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Old 10-04-2013, 02:42 PM
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Originally Posted by ericb View Post
Interesting.
I think it has those super tiny plugs, maybe a different cap style maybe? Cool little engine either way.
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Old 10-04-2013, 10:00 PM
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Thanks. I did not know that the caps turned to lock. You may have just saved me from a dead stick!
Had a senior moment and said VV 20 Is VV 40 1/4x32 that I have about 20 flights on.
Grumpy no two. BCCHI.
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Old 10-04-2013, 10:07 PM
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Originally Posted by terryscustom View Post
I think it has those super tiny plugs, maybe a different cap style maybe? Cool little engine either way.
Mine does have the 1/4-32 plugs.
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Old 10-04-2013, 10:09 PM
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Originally Posted by ericb View Post
If it is an RCXL unit, then it doesn't lock on. The ring is what keeps it on.
Now don't tell me that. They do turn and lock on.He uses the Mc Danial ,what they call the J-lock
Like the Mc D glow plug lock.Look at one closely and you can see why it is called the J- lock and
how it works.If it does not turn and lock it will fall off.Uses no lock or snap ring.
Grumpy no two. BCCHI.AMA 2500
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Old 10-04-2013, 10:15 PM
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Now don't tell me that. They do turn and lock on.He uses the Mc Danial ,what they call the J-lock
Settle down Grumpy no two, probably did not know they used the 1/4-32 plugs.....not many do and the CM-6 plugs used my 99% of all other engines do not lock on with a J-lock.
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Old 10-04-2013, 10:33 PM
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Originally Posted by bcchi View Post
Now don't tell me that. They do turn and lock on.He uses the Mc Danial ,what they call the J-lock
Like the Mc D glow plug lock.Look at one closely and you can see why it is called the J- lock and
how it works.If it does not turn and lock it will fall off.Uses no lock or snap ring.
Grumpy no two. BCCHI.AMA 2500
So it is an rxcl with mc daniel plug boots?
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Old 10-04-2013, 10:38 PM
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Does anyone know which plug cap goes to which head?

Also, for those interested in the VVRC 40 with CM-6 plugs an how it fits in a EF 78 I have posted my preliminary results in the EF 78 thread.
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Old 10-05-2013, 05:32 AM
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Does anyone know which plug cap goes to which head?

Also, for those interested in the VVRC 40 with CM-6 plugs an how it fits in a EF 78 I have posted my preliminary results in the EF 78 thread.
Plug leads can go to either plug,doesn't matter. Both p;ugs fire at the same time.
BC
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Old 10-05-2013, 05:33 AM
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Settle down Grumpy no two, probably did not know they used the 1/4-32 plugs.....not many do and the CM-6 plugs used my 99% of all other engines do not lock on with a J-lock.
Sorry,BC
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Old 10-05-2013, 10:00 AM
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I would have looked at the 78 thread if there was a link.
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Old 10-05-2013, 10:01 AM
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https://www.flyinggiants.com/forums/...ad.php?t=48118
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Old 10-05-2013, 10:59 AM
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Thanks for the info on the firing order. I had assumed their was two compression strokes in the cycle. It seems odd to me that both cylinders would fire at the same time. But, I guess I am not much of an engine guy.

Sorry I did not post a link, I thought it was best to put the EF 78 stuff in that thread. I don't have photos yet, but will document my progress in a couple days. I am spending the weekend at my cabin in the mountains with my new grandson.
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Old 10-05-2013, 07:51 PM
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Thanks for the info on the firing order. I had assumed their was two compression strokes in the cycle. It seems odd to me that both cylinders would fire at the same time. But, I guess I am not much of an engine guy.

Sorry I did not post a link, I thought it was best to put the EF 78 stuff in that thread. I don't have photos yet, but will document my progress in a couple days. I am spending the weekend at my cabin in the mountains with my new grandson.
I no,but it has to be this way.
All two stoke twins with a common crankcase both cyl fire at the same time. .....
BCCHI
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Old 10-05-2013, 07:54 PM
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So it is an rxcl with mc daniel plug boots?
They are RCEXL caps and boots but I sure he got the Idea from the McDaniel glo plug igniter.
BCCHI
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Old 10-05-2013, 09:18 PM
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Maidened my 78" EF Extra with this engine today and it ran flawlessly. Great power on the low end and revs out nicely. VVRC set it up perfectly. I have not touched the needles. I'm imperssed!
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