CRRC Pro GF26I

[joseae]

Got it. Thanks.

[babsvdmerwe]

Hi my name is Andre from South Africa and I need help with my crrc pro gf26i. I have been flying it for about a month and a half every saterday and sunday without any problems but on my last flight after i had refueled it would not start. I recharged the 6volt battery to 7.49v and found that it only had spark on the first rotation of the prop and on Switching off the ignition.
Thank You,
Andre

[ken crane]

	Quote: Originally Posted by babsvdmerwe
	Hi my name is Andre from South Africa and I need help with my crrc pro gf26i. I have been flying it for about a month and a half every saterday and sunday without any problems but on my last flight after i had refueled it would not start. I recharged the 6volt battery to 7.49v and found that it only had spark on the first rotation of the prop and on Switching off the ignition. Thank You, Andre

not saying this is the cause but i was warned that a fully charged 6 volt battery putting out what it should like yours can and will damage the ignition module. the rating is 4.8-6 volt not accounting for the hot charge. we were all told to run the ignition on 4.8. also the major ignition companies have shown the discharge rate at equal rpm,the 4.8 lasted 1/3 rd longer than a 6 volt. take a new plug (remove the one from the head) and rock the prop past the hall sensor and see if you have spark from the plug . also look at the magnet in the prop hub to see it has not moved from flush. air gap is important. if no spark after the this the module may be toast.

[zool.on]

Hi,

I have the 45 and the 26 and they seem to be running fine. But I have a few questions about the 26.
What replacement plug are you all useing? I do not trust the tourch plug that it came with. Oh and by the way I got my 45 and 26 from Ray both have the RCEXL ignition. I ran the 26 for about two hours yesterday @ 30:1, first 40 minutes about 2500 to 3500 RPM then the rest was between idel and 5500 RPM with sort bursts at wot. At this time I am running the SY 16X8 and I peaked the high end to about 8600 RPM and then backed it off a little. Now my second question is, should holding the plane up vertical affect the engine like a glow two stroke? I was always under the impression that due to the pump in the carb the engine would not go lean. I found I had to richen the high end twice as the engine was going lean when I held the plane up vertical, is this normal? My third problem is the engine going lean in flight at just under half throttle, but this I think this might be a fuel problem as on each flight when this happened I found when I landed there were air bubles in the fuel line so I will take a closer look at the tank set up.

Now for my impression of the 26. Ray warned me it might be a little hard to start by hand before it is broken in. I found it took a while to get the fuel to the carb on firt run, about 20 flips or so but once the fuel was there it started in 5 flips 3 with choke till it poped and 2 after that with the choke off and it was running fine. In my two hours of break in I ran it for the fist three tanks at ten minutes and then let if cool down and so on in ten minute cycles. after that I ran it to half tank (14 oz tank) and then let it cool off and so on for the rest of the time. By the end of the time I leaned out the low end just a little about 1/8 and was able to have a good idel between 1850 and 1950 RPM and was getting 8600 on the high. But I did end up haveing to richen up the high end today.
As for performance I found a used Funtana X (100) that I mounted the engine on and this seems like a nice combo. I was only able to get two flights in today but it seemed to have unlimited vertical and ran nice over all other then my mid range problem that I think is due to a fule tank or plumbing problem.

My 45 has no problems at all and is pulling my old 16Lb bipe with ease, so over all I am very happy with these eniges and would recomend them to any one lookeing for a good engine at a good price. I am verry happy with my dealings with Ray as well. He is only about 20 minutes away from me so I picked up my engines in person and am happy with his service.

[edwal07]

Hi,
I have been using the NGK CMR7H stock #3066 with great results. I have 3 of the CRRC Pro GF-26i engines and have had nothing but good luck with them.
The only thing in your post I am concerned about is your fuel mixture. They recommend 26:1 for break in, I ran 20:1 for 4 tanks dropped to 26:1 for another 4 and now I am running 93 octane gas with Sthil Ultra at 40:1 which is a fully synthetic bio-degradable oil. All three run like champs and extremely easy to start. After about 8 tanks they all start easily by hand.
A word of warning and I learned this from experience, choke the engine for at least 12 revs by hand prior to starting with an electric starter, make sure you have gas at the carb. Otherwise you will kill the ring and your compression.
I have over 50 flights on my engines with no problems, there are over 15 engines in my club and everyone is happy with them. They run great right out of the box. Wait until you get 4 or 5 tanks thru them before you start messing with the needles, allow them to break in.
Also I only test ran them in the plane to check for throttle response, idle and high rpm before flight, then flew them like I would normally fly all my other planes, but use common sense and not fly them at wot for the whole flight. Fly it like you would drive a new car, get it up to speed, throttle back, pull hard, throttle back, cycle it like you would on the ground. This way you are breaking it in on operating conditions in flight, not static on the ground.
Best all around props 16X8 and 16X10 APC.
Ed
Here's my SuperChipmunk and 25% J-3. I have the other on an Ultra RC Katana Extreme which at 11.5lbs is a flying Circus with the 26.

[edwal07]

Hi again,
Didn't mean to be long winded. Anyway wanted to comment on your fuel problem.
I found that by increasing the fuel tubing in the tank to 5/32" is the best way to go, also use the Large clunk or drill out the smaller ones to match your fuel tubing ID.
You should not have any air bubbles in your lines, could be the tygon on the smaller 1/8"ID tubing at or in the fuel tank. The 5/32" tubing will give you plenty of flow to the carb. You should not lean out in any position with the pump on the carb, also check to make sure the screws on the pump cover is tight.
Another point, there have been issues with the magnet coming out of the thrust cone on the 50CC for the electronic ignition hall sensor. The fix is to "stake" the magnet in place by using a small center punch and lightly putting a punch right next to the magnet which will push a small bit of metal into the magnet to help secure it, also a drop of thin CA for the finishing touch. If it is loose and easy to remove then use a small dab of epoxy to the end before reinstalling. Just for insurance I have made this modification to all my engines.
Ed

[rcign]

Fuel tubing size is one of the myths floating around on these forums..Large diameter fuel tubing is in no way needed on ANY gasser...Hayes molded neoprene tubing from Tower Hobbies will run ANY gasser now sold....The little hole in the carb at the tip of the inlet needle is less than .060 diameter...A garden hose connected to the carb won't pass any more fuel than the Hayes....If you need large diameter tubing you have a problem somewhere else.....
My test stand fuel tank has Hayes tubing hanging in the fuel 24-7...I can't remember the last time it was changed, it's still as flexible as when it was put in...It does not deteriorate in the gas sold here in Arizona....I run 3W 170s on the stand and have 0 fuel problems...

[zool.on]

Hi,

Thanks for the info. I don't think it is related to the size of the tubing as it is the same as my old Q52 and my CRRC45 that seem to run with no problems. I did find two problems that I hope will have solved the probelm but I have not had time to test it yet. I wanted to get flying with this engine fast so I got the Funtana used, I must say as well I do not want this to sound like a slag toword the person I got it from this was 100% my fault. After a closer look I found that the custom tank tray they had installed came lose. The tay is held in with two wood screws and one came out letting the tank move around a lot. I think this was causeing the fuel to foam and this is what was causing the bubles in the line and the cause of the lean running. I removed the tray at one point and I must have not put it back in correctly. The second problem I found was the fuel filter. I can't remember the make but it is not one of the DuBro ones I would nomaly use so I had a closer look at it and found it to not be all that tight. I did not notice this when I installed it. It has some sort of o-ring between the two halfs and I could turn it about half a turn tighter. I did ask when I got it if it was safe to use with gas and was told it was ok. I just hope it's not the o-ring swelling and shrinking from the gas. I hope to get out this weekend and see if this solves the problem.

As for the fuel mixture I had asked Ray if it was ok to break in at 30:1 and he said it would be fine. He just said to not run it that had at first so for the first hour I did not run over 5000 RPM for more then a few seconds mostly at about 2500 RPM on the second hour I ran it between 5000 and wide open but not wide open for longer then a minute and for my test flying I was at just over half for most of the flight. I will run at least 4 to 6 liters more through the 26 and 45 begore I go to 40:1 and then just check the plug at the end of each day to see how it looks to see if it is still a little rich or too lean.

edwal07 how do you find the performance with the chipmunk? A friend of mine has the same one and was looking for an engine so I told him about the CRRC26 and we were wondering how if flys with that engine?

[gazzajp]

Havn't been here for a while, thought I'd share my experiance with this engine.
The thing is awesome, a real screamer. Everything is stock, still running the torch plug too. Havn't had to touch the carb needles either. Funny thing I did try the NGK plug but it ran like crap? So the torch will do for now. It's a pitty some are having so much trouble with these engines, but thats how it is I guess. That's where these forums are so good to help.

[Noddy]

	Quote: Originally Posted by gazzajp
	Havn't been here for a while, thought I'd share my experiance with this engine. The thing is awesome, a real screamer. Everything is stock, still running the torch plug too. Havn't had to touch the carb needles either. Funny thing I did try the NGK plug but it ran like crap? So the torch will do for now. It's a pitty some are having so much trouble with these engines, but thats how it is I guess. That's where these forums are so good to help.

With you 100%. Mine has still only had 3/4 gallon of petrol through it and it runs like a dream. Like wise I have not touched the needles yet, it throttles great and pulls my Extra round the sky like a missile on a JXf 17x8 prop. I'm definately loving it.

[Wilki01]

I'm having a bit of trouble gettting my CRRC Pro 26 running right. I set needles at factory settings and it doesn't run all that well, as expexted. I set the high for just under max rpm and idle at a good reliable idle of about 2150 or 2200 rpm on the ground all is well nice smooth transition. I take off get up to a good attitude and and well it starts to stumble between 1/4 throttle and 3/4. I try running a little ritcher, no good, try leaner no good. With the cowel on or off no diff.. I've pulled the tank out took apart no problems there. I can run it on the ground for an hour and no problems, as soon as it is in the air midrange gone for a holiday. I am running this in a Funatana X100 with a 17-8 APC prop. Feul oil mix is 32:1. It starts well. Stock exhaust. Tested for air leaks no problems there, got me stumped so far. I'm at about 1100 feet above sea level, Shouldn't be an issue, also using an NGK plug, Tygon fuel line. Next I thin I'll take the carb off and check it out completely, pretty sure it's a carb issue. Anyways any help would be great. Yes I've read the forums, for those who just want to direct me back to the forums and thanks in advance for those who help. I know it is something simple just being fussy. lol Again Thanks



Wilki

[JeffElecRC]

Update on my engine:

I'm up to over 50 flights now. Best performance I'm getting is 7900 rpm on a 17x8 prop. Idle is around 2300-2400 rpm. I retarded the timing by moving the sensor towards the carb, but I cannot hand start it no matter how much I try. I prime flip 'till it fires, then choke off and flip a few more times, but best I get is a weak turnover.

Anyway, I'm frustrated that I don't get the performance you guys get. Maybe I got a lemon. I think this engine is getting the boot after this season. It can't even pull a decent vertical with a 9lb 13oz aircraft. It's a dog compared the Evolution 26. Next, I will try a Brillelli 26.