RunRyder - Starter batteries-series or parallel ?

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Tools and Field Equipment > Starter batteries-series or parallel ?

Hovermower
Heliman
Location: Sheffield,England

Just got me a Sullivan Dynatron starter and I was thinking of using two 3s 2100 lipo,s to power it, but not sure whether to wire it up in series or parallel?....will be using the starter on 50,s and 90,s.

Thank you in advance

01-17-2008 01:41 PM

tailspin90
Elite Veteran
Location: Portage, IN

In series the volts will add. In parallel the current will add.

..........Joe

Local Smart A$$......JR Helis Rule!!!

01-17-2008 04:48 PM

Hovermower
Heliman
Location: Sheffield,England

Thanks tailspin90

Whats better,more volts or more amps?

01-17-2008 05:09 PM

Rafael23cc
Key Veteran
Location: Junction City, KS

Since the dynatron can handle 24 volts, I would wire them in series to give you the umph you need to spin the 90. Be careful when starting anything smaller, if it is flooded, you might damage the engine.

I have 2 1900mAh 7-cell NiCd packs wired in series on the bottom of my starter. I have started a G38 (gas engine) with my starter (not a dynatron).

Rafael

Keep your feet on the ground, but your eyes on the sky.

01-17-2008 09:42 PM

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balsapro
Senior Heliman
Location: Gallatin,TN

series is the way to go. if you don't have enough volts to the dynatron it will seem weak.

Build the Best, Fly the Best, Crash the Best

01-20-2008 07:07 AM

WiscHeli
Veteran
Location: Wisconsin USA

I have 2X 3S-5000mah packs on mine with 2 deans addaptors so I can run it on 11.1v or 22.2v now i can chose for the size of the engine i am starting how much power

T-Rex450seV2,, 600N-Pro ..500CF... Jr 9303 Syn 72Mhz

01-31-2008 08:41 PM

Hovermower
Heliman
Location: Sheffield,England

Thanks guys,decided to wire it up in series...

Boy is this thing powerful!!!!!

02-01-2008 12:22 PM

Antsis
Senior Heliman
Location: Kent, United Kingdom

Hi All

I'm thinking of doing this with my dynatron. It struggles to start my 91SZH on a 12V car battery. The battery sits in my flightbox and powers the fuel pump. I'm sick of lugging it on and out of the car. I could use a small 12V 7Ah battery for the pump and 2 x 11.1V, 1800mA lipos from my X400 for the starter.

Quote
have 2X 3S-5000mah packs on mine with 2 deans adaptors so I can run it on 11.1v or 22.2v now i can chose for the size of the engine i am starting how much power

Will the dynatron spin a 50 on one pack?

Ant

03-04-2008 05:47 PM

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brcg123
Senior Heliman
Location: Wagoner OK USA

why dont you put a 18v battery pack from lowes and spin the top off all of them. it costs less than buying lipos

Bruce

03-04-2008 05:54 PM

Drunk Monk
rrProfessor
Location: Preston, UK

Battery powered starters really are the future, no more lugging around heavy batteries for a flight box, well worth the expense. I a 6 cell and 8 cell nimh 3300 pack and use them, they were only cheap, plenty to be found if you look around. Seems a shame to waste a good lipo for a starter.

Stephen

I only open my mouth to change feet.....

03-04-2008 06:03 PM

mmc205
Senior Heliman
Location: Pottstown,PA - USA

has anyone ever measured amps when starting an engine 30,50, 90, etc
what volts and what amps. I'm just curious because this would aid in proper battery selection for a lightweight setup. It seems not matter what the a123 batts at 12-15v would work great for a starter because of their high discharge characteristics and robust nature (my starter tends to get dropped and banged up occasionally)

I FIND THE DENSITY OF THE AIR CHANGES SIGNIFICANTLY BELOW 0 ALTITUDE.

03-11-2008 01:00 PM

rtdillon
Heliman
Location: Atoka, OK . . . yea. I'm lost! LOL

http://www.runryder.com/helicopter/t423807p1/

Shows an adaptation of the B&D battery to our needs.

No,No..The other left!

04-20-2008 07:05 PM

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Tools and Field Equipment > Starter batteries-series or parallel ?

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