3D Hobby Shop 71" AJ Slick - Build & Fly thread - Page 1826 - RC Groups
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Jan 11, 2013, 07:29 AM
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Manta1's Avatar
Quote:
Originally Posted by jetinteriorguy
I believe the 45 amp rating is at 120 volts or something like that. I know I read that somewhere, or it could have been 110 volts, whatever household current is I guess.
ya but you wanna know the weird thing about that? I'm gonna tell you anyhow lol.
I had to shorten the leads from my power supplies to my PL8 charger because the one set of power pole connectors melted one time. I shortened the leads and they now get hot if i charge at full tilt,but the housings dont melt. Never have had the connectors get hot on my planes tho,even when i ran 120 amps at wot in one one time. (lots of static run ups while feeling the connectors every now and again)
air circulating through the plane cool them ya think?
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Jan 11, 2013, 08:24 AM
Registered User
jsmith285's Avatar
Quote:
Originally Posted by Manta1
ya but you wanna know the weird thing about that? I'm gonna tell you anyhow lol.
I had to shorten the leads from my power supplies to my PL8 charger because the one set of power pole connectors melted one time. I shortened the leads and they now get hot if i charge at full tilt,but the housings dont melt. Never have had the connectors get hot on my planes tho,even when i ran 120 amps at wot in one one time. (lots of static run ups while feeling the connectors every now and again)
air circulating through the plane cool them ya think?
Think about it real good. I know people say they can run 100amps thru a 45PP. But we had to replace them on our PL8 also. Got to hot. Current is current. Nothing magical going on in the airplanes/ helis. Maybe air flow is greater, but 100 amps thru a 45 amp PP is hard for me to think its a good idea. 45 amp thru a PP on a PL8 gets to hot to touch, and its at 6s.
Jan 11, 2013, 09:18 AM
Barefoot Birkinsomething
rcbirk21's Avatar
Quote:
Originally Posted by jsmith285
Think about it real good. I know people say they can run 100amps thru a 45PP. But we had to replace them on our PL8 also. Got to hot. Current is current. Nothing magical going on in the airplanes/ helis. Maybe air flow is greater, but 100 amps thru a 45 amp PP is hard for me to think its a good idea. 45 amp thru a PP on a PL8 gets to hot to touch, and its at 6s.
all im saying is i think the higher voltage and the amps on the PL8 are a lot more stress on it. there is a ton of examples of very high amperage through the 45a pp's and they hold up very well
Jan 11, 2013, 09:25 AM
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Manta1's Avatar
Ya i just wonder if its the constant high amps versus the shorter bursts of rc. I have replaced the terminals and housings on my 89 slick once. This was after two airframes worth of flying tho. The connection got a bit loose. Esc unarmed once. All connectors that are connected and disconnected wear out tho. I will continue to use them tho until i find something better. Hate deans. Ec3 i like ok, bullets ok. APPs just rock right now for me. And shortening the leads made the connectors in my charger cooler so im golden there. I charged at 40 amps back to back the othet day with no problems. 2 sets if packs and i flew my 89 like 6 times in an hour
Jan 11, 2013, 09:26 AM
inverted-i-fly
3drcparts's Avatar
Quote:
Originally Posted by jsmith285
Think about it real good. I know people say they can run 100amps thru a 45PP. But we had to replace them on our PL8 also. Got to hot. Current is current. Nothing magical going on in the airplanes/ helis. Maybe air flow is greater, but 100 amps thru a 45 amp PP is hard for me to think its a good idea. 45 amp thru a PP on a PL8 gets to hot to touch, and its at 6s.
what connectors does Joe run?
Jan 11, 2013, 09:35 AM
Gone Huckin'
turnerm's Avatar
This is probably a really dumb question but keep in mind that I'm a bean counter... not an electrician.

If I konw that my setup is pulling ~60-70 Amps I would ASSUME that that is the amount of amps running through my APP connectors as well or no?
Jan 11, 2013, 09:40 AM
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Manta1's Avatar
Quote:
Originally Posted by turnerm
This is probably a really dumb question but keep in mind that I'm a bean counter... not an electrician.

If I konw that my setup is pulling ~60-70 Amps I would ASSUME that that is the amount of amps running through my APP connectors as well or no?
Well it wont go around the connectors majically lol
But if you ever look at a logger data you wld see law of averages apply. The highest amps the system pulls is gonna only happen at WOT, which we all know is a no no with these systems for more than 15 or so seconds at the time. So the system doesnt use those high amps long enough to let the connectors/wires get too hot. Is my line of thunk anywho.
Jan 11, 2013, 09:44 AM
Gone Huckin'
turnerm's Avatar
Quote:
Originally Posted by Manta1
Well it wont go around the connectors majically lol
But if you ever look at a logger data you wld see law of averages apply. The highest amps the system pulls is gonna only happen at WOT, which we all know is a no no with these systems for more than 15 or so seconds at the time. So the system doesnt use those high amps long enough to let the connectors/wires get too hot. Is my line of thunk anywho.
Yea... I knew that theoretically it was going through there. But the second part of your response is what I was after. So that's helpful.

And who says WOT for an extended period of time is a no no? LOL!
Jan 11, 2013, 09:47 AM
Registered User
jsmith285's Avatar
Quote:
Originally Posted by rcbirk21
all im saying is i think the higher voltage and the amps on the PL8 are a lot more stress on it. there is a ton of examples of very high amperage through the 45a pp's and they hold up very well
not arguing with you. Lots of people running lots of amps thru PP. I was just agreeing that 40 amps thru a 45 amp PP on a pl8 at 24 volts get the connectors really hot.
Jan 11, 2013, 09:52 AM
Gone Huckin'
turnerm's Avatar
Quote:
Originally Posted by jsmith285
not arguing with you. Lots of people running lots of amps thru PP. I was just agreeing that 40 amps thru a 45 amp PP on a pl8 at 24 volts get the connectors really hot.
My 3010B only goes up to 30 amps so I guess that's why I've never noticed it while charging. But you ARE making me nervous about flyign with them...
Jan 11, 2013, 09:53 AM
Registered User
jsmith285's Avatar
Quote:
Originally Posted by Inverted-I-Fly
what connectors does Joe run?
Currently (which means he is always looking and testing other connectors) his
batteries have deans on them. But his harnesses have a 75 amp PP in one of the legs to take the brunt of the spark.

He is testing some 150 and 200 amp connectors right know. Also trying different MM bullets.


Deans are adequate when used in single battery setups (even 6s). Multiple battery setups is where Deans are lacking in handling capacity.
It just seems some people prefer PP's because they dont have to solder them. Which is really why PP's are popular.
Jan 11, 2013, 09:54 AM
OOPS
Manta1's Avatar
Quote:
Originally Posted by jsmith285
not arguing with you. Lots of people running lots of amps thru PP. I was just agreeing that 40 amps thru a 45 amp PP on a pl8 at 24 volts get the connectors really hot.
It sure do and Ive not figured out why when ive not caught them hot on my plane?thats whats weird to me. But you right on they get hot from the pl8 to the power supplies
Now from the pl8 to the batteries one of that gets hot. That confuses me too. I can charge at 40 amps 2 6s 5000 packs and no wires even get warm. The packs are luke warm but thats usu from the flight
Jan 11, 2013, 09:55 AM
OOPS
Manta1's Avatar
Quote:
Originally Posted by Manta1
It sure do and Ive not figured out why when ive not caught them hot on my plane?thats whats weird to me. But you right on they get hot from the pl8 to the power supplies
Now from the pl8 to the batteries one of that gets hot. That confuses me too. I can charge at 40 amps 2 6s 5000 packs and no wires even get warm. The packs are luke warm but thats usu from the flight
Thats supposed to say none of them gets hot from charger to batts. Not one of them
Jan 11, 2013, 10:07 AM
Barefoot Birkinsomething
rcbirk21's Avatar
Quote:
Originally Posted by turnerm
Yea... I knew that theoretically it was going through there. But the second part of your response is what I was after. So that's helpful.

And who says WOT for an extended period of time is a no no? LOL!
also remember that when you put a fresh pack on and do a WOT burst check with a watt meter, that is the absolute max you will get because as the battery discharges, the amperage will also go down a bit
Jan 11, 2013, 11:44 AM
Sippin the Koolaid!
losifanatic's Avatar
I was using 45apps on my powerlab8. It melted 3 sets. Never been over 35amps pulling from the powersupplies. I switched to deans and my wire is no longer getting hot and the connector isn't melting any more. I was going to switch all my planes over to Andersons but not now. I am going to stick with deans


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