3D Hobby Shop 57" Extra 330 SC -Build Thread- - Page 767 - RC Groups
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Feb 13, 2013, 12:11 PM
Epoxy & CA Investor
DenverJayhawk's Avatar
Quote:
Originally Posted by Bigster
I finally got my 4315-714 bolted up with a 15x6 Xoar and the ICE was claiming ~80A peak (with a storage charged battery). I didn't have the connectors for my wattmeter yet, but holy cow, it nearly dragged me across the room!
Yeah. You'll love this. It's like a sling shot on takeoff. Kind of stupid vertical power, really.
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Feb 13, 2013, 12:12 PM
Gone Huckin'
turnerm's Avatar
Quote:
Originally Posted by DenverJayhawk
sounds low on the amp draw with that setup. I'm closer to 90amps with the same setup but a 15x10 prop.
Your 15x10 prop numbers make sense. I think with a 15x8 you'd get around 80-85.
Feb 13, 2013, 12:12 PM
Gone Huckin'
turnerm's Avatar
Quote:
Originally Posted by DenverJayhawk
Yeah. You'll love this. It's like a sling shot on takeoff. Kind of stupid vertical power, really.
Stupid indeed but MAN I love it.
Feb 13, 2013, 12:13 PM
Registered User
Quote:
Originally Posted by DenverJayhawk
i wouldn't trust a 75 amp esc with that motor on 4S. You'll definitely peak over 75amps given my experience with similar equipment.
A few people have been telling me that, but the data I'm getting isn't confirming it. I have a buddy I fly with who has the same setup, and his results are very similar to mine. I'll probably swap to a 100 just to be safe though.
Feb 13, 2013, 12:13 PM
Epoxy & CA Investor
DenverJayhawk's Avatar
Quote:
Originally Posted by turnerm
Your 15x10 prop numbers make sense. I think with a 15x8 you'd get around 80-85.
that makes sense. I should try a 15x8 sometime. I propped up for the elevation where i fly, which is generally about 5300-6000 ft.
Feb 13, 2013, 12:15 PM
Epoxy & CA Investor
DenverJayhawk's Avatar
Quote:
Originally Posted by timlake
A few people have been telling me that, but the data I'm getting isn't confirming it. I have a buddy I fly with who has the same setup, and his results are very similar to mine. I'll probably swap to a 100 just to be safe though.
well, if your watt meter is telling you that, then give it a go. You should be safe in theory.
Feb 13, 2013, 12:16 PM
Registered User
Quote:
Originally Posted by DenverJayhawk
maybe your throttle end points in the radio are limiting the range?
I've never messed with that... Are the default settings not good?
Feb 13, 2013, 12:21 PM
Yard Dart
Letzrock's Avatar
Quote:
Originally Posted by timlake
I've never messed with that... Are the default settings not good?
At WOT you should see a red light flicker on your ESC. The red light indicates full throttle has been reached by the ESC. I dont believe you can change much on your throttle with a DX6.
Feb 13, 2013, 12:22 PM
Gone Huckin'
turnerm's Avatar
Quote:
Originally Posted by DenverJayhawk
that makes sense. I should try a 15x8 sometime. I propped up for the elevation where i fly, which is generally about 5300-6000 ft.
If you're not pulling too many amps with the 15x10 then I'd just stick with that. I'm guessing you might be disappointed with the 15x8 at your altitude.
Feb 13, 2013, 12:31 PM
Registered User
Quote:
Originally Posted by Letzrock
At WOT you should see a red light flicker on your ESC. The red light indicates full throttle has been reached by the ESC. I dont believe you can change much on your throttle with a DX6.
I think the logged data also shows a "100" in the "power out" column when the ESC registers full throttle. Am I reading that right?

I'm also noticing a temporary 3v dip in voltage when I go from 0 to 100 on the throttle. Is this normal, or is my battery about to become a paperweight?
Feb 13, 2013, 12:39 PM
Epoxy & CA Investor
DenverJayhawk's Avatar
Quote:
Originally Posted by timlake
I've never messed with that... Are the default settings not good?
my radio had them defaulted at 100 and 100. I generally change the end points using Castle's instructions.
Feb 13, 2013, 12:51 PM
Gone Huckin'
turnerm's Avatar
Quote:
Originally Posted by DenverJayhawk
my radio had them defaulted at 100 and 100. I generally change the end points using Castle's instructions.
+1. Setup fixed end points per their instructions.
Feb 13, 2013, 01:51 PM
Yard Dart
Letzrock's Avatar
Quote:
Originally Posted by timlake
I think the logged data also shows a "100" in the "power out" column when the ESC registers full throttle. Am I reading that right?

I'm also noticing a temporary 3v dip in voltage when I go from 0 to 100 on the throttle. Is this normal, or is my battery about to become a paperweight?
A higher c rated battery helps this
Feb 13, 2013, 03:47 PM
I fly, therefore, I crash!!!
SteveT.'s Avatar
Quote:
Originally Posted by timlake
Wow... I wonder why I'm getting such different results? What kind of battery are you using?
A larger ESC will usually give you more power due to it having a lower internal resistance, and also, they usually have larger wires, so again lower resistance...

SteveT.
Latest blog entry: My hangar...
Feb 13, 2013, 03:50 PM
I fly, therefore, I crash!!!
SteveT.'s Avatar
Quote:
Originally Posted by Letzrock
At WOT you should see a red light flicker on your ESC. The red light indicates full throttle has been reached by the ESC. I dont believe you can change much on your throttle with a DX6.
He has end point adjustment, and that is what is needed to set up fixed end points. And yes, Fixed end points usually works best...

SteveT.
Latest blog entry: My hangar...


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