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E-flite . Next D . Fast Lad Performance

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Main Discussion > 7.4 Volts unregulated - Horizon Hobby update
 
 
BJames111
Elite Veteran
Location: Billings, Montana

no black box, that's for sure, but I'd bet money any electronics tech, will know what a burnt servo looks like when exposed to high voltage...I think Horizon is gearing up for something. Some kind of release about unregulated power system with li-po.

Brian James
Miniature Aircraft Fury Extreme
G-Force Heli
Elevated R/C
02-14-2008 04:09 AM
HOMEPAGE  
 
 
kogibankole
Senior Heliman
Location: albuquerque

are you kidding me...servos burn up all the time from running them off 4.8
02-14-2008 04:51 AM
 
 
BJames111
Elite Veteran
Location: Billings, Montana

I'm just being skeptical. Honestly, I don't know, I'm no electronics wizard!

Point of my post was to inform, that's it. On my heli, I won't be running straight li-po until the manufacturer gives the go ahead.

Brian James
Miniature Aircraft Fury Extreme
G-Force Heli
Elevated R/C
02-14-2008 04:59 AM
HOMEPAGE  
 
 
kogibankole
Senior Heliman
Location: albuquerque

then you wont be crackling the airframe anytime soon
02-14-2008 05:08 AM
 
 
BJames111
Elite Veteran
Location: Billings, Montana

no, I don't really have the skill for that

I was hoping to get a JR rep, or Horizon Employee to comment on this thread. I really thought they would be concerned about this contradictory information.

Brian James
Miniature Aircraft Fury Extreme
G-Force Heli
Elevated R/C
02-14-2008 02:47 PM
HOMEPAGE  
 
 
FBoss
Key Veteran
Location: Aurora Indiana USA

AirWolf.......What do you see as the advantages of running an 2sA123 RX system? I see, 1000's of cycles, No fire, Fast charging and $$ as the primary advantages, but how many flights on a 50 w/ 4x 9252s, 401 w/9254? Could you run that thru an Arizona Reg? I ask because Im building an 10sA123 system for my raven conversion (Tango 45-10 or (08), CC HV85) and am considering the RX power options. I like the Arizona reg BUT it specs only Lipo 7.4 power.........Comments Plez

The good ole times are now ,000132
02-14-2008 03:03 PM
 
 
MrMel
Elite Veteran
Location: Lidingo, Sweden

Quote 
What do you see as the advantages of running an 2sA123 RX system?

I can tell why I like it

10 minute charge time when you are on the way to the car and remember that you forgot to charge the battery.

(it works with the arizona perfectly)
02-14-2008 03:05 PM
 
 
AirWolfRC
rrProfessor
Location: 42½ N, 83½ W

FBoss, a question, are you trying to use a main pack, 10S for the motor, and a second 2S pack for the electronics ?

If so, you should be fine. The A123 cells have a lower voltage than LiPo and thus put a lesser demand on the regulator.

If not, use a capable (amps) switching regulator off the 10S pack and call it done.


The only down side of the A123 cells is they are heavier than LiPo and come in only a few sizes . . . . for now.
02-14-2008 03:25 PM
HOMEPAGE  
 
 
FBoss
Key Veteran
Location: Aurora Indiana USA

I was thinking of a seperate RX pack to give all the power from the 10s to the motor and in some ways a less complex system, though that is debatable.

The good ole times are now ,000132
02-14-2008 03:29 PM
 
 
FBoss
Key Veteran
Location: Aurora Indiana USA

So yes, Rx on a 2sa123. Making 10s out of dewalt packs. Think the 2s is a waste of time and weight?

The good ole times are now ,000132
02-14-2008 03:31 PM
 
 
9387ASH
Elite Veteran
Location: UK

del'd
02-14-2008 03:35 PM
 
 
AirWolfRC
rrProfessor
Location: 42½ N, 83½ W

FBoss, in the end, of course, it's up to you if you want a separate pack for the electronics or not.

If you do, any of the many regulators available for a 2S pack will work fine and a 2S 2300 A123 pack will give about 5 to 7 flights and you will still have to charge your 10S pack after every flight or two.

If you do not use a separate pack for the electronics, your regulator will be different, you will not have a separate 2S pack to charge and that's about it.
02-14-2008 03:48 PM
HOMEPAGE  
 
 
FBoss
Key Veteran
Location: Aurora Indiana USA

I have not found a regulator that will go from mid 30v to 5.1, Im sure they are out there, I just have not seen one.

The good ole times are now ,000132
02-14-2008 03:56 PM
 
 
AirWolfRC
rrProfessor
Location: 42½ N, 83½ W

UBEC, up to 40V input.
02-14-2008 04:11 PM
HOMEPAGE  
 
 
Funky Trex
Key Veteran
Location: Westerville, OH - USA

http://www.readyheli.com/Western_Ro.../wrl-hbechc.htm up to 45 volts

or

http://www.readyheli.com/Western_Ro.../wrl-hbechv.htm up to 60 volts
02-14-2008 04:15 PM
 
 
JKos
Elite Veteran
Location: City of California in the state of Maryland

Medusa Potencia and Dimension Engineering SmartBEC, SportBEC, and VHVBEC are also options.

- John

MSH Protos
02-14-2008 04:40 PM
 
 
FBoss
Key Veteran
Location: Aurora Indiana USA

Wow that was fast!! thanks guys Ill check em out. Just when I thought I had it all figured out!

The good ole times are now ,000132
02-14-2008 04:46 PM
 
 
MrMel
Elite Veteran
Location: Lidingo, Sweden

Quote 

JR (the manufacturer) and not Horizon (the distributor) quite categorically states that the servos where designed to work on 4.8V 4 cell NiCads. They do have a couple that were designed for 6V but these are typically for the RC car market.

JRradios.com lists the 8717 ok for 6v (5 cell nicad?)...
02-14-2008 07:28 PM
 
 
DS 8717
rrProfessor
Location: Here wishing i was somewhere else

The 8711,8611,8411,8311,8417,8317,and 8717 are all rated for 6v operation.
02-14-2008 07:41 PM
 
 
9387ASH
Elite Veteran
Location: UK

del'd
02-14-2008 07:42 PM
 
 
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Main Discussion > 7.4 Volts unregulated - Horizon Hobby update
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