CRRC Pro GF26I

[hardtop351]

	Quote: Originally Posted by wiz310
	I sure wish I wasn't away working when all this was happening........... seems I was to late to be the other "outside US" tester. I suspect this would have been a very nice engine for my glider tug Pawnee. I'll just have to buy one now I guess. Craig, what did you end up using on the 45 as a header pipe?. looks like copper in the pics. Jim, if you end up wanting to try any other engines..........I'm keen. cheers Wiz.

yeah it is wiz....3/4" 90 degree. and the plate is brass. Hammered it oval to suit the exhaust port.

cheers
craig

[GremlinX]

	Quote: Originally Posted by hardtop351
	i have found one thing so far after visually inspecting every last inch of this engine. guys can you all check where the locating dowels are on the crankcase for cracks. one of mine IS cracked...its cracked on the carb side. it may be a problem with leaking etc...but i will still run it and see if it does. cheers craig

Hmmmm

[GremlinX]

	Quote: Originally Posted by hardtop351
	something i've just discovered with this engine. i put the spark plug in the hole and tightened it up. as i turned the engine over by hand i noticed a noise. it appears to be a leaking front shaft seal in the crankcase housing. this also happened in my big 45 cc engine. i replaced the seal and cured the problem. just wanting the rest of you to know about the problem as well as the factory. cheers craig

Any word on this fix?

[GremlinX]

	Quote: Originally Posted by hardtop351
	speaking of spark plugs...... mine has failed. the ceramic insulator has come away from the metal body of the plug. you can turn the ceramic quite freely inside the body. i have ordered some NGK plugs so i can try to start this engine. the crankshaft has also gone tight so something isnt right there either. im thinking of disassembling this engine to find the source of the "tightness" a tight engine is a sign of something wrong. more to follow soon...... cheers craig

I am a little nervous about this... I am not bashing a product, but after reading about cracked crankcase or whatever, leaking seal, and now something is binding up in the bottom end... It seems like a great deal, but then I read this. Can you clear up what you have learned about this little motor? Thanks, please do not take this message wrong.. I am asking, not pointing fingers... thanks.

[mattbogy]

More raw video. I have enough footage now to edit a decent clip when I get some time. I'm not sure when to switch to synthetic on this engine. The rpm has increased 200-300 RPM to 8200-8300 on Xoar 18x6. Total of about 8ea. 10 min flights. Not sure how much time it ran on the stand beforre it was shipped.

[hardtop351]

gremlinx....

just to let you know that yes i have resolved all the afore mentioned problems with my engine. except for the very small crank in the crankcase.

the "tight" thing was found to be too much endfloat in the crank which has been cured.
the shaft seal was possibly an installation error due to no other engines having the same problem.

while you may have concerns about this engine let me once again say that this is the prototype that has been put out to a few select people for testing and evaluation. all the problems you have read about will be resolved by the time they are put onto the market.

cheers
craig

[TrikeFlyer]

GremlinX your concerns are are well taken. You should notice we have stated all along in this thread that these are not PRODUCTION engines for sale on the market but are preproduction PROTOTYPE engines for evaluation and debug B4 being placed on the market.

This shows the manufacturer is trying to take all the steps he can to assure a finalized defect free engine will be offered for sale once it is placed on the market. This is the same process Microsoft goes through with software by offering free BETA versions of their software B4 selling it on the market.

If you read these threads you will see the DL50 was shipped with exhaust mounting holes NOT TAPPED with threads, this IS NOT the way to gain customer confidence in a product. We should applaud CRRCpro group and Western Hobbies for taking this prototype evaluation process to ensure that future production will be defect free when eventually marketed.

I don't see you making any positive comments about the performance of this engine. You did however, misquote Hardtop about the cracked mounting lugs. What he said was the hole for the guide pin that locates the 2 crankcase halves was cracked. This is not a functional part of the engine, but an assembly aid in the manufacturing process and does not affect how the engine runs.

I received and tested one of these test engines myself and other than the ignition module problem, the engine itself has been defect free and has performed flawlessly for over 4 hours (see my prop test results).

Trike

[nicetie]

Hi Trike, My DL50 muffler mounting holes were threaded. The engine has been tested on dyno to have much more HP than the DA50. Mine runs great after I
replaced the wimpy mini choke servo I tried to use.

Ken

[GremlinX]

I understand, and that is why I prefaced my statement. If they are prototypes sent out for testing, I would not report ANYTHING to ANYBODY... honestly...

The vid you posted looked good. Seemed to have good power....

[TrikeFlyer]

Hey Nicetie is that you Cadillac Ken??? ( by the way I never seen you wear a tie )Happy to hear you got the choke situation cleared up.

You evidently received an engine (DL50) that went thru a complete QC unlike the guy who reported his had one muffler mtg hole unthreaded. No doubt your engine runs good, but my point is these littlle problems that don't get caught in this Chinese factory's QC process gives all Chinese engines a bad reputation.

Once the Chinese factories get their internal QC and final inspection up to the same level as their casting and machining ability they will own this RC engine business.

Trike

[Jaybird]

Lets hope not.

[TrikeFlyer]

GremlinX I may have miss spoken when I called these engines prototypes. They may better be called
pre-production engines. Just Like Microsoft issues BETA versions of its software to end users so they can try it out and kick around to see if they can find anything thats needs improving B4 releasing for mass production, CRRCpro decided to have some random selected end users try out this new engine and report GOOD or BAD what they experienced using this engine B$ they make a bunch of them and sell on the market.

A recent review by a major RC magazine comes to mind of a gasser made in Brazil where the manufacturer supplied the magazine a preproduction engine to the magazine for review. Several issues with the quality were noted by the reviewer and unless this manufacturer is brain dead, these issues will all be corrected on subsequently produced engines.

This is how our hobby makes progress and our suppliers stay in business so they can offer us a quality product at a reasonable price.

Trike