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| Large Engines Discuss Engines Used on Giant Scale Aircraft. Gas/Glow, as long as they're big! |
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08-15-2014, 05:51 PM
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#1 |
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RCC Master Contributor
I am: Rick K.
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DLE 35ra, black plug
Feel kinda bad posting here, it ain't a big motor anymore!!
 (hey it's all I got((for now))But I have a DLE 35ra that runs great, 50 flights on it, it has the bowman ring, A real cm6 plug. A canister. A menz 20x8 prop. Tachs out at 7760~7800, idles at 1600~1700. No black snot blowing out the pipe. Otic2 oil at 32 to 1. But why is it when I look at the plug it's oil covered black? I know that a good running motor should have a tan colored plug. So am I still on the rich side? It don't run like it is! Last time I tried to lean it out it sagged. Is it just the way this motor is? Also wondered that when I changed the ring, the top of the cylinder head almost had a flower pattern scorched into it. Like perfect pedals all the way around. I should have taken a picture. My DLE 30 did not have that. It just had a bit of carbon build up.
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08-15-2014, 07:00 PM
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#2 |
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Re: DLE 35ra, black plug
Depends on oil
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08-16-2014, 08:51 PM
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#4 |
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Re: DLE 35ra, black plug
you might be heavy on da mix!!!
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08-17-2014, 08:36 AM
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Re: DLE 35ra, black plug
Should be able to run 40 to1 mix in it. Also a cold plug will do it. Running a lot at half throttle will also do it as the motor doesn't run hot enough. A hotter plug will help here too.
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08-17-2014, 05:55 PM
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#6 | |
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RCC Master Contributor
I am: Rick K.
Join Date: Jan 2008
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Re: DLE 35ra, black plug
Quote:
Rick
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08-21-2014, 08:01 AM
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Re: DLE 35ra, black plug
I'm not a professed expert, but there's lots of chatter on F/G and similar sites about using lots of oil on our DLE's and other Chinese engines. 30:1 to 35:1 seems popular.
The bearings will take kindly to the extra oil. My DLE30 is 4 years old now with many hundreds of flights on it running 35:1 synthetics. So I wouldn't worry about it if it runs well. Maybe just change the plug out once in a while. BTW I find you can clean the plugs up pretty well with a little scraping, and a good blow-out with WD40. (if you really want to...) You can try leaning in the top end 1/16 at a time and see what happens if you wish...but don't go too far. |
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