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Old Jun 26, 2012, 03:07 AM
BulletMaster is offline
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Chillaxin dude!
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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, 10:30 AM
Lenny970 is offline
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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
Old Jun 26, 2012, 11:41 AM
johnnyrocco123 is offline
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You down with EPP?
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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.
Old Jun 26, 2012, 03:58 PM
Lenny970 is offline
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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
Last edited by Lenny970; Jun 26, 2012 at 09:16 PM.
Old Jun 26, 2012, 04:12 PM
drice is offline
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1/10C would be 25mA, or .025A.

Just saying...
Old Jun 26, 2012, 05:40 PM
johnnyrocco123 is offline
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You down with EPP?
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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.
Old Jun 26, 2012, 09:18 PM
Lenny970 is offline
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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
Old Jun 26, 2012, 10:07 PM
GregG is offline
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Speed Demon
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How thick can the wing servos be?
Old Jun 27, 2012, 12:24 AM
jackosmeister is online now
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DroneWorlds - TEAM NEW ZEALAND
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9mm
Old Jun 27, 2012, 01:09 AM
Dbox is online now
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One Idiot is plenty...
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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.
Old Jun 27, 2012, 10:24 AM
GregG is offline
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Speed Demon
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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.
Old Jun 27, 2012, 03:01 PM
VooDoo Child is offline
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Drinks Day Old Expired Milk
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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.
Old Jun 27, 2012, 05:01 PM
Dbox is online now
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One Idiot is plenty...
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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.
Old Jun 27, 2012, 05:36 PM
VooDoo Child is offline
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Drinks Day Old Expired Milk
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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
Old Jun 27, 2012, 05:57 PM
sykotic is offline
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200mph +
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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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