enya25cl

i was thinking of trying one of these new enya25 cl version on super clown has anybody tryed one yet if so what set up prop ect.

Brad,
I have been running an Enya .25
for several months now. It ran very
well in its stock form. I've run it
on a Buster, Ringmater, Twister and
a flite streak. It runs very steady
and has excellent power.
I have been running Enya engines for
many years. they are built very well
and will last forever.

I guess everyone has different experiences. I only bought one enya, a 15-5 and I will never ever buy an enya again. I am not the only person of that persuasion.

The one I have is US because the sleave distorts and binds on the piston whenever the head is tightened down (a common problem). The NV adjustment is way too course to tune the motor properly. The sleave does not seal on the crankcase seat so fuel leaks between the sleave and cylinder, coming out under the head.

The casting and finishing is rough though all the machining is very good to exceptionally close tolerances hence the rep for long life.

OK it is not the same model your are considering but this experience has turned me away from enyas for life.

I enjoyed Enyas way back when 15-5s and 19Vs were new. Found them as well as the 29s and 35s more stable running than the typical Fox 35. I used them strictly on profiles, the only planes I flew. Out of the hobby for the last 25 years, I went back to some of the old engines in the last couple of years. They still run consistently, although it's possible that corrosion has reduced compression some. The Enya25 and other dedicated modern controline Enyas have intrigued me, no doubt I will try one. In fact I'm glad to finally hear a reply from someone using the contemporary Enyas. Don't forget the guarantee that will replace the engine for a year or two no matter what the problem, including a crash. The problems encountered by the previous poster are not consistent with my experience. The castings and machining look superior to me. I never had any problems with misfits of piston liner and case. Perhaps the case, liner or head, were distorted by mishandling during assembly or via a crash.

I too find that guys experience with ENYA's totally rare. I have lots of them and not a bad runner in the bunch. I would be more inclined to believe that that engine had suffered from some sort of violent encounter with the earth. I don't know of any engines that will run right again after hitting the ground really hard unless you are just plain/plane lucky.

Bill

I purchased an Enya 15-3 some years ago and did a most unwise thing....I removed the head. When I replaced it I found that the piston seized in cylinder the tighter I made the head screws. A friend who worked in a toolroom mounted the cylinder on a tapered mandrel (snug) and discovered that the face adjacent to the cylinder O/D was running out a few thou, he carefuly removed this with a fine grit wheel and the problem went away, I am still using the engine and will probably hand it on to my grandchildren. I have many Enya's and consider them to be one of the finest made engines on market today, pity they have such poor marketing.

>A friend who worked in a toolroom mounted the cylinder on a tapered mandrel (snug) and discovered that the face adjacent to the cylinder O/D was running out a few thou, he carefuly removed this with a fine grit wheel and the problem went away.<

Can you please explain more clearly and exactly where the cylinder was out of spec? THANKS.

The little picture I enclose will hopefuly demonstrate more fully. This is not an Enya Cylinder but is the only one I have to display right now. The underside of little flange at top of cylinder is side adjacent to the outside diameter of cylinder, when cylinder is mounted on a mandrel the dia runs perfectly true, if you then run a dial indicater stylus on underside of the little flange it will detect any inaccuracy. On my little Enya the indicater said that the face was out by a few thousands of an inch, I cannot remember the exact amount but sufficent to distort the wall of the cylinder when the four screws were tightened down. What I cannot understand is the engine was perfectly free when I took it out of the box, it was only when I removed the head and tried to replace it that the problem manifested itself. I am much wiser now!. Hope this helps.

>What I cannot understand is the engine was perfectly free when I took it out of the box, it was only when I removed the head and tried to replace it that the problem manifested itself. I am much wiser now!. Hope this helps.
jonuck.<

Thanks, you explaination is clear now. This is a fluke incident .... I hope this does not deter you from looking into (taking apart) your engines in future. I take apart virtually EVERY engine I get my hands on , this is what has allowed me to understand engines and thus build the inline Cox Twin you might have seen on this forum. Are you sure you did not distort the upper cylinder sleeve flange when you took the engine apart, perhaps prying it off? This is how you learn .... the "hard way" is best way to learn, you will never forget! Believe me, you are not alone, I am sure each and EVERY expert engine builder has done the same once (or trice) upon a time, ask me how I know? <grin>

That being said, just pulling off the head should in no way damage the cylinder sleeve .... I would guess the head was never initally tightend down enough (at factory) to reveal the problem, just a guess? But you gotta wonder how the sleeve's lip ever got out of spec., almost impossible to machine it this way, perhaps previous owner's doings .... did you buy the engine spanking new from factory? Had the engine been run before you took the head off? If the sleeve was distorted all along, then it is a GOOD THING you found the problem!

In a further response to your post injunnut1 I think that your observation is probably correct, the head on my Enya had been tightened at factory just enough to operate but not enough to distort and the error in the face was there all the time......how it got there is likely common to all production lines and it slipped past their quality control procedure.
At the time and when my situation was resolved I thought no more about it but the posting of this thread has made me think a little more and I have come up with a possible explaination.
When these cylinders are turned they are made with grind allowance on O/D and I/D but linear lengths are probably made to finish size, then the ports are milled in before heat treat, this procedure is bound to cause some distortion to a greater or lesser degree, the cylinder sleeve is then centreless ground and this is were I think the problem is, if the little underside of the flange is not ground at the same time as the O/D it will retain the error that was the result of the heat treat. Maybe my little sleeve got missed. Just my theory!
Will include an image of the Enya machines in use circa 1968 courtsey of MAN edition dated March 1968 and I'll wager these were the very machines that my Enya cylinder was ground on.

Gothca, all clear now .... Thanks!

Hi

All this is becomming clear.
I see my critical comments of enyas has provoked some thought and some jumping to conclusions.

As to my 15-5, that engine was fine when I bought it new and during running in, I noticed bubbles forming in the slot between the head and cylinder. That is why I took the head off. The broblem occured only when I put the engine back together. There is no previous owner, I bought the engine new and have only ever run it on the test bench. So no crash, no hard knocks. The sleave slid out easily, no prying of force of any kind has ever been applied to it. The piston runs freely in the sleave up untill the head is nipped down.

The importer in Australia says to only very lightly nip the head down.
There is one other enya owner that I fly with and he has experienced the exact same thing with his enya. His words " this is the worst engine I have ever owned". Someone else posted the same problem on this list and now another person above. I have got to assume that this is a common problem in the enya manufacturing process. The post about the sleave face being out also explains the bubbles as it allows fuel to leak from the crankcase, between the sleave and cylinder to emerge just under the head where the methanol boils off forming bubbles. All this is a very consistant and familiar story.

Of all the engines I have owned over 30 years the enya is the only one I can't service with simple common tools. I think I'll pass the other machining comments on to the importer too.

I don't think I should be expected to be a turner and fitter to buy an enya so for me, Enya get a big flick pass.

Hi,
Thank you Ken for an excellent post it certainly seems that your experience mirrors my own exactly, since I too purchased my Enya brand new and I hadn't even run the thing when I ran into my problem, albeit it was my own fault for removing the head in the first place, there was no reason other than my own curiosity. It was fortunate for me that I had the means to have it checked and remedied very easily. Your experience has obviously left you a little jaundiced re Enya's and why shouldn't it, there are very many excellent model engines on the market and you will use that which gives you the most satisfaction. All of this being said I must say that I currently own many Enya's of all sizes and many more I have passed on to my son and his son, this Enya 15-3 is the only one that I have had a problem with, all of the others without exception have given yeoman service, the plain truth is you just cannot wear them out and are one of the easiest engines to refurbish, I could go on and on extolling their virtues but you are firmly set in your opinion. One other thing Ken if I were to send you my mailing address I would be more than happy to help you rid your life of that irritant Enya 15-5..............Only Kidding!!!

so no one has tryed the new enya25 cl version?

by any act, error, or omission, I have, intentionally or
unintentionally, displayed any breedist, disciplinist, sexist, racist,
culturalist, nationalist, regionalist, localist, ageist, lookist, ableist,
sizeist, speciesist, intellectualist, socioeconomicist, ethnocentrist,
phallocentrist, heteropatriarchalist, or other violation of the rules of
political correctness, known or unknown, I am not sorry and I encourage you
to get over it.

I don't have the plain bearing 25 but do have 2 of the 25BB motors set up for c/L use. With so many motors to try and get into service I haven't had much more opportunity then to bench run one of them. It starts easily and considering it's relatively new status dosn't seem like it will need the long protracted break in of it's older siblings.
I'm using an 11/4 cut down to a 9/4 for break in and it held a nice wet 2 cycle almost from the first run. Hopefully I'll get a chance to fly one by the end of the season.
Oh and I'm also a real fan of Enya motors having about 2 dozen of the critters in lots of displacements. Witout ever having a problem with any of them and some are 50 years old.
Dennis