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Home✈️Aircraft🚁HelicopterCentury Radikal G20-30 N640 Hawk Predator › Starting problems! Suggestions???
04-30-2011 03:33 AM  10 years ago
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Nelson34

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San jose ca

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Starting problems! Suggestions???
So Im trying to start my Radical 20 for the first time and have it dialed in. Or so I thought...something is wrong because I can get it to turn over and start, but it will only run for a few seconds at best and then shut off. I've checked for leaks and could not find one. Checked my ignition battery and ignition connection on the spark plug and checked ok. Checked the plug. Seems like the engine stalls due to lack of gas-I'm not sure just a guess. I am running a fueling T and checked it for leaks and could'nt find one-as a matter of fact I could see fuel going to the engine. Also read how some people are putting primer bulbs on the engine? Anyone have any info on this or if needed? This is a stock engine and I've tried running two different mixtures and set the engine per instructions. We also tried playing with the needles and still could'nt get it to stay on. I have a Radical 30 with a Toxic engine and that starts on a dime-so I tried running the fuel I use on it and still had the same results-any help would be greatly appreciated. I will probably buy a fuel filter and get rid of the T, and just fill through that tomorrow and see if that helps.
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04-30-2011 11:33 PM  10 years ago
oldfart

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What are you using for the EI battery?Phil
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04-30-2011 11:36 PM  10 years ago
Nelson34

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I'm using a Futaba battery pack-checked the battery after and had 5 volts-
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05-01-2011 12:18 AM  10 years ago
James Kovach

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canton, oh - US

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Is it cutting out when you start to bring the engine up to rpm? If so, try a different battery.*disclaimer: These are my opinions. Agree or disagree, Your Call :)
Let'r Rip Tator Chip
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05-01-2011 06:04 AM  10 years ago
Nelson34

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Sparx-Runs 'weak' and as soon as throttle given dies-going to charge the pack and see if that help-if not I'll go buy another pack since my only one. The engine has also backfired twice when running. Thanks for responding and I'll post up results.
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05-01-2011 02:40 PM  10 years ago
James Kovach

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canton, oh - US

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From what you are saying, it is most likely one of two things. The battery you are using is not sufficient or your Ignition unit is bad. I have seen a few of them bad out of the box.*disclaimer: These are my opinions. Agree or disagree, Your Call :)
Let'r Rip Tator Chip
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05-01-2011 09:53 PM  10 years ago
flybear

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British Columbia, Canada

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I have exactly the same problem. Fires with the choke on, close the choke and it starts and runs for a second or two then quits. Can pull the starter all day with the choke off and it will not fire. I have tried different battery packs but there is no difference. The timing seems to be OK since the plug sparks just as the pistom comes up to top dead center.
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05-02-2011 12:34 AM  10 years ago
Nelson34

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Ok so i switched the magnet on the fan-and wouldn't even start. So I tore it apart and Sparx I think you are the winner winner chicken dinner. I did the magnet test where I plugged in the spark plug to the ignition and grounded the sparkling to the engine case test-heard the snap for a second or two and then just started letting off a high 'squealing'. So Im going to run to LHS for a new battery-plugged it in and it said 4% from almost 100! So if the battery is still not the fix-has to be the ignition unit-more to come! Stay tuned!
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05-02-2011 01:20 AM  10 years ago
Nelson34

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Ok battery has 5 volts-LHS checked it-he thinks it's too small a pack though-it's a sanyo 1000 mAh pack. Is this too small a pack for ignition?
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05-02-2011 02:07 AM  10 years ago
10poundlawndart

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Peterborough, Ontario, Canada

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Starting problems! Suggestions???
Hello Nelson34

I had some similar problems with my Radikal G20.
OLDFART has a really great lecture on here somewhere about batteries.
It is well worth the read. Sure helped me. But I have to wonder why the Zenoah engine manual doesn't have some better info. re: battery types. Only my opinion.
I think you need a 2000MAH Nickel Metal Hydride.
NMH will deliver better amps than a NI-CD. Mine would not run on a 1000MAH Ni-CD, would start, stumble then die. I switched to a 2000MAH NMH, runs great. The original ignition module gave up the ghost I replaced it with a RCexl. Battery will last for 3 tanks of fuel.
Hope this helps a bit.
Jon,,,,,,Peterborough
it is best to remain silent and be thought a fool, than to speak up and remove all doubt
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05-02-2011 02:30 AM  10 years ago
Nelson34

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San jose ca

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I'll have to look that battery thread up-well I think I could tear apart my Radical with my eyes closed now! Anyways ill pick up a battery tomorrow and hopefully that should do it-
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05-03-2011 02:10 AM  10 years ago
oldfart

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Vancouver, Canada

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I think you need a 2000MAH Nickel Metal Hydride.
NMH will deliver better amps than a NI-CD. Mine would not run on a 1000MAH Ni-CD, would start, stumble then die. I switched to a 2000MAH NMH, runs great.
Sorry Jon, if you dig up my post you will find that the same rating of NiCd battery compared to NiMh will be able to deliver higher wattage (power) then a NiMH.

You may have made a typo there.

But in any case, a 1000mah pack of either would be far to small as the EI unit will draw about 3 amps from a 4.8V pack during flight. So you must be sure the battery pack you use is capable of easily providing that amount of current.
Phil
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05-03-2011 02:38 AM  10 years ago
Nelson34

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San jose ca

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Thanks-I'm going to try out another battery tomorrow and hope it's the the ignition module itself-
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05-03-2011 03:26 AM  10 years ago
10poundlawndart

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Peterborough, Ontario, Canada

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Starting problems! Suggestions???
Hi OLDFART, Nelson34, and all,

I do stand corrected, OLDFART, you have a sharp eye.
I tried to say (sigh & confusion)(it's a welder thing) that a 2000MAH would deliver much more amps than a 1000nicd. As I learned about MAH ratings and the difference between the two types of batteries I was overwhelmed to say the least. So I have great luck with a 2000MAH NIMH on the ignition and a pair of 2000MAH NIMH batteries in parallel to run my RX and servos. The batteries will give me three tanks of fun before they start to drop off.(I'm fried after 1 tank anyways) I understand the relationship between volts and amps, but the 'rating' thing still escapes me, hence some confusion still. I did find that the knockoff ignition is much easier on a battery than the original ignition.

I stand corrected, thanks for catching that OLDFART.
Jon,,,,,,,Peterborough

good thing OLDFART is back
it is best to remain silent and be thought a fool, than to speak up and remove all doubt
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05-09-2011 06:25 AM  10 years ago
Nelson34

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San jose ca

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Alright...so we have another Radical 20 flying the skys! Thanks to all for your help. Seems I had multiple problems. 1st was ignition magnet was incorrect. I had the wrong magnet on the fan assembly at the 10 o'clock position. 2nd problem was my battery pack was defective and underpowered. Fixed both and glad to say spent Saturday afternoon hoovering my Radical 20. I have a Jewel from Rbort installed and have to say...best upgrade so far! Want to thank Paul at Century for all his help as well.
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05-09-2011 07:18 AM  10 years ago
strat1960s

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San Antonio Texas

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I wander if adding a magneto-driven CDI ignition would help eliminate some of the battery issues?

Ted
I always have fun. Some times are more fun than others.
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06-07-2011 07:22 AM  10 years ago
charlieoneseven

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Huntington Beach, Ca. USA

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When I put my fan on that dual magnets sort of caught my eye. Are both magnets or is one just a balance weight? What an easy mistake to make on assembly without the EI or a battery on hand it would get buried and be hard to trace as Nelson34 found out. We have a 50/50 chance of getting it right or wrong the first time looking only at the book. I found a small piece of paper with a nut attached to it that had the instructions on how to test what magnet works with the EI.
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06-07-2011 01:29 PM  10 years ago
Rodney

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St.Cloud,Florida

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Battery voltage or average is not your problem. I have been running a lithium 3.7volts 1000mah on my coil from the start. With no issues at all. I get about 4 tanks on it before charging.Dx7 With Ion Power Supply. Why use anything else.
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06-07-2011 05:05 PM  10 years ago
Nelson34

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San jose ca

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Ok-so seems my screws on the fan unit came loose and were chewing up the fan and magnets, as well as the ignition sensor itself. Maybe not enough locktight when I assembled the fan. I actually took the Radical to Century and Paul there stayed till 9 one night and 10 the next working on it. He basically checked everything out on it and made sure my Radical was working correctly. I think maybe Billme? was helping out as well on the phone. Century really stands behind their product! Glad to say my Radical has fired right up everytime now! Just waiting for the California weather to figure out it's summer! He also found a loose ball link on my swash-I never bothered to check the links out when I got the swash-so valuable lesson-check your parts even if they come preassembled-the instructions tell you to-and locktight is good!
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06-07-2011 06:12 PM  10 years ago
Billme

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MS

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Zman also helped besides me...Glad you are on your way
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Home✈️Aircraft🚁HelicopterCentury Radikal G20-30 N640 Hawk Predator › Starting problems! Suggestions???
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