planet Earth
Joined Jun 2005
5,186 Posts
Greg,the best ones are Hyperion D09 AMD and Airtronic 802.
Easy fit,precise ,slop free, digital,affordable
Non digital -Dymond D-60
Will finish Your plane at the end of the week.
Yuri.
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Old Jun 27, 2012, 09:24 AM
Speed Demon
GregG's Avatar
Antioch,CA,USA
Joined Dec 1999
12,312 Posts
Quote:
Originally Posted by Dbox View Post
Greg,the best ones are Hyperion D09 AMD and Airtronic 802.
Easy fit,precise ,slop free, digital,affordable
Non digital -Dymond D-60
Will finish Your plane at the end of the week.
Yuri.
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Old Jun 27, 2012, 02:01 PM
Drinks Day Old Expired Milk
VooDoo Child's Avatar
United States, OR, Portland
Joined Aug 2010
2,833 Posts
Does the X wing not have a rear spar ? I am working on the wing,and looking at pics from Jacko and Lenny,and i amazed at how far back they have the servo wiring exiting.
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Old Jun 27, 2012, 04:01 PM
One Idiot is plenty...
Dbox's Avatar
Planet Earth
Joined Jun 2005
5,186 Posts
Quote:
Originally Posted by VooDoo Child View Post
Does the X wing not have a rear spar ? I am working on the wing,and looking at pics from Jacko and Lenny,and i amazed at how far back they have the servo wiring exiting.
There is a rear spar.
It splits right at the middle of the wing.
Yuri.
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Old Jun 27, 2012, 04:36 PM
Drinks Day Old Expired Milk
VooDoo Child's Avatar
United States, OR, Portland
Joined Aug 2010
2,833 Posts
Quote:
Originally Posted by Dbox View Post
There is a rear spar.
It splits right at the middle of the wing.
Yuri.
Darn,that means i have to pay attention when doing this hole
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Old Jun 27, 2012, 04:57 PM
200mph +
sykotic's Avatar
New Zealand, Manawatu-Wanganui, Palmerston North
Joined Sep 2010
931 Posts
Quote:
Originally Posted by VooDoo Child View Post
Darn,that means i have to pay attention when doing this hole
Not really, the drag/rear spar does not go through the middle of the wing section.

If you put the hole in the middle of the wing center you should be fine.
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