CRRC Pro GF26I

[ken crane]

	Quote: Originally Posted by joseae
	Has anyone experienced a high pitch noise coming from the front of this engine. It comes as the engine warms up and is more noticeable at idle. Sometimes it varies in pitch. I have 4 flights on my Yak 54/CRRC 26, it seems to be running very rich, 4 stroke style. After sliding the sensor to the right that seemed to improve, but the high pitch noise is getting worse. I noticed it gets quite loud and then the engine dies. Could this be metal to metal? Or maybe ball bearings? Maybe this is part of the problem of not being able to idle below 2200 rpm. I am also still having issues with rc interference affecting mainly the throttle servo, but that I can take care of. Any suggestions? (other than contacting CRRC). I have been using a Xoar 17/6, 40:1 gas mix and a 1200 mA nickel metal for ignition.

first off interference did you make sure the plug cap is as tight as it can be and did you dump the torch brand plug for a ngk or like? can you make a video with sound of the noise? by moving the sensor you are advancing or retarding the timing. this could change the sound of a bad or failing berring as you change the fire point. hearing it would be a better method to help.

[Noddy]

I don't want to hijack this thread, however getting back to the original topic, I recently bought one of these little gems. In fact tonight was the first time it ran. I'm totally new to petrol engines having flown predominantly glow and electric models for the past 30 years. I have been lurking and following this thread with great interest particularly having just purchased this motor. The largest motor I have owned was a Super Tiger ST2000/25 some years ago and it was a lovely motor to live with, albeit a little thirsty but it was running on straight fuel so not so expensive. Anyway back on track, I was somewhat intimidated at the thought of starting this engine, but it was a total anticlimax. It backfired once or twice (throttle open too far), even spitting off the prop on one occasion but that was my fault for not being firm enough on the spanner. (Having read this thread I didn't want to be too enthusiastic and split the prop driver). Once tightened correctly she was running withing half a dozen or so flicks. It sure looks like I'm not going to be short of power on this model (Seagull Extra 260 63"), it pulls like a steam train. I haven't adjusted the needles they are exactly as set in the factory and give a nice throttle response from a reasonably low idle to full power. Currently I'm running on a 25:1 fuel oil mixture so she's a little oily but at least she's well lubricated. I'm now really excited at the prospect of the maiden. I'll keep you all posted on the outcome.

ATB

Paul

[ken crane]

hello everyone viewing this thread. this has been most intresting as we have now found more fraud being spewed here. when you read a post and it looks fishy, smells like fish and is slimy like a fish, its probably a fish......

[2robinhood]

	Quote: Originally Posted by ken crane
	hello everyone viewing this thread. this has been most intresting as we have now found more fraud being spewed here. when you read a post and it looks fishy, smells like fish and is slimy like a fish, its probably a fish......

True, True, True.

Hey Sleepy, please keep an eye on the IP addresses of these new members that are chiming in on the CRRC and XYZ engine thread.

RConlysite has gone under three different names ( that I know of ) and is playing games trying to drum up buisness for himself.
Name #1 = dealinrc
Name #2 = stuntal54
Name #3 ( I can't remember ).

These ( CRRC ) great engines, BUT he is misleading everyone that reads Flyingiants.com
Let's hear real reports from guys that rally have the engines.
Ken and I both have the 26cc and 50cc and they scream.

This guy is one major TROLL.
If he's a creep like this on these sites, how is he in person.
Would any of you buy from a guy like this??????? Not me...........

[joseae]

	Quote: Originally Posted by ken crane
	first off interference did you make sure the plug cap is as tight as it can be and did you dump the torch brand plug for a ngk or like? can you make a video with sound of the noise? by moving the sensor you are advancing or retarding the timing. this could change the sound of a bad or failing berring as you change the fire point. hearing it would be a better method to help.

Plug cap is tight and I am using the NGK plug. The noise it was making is more like a bass flute, low whistling sound. It just seemed to get louder last time and now it won't even start. It has a good spark and I can see it draws fuel but it just refuses to fire up.

[FLZman]

	Quote: Originally Posted by 2robinhood
	This guy is one major TROLL. If he's a creep like this on these sites, how is he in person. Would any of you buy from a guy like this??????? Not me...........

Unfortunately, I found out the hard way but to answer the question above.........NEVER AGAIN IN A MILLION YEARS! Fortunatley, Ray from PRC stepped up to the plate to right the wrongs done to me by this creep.

Z

[FLZman]

	Quote: Originally Posted by joseae
	Plug cap is tight and I am using the NGK plug. The noise it was making is more like a bass flute, low whistling sound. It just seemed to get louder last time and now it won't even start. It has a good spark and I can see it draws fuel but it just refuses to fire up.

Joesae,

Did you buy it from one of the dealers outside of Florida? If so, I think at this point I would send it in and let it get diagnosed, something sure sounds not right. Or, you are about a hour from here, you are more then welcome to bring it and the plane to our field and we can look at it and probably diagnose the problem but just by your description, this sounds like it will need some part(s) (most likely bearings but just a guess without hearing it) to fix it. Who knows, it may be something simpler. Just let me know if I can help.


Z

[FLZman]

One other question, how is the compression? Has it changed any since the sound started?

Z

[3Dguy]

Okay, I have most of the bugs worked out, but I think I've found the last one!

The engine runs fine on the plane while level, but when I pitch the nose vertical, the engine doesn't run the same. The RPM fluctuates, and it goes lean, and sometimes, it quits. The high speed needle doesn't seem to work as I can open it to about 3.5 turns and the rpm is the same as 1.5 turns out (while the plane is level).

This is how I tuned it.
-Peak the high, and richen 100 rpm (hard to do since the needle doesn't really respond)
-Lean the low until it won't transition, and then richen it just so it does, then go 1/16 more. (the low needle works pretty good)
-Retouch the high end (again, kinda hard)

I thought the carb was supposed to pump fuel. Is this a tuning problem? Sending the engine to Ray is a last resort, but he is a nice guy.

[krayzc]

3d send it in the carb sounds stopped up (ports)

[Noddy]

	Quote: Originally Posted by ken crane
	hello everyone viewing this thread. this has been most interesting as we have now found more fraud being spewed here. when you read a post and it looks fishy, smells like fish and is slimy like a fish, its probably a fish......

I hope this post isn't aimed at me. I have to say though that I bought this engine before I found the Giants web site. When I found this thread and started to read I honestly thought I had bought a dog. It's very difficult as a new board member to differentiate the good guys (yourself obviously and 2robinhood to name but 2) who give honest and clear information and trolls. I have merely pointed out my findings on my engine using stock settings and all the supplied equipment from the model shop. by the way I am using a JXF 17x8 prop. I have been doing more running tonight prior to the test fright and from my findings it seems to be getting a lot easier to start. I am using only a 1400MaH 4.8v pack for the CDI. Performance up to now seems perfectly adequate and not as noisy as I anticipated it would be. So far I am a very happy chappy.

Best Regards

Paul

[joseae]

	Quote: Originally Posted by FLZman
	Joesae, Did you buy it from one of the dealers outside of Florida? If so, I think at this point I would send it in and let it get diagnosed, something sure sounds not right. Or, you are about a hour from here, you are more then welcome to bring it and the plane to our field and we can look at it and probably diagnose the problem but just by your description, this sounds like it will need some part(s) (most likely bearings but just a guess without hearing it) to fix it. Who knows, it may be something simpler. Just let me know if I can help. Z

Thanks for the invitation. Yes one thing I noticed is reduced compression, the prop when flipped does not kick the way it used to. I bought this engine from Maxford USA as part of an airplane/engine combo. I have been trying to figure this thing out, looking at the schematic there are not that many parts to deal with. I would take the carb out of the equation, even though it may be leaking air through a small crack in the plastic spacer, that in itself would not cause the engine not to start. I am almost positive there are no issues with the electronic parts, I get a good spark and batteries are good. That leaves out what? Bearings, piston, ring? Maybe timing? At this point I am corresponding by email with MaxfordUSA and other venues to try and solve this problem. Funny thing is I ordered an Airtronics 2.4 radio to minimize radio interference caused by the little gasser and now (don't know how long) there will be no gasser.