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HelicopterMain Discussion › Need help with High Voltage Switch spec
11-15-2017 07:14 PM  6 months agoPost 1
InvertedDude

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USA

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This is what I ordered:

AR93030T 3.5v to 9v input

Hitec HS-5495HB x 4
https://www.servocity.com/hs-5495bh

Toggle Switch
https://www.horizonhobby.com/spm9532

Gyro Gy611/9256 (4.8V)

(Gyro) Spektrum VR5423 regulator
https://www.horizonhobby.com/vr5203...lator-spmvr5203

Lipo 2s battery

My question, does the toggle switch handle high voltage 8.4 volts/10 amps?

This is for my Hirobo shuttle plus 2 helicopter.

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11-15-2017 07:35 PM  6 months agoPost 2
Richardmid1

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Leeds, England

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No not 10A, that switch has a single servo plug connection which are only good for around 3A continuous 5A peak. However those servos, your setup and your flying style (with such a heli) will not pull much power at all so should be fine.

60% of the time, it works every time!

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11-15-2017 07:38 PM  6 months agoPost 3
InvertedDude

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USA

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Richardmid1
So I should just wire up an EC3 connector with multiple output to RX?

I mean removing the switch from the set up.

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11-15-2017 09:41 PM  6 months agoPost 4
JuanRodriguez

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The Villages, Florida

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Anytime you can remove a potential failure point is a plus....

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

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11-16-2017 01:25 AM  6 months agoPost 5
jharkin

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Holliston, MA - USA

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NOTHING in your setup is going to pull 10 amps.

Id be surprised if an old flybar heli even pulls 1 amp.

That switch will be completely fine. I use those on my 700 FBL gassers with all futaba BLS servos that average around 2+A continuous. No problems in years and years. I also used to charge through servo plugs at 4amps even though the specs say no - nothing ever even got warm.

Chill out, fly and dont worry. People in this hobby go so overboard on electrical specs its funny sometimes

Oh and if you want to eliminate complexity and potential failure points, dont worry about the switch. Instead dump the regulator and lipo and use an unregulated LiFe pack along with a 6v rated tail servo.

-Jeremy
Whiplash-G
Helix 700G
T-Rex 450 fbl conversion
alot of planks

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11-16-2017 01:51 AM  6 months agoPost 6
EEngineer

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TX

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From the Hitec website:

http://hitecrcd.com/products/servos...t-servo/product

Notice the stall current is 1.4A.....which means Hitec has tested it.

It's quite possible that under certain aerodynamic conditions(3D) that the stall current could be approached momentarily at times...so I call BS on jharkin's assumptions.

The best thing you can do is to generate a "current consumption budget".

To the extent you can(using manufacturer's data), add up the current that all the electronic components draw....servos, Rx, etc.....and see what you get..... then you can better judge as to how to supply the needed current.....plus some overage for safety's sake.

This is always done in real life engineering....why not with RC?

Is that the JR HD switch you're planning to use? I hope so...

Keep in mind that the switch's internal contact resistance will result in a slight voltage drop....depending upon how much current is being drawn at any instance.

This voltage drop can be easily measured using a DVM....in fact, if you manually try to make the servos work harder, this measured voltage drop should increase as more current is being drawn.

I'd run a LiPo rather than a LiFe....as you had planned to.

The bottom line is that by analyzing things, you should have no surprises....rather than throwing caution to the wind....and "chilling out"....
Id be surprised if an old flybar heli even pulls 1 amp.
People in this hobby go so overboard on electrical specs its funny sometimes
I guess jharkin is guaranteeing his opinion with his wallet......based solely on his "guess"....

Who would you believe....Hitec or jharkin?

Logo 600SXs, 800XX, TDR IIs

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11-16-2017 02:24 AM  6 months agoPost 7
KJH

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Interlochen, MI

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This is for my Hirobo shuttle plus 2 helicopter.
Make it period correct: 5 analog servos, mechanical gyro and a 4 cell NiCad pack. Don't forget the switch. Those puny ones we used to get when they actually included servos and a receiver when you bought a radio. Shuttles and other helis of the time flew great with this stuff. When they did fall out of the sky, it usually wasn't due to radio problems.

Really, you don't need to go overboard with HV digital servos and a Li-Po pack. It's a Shuttle, man.

I recently upgraded my old stuff, which amounted to replacing batteries with LiFe packs and dropping voltage to 5v for Futaba 9252 and 9253/4 servos and GY401 gyros.

-Kevin

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11-16-2017 02:32 AM  6 months agoPost 8
Ronald Thomas

rrMaster

Gainesville, Fl, USA

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Never chance the electronic's power system, always OVER build it...

Team MikadoUSA 480XXTreme, 550SX, 600SX, 700XXTreme, 800XXTreme!!

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11-16-2017 03:37 AM  6 months agoPost 9
EEngineer

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TX

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+10....

Logo 600SXs, 800XX, TDR IIs

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11-16-2017 05:15 AM  6 months agoPost 10
ticedoff8

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Morgan Hill, CA. USA

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Come on you guys...
This is a Hirobo shuttle plus 2 helicopter.

This is a 30-size, flybar equipped helicopter that was designed for analog servos.

This thing is never going pull more than 500mA from the battery no matter what is going on.

Believe 1/2 of what you see and none of what you hear.
Fake News will be the downfall of our Republic!

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11-16-2017 05:55 AM  6 months agoPost 11
EEngineer

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TX

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Perhaps....for the record...would you have any data on this?

And now days, the servos are different....and back then, no one cared because if the radios worked...luck was with us....

Logo 600SXs, 800XX, TDR IIs

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11-16-2017 01:47 PM  6 months agoPost 12
ICUR1-2

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Ottawa, Ontario

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I would believe someone who has been in the hobby long enough over the manufacture any day.
As for a rx I find it funny the recomendations for a high power set up lol.
Nicads and nimhs did well for many years and is certainly not necessary for a 30 size sport flyer .

My recommendation would be not to use a switch. They have failed frequently for me. It is safer to plug in the battery.

spending time, paying attention

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11-16-2017 02:04 PM  6 months agoPost 13
EEngineer

rrProfessor

TX

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I would believe someone who has been in the hobby long enough over the manufacture any day.
So, you would believe someone who claims a "guess" over a manufacturer, Hitec in this case, that has a specification for servo current? A spec that has been subject to testing....rather than "guessing"....

Is that what you'd believe...and have everyone believe?

I just want to be clear with regards to your viewpoint....

Logo 600SXs, 800XX, TDR IIs

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11-16-2017 02:58 PM  6 months agoPost 14
ICUR1-2

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Ottawa, Ontario

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It's not a guess it is practical experience .

Very few engineers would understand what that is.

spending time, paying attention

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11-16-2017 05:05 PM  6 months agoPost 15
Pistol Pete

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Seffner, FL

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ICUR1-2
It's not a guess it is practical experience .

Very few engineers would understand what that is.
How dare you insinuate that experience trumps book smarts!?

http://www.craveonline.com/mandator...asters#/slide/1

Specially when it comes down to the "toy" level. How unscrupulous!

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

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11-16-2017 05:15 PM  6 months agoPost 16
Ronald Thomas

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Gainesville, Fl, USA

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This is a 30-size, flybar equipped helicopter that was designed for analog servos.
This thing is never going pull more than 500mA from the battery no matter what is going on.
Yes bit now he is going to put HV servos in it and updated equipment. Why take the chance for literally a couple of dollars difference?

Team MikadoUSA 480XXTreme, 550SX, 600SX, 700XXTreme, 800XXTreme!!

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11-16-2017 05:51 PM  6 months agoPost 17
EEngineer

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TX

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Such practical experience equates to guesswork.

Not even an attempt to use your own DVM to make a measurement.

All engineers can see this.....LOL

Logo 600SXs, 800XX, TDR IIs

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11-16-2017 05:55 PM  6 months agoPost 18
EEngineer

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TX

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Just book smarts, Pete?

Try > 40 years of design experience in addition.

How about you, Pete?

LOL

It figures you would use a link like that to demonstrate your lack of....never mind.

Go have another beer....lol

Logo 600SXs, 800XX, TDR IIs

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11-16-2017 06:19 PM  6 months agoPost 19
ICUR1-2

rrElite Veteran

Ottawa, Ontario

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You engineer types are too funny.

lol guys like me take what engineers design and make em better or at the least learn what those limits are and exceed them with great success

But go on have another beer

to stay on topic He would do just fine with a 5 cell nimh for 2 flights then need to recharge .

spending time, paying attention

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11-16-2017 06:22 PM  6 months agoPost 20
KJH

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Interlochen, MI

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Based on the OP's equipment above, what should that 2S LiPo's capacity be for four or five 15 minute flights?

-Kevin

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HelicopterMain Discussion › Need help with High Voltage Switch spec
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