New batt first cycle

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Author Topic: New batt first cycle  (Read 982 times)

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Reply #40
Offline pilot_jimbo wrote New batt first cycle on November 24, 2011, 00:24:58 AM
Slight change of direction here. I'm considering getting an accucel 6 to take with me to the slope and check/top up charge batteries as I need. Si the mains input not needed.

Does it come with a cigarette lighter to accucell lead?

Is it a Good idea?

Thanks.

Jimbo.

.......... http://www.slopeflyer.org  .......................

Reply #41
Offline Yoyo wrote New batt first cycle on November 24, 2011, 00:28:39 AM
Does it come with a cigarette lighter to accucell lead?

Is it a Good idea?

Mine came with a two banana plugs to Accucell (hollow DC plug) lead. I bought a cigarette lighter plug with two banana plug sockets in it from EBay but there's no reason not to make a lead up.

I often have a plane charging in the boot on the way to the slope, can't see why not.

The Accucell has a low input voltage cutoff so you can avoid killing the car if you're charging with the engine off.

Oh, hang on - it isn't 'fly it like you borrowed it, land it like you stole it', is it!
So that's where I've been going wrong...

Reply #42
Offline pilot_jimbo wrote New batt first cycle on November 24, 2011, 01:01:53 AM
Have you ever charged whilst static and flattened the battery? The mrs wouldn't want me to get stuck at the slope :)

.......... http://www.slopeflyer.org  .......................

Reply #43
Offline Yoyo wrote New batt first cycle on November 24, 2011, 01:06:31 AM
Have you ever charged whilst static and flattened the battery? The mrs wouldn't want me to get stuck at the slope :)

No, and TBH with slope soarers I don't think you would. It's big flight packs that do it.
 

Oh, hang on - it isn't 'fly it like you borrowed it, land it like you stole it', is it!
So that's where I've been going wrong...

Reply #44
Online tomkfly wrote Re: New batt first cycle on November 24, 2011, 08:48:01 AM
Mine came with a two banana plugs to Accucell (hollow DC plug) lead. I bought a cigarette lighter plug with two banana plug sockets in it from EBay but there's no reason not to make a lead up.

I often have a plane charging in the boot on the way to the slope, can't see why not.

The Accucell has a low input voltage cutoff so you can avoid killing the car if you're charging with the engine off.
I think, by the time the low battery cut off comes into play, there wont be enough power left to turn over a car engine.

 Tom

When you change the way you look at things, the things you look at often change.        www.deesidemac.co.uk

Reply #45
Offline Yoyo wrote Re: New batt first cycle on November 24, 2011, 08:59:38 AM
I think, by the time the low battery cut off comes into play, there wont be enough power left to turn over a car engine.

You can set the cutoff level to whatever you like, IIRC.

But admittedly if you think it's likely to be an issue you can fit a caravan style leisure battery in parallel. Not only will that save your car but it will be better at coping with being mostly drained from time to time.


Oh, hang on - it isn't 'fly it like you borrowed it, land it like you stole it', is it!
So that's where I've been going wrong...

Reply #46
Offline bobt wrote Re: New batt first cycle on November 24, 2011, 09:58:37 AM
In the early days of el*ctr*c flight, we had one guy in the club who was all elec. I drove past the field late one evening and saw his car still there, although it was almost dark. I called in, and there he was, flat battery, no mobile, and a 3 mile walk to the nearest phone booth... As he was quite disabled, only able to walk a few yards, it was a bit of a problem for him, and a good job I drove past!

wheres my pit b1tch?

Reply #47
Online satinet wrote Re: New batt first cycle on November 24, 2011, 10:07:05 AM
I don't think there is really a need to top up batteries on most slopers. It depends on how long you fly (and how (plus other factors like binding servos)), but I would get a charger that does both 240v and can charge in the field if field charging something you want. 

Certainly with big scalies where you could maybe have to large sub c packs, you should have long flight times.
The ones that do drain the batteries fairly quickly are small models with a lot of servos (e.g 60 inch mouldies).  Things like foamies you can fly for days on a AA battery with only 2 servos.

It's not like electrics fliers which need chargers that can delivery large current to big battery packs.  I doubt you will need something that can charge at more you could get out of the plug at home.

what you can do is run your charger off a 3s lipo, which is a lot lighter to lug around than a lead acid battery and doesn't require access to the car bonnett


Reply #48
Offline Roger wrote Re: New batt first cycle on November 24, 2011, 23:16:45 PM
I don't think there is really a need to top up batteries on most slopers. It depends on how long you fly (and how (plus other factors like binding servos)), but I would get a charger that does both 240v and can charge in the field if field charging something you want. 

Certainly with big scalies where you could maybe have to large sub c packs, you should have long flight times.
The ones that do drain the batteries fairly quickly are small models with a lot of servos (e.g 60 inch mouldies).  Things like foamies you can fly for days on a AA battery with only 2 servos.

It's not like electrics fliers which need chargers that can delivery large current to big battery packs.  I doubt you will need something that can charge at more you could get out of the plug at home.

what you can do is run your charger off a 3s lipo, which is a lot lighter to lug around than a lead acid battery and doesn't require access to the car bonnett
Like the idea of a 3s lipo to charge from, do you use anything to stop dischaging the Lipo to much, or just use common sense?


Reply #49
Offline Yoyo wrote Re: New batt first cycle on November 24, 2011, 23:21:28 PM
Like the idea of a 3s lipo to charge from, do you use anything to stop dischaging the Lipo to much, or just use common sense?

Use the charger low input voltage cutoff - LiPos shouldn't be taken below 3.7V per cell if you want them to last, so that's a cutoff of 11.1V. That should give you about 90% used, much more than that and you can start damaging the cell.

Oh, hang on - it isn't 'fly it like you borrowed it, land it like you stole it', is it!
So that's where I've been going wrong...

Reply #50
Offline pilot_jimbo wrote New batt first cycle on November 24, 2011, 23:30:55 PM
I don't think there is really a need to top up batteries on most slopers. It depends on how long you fly (and how (plus other factors like binding servos)), but I would get a charger that does both 240v and can charge in the field if field charging something you want. 

Certainly with big scalies where you could maybe have to large sub c packs, you should have long flight times.
The ones that do drain the batteries fairly quickly are small models with a lot of servos (e.g 60 inch mouldies).  Things like foamies you can fly for days on a AA battery with only 2 servos.

It's not like electrics fliers which need chargers that can delivery large current to big battery packs.  I doubt you will need something that can charge at more you could get out of the plug at home.

what you can do is run your charger off a 3s lipo, which is a lot lighter to lug around than a lead acid battery and doesn't require access to the car bonnett
I'm think more along the lines of charging the nyx. 6 digitals and a 2000 eneloop isn't going to last long with camber and snap.

In the vortex and asw20 I have a 3800, so I should be good for longer, and generally 2hrs with the vortex is enough, it keeps the adrenaline pumping that's for sure.

I've bought an accucell for topping up in the car, my a4 has a big battery, I know I had to buy a new one.


.......... http://www.slopeflyer.org  .......................

Reply #51
Online satinet wrote Re: Re: New batt first cycle on November 25, 2011, 08:43:43 AM
I'm think more along the lines of charging the nyx. 6 digitals and a 2000 eneloop isn't going to last long with camber and snap.

In the vortex and asw20 I have a 3800, so I should be good for longer, and generally 2hrs with the vortex is enough, it keeps the adrenaline pumping that's for sure.

I've bought an accucell for topping up in the car, my a4 has a big battery, I know I had to buy a new one.

Jimbo I've had many 3m mouldies like your nyx. The flight times will be in the hours. no harm in tipping it up but it won't go flat that easily.

Get a proper charger with an lcd display then you can see how much a flying session is taking out of the batts. Especially if you user a timer on your tx.


Reply #52
Offline pilot_jimbo wrote New batt first cycle on November 26, 2011, 20:55:35 PM
Mine came with a two banana plugs to Accucell (hollow DC plug) lead. I bought a cigarette lighter plug with two banana plug sockets in it from EBay but there's no reason not to make a lead up.

I often have a plane charging in the boot on the way to the slope, can't see why not.

The Accucell has a low input voltage cutoff so you can avoid killing the car if you're charging with the engine off.
Do you have a link For a manual, nothing with mine.

.......... http://www.slopeflyer.org  .......................

Reply #53
Online tomkfly wrote Re: New batt first cycle on November 26, 2011, 22:13:28 PM

When you change the way you look at things, the things you look at often change.        www.deesidemac.co.uk
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