Batteries

[asra]

quote:Originally posted by DellisI know this has been discussed before on the forum, I'm chasing the specs on the odeesy type battery or similar, that is suited to starting a EA 81, prerotating 29 foot blades and keeping all the electrical things running. Being situated in Gove , where can I by one? Dave EllisG'day Dave,Doesn't matter what sort of lead/acid battery you put in your gyro (or anything else for that matter), the level of discharge, the rate of the charge, and the level to which you recharge will all have a very large impact on the life of the battery. Life of batteries is often quoted in "cycles" (cycles being the number of times the battery will deliver its rated storage capacity in its lifetime.) Say for instance, your particular battery has a storage capacity of 10 amp hours. If its "life" is a 1000 cycles under certain discharge regime, then it is capable of delivering 1000 x 10 = 10,000 ah in its life time. Generally to get the 1000 cycles, you shouldn't discharge the battery more than 10%. If you were to discharge the battery to 30% regularly, then the life of the battery could easily drop to 300 cycles. If you regularly draw 50% of the storage, then the life could be well under 100 cycles.Forget the quantum of the figures above. For some batteries they will be correct, for others not. That is not important. What is important is that:

• the level to which you discharge your batteries
• the rate at which you recharge your batteries; and
• the level to which you recharge your batteries

WILL have an enormous impact on the life of the battery. If you are having trouble with battery life, make sure you address these issues for maximum life.RegardsFredBairnsdale

[asra]

quote:Originally posted by DellisI know this has been discussed before on the forum, I'm chasing the specs on the odeesy type battery or similar, that is suited to starting a EA 81, prerotating 29 foot blades and keeping all the electrical things running. Being situated in Gove , where can I by one? Dave EllisG'day Dave,Doesn't matter what sort of lead/acid battery you put in your gyro (or anything else for that matter), the level of discharge, the rate of the charge, and the level to which you recharge will all have a very large impact on the life of the battery. Life of batteries is often quoted in "cycles" (cycles being the number of times the battery will deliver its rated storage capacity in its lifetime.) Say for instance, your particular battery has a storage capacity of 10 amp hours. If its "life" is a 1000 cycles under certain discharge regime, then it is capable of delivering 1000 x 10 = 10,000 ah in its life time. Generally to get the 1000 cycles, you shouldn't discharge the battery more than 10%. If you were to discharge the battery to 30% regularly, then the life of the battery could easily drop to 300 cycles. If you regularly draw 50% of the storage, then the life could be well under 100 cycles.Forget the quantum of the figures above. For some batteries they will be correct, for others not. That is not important. What is important is that:

• the level to which you discharge your batteries
• the rate at which you recharge your batteries; and
• the level to which you recharge your batteries

WILL have an enormous impact on the life of the battery. If you are having trouble with battery life, make sure you address these issues for maximum life.RegardsFredBairnsdale

[asra]

Gentle Bodies,They are not new age, as I stated, just another generation, they are still SLA (Sealed Lead Acid) however, they do have a low internal resistance and the price is right, over in the West we have them in a 912 and EA81 and both have the same type of pre-rotator motors as I stated before, these batteries are performing well, as the Aircraft are being used on the same days and are doing around the same time it will be interesting to evaluate them over a period of time.I will aquire the make and the corresponding numbers that will suit our purposes, and if posible the agents in each state, like everything else, they are made in the cheap production countries, I have nothing against the Hawker or Gates batteries in general, they do have a very good discharge rate and are small and light for their performance however, I personaly have not recieved what I would consider even a reasonable life out of them, and the price............., that is why I looked around for a cheaper alternative.Batteries like most things are "Horses for Courses", the requirements for the 503 will naturally be different than that of the 912, and then there's the question of pre-rotation..........all the best.Pete Barsden

[asra]

Gentle Bodies,They are not new age, as I stated, just another generation, they are still SLA (Sealed Lead Acid) however, they do have a low internal resistance and the price is right, over in the West we have them in a 912 and EA81 and both have the same type of pre-rotator motors as I stated before, these batteries are performing well, as the Aircraft are being used on the same days and are doing around the same time it will be interesting to evaluate them over a period of time.I will aquire the make and the corresponding numbers that will suit our purposes, and if posible the agents in each state, like everything else, they are made in the cheap production countries, I have nothing against the Hawker or Gates batteries in general, they do have a very good discharge rate and are small and light for their performance however, I personaly have not recieved what I would consider even a reasonable life out of them, and the price............., that is why I looked around for a cheaper alternative.Batteries like most things are "Horses for Courses", the requirements for the 503 will naturally be different than that of the 912, and then there's the question of pre-rotation..........all the best.Pete Barsden

[Dellis]

Well I'm back, and and I have a machine left after all.Thanks for your efforts and the info fellas .The reason for going for an odeesy type battery was for a bit of weight saving initally , but I'm interested in the specs on the one that Pete is going to get back to us with.Otherwise, back to selling the dog.Dave Ellis Gove

[Dellis]

Well I'm back, and and I have a machine left after all.Thanks for your efforts and the info fellas .The reason for going for an odeesy type battery was for a bit of weight saving initally , but I'm interested in the specs on the one that Pete is going to get back to us with.Otherwise, back to selling the dog.Dave Ellis Gove

[asra]

Fred, spot onthe level to which you discharge your batteries the rate at which you recharge your batteries; and the level to which you recharge your batteries I recall the trouble we had with Recoms (recombination batteries) when they got below 1.8v per cell the ECG was straight lined, they were dead and any amount of recycling them was useless, Pete.Pete Barsden

[asra]

Fred, spot onthe level to which you discharge your batteries the rate at which you recharge your batteries; and the level to which you recharge your batteries I recall the trouble we had with Recoms (recombination batteries) when they got below 1.8v per cell the ECG was straight lined, they were dead and any amount of recycling them was useless, Pete.Pete Barsden

[asra]

quote:Originally posted by Pete BarsdenFred, spot onThanks Pete,Batteries are a bit of a passion. You should see my programmeable regulator. RegardsFred

[asra]

quote:Originally posted by Pete BarsdenFred, spot onThanks Pete,Batteries are a bit of a passion. You should see my programmeable regulator. RegardsFred

[asra]

quote:Originally posted by Pete BarsdenFred, spot onThanks Pete,Batteries are a bit of a passion. You should see my programmeable regulator. RegardsFred

[asra]

quote:Originally posted by Pete BarsdenFred, spot onThanks Pete,Batteries are a bit of a passion. You should see my programmeable regulator. RegardsFred

[asra]

Fred, go to bed!!! I don't want you to be cranky when you arrive here tomorrow!!!!Aussie Paul.www.firebirdgyros.com

[asra]

Fred, go to bed!!! I don't want you to be cranky when you arrive here tomorrow!!!!Aussie Paul.www.firebirdgyros.com

[asra]

Fred, go to bed!!! I don't want you to be cranky when you arrive here tomorrow!!!!Aussie Paul.www.firebirdgyros.com