RunRyder RC
 9  Topic Subscribe
WATCH
 2 pages [ <<    <    ( 1 )     2     NEXT    >> ] 732 views POST REPLY
HomeAircraftHelicopterRadio - Futaba FASST › Futaba R6014FS Receiver Voltage?
05-06-2018 12:27 AM  47 days agoPost 1
wjvail

rrKey Veteran

Meridian, Mississippi

My Posts: All  Forum  Topic

Hey all. I'm trying to put a few pieces laying around my shop back into service. I've got a Futaba R6014FS I'd like to put in a 1/3 scale Pitts I built 20+ years ago. I've bought new high voltage servos and I'd like to run the plane on a straight 2S LiIon.

The question is, can I run this receiver on 8.4 volts? Most of what I've read says 6.0 volts. The literature for the receiver would seem to answer the question but this receiver is from a time before we ran unregulated lithium batteries. Futaba specifying 6.0 volts may only reflect the fact they were giving the OK for 5 cell NiMh packs.

Any thoughts?

Bill

"Well, Nothing bad can happen now."

PM  EMAIL  GALLERY  Attn:RR  Quote
05-06-2018 01:15 AM  47 days agoPost 2
JuanRodriguez

rrProfessor

The Villages, Florida

My Posts: All  Forum  Topic

Sorry I can't answer your question but my thought is "why take the chance" with such a beautiful model ??? If I were you, I would use a regulator to get the voltage to an acceptable level....

Years ago I came across a "scratch built" (not by me) pitts that was incomplete and never flown..... I finished it, installed the electronics and a G-62. The plane weighed 24 lbs (heavy !) but it flew like a trainer.......

When I moved to Florida I literally gave it away to one of my buddies and unfortunately, he ran it out of fuel and wound up trashing it ....

Anyhow, don't take any chances by listening to someone's "opinion" ......

Been there, done that and old enough to know better.....

PM  EMAIL  GALLERY  Attn:RR  Quote
05-06-2018 12:26 PM  46 days agoPost 3
Dyehard

rrVeteran

Cedar Bluff, Va.

My Posts: All  Forum  Topic

I asked the same thing a couple of years ago about a R617FS receiver.
Almost everyone said they wouldn't use it on two cell lipo power, it would burn up, but all the naysayers also said they hadn't used said receiver on anything over 6 volts. I finally found a statement from Bax at Futaba on another forum stating that the 617 would handle two cell lipo voltage just fine, it was just that the voltage of the servos expected to be used with the 617 were under 6 volts so Futaba rated the 617 at the same voltage as those servos. I then put a 617 in a new YouCanDo 60 with 7.4 volt rated servos and a two cell lipo pack and it has been flying since then with no problems.
If you don't want to risk your expensive plane, stick the receiver in cheap trainer and fly it on high voltage for twenty flights or so. If it is going to burn up because of the higher voltage, it probably will before then. Just keep it well away from people and the most you would risk loosing would be a cheap trainer.

Allen Dye

PM  EMAIL  Attn:RR  Quote
05-06-2018 03:50 PM  46 days agoPost 4
wjvail

rrKey Veteran

Meridian, Mississippi

My Posts: All  Forum  Topic

Thanks for the input guys.

I'm migrating all my most valuable craft from 4 and 5 cell NiCd/NiMh to 2 cell unregulated LiIon. This setup is too simple and too easy to maintain to not consider. I'd like to keep the setup simple and avoid a voltage regulator. Regulators bring a new set of failure points.

When one of my aircraft, such as this Pitts, is due to be refurbished I'm pulling out the older servos and batteries and switching to a HV setup.

The Pitts in question here still had a 72mhz receiver in it and it will be removed and replaces with a 2.4GHz FASST receiver. Sitting in front of me are several older FASST receivers spec-ed for 6.0 volts and a new R7008SB HV. Obviously if there is any doubt I'll put the 7008 in. Because the Pitts is a comparatively simple/low performance airplane (as compared to a modern, large, FBL helicopter) I'd like to install one of the non-serial bus 2.4ghz R6014FS receivers I've got unused.

I'd like Futaba to say any receiver made in the 2.4GHz era (post 72mhz) is 2s LiXX capable. I'd make my life simpler.

"Well, Nothing bad can happen now."

PM  EMAIL  GALLERY  Attn:RR  Quote
05-06-2018 04:39 PM  46 days agoPost 5
helitom

rrApprentice

Pine Grove, Calif, USA

My Posts: All  Forum  Topic

You don't need a trainer. Set it up on your work bench and run it until you are satisfied one way or another.

The older I get, the fewer things seem worth waiting in line for.

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
05-07-2018 11:39 AM  45 days agoPost 6
Dyehard

rrVeteran

Cedar Bluff, Va.

My Posts: All  Forum  Topic

Another option for simple aircraft, seven channels or less, is to use a FrSky TFR6-A FAST compatible receiver. I've got a few of them that I've been using for a couple of years and they seem to work just fine. They only cost around $25 and they are two cell lipo compatible. Quite a few people seem to using the FrSky transmitters with good results and their receivers seem to be just as well made.

Allen Dye

PM  EMAIL  Attn:RR  Quote
05-07-2018 12:13 PM  45 days agoPost 7
Rojoalfa

rrVeteran

Punta de Mata, Monagas-Venezuela

My Posts: All  Forum  Topic

/
/

Base on original question...

Don't mess with voltage specifications.

If you are lucky, your receiver burn out on setup table... If you don't... We will see you on your next crash.

/

Saludos cordiales,

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
05-07-2018 05:21 PM  45 days agoPost 8
wjvail

rrKey Veteran

Meridian, Mississippi

My Posts: All  Forum  Topic

Rojoalfa
Don't mess with voltage specifications.

If you are lucky, your receiver burn out on setup table... If you don't... We will see you on your next crash.
Do you know this to be fact or are you speculating? It comes across as an indisputable statement but possibly the message was altered in translation.?.?

Do you know Futaba FASST receivers to be intolerant of more than 6 volts? Do you have experiences to suggest this? That would be exactly the information I was looking for and very valuable.

There are a LOT of Futaba receivers out there spec-ed for 6.0 that were made before unregulated LiIon packs became popular. Is it possible they were marketed as 5 cell NiMh (6 volt) receivers simply because that is all there was?

"Well, Nothing bad can happen now."

PM  EMAIL  GALLERY  Attn:RR  Quote
05-08-2018 12:16 PM  44 days agoPost 9
Rojoalfa

rrVeteran

Punta de Mata, Monagas-Venezuela

My Posts: All  Forum  Topic

/
/

Well, specifications are on instruction manual. So, no problem.

Try and error?
Well, there is a chance you don't break or burn out something...

If you like the try and error procedure, you better wait for other to fail... And then you are sure...

For high voltage app, more than 6 volts, futaba have the "HV" logo... Be careful...

/

Saludos cordiales,

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
05-08-2018 02:16 PM  44 days agoPost 10
Pistol Pete

rrProfessor

Seffner, FL

My Posts: All  Forum  Topic

wjvail
I'm migrating all my most valuable craft from 4 and 5 cell NiCd/NiMh to 2 cell unregulated LiIon
wjvail
the Pitts is a comparatively simple/low performance airplane (as compared to a modern, large, FBL helicopter) I'd like to install one of the non-serial bus 2.4ghz R6014FS receivers
Have you considered LiFe as an option?

At 6.4V, seems like a better alternative given the Rx predicament at hand plus I don't see the need to go 8.4V at all...
wjvail
...as compared to a modern, large, FBL helicopter

~~Enjoying the hobby one flight at a time~~

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
05-09-2018 12:21 PM  43 days agoPost 11
rpat

rrElite Veteran

Weirton, W. Va.

My Posts: All  Forum  Topic

Why would you NOT call Futaba and get the right answer from the people that can give you the definitive answer.

trex 700fbl cal30,minititan,, trx600fbl,trex250,logo 500,Velocity N2

PM  EMAIL  GALLERY  Attn:RR  Quote
05-09-2018 02:18 PM  43 days agoPost 12
Dr.Ben

rrMaster

Richmond, VA, USA

My Posts: All  Forum  Topic

He did, and the response is pending from me. Sometimes posts like his original one will generate a reply from someone who has already been down the exact same path.

Ben Minor

Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA

PM  EMAIL  GALLERY  Attn:RR  Quote
05-09-2018 03:09 PM  43 days agoPost 13
Dr.Ben

rrMaster

Richmond, VA, USA

My Posts: All  Forum  Topic

From the design engineer at Futaba Japan: Not safe. Do NOT do it.

Ben Minor

Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA

PM  EMAIL  GALLERY  Attn:RR  Quote
05-11-2018 11:48 AM  41 days agoPost 14
rpat

rrElite Veteran

Weirton, W. Va.

My Posts: All  Forum  Topic

I myself have found if you want a critical answer go to the source and get the RIGHT answer. Just look at the answers in this post and then see what the expert said about this question. nuff said and I am not knocking anyone on the post either just telling you what I would do in this case.

trex 700fbl cal30,minititan,, trx600fbl,trex250,logo 500,Velocity N2

PM  EMAIL  GALLERY  Attn:RR  Quote
05-11-2018 04:17 PM  41 days agoPost 15
rcscaleguy

rrNovice

CA, USA

My Posts: All  Forum  Topic

Regulate or LiFe. Simple it works and your not risking your aircraft and or endangering others while flying close in on the deck.

PM  EMAIL  GALLERY  Attn:RR  Quote
05-11-2018 05:15 PM  41 days agoPost 16
wjvail

rrKey Veteran

Meridian, Mississippi

My Posts: All  Forum  Topic

Thanks for all the replies. There have been some great suggestions.

A few thoughts...

I tend to treat my equipment well. I'm of the belief that crashing sucks and I'd rather leave that to others. To put a point on the thought, below are pictures of this plane from both today and from years ago. The young boy is my son. He is now 31, 6'4" and 240lbs. As a generality, my stuff is pretty well maintained. All of this is to say, that if there was a doubt about the answer to the question of this post, there would be no doubt. The new R7008HV receiver (that I already own and isn't being used) would be a clear choice for this project. That is in fact what I'll install.

Going on... For reasons not important to this thread, I have Hobby Services on speed dial on my phone. I could have called Tower, Hobby Services, Great Planes or any number of other people here in the US. Calling the importer was an option from the beginning. I didn't choose to do that for several reasons. First, almost certainly anyone I call in the US is simply going to state what is written on the instruction sheet. I don't speak Japanese so call the "source" really isn't an option.

But more than that, there is this- this is a discussion forum. It is where people ask questions and receive advice. It is where topics of interest to modelers are discussed. Sometimes the advice is more valuable than others. Sometimes it is best to "filter" recommendations. It occurred to me before starting the topic that the best and most accurate answer would likely come from Dr. Ben. I could have simply PMed Ben but what would we have gained from that? By asking the question on a public forum, we have had some great input and a definitive answer has been provided for all to consider. By asking the question here on RunRyder, a resource not available anywhere else (Dr.Ben) has provided an answer for all to use. By asking the question on a public forum, every modeler in America no longer needs to call Japan and ask "Can I use more than 6.0 Volts?".

In short, I asked a question here, received some good advice, and had a RunRyder member directly ask the engineers that builds these products their opinion. By taking this path, everyone wins.

"Well, Nothing bad can happen now."

PM  EMAIL  GALLERY  Attn:RR  Quote
05-11-2018 05:42 PM  41 days agoPost 17
Dr.Ben

rrMaster

Richmond, VA, USA

My Posts: All  Forum  Topic

That's right Bill, which was why I said what I did earlier when it was asked why you asked on open forum. Now this thread is in the RunRyder knowledge collective, so were it to come up again, a search will find the final answer. No social media forum can touch RR for this benefit.

As an aside, I'm sure there are guys out there who have gotten away with running HV on this and similar receivers. Futaba never builds a product with zero performance cushion. The problem is that that is a massive difference between some who runs a model with something like BLS servos which draw draw so very little current and someone else who may run a cluster of higher demand servos. That whole V=IR thing gets pretty interesting when both current and voltage are increased . Always play it safe. Use an HV rated receiver if running HV power.

Ben Minor

Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA

PM  EMAIL  GALLERY  Attn:RR  Quote
05-11-2018 05:50 PM  41 days agoPost 18
Pistol Pete

rrProfessor

Seffner, FL

My Posts: All  Forum  Topic

While there's no doubt the "engineer" response was directly about using 2S LiPo or LiIo, what is not clear is if using a 2S LiFe instead given its close range to a 5cell NiCd or NiMh was also included in the answer.

~~Enjoying the hobby one flight at a time~~

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
05-11-2018 06:41 PM  41 days agoPost 19
Dr.Ben

rrMaster

Richmond, VA, USA

My Posts: All  Forum  Topic

I can find that out too for y'all.

Ben Minor

Peak Aircraft/Team Minicopter Team Futaba Team Kontronik USA

PM  EMAIL  GALLERY  Attn:RR  Quote
05-12-2018 03:01 PM  40 days agoPost 20
Four Stroker

rrElite Veteran

Atlanta

My Posts: All  Forum  Topic

The guy who bought my 12Z and two 6014FS had a mysterious "I ain't got it!" Found the receiver in his $5K pile of trash and tested the crap out of it. Could not make it fail. He was using two 2S 3200 LiPo. Now previously he had short outages that were traced to mongo Hitec servos shorting out with a 6008HS which resets in 0.1 sec. Hitec replaced two motors.

Most regulators shut down when they over heat. There is one in every receiver - maybe 3 volt. Now LiFe drops to 6.6 volts pretty quickly and NiMH 6 volts. Not much difference. They both charge to over 7 volts.

Now when he was post crash testing the RX, he did not have 12 mongo 500 in-oz servos plugged into it.

PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 2 pages [ <<    <    ( 1 )     2     NEXT    >> ] 732 views POST REPLY
HomeAircraftHelicopterRadio - Futaba FASST › Futaba R6014FS Receiver Voltage?
 Print TOPIC  Make Suggestion 

 9  Topic Subscribe

Friday, June 22 - 10:34 am - Copyright © 2000-2018 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online