field charging lipos

field charging lipos Gallery slideshow

View related threads: (in this forum | in all forums)

Logged in as Guest

Users viewing this topic: none

Search This Thread

Printable Version

All Forums >> Electric Aircraft Universe >> Electric Pattern Aircraft >> field charging lipos

Page: [1]

Message

<< Older Topic Newer Topic >>

field charging lipos - 7/3/2012 8:52 PM

Rudy

Posts: 28
Score: 101
Joined: 5/25/2011
Last Login: 6/18/2013
From: SalemOR, USA
Status: offline

Hi all, I want to be able to charge my Lipo batteries at our field. We have no power there. 12v or 24v deep cycle batteries are what I want to use. I have a 730i Hyperion charger. I don’t want a genset, tough the portable power source stations are cool.

What works? And, how do you figure out how many batteries can charged from a deep cycle battery from a DC charger?

Rudy

Hide Signatures

Post #: 1

RE: field charging lipos - 7/3/2012 9:13 PM

shannah

Posts: 845
Score: 105
Joined: 9/6/2004
Last Login: 6/18/2013
From: placentia, CA, USA
Status: offline

I use an Optima Blue Top deep cycle battery. I get 2 full charges from it at the field, sometimes 3 if I don't run the packs down too far. It is small and relatively light. I have been using this battery since late 2007 and it is still going strong. The key is to have a good, intelligent, battery charger for it. The maintenance charge cycle is really, really important. I happen to charge mine off a Minn Kota charger. Don't use one of the auto store cheapo chargers. It will kill that battery. The charge cycle needs to have the multiple charge profiles that most intelligent chargers provide. I also sometimes charge it from my Iota 55 (when I am at a contest). I am not sure if the Iota has an equivalent charging profile to the Minn Kota. I also leave it connected in maintenance charge mode for a few days each week.

_____________________________

Team BJCraft

Hide Signatures

(in reply to Rudy)

Post #: 2

RE: field charging lipos - 7/3/2012 9:28 PM

gaRCfield

Posts: 6517
Score: 156
Joined: 5/20/2008
Last Login: 6/18/2013
From: Mason, OH, USA
Status: offline

I have a box with 3 chargers - 2 for power packs and one for Rx/Tx. We have power at the field, but truthfully, I rarely get more than 5 flights in a day. It would be easier to just have 5 fully charged packs and bring them to the field. I usually end up having to dis-charge something.

Of course it all depends on your routine. If I'm alone, 4 solo flights and I'm bored. If my friends are at the field, I end up chatting and get in about 4 flights between breaths.

Of course there are many ways to skin a cat, so do what you think will work best for you. My thoughts are that it is best to store lipos at a storage charge, and charge just before use. My opinion is that a 12v is just another battery to charge.

I have considered getting a 12v many, many times. Considered up to the point of walking into Walmart or Auto parts store, looking at the battery, picking it up, then putting it down and walking out. To me it's just not worth it. 5 packs charged is more than enough for now, and maybe one day I'll have a nice Japanese generator.

_____________________________

Joe Marri
Enjoying all things aviation.

Hide Signatures

(in reply to shannah)

Post #: 3

RE: field charging lipos - 7/3/2012 9:29 PM

Silent-AV8R

Posts: 4799
Score: 180
Joined: 3/16/2004
Last Login: 6/18/2013
From: Orange County, CA, USA
Status: offline

I'll add my +1 for the Optima method.
I don't always charge at the field, but when I do, I use an Optima.
I am the most interesting pilot in the world, or not

_____________________________

Be aware and prepared, or pay the price of ignorance.

Hide Signatures

(in reply to shannah)

Post #: 4

RE: field charging lipos - 7/3/2012 10:56 PM

pippy

Posts: 81
Score: 100
Joined: 1/9/2004
Last Login: 6/17/2013
From: Galway, IRELAND
Status: offline

Hi rudy, I have an extra car battery( 110Ah) in the back of my van wired into the charging circuit of the van through a special unit for that purpose. I can charge a number of packs at 5A with a cell pro 10s at the field if I want extra flights. If the car battery goes low I just start the engine and the voltage instantly goes up.

_____________________________

Paul Houlihan

Hide Signatures

(in reply to Rudy)

Post #: 5

RE: field charging lipos - 7/4/2012 10:14 AM

jclaude

Posts: 24
Score: 100
Joined: 9/29/2004
Last Login: 6/14/2013
From: , BELGIUM
Status: offline

Hi Rudy,

It's more easy to don't charge on field. Have 4 or 5 flying packs, charged at house, and let's go!

For training, buy chinese batteries. It's the cheapest way. I use them from two years without problem.

Blue skies,

Hide Signatures

(in reply to pippy)

Post #: 6

RE: field charging lipos - 7/4/2012 11:54 AM

cmoulder

Certified

Posts: 2769
Score: 106
Joined: 7/31/2006
Last Login: 6/18/2013
From: Ossining, NY, USA
Status: offline

quote:

ORIGINAL: gaRCfield

I have a box with 3 chargers - 2 for power packs and one for Rx/Tx. We have power at the field, but truthfully, I rarely get more than 5 flights in a day. It would be easier to just have 5 fully charged packs and bring them to the field. I usually end up having to dis-charge something.

Of course it all depends on your routine. If I'm alone, 4 solo flights and I'm bored. If my friends are at the field, I end up chatting and get in about 4 flights between breaths.

Of course there are many ways to skin a cat, so do what you think will work best for you. My thoughts are that it is best to store lipos at a storage charge, and charge just before use. My opinion is that a 12v is just another battery to charge.

I have considered getting a 12v many, many times. Considered up to the point of walking into Walmart or Auto parts store, looking at the battery, picking it up, then putting it down and walking out. To me it's just not worth it. 5 packs charged is more than enough for now, and maybe one day I'll have a nice Japanese generator.

Joe, I considered the weight and size - as well as the 'care and feeding' - of a deep-cycle marine battery and decided to go with the 1kw Honda generator. Good prices at WiseSales.com Some of the Yamahas are pretty quiet, almost as quiet as a Honda, but under no circumstances should you get a cheapo 2-cycle unit! Whatever you get, make sure it is capable of automatically raising and lowering the engine speed based on current demand.

_____________________________

Bob

Hide Signatures

(in reply to gaRCfield)

Post #: 7

RE: field charging lipos - 7/4/2012 1:47 PM

Anthony-RCU

Certified

Posts: 469
Score: 100
Joined: 1/9/2002
Last Login: 6/18/2013
From: Ossining, NY, USA
Status: offline

Did the marine battery battery thing for a few years and got tired of only charging one pack @1c at a time. If I had to do it over maybe I would get two so I could have 24v and more capacity.
Started with higher c charge rates at the end of last year and haven't looked back. Bought a Honda 2k and am very happy. I also bought a disconnect panel for the house to run my furnace or frig during outages to justify the cost.

Built a 24v ps from two HP 600 power supplies and use a fma 10 xp. I fly a lot after work so everything lives in my van and the first thing out of the car is the genie and the chargers. By the time I change my clothes and put the plane together my first pack is ready.

I hate listening to the gennie and they are expensive but I don't miss staying up at night babysitting packs and leaving charged packs in my car. Higher c packs really don't like to sit charged very long.

_____________________________

Anthony Romano
Team Airtronics, Team Castle Creations

Hide Signatures

(in reply to Rudy)

Post #: 8

RE: field charging lipos - 7/4/2012 2:34 PM

apereira

Posts: 1331
Score: 100
Joined: 6/30/2002
Last Login: 6/17/2013
From: Caracas, VENEZUELA
Status: offline

I have the same issue with power at the field, so I have six packs, fly all of them and then go home.
In the WC in Portugal, the electric guys had the car engines running all day long to power the charges during practices, it is simply easier to use the car than transporting bulky/heavy charger/batteries setup in my opinion. Chinesse batteries will work good to as JClaude suggested.

Hide Signatures

(in reply to Anthony-RCU)

Post #: 9

RE: field charging lipos - 7/4/2012 4:24 PM

Rudy

Posts: 28
Score: 101
Joined: 5/25/2011
Last Login: 6/18/2013
From: SalemOR, USA
Status: offline

Hey, thanks for all the solid replies. I pretty much knew the answer but more info solidifies the outcome. I have seven lipo’s to practice with but that isn’t enough practice time. I’m just getting into Pattern and I haven’t been flying very long either. Good fun and challenging to get it right and fly consistently. Oh Doctor, I’d like consistency. I’ll be at the district 8 Oregon Aerobatic Challenge in Molalla and see what others are using there this weekend.

Rudy

Hide Signatures

(in reply to apereira)

Post #: 10

RE: field charging lipos - 7/4/2012 8:58 PM

cmoulder

Certified

Posts: 2769
Score: 106
Joined: 7/31/2006
Last Login: 6/18/2013
From: Ossining, NY, USA
Status: offline

quote:

ORIGINAL: Rudy

Hey, thanks for all the solid replies. I pretty much knew the answer but more info solidifies the outcome. I have seven lipo’s to practice with but that isn’t enough practice time. I’m just getting into Pattern and I haven’t been flying very long either. Good fun and challenging to get it right and fly consistently. Oh Doctor, I’d like consistency. I’ll be at the district 8 Oregon Aerobatic Challenge in Molalla and see what others are using there this weekend.
Rudy

Welcome to Pattern, Rudy, and good luck at the contest!

Another advantage of having a field charging capability (whatever the power source) at a contest is that you can charge batteries for the next day while at the field and not have to babysit them in a hotel room while all of your buds are out hoisting brewskis!!

_____________________________

Bob

Hide Signatures

(in reply to Rudy)

Post #: 11

RE: field charging lipos - 7/4/2012 9:10 PM

VerneK

Posts: 250
Score: 100
Joined: 3/7/2005
Last Login: 6/18/2013
From: Livonia, MI, USA
Status: offline

To cut down on the generator noise, I carry a 25' extension cord with me and place the generator at the front bumper of my van with the exhaust pointing away. All of my flying, pit activity and so on is done from the rear of the van. It's amazing how much that reduces the aggravating sound of my Honda 1000w generator. My only personal rule on that is to put the generator back in the van the instant I shut it off, lest I forget about it and run over it.

Verne

quote:

ORIGINAL: Anthony-RCU

Did the marine battery battery thing for a few years and got tired of only charging one pack @1c at a time. If I had to do it over maybe I would get two so I could have 24v and more capacity.
Started with higher c charge rates at the end of last year and haven't looked back. Bought a Honda 2k and am very happy. I also bought a disconnect panel for the house to run my furnace or frig during outages to justify the cost.

Built a 24v ps from two HP 600 power supplies and use a fma 10 xp. I fly a lot after work so everything lives in my van and the first thing out of the car is the genie and the chargers. By the time I change my clothes and put the plane together my first pack is ready.

I hate listening to the gennie and they are expensive but I don't miss staying up at night babysitting packs and leaving charged packs in my car. Higher c packs really don't like to sit charged very long.

Hide Signatures

(in reply to Anthony-RCU)

Post #: 12

RE: field charging lipos - 7/4/2012 9:21 PM

cmoulder

Certified

Posts: 2769
Score: 106
Joined: 7/31/2006
Last Login: 6/18/2013
From: Ossining, NY, USA
Status: offline

Ha! Ditto exactly, Verne!

Only problem is, when it is in the front of the car it is so quiet I sometimes forget to turn it off when it isn't needed. But if it's that quiet, that's a good problem.

_____________________________

Bob

Hide Signatures

(in reply to VerneK)

Post #: 13

RE: field charging lipos - 7/4/2012 11:07 PM

Jason Arnold

Posts: 857
Score: 100
Joined: 8/21/2005
Last Login: 6/18/2013
From: Sydney, , AUSTRALIA
Status: offline

quote:

ORIGINAL: cmoulder

quote:

ORIGINAL: gaRCfield

I have a box with 3 chargers - 2 for power packs and one for Rx/Tx. We have power at the field, but truthfully, I rarely get more than 5 flights in a day. It would be easier to just have 5 fully charged packs and bring them to the field. I usually end up having to dis-charge something.

Of course it all depends on your routine. If I'm alone, 4 solo flights and I'm bored. If my friends are at the field, I end up chatting and get in about 4 flights between breaths.

Of course there are many ways to skin a cat, so do what you think will work best for you. My thoughts are that it is best to store lipos at a storage charge, and charge just before use. My opinion is that a 12v is just another battery to charge.

I have considered getting a 12v many, many times. Considered up to the point of walking into Walmart or Auto parts store, looking at the battery, picking it up, then putting it down and walking out. To me it's just not worth it. 5 packs charged is more than enough for now, and maybe one day I'll have a nice Japanese generator.

Joe, I considered the weight and size - as well as the 'care and feeding' - of a deep-cycle marine battery and decided to go with the 1kw Honda generator. Good prices at WiseSales.com Some of the Yamahas are pretty quiet, almost as quiet as a Honda, but under no circumstances should you get a cheapo 2-cycle unit! Whatever you get, make sure it is capable of automatically raising and lowering the engine speed based on current demand.

I'd go with the Honda generator too. Like others, I did the deep cycle battery thing for a while but carrying a big heavy battery around that only gave two 10s charges got tiresome. I now use the Honda with a 27V PSU to power my TP820CD. Works great and can easily charge at 2C (limited by my PSU) and as many times as I like. Often I will charge one pack at home in the morning and charge the rest at the field. Too easy.

BTW, don't waste your money with cheap generators. Buy a Honda. I've also heard that Yamaha generators are good too.

Cheers,
Jason.

Hide Signatures

(in reply to cmoulder)

Post #: 14

RE: field charging lipos - 7/5/2012 9:43 AM

john agnew

Posts: 2024
Score: 100
Joined: 1/29/2004
Last Login: 6/17/2013
From: glasgowScotland, UNITED KINGDOM
Status: offline

Rudy

Like most of the other guys I tend to go to the field with charged packs. I have a Cellpro 10XP and a 12V power supply at home to charge my packs. I have a 12V caravan battery 85amp/ hour which I take to the field with my Cellpro charger. As I only have two sets of 8S/10S packs I have to do some charging at the field, I charge at 9 amps and can charge a set in about 30 minutes assuming I have taken around 3000 mah out of the pack. I can get three charges out of the 12V battery before the voltage drops too low and the charge slows right down.I charge the 12V battery with a Hyperion charger which I replaced with my Cellpro and charge at 4amps. Hope this helps.

John

Hide Signatures

(in reply to Jason Arnold)

Post #: 15

RE: field charging lipos - 7/5/2012 9:14 PM

F.Imbriaco

Certified

Posts: 416
Score: 103
Joined: 7/27/2003
Last Login: 4/29/2013
From: lebanon, NJ, USA
Status: offline

Recently picked up a Wal-Mart 122 AMP Deep Cycle Marine Battery $81 w/ core credit, $9 more without . Made by Johnson Controls- a well respected company) and the plastic tub( $8) . They even put it in the vehicle and told me it's store policy not to accept a tip( which I offered). Have it behind my seat on the floor of my Odyssey and don't plan to move it as it is damn heavy- Johnson Controls sez 61 lbs. - it feels heavier.
So far, so good. I use a TP 820CD . I've charged two 10S bricks(5300 5S Gens Ace) , one brick at a time @ 2 AMP; once home and in the garage , attach my "Battery Tender" . After roughly 14-16 hrs., the charge was complete for that amount of usage.
I also fly e-UKIE Stunt and have charged four individual 5S 3300 Gens Ace @ 1AMP.

Haven't measured the limit of the battery just yet because after 4 flights in this heat, I wanna go for ice cream , a cold drink or just get home.

Down the road, I hope to wire it to my vehicle's altenator.

Hide Signatures

(in reply to john agnew)

Post #: 16

RE: field charging lipos - 7/6/2012 3:46 PM

smcharg

Posts: 327
Score: 110
Joined: 8/21/2010
Last Login: 6/17/2013
From: College Station, TX, USA
Status: offline

Hi guys,

I'm just curious why you say don't buy the 2-stroke cheapo generators. I have had one of the 800W generators for 2 years now powering a 50Amp power supply driving a Cellpro 10s and an XP at the same time and haven't had any issues. I agree 100% that Honda and Yamaha make great generators but when you walk in to Harbor Freight and see 800W for $89.95, it's hard to pass up. Is there an issue with these types i.e. dirty power or something? The thing gets awesome mileage and the worst part about the whole thing is having to mix the oil and gas but really, that's not a huge deal.

Thanks,

Scott

_____________________________

Scott McHarg

Hide Signatures

(in reply to F.Imbriaco)

Post #: 17

RE: field charging lipos - 7/6/2012 9:34 PM

Jason Arnold

Posts: 857
Score: 100
Joined: 8/21/2005
Last Login: 6/18/2013
From: Sydney, , AUSTRALIA
Status: offline

Hi Scott,

I can't speak from first hand experience with the cheapie two stroke generators but can say that people who did have them didn't use them for long. They seem to be noisy and as you point out, you have to mix the fuel. The cleanliness of the output is another possible issue as one person I know of did kill two power supplies. Often we run the scoring computer off the Hondas and have no issues. Down here, some guys are running the $300 cheapie four stroke generators. While they do seem to work ok, they are noisier than the Honda and often don't have an output at start-up which means turning it off and restarting until you do have output. They usually run like a hairy goat too.

I purchased the Honda 2000i some years ago and it's a fantastic unit. I can also run a full size refrigerator and water pump off it when we have a power outage at home. It's quiet and runs great. It usually starts first pull too....

At the end of the day, you generally get what you pay for.

Regards,
Jason.

Hide Signatures

(in reply to smcharg)

Post #: 18

RE: field charging lipos - 7/7/2012 2:49 PM

bdawg50

Posts: 44
Score: 100
Joined: 5/15/2003
Last Login: 6/12/2013
From: crosby, TX, USA
Status: offline

I have had the $85 gen for about four years now and have used it for fans, drills, hair dryer, coffee pot ,etc. I also know a few pattern fellows that are using it with no issue so thought I would do the same since I already had one. The first time I plugged my Cellpro power supply into it, it blew. I checked the voltage with my meter and the gen was putting out any where between 120v to 250v. It was spiking all over the place. There is no regulator on these things so it is governed by the RPM. So if you have a load on it or if the rpm is where it should be, you are getting away with it. I have heard some people using these are putting an inline voltage regulator on them, but those cost almost as much as the gen. Of course that would still be cheaper that the Hondas.

The good news is that my wife saw the thing pop and smoke so she said get the cheap thing out of the house and spend what ever you need to get a good one.

Allan

Hide Signatures

(in reply to Jason Arnold)

Post #: 19

RE: field charging lipos - 7/7/2012 4:58 PM

gaRCfield

Posts: 6517
Score: 156
Joined: 5/20/2008
Last Login: 6/18/2013
From: Mason, OH, USA
Status: offline

I am only considering a Japanese generator (Honda, Yamaha is also good) - most of the guys I see with them have them behind a van. I NEVER even notice them running until I need to go to my truck for something, walk around the corner, and see and hear it. I am always amazed at how quiet they are.

And, because I've asked a lot of questions and talked to a lot of people. I've heard of generators that work great the first year, and spend half their lives in small engine repair shops. Every day in this hobby I learn more and more to to buy the right thing, and buy it once. I'm tired of chasing problems I caused by trying to do something different or at a reduced cost.

I am sure I would use it at home - it would be really nice to have one for outdoor projects, extended camping trips, emergencies, etc. If I buy one, I don't want to wonder if it's going to start every time I go to use it.

_____________________________

Joe Marri
Enjoying all things aviation.

Hide Signatures

(in reply to bdawg50)

Post #: 20

RE: field charging lipos - 7/9/2012 2:00 PM

jhatton

Posts: 106
Score: 100
Joined: 9/22/2004
Last Login: 6/17/2013
From: Endicott, NY, USA
Status: offline

I have three generators, I found the honeywell 1000i generator while being a little louder than the honda puts out clean power at a good price point, that is the one I mostly use for field charging... When at a contest I also have my Onan 5500 in the RV, that gives lots of power for charging as well as running the AC to keep things cool. I also have a standard "contractor" type 6500 watt generator at the house that I use in the case of power outages when I need more power than the 1000 will put out... if you get an appropriate generator for the job you want it should work out for you. I found it nice to have the smaller generator for when I do not need lots of power than to pay for the gas in the larger ones... The smaller generator payed for itself by now in gas savings alone over running the big ones.

Hide Signatures

(in reply to gaRCfield)

Post #: 21

RE: field charging lipos - 7/9/2012 2:05 PM

rcpattern

Certified

Posts: 2660
Score: 100
Joined: 10/17/2003
Last Login: 6/12/2013
From: Great Mills, MD, USA
Status: offline

quote:

ORIGINAL: gaRCfield

I am only considering a Japanese generator (Honda, Yamaha is also good) - most of the guys I see with them have them behind a van. I NEVER even notice them running until I need to go to my truck for something, walk around the corner, and see and hear it. I am always amazed at how quiet they are.

And, because I've asked a lot of questions and talked to a lot of people. I've heard of generators that work great the first year, and spend half their lives in small engine repair shops. Every day in this hobby I learn more and more to to buy the right thing, and buy it once. I'm tired of chasing problems I caused by trying to do something different or at a reduced cost.

I am sure I would use it at home - it would be really nice to have one for outdoor projects, extended camping trips, emergencies, etc. If I buy one, I don't want to wonder if it's going to start every time I go to use it.

Joe,

Between the two, get the Yamaha. Having owned both the Yamaha and the Honda, and now own the 2000W Yamaha, it is slightly lighter and quieter. I also like that is has a fuel gauge on it. I've been VERY happy with my Yamaha. The Honda is good too, but I have been more impressed by the Yamaha,

Arch

_____________________________

Team Futaba, Castle Creations, Tech Aero Designs, Hacker Motors, F3A Unlimited, Team BJ Craft,

Hide Signatures

(in reply to gaRCfield)

Post #: 22

RE: field charging lipos - 7/9/2012 3:19 PM

Flyer88

Posts: 238
Score: 100
Joined: 1/20/2005
Last Login: 5/9/2013
From: CALGARY, AB, CANADA
Status: offline

Walmart sell a Regulated 2000watt Hyundai for $500 here in Canada . Ive been using one for the last two years with no problems.

It's the 62db low noise type with Eco mode so it runs a slow as possible for the given charge rate.

I charge anywhere from 10 - 15 amps, charge time 20-30 min

(and yes my gene is usually at the front of the truck also )

_____________________________

Why is there never enough time to do it right, but always enough time to do it over ?

Hide Signatures

(in reply to rcpattern)

Post #: 23

Page: [1]

All Forums >> Electric Aircraft Universe >> Electric Pattern Aircraft >> field charging lipos
Page: [1]

Jump to:

Charities we support that also need your help
Yorkie Rescue | Humane Society | ASPCA | Crohn's-Colitis America

1.375RCU1