Espritmodel.com Telemetry Radio
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Old Apr 04, 2012, 01:05 PM
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Originally Posted by JohnathanSwift View Post
Uh, what do I do, now that I've driven off with the hose still attached!
Hope they didn't get your tag number.
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Old Apr 04, 2012, 01:05 PM
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Central California
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Originally Posted by NwRcFlight View Post
Poor example. Gas pumps have an auto cutoff. Even the non-computerized ones.

I'm not entering the fray. I've never had a problem with the charger. But I don't leave it on for more than 2-3 hours.
Your probably right on some level.Many of the fuel pumps I use have no auto shutoff so I guess its a matter of perspective.
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Old Apr 04, 2012, 01:08 PM
Bye Bye VP Aug 2010 - Aug 2012
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Originally Posted by jhroof View Post
It's best to use as many methods as you can. When I have a new plane, I choose a conservative flight time and measure the mAh put back in the battery during charge. I then increase the flight times in small increments until I get close the battery capacity. I also use the flight pack voltage telemetry mainly as a safety in case something goes wrong with the battery. It would also be nice to have a mAh telemetry readout as well. You can't have too much redundancy.
Yeah well, chargers on auto use voltage, not time or mAh. Voltage is the best indicator of charge state. I do what you do with flight packs though, except I'm not interested in mAh until I put it back on the charger.

Pretty shocking that some of the regulars in this thread are unable to look after a simple NmHi battery. I read the instructions and they were clear enough. Obviously, if I'm topping up, I'm not going to leave it on charge overnight. Are people really that bad at battery management that they can't adjust the charge length to the amount needed and judge the amount needed by looking at the volts?
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Old Apr 04, 2012, 01:10 PM
Bye Bye VP Aug 2010 - Aug 2012
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Originally Posted by JohnathanSwift View Post
Uh, what do I do, now that I've driven off with the hose still attached!
Was it not explained in the instruction manual?
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Old Apr 04, 2012, 01:10 PM
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Originally Posted by randall_l View Post
You sue the gas bar for not having an 'inactivity timer' of course. Lol!

I don't mean to stir the pot, but I'm getting some good laughs off this thread lately.

Thanks folks.

Cheers!
Randall
In California you would sue the guy that tightened your lugnuts as well as the wiper blade manufacturer.
Its always good to maintain a healthy sense of humor.
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Old Apr 04, 2012, 01:13 PM
Stop scaring my donkey!
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Originally Posted by Gerry__ View Post
Was it not explained in the instruction manual?
Um, it was vague and ambiguous: it said the gauge would go to full with premium, but didn't say anything about regular.
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Old Apr 04, 2012, 01:15 PM
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Originally Posted by JohnathanSwift View Post
Um, it was vague and ambiguous: it said the gauge would go to full with premium, but didn't say anything about regular.
You best start a poll about it.
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Old Apr 04, 2012, 01:25 PM
Stop scaring my donkey!
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Say, that's not an ethnic joke is it?
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Old Apr 04, 2012, 01:33 PM
EDF Junkie
Pacific Northwest
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Originally Posted by JohnathanSwift View Post
Uh, what do I do, now that I've driven off with the hose still attached!
Did you put the hose in the tank in the first place? That might not have been in the manual. And 20 gallons of gas just poured on the ground!!!
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Old Apr 04, 2012, 01:36 PM
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Originally Posted by grumpy42 View Post
This is a CRUCIAL caveat that is omitted from ANY documentation and apparently only recently has become the official word on the matter. The documentation merely states that the battery should not be left on the charger for more than 12h (and that is ONLY mentioned in the "Getting Started" guide). NOTHING is mentioned about the charge time needing to be proportional to the charge state. Fully charging the NiMH is an imprecise endeavour any way you slice it. You can only know how long to charge the DX8 if you know the TOTAL uptime (as far as I know there is no "system level" timer).

I don't think that it is unreasonable to expect "charge and forget" simplicity in a device that cost ~$400. It is a common concept that has been present in most consumer electronics for quite some time.

I personally consider the charging system to be a design flaw, but it is what it is, and I know how to work around it. However, the charging system will likely continue to befuddle new users since it is counter intuitive and not what users have become accustomed to.
Wow - those other radios are so superior in their design. For Example...

The more expensive and somewhat comparable Futaba 8FG:

From page 22 of the Users Guide -

* Battery charging will not automatically stop. Remove the battery and transmitter from the charger and the charger from the wall socket.

It also states -

1. Connect the "Special" charger to the wall socket (AC outlet).
2. Connect [...]
3. Remove the battery after 15 hours.

There are no mentions on charge time or handling other than suggested cycling.

Page 7 under warnings is interesting in its point that you should NOT rely on the radios warning systems...

For those who want to see the manual, go here > http://manuals.hobbico.com/fut/8fgs-2_4ghz-manual.pdf

The 8FG is about $100 more and has virtually the same instructions and method of battery charging. Note the bold quoted text above.

JC

ps - Go to page 34 of the DX8 manual to learn more about the alleged "missing system timer". Pay attention to the words "RESET" and "Internal".
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Old Apr 04, 2012, 01:39 PM
Stop scaring my donkey!
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Quote:
Originally Posted by JC Spohr View Post
Wow - those other radios are so superior in their design. For Example...

The more expensive and somewhat comparable Futaba 8FG:

From page 22 of the Users Guide -

* Battery charging will not automatically stop. Remove the battery and transmitter from the charger and the charger from the wall socket.

It also states -

1. Connect the "Special" charger to the wall socket (AC outlet).
2. Connect [...]
3. Remove the battery after 15 hours.

There are no mentions on charge time or handling other than suggested cycling.

Page 7 under warnings is interesting in its point that you should NOT rely on the radios warning systems...

For those who want to see the manual, go here > http://manuals.hobbico.com/fut/8fgs-2_4ghz-manual.pdf

The 8FG is about $100 more and has virtually the same instructions and method of battery charging. Note the bold quoted text above.

JC

ps - Go to page 34 of the DX8 manual to learn more about the alleged "missing system timer". Pay attention to the words "RESET" and "Internal".
Yeah, but where do I put the hose?

With gas near $5 a gallon for premium....

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Old Apr 04, 2012, 01:42 PM
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United States, IL, Glen Carbon
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Originally Posted by JohnathanSwift View Post
Yeah, but where do I put the hose?

With gas near $5 a gallon for premium....

Wrong manual...

And just because you cut the wire... juice will not flow out of it.
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Old Apr 04, 2012, 01:43 PM
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Rhode Island USA
Joined Aug 2010
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Quote:
Originally Posted by JC Spohr View Post
Wow - those other radios are so superior in their design. For Example...

The more expensive and somewhat comparable Futaba 8FG:

From page 22 of the Users Guide -

* Battery charging will not automatically stop. Remove the battery and transmitter from the charger and the charger from the wall socket.

It also states -

1. Connect the "Special" charger to the wall socket (AC outlet).
2. Connect [...]
3. Remove the battery after 15 hours.

There are no mentions on charge time or handling other than suggested cycling.

Page 7 under warnings is interesting in its point that you should NOT rely on the radios warning systems...

For those who want to see the manual, go here > http://manuals.hobbico.com/fut/8fgs-2_4ghz-manual.pdf

The 8FG is about $100 more and has virtually the same instructions and method of battery charging. Note the bold quoted text above.

JC

ps - Go to page 34 of the DX8 manual to learn more about the alleged "missing system timer". Pay attention to the words "RESET" and "Internal".
2 wrongs dont make a right.

VP
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Old Apr 04, 2012, 01:45 PM
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Canada
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Originally Posted by Gerry__ View Post
Voltage is the best indicator of charge state.
This is just not the case - especially with NiMH. Voltage will only tell you if the battery is depleted or fully charged (or "mostly" depleted/charged). Voltage will not tell you anything about the "intermediate" charge state. NiMH have a fairly flat discharge curve and will remain at their nominal voltage for approximately 80% of their use.

Without knowing the "charge state" of the battery coupled with a charger that does not terminate is BAD. This is why the current "best practice" is to perform a 10h charge when the battery is depleted.

Quote:
Originally Posted by Gerry__ View Post
Yeah well, chargers on auto use voltage, not time or mAh.
Actually, most NiMH chargers will use peak detection as a means of charge termination.
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Last edited by grumpy42; Apr 04, 2012 at 01:59 PM.
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Old Apr 04, 2012, 01:45 PM
Stop scaring my donkey!
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Originally Posted by JC Spohr View Post
Wrong manual...

And just because you cut the wire... juice will not flow out of it.
Actually, I think the guy running out of the door, screaming, said his name was Manuel.

I figured I must have taken a wrong turn into Florida cuz he keeps saying, "Sunny Beaches! Sunny Beaches!"
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