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Old 04-21-2007, 06:09 AM   #1186
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diha

If this is for a 3200 Lipo why set the capacity to 1500. I would say charge each cell with a setting on you charger for a single cell 3200 capacity. That should charge each cell to 4.2v It does not sound like you are using a Lipo charger ?
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Old 04-21-2007, 10:46 AM   #1187
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Quote:
Originally Posted by Steve B
diha

If this is for a 3200 Lipo why set the capacity to 1500. I would say charge each cell with a setting on you charger for a single cell 3200 capacity. That should charge each cell to 4.2v It does not sound like you are using a Lipo charger ?
Hi Steve B,

I am using a SuperNova Competition capable of charging Lipo.
For Lipo, I can only set the voltage to 3.7V / 7.4V.
Therefore for single cell, I set it to 3.7V & the capacity(variable) to 1500mAh so as not to overcharge the cell.
What setting would you recommend?
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Old 04-21-2007, 12:39 PM   #1188
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Yes 3.7v will be the nominal voltage of a single cell, but you still want to charge each cell up to the 3200 for balancing.
I dont know the SuperNova Competition charger but looking on the net it looks very similar to the Robitronic Overloader I have.
The charger should be running in CC-CV (constant current-constant voltage mode) for Lipos the charger will then charge each cell to 8.4v and then keep lowering the current to maintain the 8.4 volts this will give each cell there full charge and make them balanced (not as acurate has a balancer but when a fellow racer did this to his 3200 it did rebalance his cells). His went slightly out of balance because he discharged it to just above its limits).
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Old 04-22-2007, 06:31 AM   #1189
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Default Orion Avionics Advanced Charger

Does anyone know if the Avionics Advanced charger can also charge AA batteries in a radio, like the Spektrum DX3? If so, do I just put the charger in NiMH mode and set to maybe 1.0 amp charge rate? Will it charge the new Sanyo Eneloop batteries or the Rayovac Hybrid batteries?
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Old 04-22-2007, 09:05 AM   #1190
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Quote:
Originally Posted by Steve B
Yes 3.7v will be the nominal voltage of a single cell, but you still want to charge each cell up to the 3200 for balancing.
I dont know the SuperNova Competition charger but looking on the net it looks very similar to the Robitronic Overloader I have.
The charger should be running in CC-CV (constant current-constant voltage mode) for Lipos the charger will then charge each cell to 8.4v and then keep lowering the current to maintain the 8.4 volts this will give each cell there full charge and make them balanced (not as acurate has a balancer but when a fellow racer did this to his 3200 it did rebalance his cells). His went slightly out of balance because he discharged it to just above its limits).
Hi Steve B,

Thks for the advice. I discharge each cells individually & then charge it back again individually. Now I got them balance @ 4.1V each.
However, why shouldn't it be 4.2V each???
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Old 04-22-2007, 09:39 AM   #1191
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Default best charger

OK time to switch to lipo. Running 10.5 Novak BL with X-ray 007 chassis. What is the best size pack to buy that will fit and the best charger. Do I need a balancer and some type of a voltage cutoff? Using a LRP comp Sphere speedo.
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Old 04-22-2007, 11:03 AM   #1192
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Quote:
Originally Posted by fred kellner
OK time to switch to lipo. Running 10.5 Novak BL with X-ray 007 chassis. What is the best size pack to buy that will fit and the best charger. Do I need a balancer and some type of a voltage cutoff? Using a LRP comp Sphere speedo.

Your running the Comp. So it has a built in that you can turn on. Nexus Racing has a great how to on the 4800 lipo. If cost is not a factor go with it. It is weigths more. So you have less to add. The Ice and the Advantage will both work. Great if you still plan to run sub-c. The Orion flight charger is also a good choice. More lipo intended. You do not need a balancer if they do not get out of balance. Some guys have been running a 4800 wothout having to balance for a year now.
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Old 04-22-2007, 11:24 AM   #1193
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Our SWTour Oval Series is making plans to create a LIPO based class using this battery. One of the things we are looking for is parity between the speeds of the current motor classes we are now running. For those of you who don't know - we currently run 4 cell in most oval racing. So trying to create a new class structure using a 8+ volt LIPO pack to replace a 4.9+ volt NiMh pack can be quite a challenge.

NOVAK has helped us with this by building us test motors and we are currently testing a 17.5 turn motor. Here's a comparison from SATURDAYS Oval Race:

We held the 3rd event of the 07 SWTour Series at the newly reopened METRO R/C SPEEDWAY in Bakersfield CA. This 280 ft. HIGH Banked Concrete Tri-Oval is the only CAP tire short track in CALIF.

Test Pilot for todays run was JOSH SMITH - from Team KGB Racing.
Equipment: Peak/Orion 3200 Carbon Edition LIPO & NoVAK 17.5 B/L motor.
Car: KSG Gen2 Oval Car

Josh was put in the Stock Class for the first round of qualifying - although the motor looked really strong in the early practice runs.

In this first heat, with a calculation for gear ratio based on a number I created for this motor based on the known rollout for the 4300 times and gear ratio, Josh came out of the box with the following results.

56/5:02.54 Josh Smith

51/5:01.33 Tim Twyman

51/5:03.15 Dane Hopkins.

The 51 lap run of Tim Twyman was the actual stock TQ after the first run, and the 17.5 LIPO had it 5 laps down on it's maiden run.

Compare lap times (First 10 laps)

17.5 / STOCK

5.15 - 6.01

5.28 - 5.92

5.14 - 5.81

5.08 - 5.69

5.24 - 5.70

5.20 - 5.84

5.36 - 5.80

5.30 - 5.82

5.22 - 5.70

5.18 - 5.71



Last 5 laps



5.47 - 5.91

5.45 - 6.19

5.36 - 5.94

5.30 - 5.79

5.39 - 6.23

So it was obvious that the 17.5/LIPO was TOO HOT for Stock...once again.

So we moved JOSH to the 4300 class in the same round of qualifying...

Josh simply recharged the LIPO pack and had the car ready for the 4300 heat...which he won with his 58/5.03:25 to John Miles 57/5:03.00. After the first round Josh with his 17.5/Lipo was faster than the 4300 class TQ - Scot Petitclerc (Our last test pilot) which ran a 58/5:05.26

Here are some sample lap times between Josh and Scot.

First 10 laps of their 1st runs.

17.5 / 4300

5.13 - 5.27

5.13 - 5.19

5.14 - 5.36

5.06 - 5.12

5.07 - 5.15

5.11 - 4.96

5.14 - 5.05

5.25 - 5.33

5.08 - 5.12

5.07 - 5.10

And the last 5 laps

5.33 - 5.10

5.39 - 5.20

5.35 - 5.15

5.27 - 5.16

5.34 - 5.60


In the second round, Josh and the test motor picked up to a 58/5:02.87, but smokin Gary Hamilton stepped up the 4300 TQ time running a 60/5:01.44. Hamilton spent most of the race running high 4.8's and low 4.9's, while Smith was able to run a few 4.9's but spent most of his time in the 5.0 - 5.1 range.

The third round times almost mirrored round two, Hamilton stepped the TQ to a 61 lap run going 61/5:03.

Josh would qualify 4th in the 12 car field while Hamilton took the TQ spot.

In the main Josh pulled the tallest gear of the day, his times dropped off from 5.0's in the early runs to a consistant 5.2 from Lap 2 to the final lap on 57 with a handful of high 5.1's in the mix.

Hamiltons car also dropped a little speed in the main running mostly 4.9's and 5.0's with a 8 car field.

Smith's steady hand and collision avoidance ability let him beat Hamilton who got collected in a crash on lap 9. The hard charging Hamilton was able to pull of a 2nd place finish just 2 seconds behing Smith.

NOTE: Gary Hamilton pretty much OWNS the METRO track in Bakersfield. He's been the dominant MODIFIED driver and set the bar pretty high for the 4300/10.5 class as well. He spend a lot of time refining his setup and gearing for the 4300. Smith came in Saturday morning - I handed him the motor and told him where I wanted him to start the gearing, which is where it stayed most of the day. Smiths car seemed to have a slight push through the corners and I feel if we could have resolved that we would have seen his times equal those of Hamiltons. (Maybe we'll get Hamilton to do the next TEST w/ this motor) Josh also mentioned the balance of the car with the lighter lipo never felt quite right...and since the lipo is about 2/3rds the weight of a 4 cell pack we may have simply needed to add a couple oz's of lead weight to the LH side.
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Old 04-22-2007, 11:31 AM   #1194
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I just got my first Lipo and have a few questions With the Ice charger I have the Ams set to 3.2 but onece i start charging it never gets there. I will heara beep and then the charge lotage starts to drop. Is this normal? Are the packs sent fully charged or something? I dont want to screw up the battery.
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Old 04-22-2007, 01:16 PM   #1195
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Default 3200

What type of run time do you get with the 3200 Orion pack with a 10.5 brushless. Will they make 5 minutes? How long does it take to charge a 3200 at the recommended amp rate?
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Old 04-22-2007, 01:21 PM   #1196
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Quote:
Originally Posted by diha
Hi Steve B,

Thks for the advice. I discharge each cells individually & then charge it back again individually. Now I got them balance @ 4.1V each.
However, why shouldn't it be 4.2V each???
No need to discharge. Discharging to deep (below 80% discharge) could of been what put the cells out of balance.
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Old 04-22-2007, 01:22 PM   #1197
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Quote:
Originally Posted by fred kellner
What type of run time do you get with the 3200 Orion pack with a 10.5 brushless. Will they make 5 minutes? How long does it take to charge a 3200 at the recommended amp rate?
For 19 turn it takes me about 35 min. Should be less for a 10.5 BL I would think.
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Old 04-22-2007, 05:09 PM   #1198
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Quote:
Originally Posted by MrBlack
A couple of things:

1. Ripmax does not make out our charger I can assure you our charger is made by the same Korean manufacturer who makes roughly 60% of the chargers in the R/C industry.

2. Those with Ice/Yokomo/Checkpoint chargers please make sure to set the "max chg capa" at 90% or below. We are currently doing some testing but some feedback we have recieved has pointed to the fact that it goes up to 120% on Lipo and recommends using 110% and 105% which we believe can cause the battery to fail. I will post our final results on this as soon as they are in.

3. 2C charging is already here and will continue to progress to higher rates as technology progresses. Capacities will also go up while sizes will go down, the technology is there. It is just making it affordable while maintaining quality and reliability that is the hurdle.
Thanks mine was at 110% so I put it on 90%. Although my 4800s are prefect is it possible this is only with 3200 mah?
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Old 04-23-2007, 08:30 AM   #1199
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Quote:
Originally Posted by diha
Hi MrBlack,

Can you help to advise on this?

I once had in-balance on my cell after 5 charges.
Reading: 3.42V & 3.35V.
As i was on budget, I did not buy the balancer, so I charged each cell individually.

I set my charger at 1.7V; charge current 1.5A & charge capacity 1500mAh

Charge 1st cell & it stop at full capacity 1500mAh & voltage @3.85
Cahrge 2nd cell & manual stop the charging @ voltage 3.85, capacity @1612mAh.

Then I charge the the whole cell @ 1C & measure the voltage.
Reading: 4.16V & 4.28V.

Still in-balance & surprise that the 2nd cell was 4.28V. Any issue???
Can you advise what should I do next to have it balance.
Thanks in advance.
I am assuming you are talking about 3200 Orion Lipo's?

Is so you should be charging each cell @ 3.7V and 3200 mAh

If not and you where single cell balancing a 1500mAh cell then you still need the voltage set to 3.7 setting it to 1.7v could cause errors.

Are you checking the voltage with a Volt meter? Voltage checking via chargers is consistant however not 100% accurate.

If cells are out of balance and miss handled then it is possible to see a cell top out at 4.28 this is either the charger miss reading the voltage or the cell being over charged wich is damaging to the cell. Once the cells are belanced they wll not continue to top out at this voltage showing they are healthy once again. For those thinking this is a demon tweak to get more voltage you are sorely mistaken and will only destroy your cells trying to over clock them many times on the first attempt.
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Old 04-23-2007, 08:32 AM   #1200
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Quote:
Originally Posted by tcmerf
I just got my first Lipo and have a few questions With the Ice charger I have the Ams set to 3.2 but onece I start charging it never gets there. I will heara beep and then the charge lotage starts to drop. Is this normal? Are the packs sent fully charged or something? I dont want to screw up the battery.
The packs are sent roughly 90% charged from the factory depending on the time it took to get to your hobby shop through distribution and how long they were on the shelf this can very.

Your pack appears to close to that 90% charged range and this is why it does not begin charing at 3.2 and yes if you have a proper charger it will begin to ramp down in voltage once is gets close to fully charged.
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