Fukuyama Batteries
#1051
Hi Dan,
I finally got my packs! They were wih the customs for some time.
The numbers of my race-packs look great! Thanks!
I will be using them this sunday and will let you know how they did!
I finally got my packs! They were wih the customs for some time.
The numbers of my race-packs look great! Thanks!
I will be using them this sunday and will let you know how they did!
#1052
Finally got to put my packs to use against someone other than myself tonight...truckloads of punch. I was a little slower (gotta get a new motor), but had the definite, measurable, advantage out of the tight corners. If only you guys sold anti-crash spray too...
Wahoo for Team Fuku
Dan- I'm still working on that thing. I'll keep you posted.
-dave
Wahoo for Team Fuku
Dan- I'm still working on that thing. I'll keep you posted.
-dave
#1053
DAn,
I have more discharging questions...
I discharged my pack on my 16x7 at 30 amps, and it stops right about 5.4 volts. If I hook up my volt meter to the pack, in less then 1 second after the load is removed, the pack is up over 7 volts.
Each cell is just about 1.2 volts. So I stick the pack on the tray, and let the blubs burn. Finally the first bulb starts to dim, and I read the voltage across that cell, and it reads about 9.5 volts. The second I take the blub out, WAM.. 1.2 volts.
If I let a cell get down to .4 volts With the load, it reads .9 withOUT the load. So where are these cells supposed to be?
.9 with 1.2 without?
or
.4 with .9 without?
I have more discharging questions...
I discharged my pack on my 16x7 at 30 amps, and it stops right about 5.4 volts. If I hook up my volt meter to the pack, in less then 1 second after the load is removed, the pack is up over 7 volts.
Each cell is just about 1.2 volts. So I stick the pack on the tray, and let the blubs burn. Finally the first bulb starts to dim, and I read the voltage across that cell, and it reads about 9.5 volts. The second I take the blub out, WAM.. 1.2 volts.
If I let a cell get down to .4 volts With the load, it reads .9 withOUT the load. So where are these cells supposed to be?
.9 with 1.2 without?
or
.4 with .9 without?
#1054
Tech Addict
Holycow
I would take th bulb off when the cell is 0.9 under load. They will ALWAYS pop back up to 1.2, they are supposed to do that.
Voltage is the potential, Current is the flow. You will always have voltage, just nothing behind it.
So they should be0.9 with the bulb in and 1.2 with it out.
If you unscrew the bulb when it goes out, it will come back up to 1.2. Wait a while and screw it back in, it will go out quite fast. The bulb only draws 1/4 to 1/2 amp. If one went out first, then the tray is doing what it should and your pack will perform better because all cells will be in unicen.
When I set up a 4 cyl bank of carbs on a motorcycle, the throttle comes nice and crisp because all are working together. Same thing with batteries.
David Root
Voltage is the potential, Current is the flow. You will always have voltage, just nothing behind it.
So they should be0.9 with the bulb in and 1.2 with it out.
If you unscrew the bulb when it goes out, it will come back up to 1.2. Wait a while and screw it back in, it will go out quite fast. The bulb only draws 1/4 to 1/2 amp. If one went out first, then the tray is doing what it should and your pack will perform better because all cells will be in unicen.
When I set up a 4 cyl bank of carbs on a motorcycle, the throttle comes nice and crisp because all are working together. Same thing with batteries.
David Root
#1055
Tech Adept
IR number
Maj. Teeth,
Got the batteries... they are great, picked up 2 laps!
Have a question, on the IR numbers is it Actual or Relative?
Thanks,
Dave
Got the batteries... they are great, picked up 2 laps!
Have a question, on the IR numbers is it Actual or Relative?
Thanks,
Dave
#1056
Originally posted by holycow
I have more discharging questions...
I discharged my pack on my 16x7 at 30 amps, and it stops right about 5.4 volts. If I hook up my volt meter to the pack, in less then 1 second after the load is removed, the pack is up over 7 volts.
I have more discharging questions...
I discharged my pack on my 16x7 at 30 amps, and it stops right about 5.4 volts. If I hook up my volt meter to the pack, in less then 1 second after the load is removed, the pack is up over 7 volts.
Each cell is just about 1.2 volts. So I stick the pack on the tray, and let the blubs burn. Finally the first bulb starts to dim, and I read the voltage across that cell, and it reads about .95 volts. The second I take the blub out, WAM.. 1.2 volts.
If I let a cell get down to .4 volts With the load, it reads .9 withOUT the load. So where are these cells supposed to be?
.9 with 1.2 without?
or
.4 with .9 without?
.9 with 1.2 without?
or
.4 with .9 without?
As NiMH cells discharge, they lose their ability to supply voltage under load, but not their ability to supply voltage open-circuit. When they get discharged, this is the kind fo behavior you can expect.
-dave
#1057
Re: IR number
Originally posted by schdp
Have a question, on the IR numbers is it Actual or Relative?
Have a question, on the IR numbers is it Actual or Relative?
-dave
#1058
schdp,
Its Relative.
Dan
Its Relative.
Dan
#1059
I compromised and took them down to .7 under load, and like 1. with no load. Ill take them down .9 on the blulbs from now on and ignore what they do afterwards.
#1060
Originally posted by holycow
I compromised and took them down to .7 under load, and like 1. with no load. Ill take them down .9 on the blulbs from now on and ignore what they do afterwards.
I compromised and took them down to .7 under load, and like 1. with no load. Ill take them down .9 on the blulbs from now on and ignore what they do afterwards.
Dan
P.S. Oh, that goes for all the Fukuyama owners.
#1062
I finally got a chance to build the two packs of cells (1.174v upgrade deal) that arrived two Sat's ago. Actually, I was just about to leave for a race that Sat when the Fedex guy pulls up and hands me the package from Fukuyama. That was some fast shipping !! I will be using the new batts for the first time this Sat. The only comparison I can make will be against my SMC cells but judging by the IR on the stickers the Fuku's should be much much better.
John Fontaine - this is Alvin, raced with you a few times at W.Chester and DC Ultra. Maybe I'll see you at W.Chester if you are going there this Sat.
John Fontaine - this is Alvin, raced with you a few times at W.Chester and DC Ultra. Maybe I'll see you at W.Chester if you are going there this Sat.
#1063
REMINDER
Hey Racers, Just wanted to remind you that you have only one more week until we end the "FREE SHIPPING" special and be entered in the DRAWINGS. We really appreciate your support and all the great testimonial statements and the great impact it has served to the R/C communities in whole.
Dan
Dan
#1064
Im gona have to get myself one more pack~! Have any 1.175 ish packs in stock? I want to take advantage of the free "upgrade" . How much (or which should I buy) to get me the best #s you can give out?
#1065
Tech Legend
iTrader: (51)
Join Date: Sep 2001
Location: Castle Mamba Max Pro. Feel its power!!!!!!!!!!
Posts: 21,220
Trader Rating: 51 (100%+)
John Fontaine I had to do it. I bought 3 packs 2 days ago and now I sold a few things and had some money in my Paypal account again so I had to do it. I ordered 3 more packs. Taking advantage of the free shipping and the free cell upgrade to 1.17 plus cells. That would give me 6 new packs for next weekend. Hell yea!!!!!!!!