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Which lipo for driving a starter?

Old 01-27-2012, 03:58 AM
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Popriv
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Default Which lipo for driving a starter?

My 12v hobbico battery is just about dead and I'd like to replace it with a lipo attached to the starter.
What C rating and mah do I need to drive the starter?

Thanks

Steve
Old 01-27-2012, 04:04 AM
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rolliedog12
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Default RE: Which lipo for driving a starter?

I use a 25c 1350mah on my hobbico starter! I dont fly big airplanes only 40 and 60 size so the starter works perfect for me.
Old 01-27-2012, 05:27 AM
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Default RE: Which lipo for driving a starter?


ORIGINAL: rolliedog12

I use a 25c 1350mah on my hobbico starter! I dont fly big airplanes only 40 and 60 size so the starter works perfect for me.
Thanks, I dont fly anything over .60 also... How long does a charge last?

Old 01-27-2012, 06:46 AM
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dignlivn
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Default RE: Which lipo for driving a starter?



I'm using a 4 cell 30c 3300mAh flitepower lipo.
My largest glow engine is a 4 stroke 120 OS.

I charge it once a Month,

Bob
Old 01-27-2012, 07:11 AM
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Default RE: Which lipo for driving a starter?

Hi!
14,8V, 2200mAh Lipo!
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Old 01-27-2012, 07:15 AM
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Default RE: Which lipo for driving a starter?


ORIGINAL: jaka

Hi!
14,8V, 2200mAh Lipo!
Interesting, is that a glow driver attached to the same battery?

If so I'd worry about the cord getting caught in the prop?

steve
Old 01-27-2012, 07:18 AM
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Default RE: Which lipo for driving a starter?

I guess my question should be What is the minimum battery you would recommend as I'm on a limited budget????

I'd like to get a weekend out of it? probably 10 - 20 starts.....

steve
Old 01-27-2012, 11:08 AM
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Default RE: Which lipo for driving a starter?

I use this one...

http://www.hobbypartz.com/83p-4000mah-4s1p-148-20c.html

Pretty cheap for the power it puts to the starter.  I can start my 40cc Zenoah with it! 

Just be cautious...Ive burned starters out on gas engines using a 4s by holding the button too long.  Smoked it!  lol

But that was my own fault.  The engine wouldnt start and I kept on and on and on...then the magic smoke left from the starter?!?!?!?! lol
Old 01-27-2012, 12:00 PM
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Default RE: Which lipo for driving a starter?


ORIGINAL: Popriv


Interesting, is that a glow driver attached to the same battery?

If so I'd worry about the cord getting caught in the prop?

steve
Glow drivers require 1.2v

LiPo will burn out your glow plug instantly.

-

I use a cheap 12c 4000mAh 14.8v LiPo pack with my Hobbico starters.

With a larger cone the starter can turn over 1.20-1.60 glow engines w/o problems.

If I switch to 18v packs I have no problems starting 50cc gas engines.

I charge my pack once or twice a MONTH during the heaviest part of the flying season.






Old 01-27-2012, 03:48 PM
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rolliedog12
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Default RE: Which lipo for driving a starter?

Mine will last the week-end, and it was a very cheap battery.
Try Value Hobby, they sell them cheap and usually delivered in less than a week.
Old 01-27-2012, 05:11 PM
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Default RE: Which lipo for driving a starter?

I was going to the first reply to the original post thinking that perhaps 1350 mah was a tad short. If it were me, I'd go for at least 4000 mah and probably four cells with a good C rating. But, that could be a tad bit more expensive than a replacement 12 volt lead-acid or gel-cell pack.

Jose, that must take at least a couple hours to recharge??

CGr.
Old 01-27-2012, 05:17 PM
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Default RE: Which lipo for driving a starter?

Here is an alternative to a battery for a starter

http://www.harborfreight.com/automot...ply-38391.html

This will start anything!!

CGr
Old 01-27-2012, 05:29 PM
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Default RE: Which lipo for driving a starter?

http://www3.towerhobbies.com/cgi-bin...&I=LXJC37&P=ML this starter and a 3 cell 2200 lipo 25c battery will start a 1.80 two stroke glow engine
it lasts at least a month (id guess around 250 starts) turning 40-90 sized engines
Old 01-28-2012, 10:07 AM
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Default RE: Which lipo for driving a starter?

Just a word of caution, if you use a lipo and see its slowing down stop and recharge the battery.There is no automatic voltage cutoff and if you discharge it too far the battery wont recharge. Ask me how I know?
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Old 02-03-2012, 09:51 AM
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Default RE: Which lipo for driving a starter?

LiPo batteries are pretty cool, so are NiMh.
But the problem is: You don't always have to go Hi Tech to perform a simple task.
Running a Starter is a simple task and its failure would not cost you hundreds of dollars or hundreds of hours of building time. Such as a battery failure of the receiver or electronic ignition system.<o></o>

So why not keep is simple and keep it inexpensive?<o></o>

<o></o>

Here is an idea: How about any Rechargeable Sealed Battery. <o></o>

Probably one that is in your workshop right now?<o></o>

How about the Battery Pack from your portable electric drill – saw – flashlight.<o></o>

And think about it … You Do Not have to buy a battery charger. And some of the chargers are FANCY <o></o>

With Check lights – Charge lights and Cycle completion lights.<o></o>

<o></o>

Or if one is insistent on spending money – Go to a catalog such as McMaster or Granger and find a <o></o>

Gel Cell that fits the size requirement for your operation.<o></o>

Size being BOTH physical and electrical.<o></o>

<o></o>

Oh, LiPo battery sizes… Or any battery rated in mAH:<o></o>

m = mili - - meaning one thousandth’s of a whole ie: 1000 mA = 1 Amp. 1 mA is 1/1000<sup>th</sup> of an Amp.<o></o>

AH = Amp Hour = How many Amps a battery can deliver for an Hour. Example: a 100 AH battery is rated at 1 Amp for 100 hours or 100 Amps for 1 Hour. NOW! Don’t yell at me… I don’t believe it either, but that is what the AH and rating system says.<o></o>

<o></o>

So, a 2000 mAH LiPo is ONLY – ONLY – a 2 AH battery. The cheapest Tractor Battery or Motorcycle Battery or Drill Battery is WAY OVER 2AH (2000 mAH).<o></o>

Just read the writing on the <st1lace w:st="on">Battery</st1lace>.<o></o>

<o></o>

Barry<o></o>

Old 02-06-2012, 01:15 AM
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Default RE: Which lipo for driving a starter?

Hobbyking 3S1P 1800mAH, 20-30C discharge on Sullivan Dynatron. I start my DLE30cc engine about 10 times over the last weekend, and I used 10% of the batt according to the Cellmeter pro.
It spins the engine with ease.

3S works fine as long as the batt can provide sufficient current to the starter without voltage drop.
Old 02-07-2012, 09:25 AM
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Default RE: Which lipo for driving a starter?

hey there, i just started experimenting with this last week and am very pleased with results. i hace 3s 4s and a 6s all on different starters. i think 4s on any 12v starter will give you plenty of starting power as it will easily spin my brand new Magnum 120 2-stroke and my buddies YS 170. i have a sullivan Dynatron laying around and strapped the 6s batt to it and HOLY-JESUS it'll just about start a Mac truck. Wayyyy toooo much but now i know. 3s should be fine for up to .60 size but i would recommend 4s 2000-3000mah and 20c is plenty.

just my opinion!!!
Scotty
Old 02-07-2012, 11:35 AM
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Default RE: Which lipo for driving a starter?

What about A123 batteries? is anyone using them on the starter???

I have a cellpro multi4 which will charge them...

steve
Old 02-08-2012, 06:40 PM
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Default RE: Which lipo for driving a starter?


ORIGINAL: Popriv

What about A123 batteries? is anyone using them on the starter???

I have a cellpro multi4 which will charge them...

steve
they will work just fine
Old 02-18-2012, 02:59 PM
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Default RE: Which lipo for driving a starter?

You guys got me thinking. I have five 28cc motors and my shoulder is not getting any younger! When one gets balkly my shoulder aches!

I have a cheap Hobbico Torquemaster 180 starter. After studying this thread I took it out of storage and tried it with a 5000 6 cell lipo. Oh my god was it wicked! I then scaled back to a Hobbyking 3000 4 cell nano tech. Worked great on my MLD28 engines. The photos are the finished product. A starter, small piece of plywood, 4 4/40 blind nuts, bolts, washers and cheap Hobbyking connectors.

Very light and very strong. Blew everything off the workbench when I tested it. Started the engine great even at 40 degrees!

Thanks guys.
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Old 02-18-2012, 03:06 PM
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Default RE: Which lipo for driving a starter?

YUP!!! I use the 6cell and it will take the lug nuts off my truck. Love it. Everyone borrows it
Old 02-18-2012, 03:27 PM
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Default RE: Which lipo for driving a starter?

I think I could fly the plane with the six cell.

I wonder how long these starters will last with this kind of power?
Old 02-18-2012, 03:32 PM
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Default RE: Which lipo for driving a starter?

I use my on a sullivan dynatron which is designed to operate on 12 or 24 v. Just don't stay on the starter to long. It will get hot in a hurry.

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