CRRC Pro GF26I

[edwal07]

	Quote: Originally Posted by 2robinhood
	It seem that everyone is using regulators with 6v packs. I actually ran a 6v unregulated on my stock auto advanced CRRC ignition. My second 26cc, I ran a 4.8v 2500mah battery and had no issues, but the 1st one needed the 6v pack. I just seems that issues come up when a battery starts to get around 4.8V. A 6V battery on a regulator can stay at 5.2 - 5.5 volts for a long time. A 4.8v pack starts draining from the 5.2v - 5.5v as soon as it is turned on. I know I had to keep mine above 5v to run cleanly. You could tell when it was low on voltage, it would become hard starting and pick-up a miss in higher rpm's.

That's what I was talking about in my last post about using the 6v with a regulator. I have seen 2 or 3 engines where guys were complaining about a high end miss at wot, like a popping, but everything was set and nothing adjusted after a good flight.
I found that they will hit but not start below 4.9 volts, or start and then quit in the middle of a flight. That is why I went to 6v and a regulator. I am using Spectrum in my planes and am going to 7.2v LiPos with regulators, one to make sure I have no problems with the Spectrum Receivers and to end the engine problems due to low voltage. I have not had any problems as I check voltage prior to each flight and charge the ignition battery after every 3rd flight.
You are correct as the voltage on a 4.8 starts about 5.34-5.39 on a fully charged battery and goes down hill from there, the ignition draws about 700ma at wot so it does not take long to drop, even if you are using a 2000-25000ma battery.
I think 7.2 Lipos or 6v packs with a regulator is the best way to go.

[joseae]

I think what you guys have said kind of makes sense since lately I can get my engine to start with the 4.8v pack but after the first run it becomes almost impossible to start with the same pack. There has been a couple of times when in the middle of struggling to start the engine I have temporarily switched to my receiver's 6v pack and the engine starts right away. Now the question is, how come this was not happening before? I have been using the same 4.8v pack from the beginning and was able to fly 4 or more times with no issues. I tested my battery pack and at least, as voltage is concerned, it seems to be OK. So, in conclusion (???), something must have changed here, either the battery pack's capacity has diminished or the ignition has become more demanding. I know it does not make sense, but that is all I can conclude from all this. Could it be a matter of amps and not volts? My next step will be to try a higher capacity (mAh) 4.8v pack and if that does not work then get me a 6v pack with a regulator. What kind of regulator are you guys using?

[3Dguy]

Mines running fine on a 2500mAh 4.8v pack.

[2robinhood]

My 1st 26cc needed 6v packs, and I ran them unregulated.

My 2nd 26cc I ran 4.8v 2500mah pack and never had an issue.

[rcign]

Ah, progress..
for 20 years we had igintions that ran for 2 hours on a 600ma 4.8V battery...NO problems, they just worked..
Now we have Lipos, hydrides, A123s etc....
Special chargers, regulators etc....
Ignitions with leds, cutoff features, automatic chokes, etc.....
When you people get tired of screwing around with all these high dollar special ignitions and want something the works all the time, takes no special chargers, and is relatively cheap, you know where to find them....AND they're guaranteed...RC ignition.com and C&H...We both have been around for over 20 years, longer than some of you "newbies" have been flying....We started with mechanical advance ignition, later when the technology came about, had electronic control...You need NOTHING else in an ignition..
Something to be said for the K I S S principle...

[3Dguy]

Should I be ashamed of my youth?!

[joseae]

	Quote: Originally Posted by 2robinhood
	My 1st 26cc needed 6v packs, and I ran them unregulated. My 2nd 26cc I ran 4.8v 2500mah pack and never had an issue.

Why you talk about them in past tense? What happened? Did you try to run the first one on 4.8 volts? This is driving me nuts. I just tried a different 4.8v and it will fire up a few turns and stop. As soon as I replace it with a 6v it runs more or less normally. Now what could be happening? Is the ignition going bad? Should I buy a new ignition or just a 6v pack?

[ken crane]

he has out grown our little planes lol hes a giant guy now !

[ken crane]

	Quote: Originally Posted by rcign
	Ah, progress.. for 20 years we had igintions that ran for 2 hours on a 600ma 4.8V battery...NO problems, they just worked.. Now we have Lipos, hydrides, A123s etc.... Special chargers, regulators etc.... Ignitions with leds, cutoff features, automatic chokes, etc..... When you people get tired of screwing around with all these high dollar special ignitions and want something the works all the time, takes no special chargers, and is relatively cheap, you know where to find them....AND they're guaranteed...RC ignition.com and C&H...We both have been around for over 20 years, longer than some of you "newbies" have been flying....We started with mechanical advance ignition, later when the technology came about, had electronic control...You need NOTHING else in an ignition.. Something to be said for the K I S S principle...

this guy cracks me up ! at first i thought him as arrogant and chalenged him,then i started to watch and learn from his posts then i came to realize the guy is a smart sob. hes right in 99.9 percent of his comments. learn from his years of exp. i dumped all the lipos regs ect and went back to the simple kiss theory. addeed 2 batteries 2 switches and left all the advances to the others and i am much happier and more money in my pocket to buy fuel. thanks rci! btw the rci ignition on my crrc 50 works just fine !!!

[3Dguy]

I've been using the KISS method for a long time, but it's a more redneck version...

[2robinhood]

	Quote: Originally Posted by joseae
	Why you talk about them in past tense? What happened? Did you try to run the first one on 4.8 volts? This is driving me nuts. I just tried a different 4.8v and it will fire up a few turns and stop. As soon as I replace it with a 6v it runs more or less normally. Now what could be happening? Is the ignition going bad? Should I buy a new ignition or just a 6v pack?

As Ken said, I went with two 100cc planes only.
Everytime I went to the field, I only took the 50cc and 100cc planes ( mostly the 100cc plane ).
So I decided to sell everything off and only have two 100cc planes.
Cut way down on items needed to support the planes also.
Same props, sparkplugs, mufflers, wrenches, etc.
No I have four props , two on the planes , two as back ups ( not 15 or more ).

On my first 26cc my box and manual said 4.8 - 6 volt packs.
I started with a 6 v Nimh pack. Then newer engines where coming out and the manual and box said to use 4.8v packs only. So I went to 4.8v packs, incase a 6v pack was damaging the ignitions. On the 4.8v packs I got two flights and started to have troubles. I did everything you guys are doing ( needle adjuments, plugs, carb cleaning, new fuel lines, clunks, etc ). The next flying season it would run fine again, two flights later the problem was back. Well the 4.8V pack was recharged the night before going flying. I traced it back to the battery, when ever the battery got to about 4.9v it started to act up. The lower the voltage went the worse the issues got. It would even get to the point it would not start and the would still be 4.7v - 4.8v on a meter. I put the 6V pack back on and never had a issue again.

[2robinhood]

I am only saying to regulate the 6V battery is for a some reason CRRC is saying only use a 4.8V battery.
I don't want anyone to burn-up an ignition.
But, I did run mine UNREGULATED and never had a problem and I put about ten gallons throught the engine.
The code on the bottom of THIS ignition was August 2007 , version 01.

[hardtop351]

	Quote: Originally Posted by rcign
	Ah, progress.. for 20 years we had igintions that ran for 2 hours on a 600ma 4.8V battery...NO problems, they just worked.. Now we have Lipos, hydrides, A123s etc.... Special chargers, regulators etc.... Ignitions with leds, cutoff features, automatic chokes, etc..... When you people get tired of screwing around with all these high dollar special ignitions and want something the works all the time, takes no special chargers, and is relatively cheap, you know where to find them....AND they're guaranteed...RC ignition.com and C&H...We both have been around for over 20 years, longer than some of you "newbies" have been flying....We started with mechanical advance ignition, later when the technology came about, had electronic control...You need NOTHING else in an ignition.. Something to be said for the K I S S principle...

here here buddy!!!!!

i TOTALLY agree with you on this!!!!
bring back the old exposed points and coil setups.....simple....effective....and they WORKED!!!!!

my 26 will be getting my mods to make it work....will keep you posted

cheers
craig

[hardtop351]

	Quote: Originally Posted by Noddy
	Your first solution to the interference problem seems a little extreme, doesn't that take away the point of using petrol for economy , but as you say that's another story for another time. I have posted about interference myself. I was using PCM and had horrendous problems in as much that all was well with the engine off but as soon as I started it the control surfaces went whappy. My final solution was to switch to 2.4 gig Spektrum and what do you know, 100% reliability. Since the swap over I have not had so much as a twitch, all my problems have vanished. Could it be that the RF noise from the CDI isn't strong enough to swamp the 2.4 signal ?

who cares about economy????
it seems that ever since large spark ignition engines became popular it seems that nothing else is as good as them.
i modded my engine purely as a simple and inexpensive way of getting the results i was looking for.
my 26 will be going the same way.

yes i know there are reliable ignitions out there as rcign has pointed out. yes i know they aren't THAT expensive........but i like being that little bit different.

just so you all know.....my 45 uses about 1/2 a 16oz tank of fuel for a 15min flight....and most of the flight is at full noise.....with the smoke on too!!!!

cheers
craig

[3Dguy]

I burn 4 oz/15 mins for an average 3D flight with my 26.