RunRyder RC
 6  Topic Subscribe
WATCH
 2 pages [ <<    <    ( 1 )     2     NEXT    >> ] 1901 views POST REPLY
HelicopterCentury Radikal G20-30 N640 Hawk Predator › will this work for Radical G20 ignitiion battery
10-25-2011 04:43 PM  6 years agoPost 1
jimmymc2286

rrApprentice

Commiskey, Indiana USA

My Posts: All  Forum  Topic

My Radical is just about ready to fly. I read some where of a person using a one cell lipo to run his CDI. Just to see if it would work I made a 2200mah single cell and plugged it in to the CDI. When I check for spark the CDI fired every time. Now for my question, I know that the stock CDI is a power hog 2.2 amps. If I wire up 2 2200mah cells in parallel giving me 4400mah at 3.7 volts. how much flight time would that give me.

Jimmy

Jimmy, If it looks like a heli I like it.

PM  EMAIL  Attn:RR  Quote
10-25-2011 05:08 PM  6 years agoPost 2
Pistol Pete

rrProfessor

Seffner, FL

My Posts: All  Forum  Topic

I have been testing different batts and voltages with mine with a watts up meter and others since im working on a side project.

Needed 3.4V to drive EI or it misfires.

Current ranges from .3A idle (2000rpm) to .85A WOT (8300rpm).

20 min flight <=300mAh.

yes...1 cell and no regulator required

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

PM  EMAIL  HOMEPAGE  GALLERY  BLOGAttn:RR  Quote
10-25-2011 11:22 PM  6 years agoPost 3
jimmymc2286

rrApprentice

Commiskey, Indiana USA

My Posts: All  Forum  Topic

Wow that sound great. Are you using the stock CDI? If I can get 20 min. flights on a battery that is more time then I like to fly at one time. I have no problem changing batteries between flights and rechargeing at the field.

Jimmy, If it looks like a heli I like it.

PM  EMAIL  Attn:RR  Quote
10-26-2011 02:17 AM  6 years agoPost 4
Pistol Pete

rrProfessor

Seffner, FL

My Posts: All  Forum  Topic

Yes...stock CDI.

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

PM  EMAIL  HOMEPAGE  GALLERY  BLOGAttn:RR  Quote
10-26-2011 02:42 AM  6 years agoPost 5
jimmymc2286

rrApprentice

Commiskey, Indiana USA

My Posts: All  Forum  Topic

Thank you so much, I am good to go. I will try and get it started tomarrow.

Jimmy, If it looks like a heli I like it.

PM  EMAIL  Attn:RR  Quote
10-26-2011 06:05 AM  6 years agoPost 6
D Pedersen

rrApprentice

Rycroft .Alberta .Canada

My Posts: All  Forum  Topic

I use a 2000mah 3.7v lipo and fly 2 flights back to back always .That is about 18 minutes each for a total of 36 minutes flying and use about 850mah out of the pack with the stock igniton.So I could make a 3rd flight and still be within the 70% rule.I just always recharge after 2 flights?

Logo 550SX / Rush 766 / TT E700

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
10-26-2011 09:41 PM  6 years agoPost 7
jimmymc2286

rrApprentice

Commiskey, Indiana USA

My Posts: All  Forum  Topic

D Pederson,

Thanks for the info. I went ahead and made up 2 2200mah lipos and will use them. I only fly about 10 min. at a time. I will check after each flight and see how they are doing. I hope to get similar results to yours.

Jimmy

Jimmy, If it looks like a heli I like it.

PM  EMAIL  Attn:RR  Quote
10-27-2011 07:20 AM  6 years agoPost 8
strat1960s

rrApprentice

San Antonio Texas

My Posts: All  Forum  Topic

Jimmy,

I've been using a Spectrum NiMh pack for my EI on my G20. I usually get 2 to 3 flights on a pack before rotating the pack out for another. The bottom line is to check your packs before each flight. I wired a volt watch into the EI on/off switch on my heli. I check the packs state of charge before each flight and put in a fresh pack when the voltage drops down into the second green LED. I've been using 2 cell lipos for the rx. I can get 3 to 4 flights on a single charge, but once the state of charge drops into the second LED the Thunder Power packs crash fast. I've had to toss 3 TP packs because the voltage dropped to low and would not take a charge. Admittedly, I don't know everything about lipo packs, but I wasn't getting much support from thunder power so I am now flying with a hyperion 2 cell lipo pack on the rx.

Let us know how things go. I thought I read you were going to fire up the motor soon.

Ted

I always have fun. Some times are more fun than others.

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
10-27-2011 11:39 AM  6 years agoPost 9
Engin21

rrNovice

Belgium

My Posts: All  Forum  Topic

This is what I'm using in my Radical G20 FBL
Toni Clark ZG-12450 Li-Po Ignition-batt
3000mAh Lipo

http://www.century-heli.de/shop/pro...2&cPath=403_484

Max 1.5 hour flight before charging, depending on flying style.

PM  EMAIL  GALLERY  Attn:RR  Quote
10-30-2011 02:07 AM  6 years agoPost 10
jimmymc2286

rrApprentice

Commiskey, Indiana USA

My Posts: All  Forum  Topic

I have spend the last couple of days trying to get my Radical to run. The single cell lipo looks like it is going to work. At first all it would do was pop and back fire. The clutch came loose so out the engine came. Checked everything over and loctite went on everything I missed the first time. Let it dry overnight. This afternoon tried it again. Same thing, popping and backfire. Set both needles at 1 1/2 turns open and it would run for a couple of seconds then die. Set the throttle open just a crack, it ran for about 3 min. and died. It would start back after several tries same thing. This went on all after noon. Gave up and pulled engine again. Checked timing, removed clutch and checked pick up magnets. It sparks just before TDC. I pulled the carb and took it apart it was clean and looked as it should. I am running 87 octane with penzoil 2 cycle aircooled engine oil at 32 to 1 for the breakin, if I can get it to start and run that is. Going to try it again in the morning.

If anyone has any idea what I might be doing wrong or just not doing, please let me know. This is my first Gas heli. I have worked with and on gas engines most of my life but this is my first one with a CDI. I don't know if there is something I am not doing or something I am not doing right. Any help would be welcome.

Jimmy

Jimmy, If it looks like a heli I like it.

PM  EMAIL  Attn:RR  Quote
10-30-2011 02:33 AM  6 years agoPost 11
D Pedersen

rrApprentice

Rycroft .Alberta .Canada

My Posts: All  Forum  Topic

The low speed needle is very sensitive.A 1/16th of a turn is alot on it.I would guess if it is backfiring and will not take throttle without dieing,I would say you are lean.Another thing if you are using a electric starter with lot's of volts ,you can turn the engine to fast(engines just spines and nothing happens).Mine is this way,so I just give it little shots (burbs).The first start of the day my 20 may take a couple try's and I can occasionally get a backfire trying to start.Just take the low speed open a screw driver blade width at a time.That's all I have for you at this time.Hope it help's. Take care.

Logo 550SX / Rush 766 / TT E700

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
10-30-2011 02:48 AM  6 years agoPost 12
Billme

rrElite Veteran

MS

My Posts: All  Forum  Topic

Try doing what the FYI says, turn you low needle to 11/4 and the high 11/2 if this a stock engine...

Ditto on what d. peterson says about starting to fast...

PM  EMAIL  GALLERY  Attn:RR  Quote
10-30-2011 03:26 AM  6 years agoPost 13
jimmymc2286

rrApprentice

Commiskey, Indiana USA

My Posts: All  Forum  Topic

D Peterson, I was turning it over fast. Will do it in small short burst.

Billme, I started off at 1 1/4 low and 1 1/2 on the high, and moved the low needle open a very small amount at a time stopping at 11/2. In the morning I will start again at 1 1/4 on the low and see if it will go.

Thanks guys for the help. Will let you know how it goes.

Jimmy

Jimmy, If it looks like a heli I like it.

PM  EMAIL  Attn:RR  Quote
10-30-2011 06:25 PM  6 years agoPost 14
jimmymc2286

rrApprentice

Commiskey, Indiana USA

My Posts: All  Forum  Topic

Day 3, here is what I checked last night. fuel lines, tank clunk, spark timing, battery voltage, fan loose, ground and connections for CDI, removed the carb and isolator and checked it for flatness, ETC. Today for the last 3 hours I have been trying to start it. The samething today as yesterday. Cranking it in short burst all it will do is pop pop pop. I set the low needle at 1 1/4 turns out and the high at 1 1/2 out and it would start and run in a very slow four cycle for about 1 min. and quit. Then after a lot of short burst with the starter it would do the same thing again. If I moved the throttle or one of the needles just a sight amount it wouldn't start just pop and backfire. I am begining to think the CDI may be bad. I was using a single cell lipo but changed to a 4.8 volt 1800 mah nicad same thing. Then tried a 2 cell lipo through a regulator at 5 volts same thing.

I have no idea what to do now. I will call Century tomorrow and see what they say. I think the heli is going to be great, as for the engine right now I am not to thrilled with it, and without it the helicopter is useless.

Anyone with any ideas would be wellcome. From what I have read this has got to be something that can be fixed.

Jimmy

Jimmy, If it looks like a heli I like it.

PM  EMAIL  Attn:RR  Quote
10-30-2011 09:38 PM  6 years agoPost 15
D Pedersen

rrApprentice

Rycroft .Alberta .Canada

My Posts: All  Forum  Topic

I am just wondering if the crankcase is not loaded up.Have you pulled the fuel line off the carb and tried to get it running with just the fuel that is in the engine.I ran my engine on a test stand with a prop at first and it started first or second flip all the time.I then installed it in my heli and had a tough time that sounds alot like your situation getting it going.I remember just moving the throttle a hair would stop any firing .There was no problem really with mine ,just had to work at it a little to figure things out.It works great now.Very frustrating I know!

Logo 550SX / Rush 766 / TT E700

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
10-30-2011 09:57 PM  6 years agoPost 16
strat1960s

rrApprentice

San Antonio Texas

My Posts: All  Forum  Topic

Jimmy,

One thing I found was when I used a wand starter instead of the pull starter, it caused the clutch to back off just enough to rub on the clutch bell. Over time, I could not turn the motor by hand at all. I pulled the motor, tightened the clutch by almost 1 full turn and I could spin the motor by hand again. when I pulled on the pull start it fired up and I about left a deuce in my shorts. I wasn't expecting it to fire up so easily. Don't give up. It could be something simple like tightening down your clutch.
Keep at it and you'll get it.

Ted

I always have fun. Some times are more fun than others.

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
10-31-2011 01:35 AM  6 years agoPost 17
jimmymc2286

rrApprentice

Commiskey, Indiana USA

My Posts: All  Forum  Topic

Thanks everyone for your help. BK479 called me today to check on my progress with the Radical. I told him of my problems. He said I should find the thread on the fan installation and recheck my build. I did that and I think I found my problem. Instead of firing before TDC it was firing after TDC. Upon reinstalling the fan/magnets properly it is now firing correctly. I will try and start it again in the morning.

Once again I thank all who have helped me. And I will let you know how it goes.

Jimmy

Jimmy, If it looks like a heli I like it.

PM  EMAIL  Attn:RR  Quote
10-31-2011 02:45 AM  6 years agoPost 18
jimmymc2286

rrApprentice

Commiskey, Indiana USA

My Posts: All  Forum  Topic

it runs
My ignorance has no limit. I just tried to start the Radical after redoing the fan. It fired up and ran after the about 3 turns. It is very loud but runs like it is supposed to. Now the first thing in the morning I can start the break-in. Thanks again to everyone for their help.

Jimmy

Jimmy, If it looks like a heli I like it.

PM  EMAIL  Attn:RR  Quote
10-31-2011 07:44 AM  6 years agoPost 19
strat1960s

rrApprentice

San Antonio Texas

My Posts: All  Forum  Topic

That is great news.
I hope you enjoy breaking the motor in. I flew nothing but electrics for several years. It took a while to get used to the sound of the Zenoah motor. It's a fun heli to build and fly.

Ted

I always have fun. Some times are more fun than others.

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
11-02-2011 07:24 PM  6 years agoPost 20
ttaylor63

rrApprentice

Floresville,Tx

My Posts: All  Forum  Topic

Can i use a Life 3200 MAH pack to run the ignition & the receiver. I do this on my airplanes with an ignition battery elminator circuit. Just wondering if i can do this on a helicopter as well... Or whats the besy to power the ignition and receiver. I just dont like running 2 batteries..

PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 2 pages [ <<    <    ( 1 )     2     NEXT    >> ] 1901 views POST REPLY
HelicopterCentury Radikal G20-30 N640 Hawk Predator › will this work for Radical G20 ignitiion battery
 Print TOPIC  Make Suggestion 

 6  Topic Subscribe

Friday, April 20 - 11:16 pm - Copyright © 2000-2018 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online