RunRyder RC
WATCH
 2 pages [ <<    <    ( 1 )     2     NEXT    >> ] 1894 views POST REPLY
06-26-2015 05:21 PM  4 years ago
Topic Vote0Post 1
jason46

rrVeteran

MI

MyPosts All Forum Topic
550 12s esc
Trying to figure out how much esc I need for a 550 with two 6s 3000mah packs. I calculate that it will be using roughly 45amps, could I get by with a 60amp HV esc, or is that asking too much of reality?
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
06-26-2015 06:02 PM  4 years ago
Aaron29

rrProfessor

USA

MyPosts All Forum Topic
45 amp average or peak?
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
06-26-2015 06:41 PM  4 years ago
jason46

rrVeteran

MI

MyPosts All Forum Topic
Average

60min/4min=15
15*3Ah=45

I figured worse case using 3000mah in 4mins.
Which is 2200watts of power
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
06-26-2015 06:52 PM  4 years ago
Michaelinpr

rrApprentice

Levitown, Toa Baja, Puerto Rico

MyPosts All Forum Topic
When I ran a 550 12s heli I used an 80 amp. Some have used the older Hobbywing 70HV. I wouldnt go any lower than that.
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
06-26-2015 06:58 PM  4 years ago
Aaron29

rrProfessor

USA

MyPosts All Forum Topic
If that's an average I'd really go with an 80.
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
06-26-2015 07:03 PM  4 years ago
raholek

rrVeteran

Zachary, Louisiana

MyPosts All Forum Topic
ESC choice
+1
When I ran a 550 12s heli I used an 80 amp. Some have used the older Hobbywing 70HV. I wouldn't go any lower than that.
A CC80 HV or a Jive 80 would give you plenty of overhead for peaks or a mechanical issue and not give you a fireball before you get to the ground.

If you are worried about size/weight, use the lite version of a castle. They are caseless and just require some ventilation. Mount it on the sideframe near the back. Plenty of cooling available in this position.

If it is a cost issue, buy a used Kontronik Jive 80. Can't go wrong with the big K.
www.redstickrc.net ama#: 968515
SHARE  PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
06-26-2015 07:13 PM  4 years ago
raholek

rrVeteran

Zachary, Louisiana

MyPosts All Forum Topic
By the way.
Which kit? We have a couple of pilots flying the Mikado 550 on 6s/12s on the JIVE and they love them. They just pull a pack and lower the headspeed with the old method of voltage control. Less Pack.

Good luck.
www.redstickrc.net ama#: 968515
SHARE  PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
06-26-2015 07:39 PM  4 years ago
dumbthumb75

rrApprentice

Oslo, Norway

MyPosts All Forum Topic
I use a Jive 80HV in my 12s TT X50. Works great.Diabolo, TDR, X50e, X50n, Raptor 50
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
06-26-2015 08:04 PM  4 years ago
jason46

rrVeteran

MI

MyPosts All Forum Topic
This is for a trex 550 so removing a battery would make it out of balance.

The lite versions of the castle HV speedos seem to be a bit rare.
The big K is out of my budget. I think it would be neat to see if a 60amp would work but I don't think I'm that brave.
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
06-26-2015 08:17 PM  4 years ago
Aaron29

rrProfessor

USA

MyPosts All Forum Topic
So little overhead for spikes on that setup. Too much is ALWAYS better than not enough when it comes to ESC's unless you like the smoke trail.
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
06-26-2015 08:46 PM  4 years ago
jason46

rrVeteran

MI

MyPosts All Forum Topic
Check this out

Watch at YouTube

SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
06-26-2015 09:01 PM  4 years ago
Aaron29

rrProfessor

USA

MyPosts All Forum Topic
I saw about 70 peak. Go with an 80 and never worry.

Or you could go 60 and just never bog. But that's pretty unrealistic.

Just flying around doing circuits is one thing. 3D is another. It might be ok for the former. But not the latter.
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
06-26-2015 09:02 PM  4 years ago
Climax

rrKey Veteran

West London, United Kingdom

MyPosts All Forum Topic
I built a 12S Trex 550 and use a Jive 80HV. They are expensive but you get a very good BEC and an awesome governor.

It works extremely well and I've never had an issue.
Electronics, Physics, Helicopters, Fixing Things...
SHARE  PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
06-30-2015 03:23 AM  4 years ago
raholek

rrVeteran

Zachary, Louisiana

MyPosts All Forum Topic
Budget Concerns
The big K is out of my budget.
How much do you have in your kit? To save $50 or $100 are you willing to have to re-kit a heli. Or just watch one burn up on the ground?
I understand that you are on a budget. See this at our field constantly. Watch new guys re-kit machines $600-$800 ea after getting a screaming deal on a slightly used ESC (that only shutsdown sometimes) or slightly used/crashed servos that are just too cheap to pass up. Something happens that they can't explain and unknown failures cause a good pilots to question their skills or build.

Don't risk it. Get quality stuff from someone you trust. Or buy new...just save a little longer to get something you trust.

Build your machines to last longer than til the next crash. You can learn better in the air than on the bench.

Good Luck.
www.redstickrc.net ama#: 968515
SHARE  PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
06-30-2015 04:07 AM  4 years ago
jason46

rrVeteran

MI

MyPosts All Forum Topic
It's cool buddy don't worry, I got an 85amp esc, I was only curious about the math.

I have a smaller Koby and I do enjoy it, but my old phoenix from 2009 flies perfectly fine.
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
06-30-2015 02:59 PM  4 years ago
Richardmid1

rrProfessor

Leeds, England

MyPosts All Forum Topic
It really depends on what HS you intend to run and how hard Continuously you fly.

I will point out that 4 mins flight time on a 12s 3000mah 550 setup is either setup wrong or you fly extremely hard and at extremely high head speeds?

So lets say worst case flight time is 4.5 mins. 80% of 3000mah is 2400mah used in 4.5 mins, thats 533mah/min or 32A average. (4 min flight time would still only be 36A average). So to answer the OP's question, a 60A ESC would be ample.

BTW decent esc's don't go up in smoke because they are being run hard, they would shut down from over temp so no worries.
60% of the time, it works every time!
SHARE  PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
06-30-2015 04:01 PM  4 years ago
don s

rrElite Veteran

Chesapeake, VA

MyPosts All Forum Topic
Won't 2x 3000 6S packs make a 550 a little porky?E820, Raptor G4N, X50F/E, E620, Forza 450, and some planks.
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
06-30-2015 07:27 PM  4 years ago
Michaelinpr

rrApprentice

Levitown, Toa Baja, Puerto Rico

MyPosts All Forum Topic
CG may be a little hard to get close.

On my X5 12s 550 stretch I only used 6s 2200's and still had to put the ESC on the rear of the frame to get it to CG out well. sure it is a different airframe but the principal is there.
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
06-30-2015 08:22 PM  4 years ago
Heli Fanatix

rrVeteran

Fountain Valley, CA

MyPosts All Forum Topic
I would suggest this setup:

Hobbywing 100A HV v3
- run GOV Store
- Use internal BEC with opti power ultra guard
6S 2600mah ~ 2700mah x 2
any 500~560kv motor

if you are swinging 553mm .. shoot for 2400 ~ 2600 HS with +/- 12 degrees and you should be good to go. should net you 5:30 flight times easily.
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
06-30-2015 09:08 PM  4 years ago
jason46

rrVeteran

MI

MyPosts All Forum Topic
Don, using a motor weighling 450ish grams and two 4cells weighing 433grams each the heli was tail heavy.
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 2 pages [ <<    <    ( 1 )     2     NEXT    >> ] 1894 views POST REPLY
 Print TOPIC  Make Suggestion 

 9  Topic Subscribe

Tuesday, July 23 - 5:46 am - Copyright © 2000-2019 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online