RunRyder RC
WATCH
 3 pages [ <<    <     1     ( 2 )     3     NEXT    >> ] 2252 views POST REPLY
Home✈️Aircraft🚁HelicopterHelicopter Main Discussion › Can you take a look at my data?
12-16-2013 02:27 AM  5 years ago
Rotormaster

rrVeteran

Australia

MyPosts All Forum Topic
I understand what your saying about having extra RPM for head room, but that's not the issue. That's never been an issue when
running a flat line on my 450, or even my X5 when on 6S.... (Did I mention this thing is 12S?)

I tested it yesterday with a V curve (100, 96, 92, 96,100) and I could still make the rotor come to a halt just doing slow flips and rolls, so that's definitely not the issue.

I did make some changes to the motor settings in the ESC... Didn't help much either, so it's not that.
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
12-16-2013 03:12 PM  5 years ago
balsabasher

rrVeteran

Central Ohio, USA

MyPosts All Forum Topic
How is your power circuit resistance? Good solder joints, correct amp size wiring and connectors? What type of series battery connector? Do you have another set of batteries to try?Blades; what goes around, comes around!
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
12-16-2013 05:35 PM  5 years ago
wc_wickedclown (RIP)

rrProfessor

long beach calif

MyPosts All Forum Topic
editInsha Allah made in america
SHARE  PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
12-17-2013 08:13 AM  5 years ago
Rotormaster

rrVeteran

Australia

MyPosts All Forum Topic
I'm not too sure what you mean by power circuit resistance? I'm using EC5s all round, and I'm fairly sure the joints are just fine from tugging on them.

I do have another pair of 6Ss but I haven't soldered the connectors on them. On the last flight, all cells came down at around 3.85V, but toward the end of the flight the HS dropped so low that I though I had hit the LVC... My LVC point is at 3.8.
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
12-17-2013 01:19 PM  5 years ago
dkshema

rrMaster

Cedar Rapids, IA

MyPosts All Forum Topic
Is it just me, or is it that every helicopter you put together ends up having the same problem?-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
12-17-2013 02:58 PM  5 years ago
Rotormaster

rrVeteran

Australia

MyPosts All Forum Topic
No, not ALL. My 130x was fine... Ohh....

Don't worry, I don't think you're the only one to have caught on.

If I may ask, while I have your attention, do most LiPos tend toward lower power output during the 'break-in' period of their life? And if so, how drastic is the difference, in general?
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
12-17-2013 03:19 PM  5 years ago
balsabasher

rrVeteran

Central Ohio, USA

MyPosts All Forum Topic
Did I read this right? "My LVC point is at 3.8."
On a 3.7 volt cell?
Heck, try using your battery capacity! Try going to 3.3 LVC!
Btw, many mAhs are you putting back into the battery when you recharge them?
Blades; what goes around, comes around!
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
12-17-2013 03:25 PM  5 years ago
Rotormaster

rrVeteran

Australia

MyPosts All Forum Topic
Yeah, I'm trying to be gentle on the packs for break-in. Perhaps too gentle?

Edit: I haven't charged the pack from the last flight, and I can't remember in any precise terms how much I put back in the time before.
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
12-17-2013 07:30 PM  5 years ago
Pistol Pete

rrProfessor

Seffner, FL

MyPosts All Forum Topic
💎Sustaining Member
Post battery ripple data.~~Enjoying the hobby one flight at a time~~
SHARE  PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
12-18-2013 05:00 AM  5 years ago
Flyin for Jesus

rrVeteran

Troy, IL. 62294

MyPosts All Forum Topic
Alright... I finally viewed this thread on my PC and could see the flight log.

Pack voltage looks good, starting at almost 50V finishing at 46V with a few drops to just over 40V

Between 100 sec and 150 sec seems to be just a hover or easy flying... at 150 tach goes up so I assume ST1 there.

The only thing that looks odd it at the 230 sec mark... did you hit TH?
Pack voltage goes up, current and power drop and so does the HS.

When running 100% the entire flight, nothing here looks out of place... even hovering the entire pack, the HS will be highest when you start ( 50V pack voltage ) and the HS will be lowest when you land ( 46V pack voltage )

Are you really running a 2 pole motor?

My setup... I use the Governor... easiest way to go. I gear my heli for about 100 - 200 RPM over my ST2 ( really my max HS ) but I use something like 3.3V per cell. This way, I still have some headroom at max HS even on a battery that's about out of juice plus a little added voltage drop for high current draw situations. ( basically setup as 40V with my 12S setup )

My ESC temp is about 130F with this setup. HS is solid (2200 RPM ) and I get easily 7-8 minutes flight time on my 600 with 12S 3000mAh packs.
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
12-18-2013 05:13 AM  5 years ago
Flyin for Jesus

rrVeteran

Troy, IL. 62294

MyPosts All Forum Topic
Oops.. just looked, you have a 8 pole motor, made for a 600 - 700 size heli. ( is that right? go by the rotor, not stator? )
ESC timing set to 5 Deg, and 8K Hz frequency... I guess double check your setup.
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
12-24-2013 03:09 PM  5 years ago
Rotormaster

rrVeteran

Australia

MyPosts All Forum Topic
Alright, I have finally solved the issue.

I was looking through the graphs over the weekend, and suddenly I realised that the problem was quite literally staring me in the face.
You might recall me stating that I had the LVC set to 3.8V per cell.... now, if you look at the first graph i posted, around 186 seconds in, you can see that the voltage drops to 42.9V, which, devided by 12 equals around 3.5V.
So basically, every time I pushed a little too hard, the voltage would drop to the point where at least one of the 12 cells would dip below the 3.8V threshold, and thus trigger the ESC to initiate the soft cutoff.

I promptly lowered the LVC cutoff point down to 4.4V, and went out to test it. The power did not ramp down once in the entire flight. Looking at the graph of this flight, you can still see the same 2700W peak as previously, but the telling part is the average wattage.

Thanks all for the help.

SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
12-24-2013 03:25 PM  5 years ago
dkshema

rrMaster

Cedar Rapids, IA

MyPosts All Forum Topic
UH -- Balsabasher, four posts above your last one. Did you read it before having your epiphany?-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
12-24-2013 03:34 PM  5 years ago
Rotormaster

rrVeteran

Australia

MyPosts All Forum Topic
That post is edited. ??
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
12-24-2013 06:54 PM  5 years ago
balsabasher

rrVeteran

Central Ohio, USA

MyPosts All Forum Topic
Rotormaster, you are welcome. Merry Christmas.Blades; what goes around, comes around!
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
12-24-2013 08:15 PM  5 years ago
Flyin for Jesus

rrVeteran

Troy, IL. 62294

MyPosts All Forum Topic
I was getting close... I said,"The only thing that looks odd it at the 230 sec mark... did you hit TH?
Pack voltage goes up, current and power drop and so does the HS.
"

That was not TH... it was ESC LVC.
I just want .001% of the credit. LOL
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
12-24-2013 08:33 PM  5 years ago
dkshema

rrMaster

Cedar Rapids, IA

MyPosts All Forum Topic
That post is edited.
Afraid not, It's been sitting like that ever since BB put it up there.
-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
12-24-2013 11:11 PM  5 years ago
balsabasher

rrVeteran

Central Ohio, USA

MyPosts All Forum Topic
Fourth post down on this page. Second statement by Rotormaster;

"I do have another pair of 6Ss but I haven't soldered the connectors on them. On the last flight, all cells came down at around 3.85V, but toward the end of the flight the HS dropped so low that I though I had hit the LVC... My LVC point is at 3.8."
Blades; what goes around, comes around!
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
12-25-2013 01:22 PM  5 years ago
Rotormaster

rrVeteran

Australia

MyPosts All Forum Topic
Afraid not, It's been sitting like that ever since BB put it up there.
Sorry, your post was a little obfuscated in its address... Four posts up from BalsaBasher's last post was WC's, which is indeed edited, so I'm still not sure what you were trying to say.

But thanks anyway.
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
12-25-2013 01:29 PM  5 years ago
Rotormaster

rrVeteran

Australia

MyPosts All Forum Topic
I was getting close... I said,"The only thing that looks odd it at the 230 sec mark... did you hit TH?
Pack voltage goes up, current and power drop and so does the HS."
That was not TH... it was ESC LVC.
I just want .001% of the credit. LOL
Lol.

By the way, I'm pretty sure that at 230 I simply switched it back to normal mode. The HS was being slowly ramped down and I wasn't sure how to dealb with it, so I just switched it down to ease the load.
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 3 pages [ <<    <     1     ( 2 )     3     NEXT    >> ] 2252 views POST REPLY
Home✈️Aircraft🚁HelicopterHelicopter Main Discussion › Can you take a look at my data?
 Print TOPIC  Make Suggestion 

 6  Topic Subscribe

Wednesday, October 16 - 12:05 am - Copyright © 2000-2019 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online