a local RC guy is selling an RC Enya 29 nib at a good price. will a venturi and nv do or does it need to be re-timed as well ? Thanks in advance gentlemen.
enya 29
Stuka Stunt Main Forum · 15 of 15 known posts recovered · the forum listed 16 replies
Which model 29 is it? Is it the plain or ball bearing model?
Regardless of whether its ball raced or plain bearing,the ENYA 29 is
an engine from another era, meaning its NOT Schnuerle ported (which is good news for the stunt flyer),but it was also designed to be all things to all men. By that I mean it came with 2 heads and 3 different size venturi inserts,which meant it could be tailored to suit just about any requirement,from speed flying (with no insert,high compression head & pressure feed)to stunt flying with the smallest insert & low compression head. It probably made a better job of the former than it did of the latter, but keeping in mind it IS a loop scavenged engine,you will get very acceptable results by using the lower compression head,and either the smallest insert or even just leave the R/C throttle on and wire it fully open. My friend Pat King will be able to give you exact measurements of the 3 inserts available for these great engines. BOB. [photo not recovered: sipcof.gif]
an engine from another era, meaning its NOT Schnuerle ported (which is good news for the stunt flyer),but it was also designed to be all things to all men. By that I mean it came with 2 heads and 3 different size venturi inserts,which meant it could be tailored to suit just about any requirement,from speed flying (with no insert,high compression head & pressure feed)to stunt flying with the smallest insert & low compression head. It probably made a better job of the former than it did of the latter, but keeping in mind it IS a loop scavenged engine,you will get very acceptable results by using the lower compression head,and either the smallest insert or even just leave the R/C throttle on and wire it fully open. My friend Pat King will be able to give you exact measurements of the 3 inserts available for these great engines. BOB. [photo not recovered: sipcof.gif]
You would be better off to find an early Enya .35. The 29 was pretty hot for it's day and prefered running flat out. Enya even rated the hp output the same for both engines. I think you would really like the older 5224 series .35, they were almost bullet proof!
>a local RC guy is selling an RC Enya 29 nib at a good price.
>will a venturi and nv do or does it need to be re-timed as
>well ? Thanks in advance gentlemen.
>
All depends on what you want it to do.
The older Enyas were superbly made and finished. They last almost forever with the right fuel and careful operation. They are hard to break in, and even harder to wear out.
These engines like to run in a two cycle and probably are not worth the bother to retime. With that in mind, I usually ran mine on a 10-4 or a 10-5 (depending on the make).
If the price is right and you just want to have fun with the engine, the Enya most likely will not dissapoint you.
V/r
Bob
>will a venturi and nv do or does it need to be re-timed as
>well ? Thanks in advance gentlemen.
>
All depends on what you want it to do.
The older Enyas were superbly made and finished. They last almost forever with the right fuel and careful operation. They are hard to break in, and even harder to wear out.
These engines like to run in a two cycle and probably are not worth the bother to retime. With that in mind, I usually ran mine on a 10-4 or a 10-5 (depending on the make).
If the price is right and you just want to have fun with the engine, the Enya most likely will not dissapoint you.
V/r
Bob
Enya 29's are the engine of choice for Vintage B Team Racing here in the UK!
A couple tips for you. I have an Enya 29 that I had on a Flite Streak.
They're fairly heavy. I can't give you a weight off hand, but the cylinder liner must be better than an 1/8" thick. Some tail weight in the plane did wonders. Leonard made me a tongue muffler for it, but basically I used the muffler to pick up fuel tank pressure. Of course, the muffler aggravated the weight situation.
When I got my 29, some of the screws were pretty chewed up. Enya used a really hard-to-find size, same as some Super Tigres. It seemed like I searched the country, and then I discovered that #5 screws are perfect, if you run a #5 tap through the threads first. The #5's are evidently the same thread pitch, just a bit bigger in diameter...with deeper threads.
Doesn't play well with others,
Denny Malott
They're fairly heavy. I can't give you a weight off hand, but the cylinder liner must be better than an 1/8" thick. Some tail weight in the plane did wonders. Leonard made me a tongue muffler for it, but basically I used the muffler to pick up fuel tank pressure. Of course, the muffler aggravated the weight situation.
When I got my 29, some of the screws were pretty chewed up. Enya used a really hard-to-find size, same as some Super Tigres. It seemed like I searched the country, and then I discovered that #5 screws are perfect, if you run a #5 tap through the threads first. The #5's are evidently the same thread pitch, just a bit bigger in diameter...with deeper threads.
Doesn't play well with others,
Denny Malott
Not even knowing of such things as a 4-2-4 run back in the days, I always have run my ENYA Model 5224 engines in a 2 cycle mode. I do not know if they will do a 4-2-4 break. I can attest that the .29 will do well with the low compression head, the #1 (smallest) venturi insert, and 5 to 10 % Nitro fuel. Make sure the fuel has at least 20% Castor Oil as lube. The engine will take a couple of hours running before it is completely broken in. It will then last longer than dirt as long as you feed it enough Castor Oil. I have run one on 5% and a 10 x 6, I haven't tried a lower pitched prop on the .29s.
With 25%, the low head, and any of the venturi inserts they will they will pull a 9 X 8 with authority. Although it is probably not of interest to you, with 25%, high compression head, large venturi, and crankcase pressure it will scream with a 7 X 11 Rev-Up prop. I haven't checked the timing on the .29 and .35 Model 5224 to see if the difference in operation is real or just a function of the .29 size being the limit for "B" class events. I always had the .35 on a Ringmaster, so the .29 caught all other duties, Flite Streak, Voodoo, Midwest Hornet, Wooten Quicky Rat, etc. .
I won't get to it until next weekend when I am home again, but I will post the timing figures for the Model 5224 ENYA engines.
Pat King
Monee, IL
With 25%, the low head, and any of the venturi inserts they will they will pull a 9 X 8 with authority. Although it is probably not of interest to you, with 25%, high compression head, large venturi, and crankcase pressure it will scream with a 7 X 11 Rev-Up prop. I haven't checked the timing on the .29 and .35 Model 5224 to see if the difference in operation is real or just a function of the .29 size being the limit for "B" class events. I always had the .35 on a Ringmaster, so the .29 caught all other duties, Flite Streak, Voodoo, Midwest Hornet, Wooten Quicky Rat, etc. .
I won't get to it until next weekend when I am home again, but I will post the timing figures for the Model 5224 ENYA engines.
Pat King
Monee, IL
Bryan,
No one yet mentioned one possible complication:
If it is a 5223 or 5224, or possibly a few later series, the carb mounts into a sort of rectangular hole on the case. The extra choke inserts fit, small for high fuel draw at somewhat reduced power; medium for more general uses, and large for high RPM. You probably didn't get those with the RC version...
If the carb is still on it, you could lash it down full open and see how it goes.
If the engine has the later model's round intake base, you may have an advantage there. It would be easier to find a circular venturii insert.
ENYAs do last!
No one yet mentioned one possible complication:
If it is a 5223 or 5224, or possibly a few later series, the carb mounts into a sort of rectangular hole on the case. The extra choke inserts fit, small for high fuel draw at somewhat reduced power; medium for more general uses, and large for high RPM. You probably didn't get those with the RC version...
If the carb is still on it, you could lash it down full open and see how it goes.
If the engine has the later model's round intake base, you may have an advantage there. It would be easier to find a circular venturii insert.
ENYAs do last!
\BEST\LOU
Nothing says it must be made out of plastic. Seems to me that a chunk of leftover motor mount could be a good wood blank.
Hint: MARK hole placement for needle assembly and drill it outside of engine...not while it is in place. Same for venturi hole.
George
Edit: Poor photo but here's what it looks like:
[photo not recovered: 22100.jpg]
Hint: MARK hole placement for needle assembly and drill it outside of engine...not while it is in place. Same for venturi hole.
George
Edit: Poor photo but here's what it looks like:
[photo not recovered: 22100.jpg]
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regarding Enya break in. I know that I posted this before on one of the forums. However what has been said about breaking in this motor is all true but you might find this story amusing.
About 20 years a go a friend of mine bought an Enya 35 RC 5224, and Jack was not known for his patience or carefully running in motors. Having done that with ignition motors he said if you want them fast break them in fast. Soooooo. he mounted it on to an ugly stick and fired it up and took off. About 40 seconde into the flight it overheated seized and stopped. He landed left it cool and did it again, and again, and again. Mind you each time he did it it streached out the period between overheating and shutting down. Eventually he was flying out the whole tank and the darn thing had the slowest idle of any motor that we had around at the time. It would hand start usually in 3 or 4 flips. Jacks gone but I have the motor, and it still runs as well as it did 20 years ago. Try that with any other motor and you know what the results would be. I always thought more of an Enya then an OS and still do.
dennis
About 20 years a go a friend of mine
dennis
On my first 35 Model 5224 I ran 3 or 4 tanks through it on the ground, then started flying it at a slightly rich (in flight) setting. It took at least 10 flights before it would run out 4 oz. of fuel without stopping in flight. DO NOT try this with fuel with synthetic oil! You will wipe out the engine. With 20 to 25% Castor Oil in the mix the engine can run until it gets hot enough to create enough drag to stop it without doing any damage. I have never had one of my ENYAs be siezed when I got it to the ground after it stopped in flight. Castor oil makes a mess, it leaves deposits on the engine, but it keeps these old beasts from damaging themselves on a lean run.
Pat King
Monee, IL
Pat King
Monee, IL
One of the early fifties engines said to break them in that way. I think it was Orwick. The difference, if I remember correctly, was that the piston was sintered iron, not Mehanite.
To each his own, but I still prefer a series of two minute runs...followed by cool down to let it heat cycle - on a test stand.
There is no one way.
George
Edit: Took some new pics of the venturis. The venturi holes, as near as I could measure (drill bits), are 5/16", 9/32", and 17/64". My drill bits are graduated in 1/64" and they were a little loose. My GUESS is that the holes are metric and just a tad larger than the measurements I made.
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[photo not recovered: 22131.jpg]
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To each his own, but I still prefer a series of two minute runs...followed by cool down to let it heat cycle - on a test stand.
There is no one way.
George
Edit: Took some new pics of the venturis. The venturi holes, as near as I could measure (drill bits), are 5/16", 9/32", and 17/64". My drill bits are graduated in 1/64" and they were a little loose. My GUESS is that the holes are metric and just a tad larger than the measurements I made.
[photo not recovered: 22130.jpg]
[photo not recovered: 22131.jpg]
[photo not recovered: 22132.jpg]
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I bought an Enya 29 Mk IIIB in 1959. It has three venturi inserts and two heads. I run the low compression head and the small restrictor. It has a 0.0155 dia spray bar and 0.250 venturi. This is a 4 bolt head engine and about 6 oz. By 1980, I finally had it broken in.
I have it on a Veco Tomahawk I with a 9-4 or 10-3. It isn't a stunt motor with a 4-2-4 break, but a good bullet proof sport engine. Just fly it and have fun.
I have it on a Veco Tomahawk I with a 9-4 or 10-3. It isn't a stunt motor with a 4-2-4 break, but a good bullet proof sport engine. Just fly it and have fun.
John Wright
Hi Denny: The Enya bolts have something like 42.3 threads/inch, vs the 40 threads/in for the 5-40. I have substituted them in a couple of old Twin Stack OS 29s with decent results, and no retapping of the holes. Not the purist way to go, admittedly, but it worked.
Currell
Currell