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HelicopterGasser Model RC HelicoptersOther › Align step down regulator for ignition
11-29-2011 09:50 PM  5 years agoPost 1
ttaylor63

rrApprentice

Floresville,Tx

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Can you use the 5.1v Align step down regulator u would normally use on a rudder servo to lower the voltage on an ignition like the Zenoah 20. Reason i don't like running 2 batteries.
When i hook it up to a 7.4v lipo the voltage reads 7.4v coming from stepdown. Guess maybe the regulator can't handle that much input voltage.?

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11-29-2011 11:10 PM  5 years agoPost 2
rbort

rrProfessor

Franklin, MA - USA

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2 things

1: You have to put a load on it before the voltage will drop.
2: It only drops voltage by about 0.7 to 0.9v. You will MOST likely need to put more than one, in your case more like 3 in series to do this from a 2 cell Lipo.

-=>Raja.

MA 1005 Hanson 280, 4136 flts
Spectra 27 3DMax, 3200 flts
Whiplash V1 Hanson 300, 1430 flts
Whiplash V2 Hanson 300, 196 flts

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11-29-2011 11:43 PM  5 years agoPost 3
Carey Shurley

rrElite Veteran

Orlando, FL - USA

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use a "perfect" stepdown pro regulator. Very small, reliable, cheap

Futaba will shortly have one available as well

If you're not flying a gasoline helicopter
You're paying 10 times too much for fuel!!

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11-29-2011 11:44 PM  5 years agoPost 4
Doug Darby

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Dallas, Texas

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Don't forget a full charged 2S comes off the charger at 8.4 Volts. Many use the small Castle Creations BEC which is programable to the specific voltage you want. And only $20 or so.

doug

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11-30-2011 01:11 AM  5 years agoPost 5
ttaylor63

rrApprentice

Floresville,Tx

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I also have a fromeco regulator for helicopters and it has 2 set of pins in the end where a servo could plug into. I have my rudder servo in one side and the ignition in other. Can this be done like this. ?? The rudder side is regulated to 4.8v. The receiver side is adjustable.

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11-30-2011 01:21 AM  5 years agoPost 6
Carey Shurley

rrElite Veteran

Orlando, FL - USA

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somehow I missed that you wanted to use this for your ignition

I also use Fromecos, both the sahara and the arizona. In fact on my EI model I'm using a 3 connector sahara where two are used for the air pack and the other for the EI unit. So to your point it will work.

the newer RCExL ignitions run on the higher voltage systems as well

If you're not flying a gasoline helicopter
You're paying 10 times too much for fuel!!

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11-30-2011 02:58 AM  5 years agoPost 7
ttaylor63

rrApprentice

Floresville,Tx

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Ok have an older fromeco regualtor with 2 male pins on end. I have my rudder servo plugged into one side & the ignition into other. Have a 2600 MAH 7.4v Li Ion running the servo's. Tried to start motor & it only would run for a little bit & died, then could not get started again. Battery is fully charged...Tried pull starter & electric & nadda. I just put it back in garage for now since work called & i had to leave town... Just tired of messing with for now...

And i haven't messed with the carburetor on this one like i did on my Hanson G-26....

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11-30-2011 03:21 AM  5 years agoPost 8
rbort

rrProfessor

Franklin, MA - USA

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Wait a MINUTE!

Is this a 20 or a 30? WTF? You say in the other post my G26 won't run, yet here you say you're using an ignition battery such as what is in the G20.

SO...which one is it?

-=>Raja.

MA 1005 Hanson 280, 4136 flts
Spectra 27 3DMax, 3200 flts
Whiplash V1 Hanson 300, 1430 flts
Whiplash V2 Hanson 300, 196 flts

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11-30-2011 03:33 AM  5 years agoPost 9
Carey Shurley

rrElite Veteran

Orlando, FL - USA

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plug a 4.8v battery into the ignition and try it. If the same thing happens, its not the power arrangement

If you're not flying a gasoline helicopter
You're paying 10 times too much for fuel!!

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11-30-2011 03:44 AM  5 years agoPost 10
ttaylor63

rrApprentice

Floresville,Tx

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Rbort

I have a 20 and a 30. Also 2 nitro's which I have no problems with like these other 2.

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11-30-2011 04:37 AM  5 years agoPost 11
rbort

rrProfessor

Franklin, MA - USA

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So

What are you asking us for, the 20 or the 30 or both?

In the other post you were talking about the 30 and how it runs for a few seconds and quits. Here you're talking about the 20 and how it runs for a few seconds and quits.

So neither work they both quit on you?

In this case here you may have damaged the ignition system by applying too high of an input voltage to it.

-=>Raja.

MA 1005 Hanson 280, 4136 flts
Spectra 27 3DMax, 3200 flts
Whiplash V1 Hanson 300, 1430 flts
Whiplash V2 Hanson 300, 196 flts

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11-30-2011 04:56 AM  5 years agoPost 12
ttaylor63

rrApprentice

Floresville,Tx

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Think the 30 is fixed, was missing the proper fuel pump gasket in carb.

Now the 20 i'm not real sure yet about. I did fly it with a 6.6V LIFE battery with an Align step down regulator & it ran fine. But i changed some things out, added the fromeco regulator & li-ion battery. Its prolly something i'am doing to cause all this...I will mess with it if i ever get back home...Thanx for all the help...

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11-30-2011 05:04 AM  5 years agoPost 13
rbort

rrProfessor

Franklin, MA - USA

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No problem anytime Terry

If you ran the stock ignition on 6v it can get damaged. I knew a kid here who was running his on a 5 cell pack and it burned out on him. I ended up giving him my RCEXL ignition as he needed something 'right away' those kids have to have something and can't wait and I started using the stock ignition on my motor while I had it.

If you are having problems with the motor suddenly dying at an idle or not starting well at all (hard to start), I've seen this before caused by a bad ignition module. Just a thought but keep at it and I'm sure you'll get sorted out.

-=>Raja.

MA 1005 Hanson 280, 4136 flts
Spectra 27 3DMax, 3200 flts
Whiplash V1 Hanson 300, 1430 flts
Whiplash V2 Hanson 300, 196 flts

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12-02-2011 03:27 PM  5 years agoPost 14
RojoalfarrApprentice - Punta de Mata,​Monagas-Venezuela - My Posts: All  Forum  Topic

Zenoah CDI...4.8 volts...nominal... no​more...

/
/

On my radikal G20 HD FC , we put a LIPO 7.4 volts , 5000 mAH, driving both electronics and CDI.
Each load with regulators.

On CDI arrangement, we used a 3 amps UBEC regulator from HEXTRONIK.

Specifications;
Output: 5v/3a & 6v/3a (Selectable via jumper)
Ripply: <50mVp-p(@2A/12V)
Input: 5.5v~23v (2 to 5s)
Size:41.6mm*16.6mm*7.0mm
Weight: 12.5g

CDI just need 1.0 amp at 4.8 volts!

/

Step-down from ALIGN is the cheaper option and only drive 0.7 volts down!!!...

5.1 volts - 0.7 volts = 4.4 volts!!!

So , you don´t need a step down for your CDI if your voltage source is at 5.1 volts!!!

/

Saludos cordiales,

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