power for engine and recvier
06-12-2015, 05:57 AM
#35
There is one more thought and that is if the ignition module should go bad and short it will drain the battery in no time. I also use the A123 packs with 2 leads from hang time hobbies and take my chances http://hangtimes.com/a123_batteries_for_giants_faq.html and the rcxel units with no issues.
06-12-2015, 07:37 AM
#36
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There is one more thought and that is if the ignition module should go bad and short it will drain the battery in no time. I also use the A123 packs with 2 leads from hang time hobbies and take my chances http://hangtimes.com/a123_batteries_for_giants_faq.html and the rcxel units with no issues.
While it is possible, I have never heard of an ignition module shorting though.
06-12-2015, 07:56 AM
#37
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Current limiting increases the internal resistance the source , reduces the performance of the ignition and limits the rpm it can perform.
A
06-12-2015, 08:22 AM
#38
Senior Member
I prefer OLIVE OIL, extra virgin, cold hard pressed, from Cretian oilves. The BEST there is, period! LOL
06-12-2015, 08:28 AM
#39
Senior Member
I'm outa here. Nuff said 'bout fat women. Like DB sez....Heck they need love too
06-12-2015, 01:22 PM
#42
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Yeah, sometimes there are things stated as fact in these threads that doesn't have ANY support in either actual measured DATA *or* anecdotal "evidence".
When you read those lines, you gotta realize that they AREN'T "golden nuggets", and more represent piled bat guano.
Shrug, then un-subscribe...and smile....
When you read those lines, you gotta realize that they AREN'T "golden nuggets", and more represent piled bat guano.
Shrug, then un-subscribe...and smile....
06-13-2015, 06:03 AM
#45
I don't quite understand the maintenance issues when using separate battery packs, its really no different from maintaining one pack... I use separate battery packs for the receivers and servo buss... and then another battery pak for the ignition system, along with an "Opti Kill Switch"... each with their own on / off switches... fromeco bager Switches, one each for the receivers & servo buss.... and a good quality std switch for the ignition system insulated from vibration as best as can be done.
Call me old school, but to me its just good practice to keep the ignition system separated and isolated from the radio gear... not because something bad is going to happen if you don't, its just a precaution; reduce the risks for interference or failure... one battery to power everything may work fine, but its not the use of one battery that concerns me, its all the electronic devices daisy chained together so you can use just the one battery... just to many potential points of failure for my liking... I may be just overly concerned, anything can fail at anytime, receivers, servos, switches, batteries, even plug / connectors can fail... so at some point you just have to throw caution into the wind, you've done the best you can do to protect your investments and make it as safe and reliable as possible.
John M,
Call me old school, but to me its just good practice to keep the ignition system separated and isolated from the radio gear... not because something bad is going to happen if you don't, its just a precaution; reduce the risks for interference or failure... one battery to power everything may work fine, but its not the use of one battery that concerns me, its all the electronic devices daisy chained together so you can use just the one battery... just to many potential points of failure for my liking... I may be just overly concerned, anything can fail at anytime, receivers, servos, switches, batteries, even plug / connectors can fail... so at some point you just have to throw caution into the wind, you've done the best you can do to protect your investments and make it as safe and reliable as possible.
John M,
Last edited by John_M_; 06-13-2015 at 06:09 AM.
06-13-2015, 07:08 AM
#46
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I don't quite understand the maintenance issues when using separate battery packs, its really no different from maintaining one pack... I use separate battery packs for the receivers and servo buss... and then another battery pak for the ignition system, along with an "Opti Kill Switch"... each with their own on / off switches... fromeco bager Switches, one each for the receivers & servo buss.... and a good quality std switch for the ignition system insulated from vibration as best as can be done.
Call me old school, but to me its just good practice to keep the ignition system separated and isolated from the radio gear... not because something bad is going to happen if you don't, its just a precaution; reduce the risks for interference or failure... one battery to power everything may work fine, but its not the use of one battery that concerns me, its all the electronic devices daisy chained together so you can use just the one battery... just to many potential points of failure for my liking... I may be just overly concerned, anything can fail at anytime, receivers, servos, switches, batteries, even plug / connectors can fail... so at some point you just have to throw caution into the wind, you've done the best you can do to protect your investments and make it as safe and reliable as possible.
John M,
Call me old school, but to me its just good practice to keep the ignition system separated and isolated from the radio gear... not because something bad is going to happen if you don't, its just a precaution; reduce the risks for interference or failure... one battery to power everything may work fine, but its not the use of one battery that concerns me, its all the electronic devices daisy chained together so you can use just the one battery... just to many potential points of failure for my liking... I may be just overly concerned, anything can fail at anytime, receivers, servos, switches, batteries, even plug / connectors can fail... so at some point you just have to throw caution into the wind, you've done the best you can do to protect your investments and make it as safe and reliable as possible.
John M,
06-13-2015, 11:42 AM
#47
Call it what you will DB ... I've been it this hobby a long time... I've learned from my own mistakes, others mistakes, and just general observations... the technology has come a long way, simplifying and making things possible we wouldn't have dreamed of 35-40 years ago... but that doesn't mean you take it for granted... when you look at the systems in real world aircraft, you don't just see one of anything that is a critical system!... there's backup system after back backup system... especially with the bigger aircraft,, the more complex the backup systems become... complexity can bring its own set of inherent issues, electronics can and do fail... not saying these little electronic wonders that we have at our disposal to make our lives a lot easier in this hobby are going to fail, but they can, and that's where the redundancy comes into play... so I look at this hobby is a similar light, you want the utmost reliability and safety features without a lot complexity... how safe and reliable do you think the B2 bomber would be if it only had one flight control computer and no backup system(s), I wouldn't even set foot inside it.
John M,
... I've been it this hobby a long time... I've learned from my own mistakes, others mistakes, and just general observations... the technology has come a long way, simplifying and making things possible we wouldn't have dreamed of 35-40 years ago... but that doesn't mean you take it for granted... when you look at the systems in real world aircraft, you don't just see one of anything that is a critical system!... there's backup system after back backup system... especially with the bigger aircraft,, the more complex the backup systems become... complexity can bring its own set of inherent issues, electronics can and do fail... not saying these little electronic wonders that we have at our disposal to make our lives a lot easier in this hobby are going to fail, but they can, and that's where the redundancy comes into play... so I look at this hobby is a similar light, you want the utmost reliability and safety features without a lot complexity... how safe and reliable do you think the B2 bomber would be if it only had one flight control computer and no backup system(s), I wouldn't even set foot inside it.John M,
06-13-2015, 12:49 PM
#49
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My last job was doing safety of flight tests on the 787 flight control computers. It has three. Even so they had manual backup. Not direct manual backup. You controlled the A/C with servos. Not unlike the way we fly our airplanes.
Remember full scale A/C fly for several hours at a time.
Our A/C fly for less than an hour and then are available for checking. Reliability specifications are stated as MTBF or mean time between failure.
Remember full scale A/C fly for several hours at a time.
Our A/C fly for less than an hour and then are available for checking. Reliability specifications are stated as MTBF or mean time between failure.
06-13-2015, 12:55 PM
#50
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OMG! Now we are to compare our toy's with the "real" big boys? Give me a break. I'll do it my way, uh huh-uh huh. And whom ever can do it however elsewise. I'm outta here!