RunRyder RC
WATCH
 1 page 2016 views POST REPLY
HomeAircraftHelicopterRadio - Servo - Gyro - Gov - Batt › What receiver Battery should I used??
01-18-2010 04:30 PM  8 years agoPost 1
cadwarrior

rrVeteran

Canada

My Posts: All  Forum  Topic

hi,

I have a raptor 90 (new to 90 size machine),

I had crashed it yesterday because (i think, not sure) of a receiver battery failure (voltage drop). I lost the signal when I was into a steady hoover at 12'' of the ground, no more response to cyclic, and the servos of the cyclic (ailerons and elevator) came into a back and left position resulting into a crash.

I have the following load into my helicopter:

-Throttle servo: Digital Futaba S3155
-Collective servo: Ace RC Digital DS 1015
-Ailerons servo: Futaba Digital S9451
-Elevator servo: Futaba Digital S9451
-Rudder servo: Futaba Digital S9254
-Gyro: Futaba GY401
-Governor: Revlock RL10
-Battery: 2cell Li-FePo 2200mah 6.4V with a voltage regulator

-Receiver: Futaba 2.4ghz FASST R617FS 7CH
-TX: Futaba 7C 2.4ghz FASST

after the crash, I had checked my battery and it was at 6.2V (at home), so maybe during the crash, it was lower than that due to the load of the servos and the low outside temperature (-8°C).

I am used with 4.8V for my 30 size heli, some peoples recommand to me to use a 7.4V lipo with my voltage regulator.

Is there lots of reported problem with a voltage regulator?, I never had that kind of issue with a 4.8V. less part, less problem. and a visual voltage indicator with the voltwatch.

I do not intend to do hard 3D with this machine, only inverted flying, loops and rolls.

thanks for helping!

Vincent

PM  EMAIL  Attn:RR  Quote
01-19-2010 03:37 AM  8 years agoPost 2
Ken Filloon

rrVeteran

Highland, Michigan

My Posts: All  Forum  Topic

What are you using for a voltage regulator?

PM  EMAIL  GALLERY  Attn:RR  Quote
01-19-2010 04:39 AM  8 years agoPost 3
koppter

rrApprentice

Virginia

My Posts: All  Forum  Topic

what is nominal voltage of your cells? 6.2 seems low for LiFe

PM  EMAIL  GALLERY  Attn:RR  Quote
01-19-2010 07:54 AM  8 years agoPost 4
Heli Davey

rrApprentice

springfield,mass

My Posts: All  Forum  Topic

I use an outrage 3600 2s rx lipo on my 6 & 700n!!!

*TREX 500ESP*TREX 600NSP*TREX 700N LE*

PM  EMAIL  GALLERY  Attn:RR  Quote
01-19-2010 01:25 PM  8 years agoPost 5
cadwarrior

rrVeteran

Canada

My Posts: All  Forum  Topic

My regulator is a fromeco
http://www.fromeco.org/Products/02F...00/Default.aspx

Here is the battery


6.4v

PM  EMAIL  Attn:RR  Quote
01-19-2010 04:32 PM  8 years agoPost 6
Ken Filloon

rrVeteran

Highland, Michigan

My Posts: All  Forum  Topic

Although your battery was close to a no fly voltage, I don’t believe you experienced a power loss. Most regulators will go into bypass mode if the voltage drops below their set voltage. Also your servos cranking in one direction would be indication of a signal interruption. I would fully charge your battery, check your antenna location (position) and do some range checks.

PM  EMAIL  GALLERY  Attn:RR  Quote
01-20-2010 01:33 AM  8 years agoPost 7
Helijamie

rrNovice

North Vancouver, British Columbia - Canada

My Posts: All  Forum  Topic

cadwarrior

It is possible you had a loss of signal fom the transmitter. Did you rebind once you had set up the cyclic servos? What were your failsafe servo positions? It is important to restablish all that once the CCPM is set up. Otherwise a failsafe position could really put the servos into weird positions.

I like Duralite and I am running a 2600mah 2 cell LiIon set up on my 600N. I think wih a 90 size I would go with a 5200mah set up. They have as nice choice of regulators, chargers, checkers, etc. The problem with LiIon is they can output 2C only. 5.2A is enough for me on a 50 size machine. I use 5.3V regulators so I do not need a step down on the tail servo.

Damn it Jim I'm a doctor not a flying monkey!

PM  EMAIL  GALLERY  Attn:RR  Quote
02-03-2010 07:56 PM  8 years agoPost 8
cadwarrior

rrVeteran

Canada

My Posts: All  Forum  Topic

It is possible you had a loss of signal fom the transmitter. Did you rebind once you had set up the cyclic servos? What were your failsafe servo positions? It is important to restablish all that once the CCPM is set up
As per the futaba 7C manual, the binding was correct. Should I rebind it even if everything works? the failsafe in helicopter mode on this TX is only for the throttle, so I did a test to shut down the switch on my Tx and see what happened on the servos,

only the throttle servo was moving in idle position when failsafe function activate. the cyclics servos did not moved when I closed the switch of my tx.

I spoke to a guy that got 2 raptor 90 (he was doing competition couples years ago), and he told me that a 4.8V is enough, no need for a volt regulator. (''keep it simple'', he told me).

Did one of you are using 4.8V into this large machine?, I have a brand new hydrimax 4200mah 4.8V, what do you think?

What should I read on my voltwatch when fully charged and moving both sticks quickly??, it is normal that it goes from fully green to red quickly? then came to a solid green once I stop playing with sticks?

PM  EMAIL  Attn:RR  Quote
02-04-2010 03:58 AM  8 years agoPost 9
jschenck

rrProfessor

La Vista, NE.

My Posts: All  Forum  Topic

I know from personal experience that LiFe packs in cold weather do loose capacity. I also have experience with LiFe packs going from 'running just fine' to complete shutdown and the resultant crash. LiFe packs are what I will continue to run but you can't use voltage as an indication of capacity. They go from 6.6V to nothing very fast.

6.2V on a resting LiFe pack = dead, completely discharged. I would not fly it with less than 6.6V.

If I were in your shoes and wanted to continue using the regulator I would buy a large Lipo RX pack, over 3000Mah for your Raptor-90.

PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 1 page 2016 views POST REPLY
HomeAircraftHelicopterRadio - Servo - Gyro - Gov - Batt › What receiver Battery should I used??
 Print TOPIC  Make Suggestion 

 3  Topic Subscribe

Tuesday, August 14 - 9:02 pm - Copyright © 2000-2018 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online