Hi folks,

My flying buddy, who does not hang out on RCU, has an Enya .80-4C NIB he bought in 1987. Does anybody here have any experience with this engine? What we are wondering is primarily performance-wise - we are thinking about what aircraft it may end up in.

I currently fly a Saito .72, and I would guess the Enya, due to it's vintage, would be a bit behind that in power, but I do not know for sure. The recommended prop sizes, operating rpm range etc are all similar. I'm thinking it's most probable first home will be something sport aerobatic in the 2C .40-.46 size range.

Any info/advice would be appreciated.

Thanks,

MJD

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Once broken-in and set up properly, your .72 will have a difficult time matching the Enya 80-4C (really a .74). Your .72 is much lighter and more compact and that is an advantage. But when it comes to producing power, the Enya is going to be tough to beat. Especially if your friend uses a 13x6 prop. It will pull a 14x6, but it really shines on the 13x6. Mine would pull my CGM Cub with the full size wing well enough to climb in knife-edge. The Enya 80-4C is a strong engine, but it is a little on the heavy side.

Ed Cregger

Thanks Ed, that helps a lot in deciding what we'll do with it. I was thinking a .46 size Cub or Decathlon might be a nice match, recognizing of course that the ideal Cg might need the battery somewhere in the trunk. The idea is a light sport aerobat, as he is a good flier but wants seomthing with medium aero capability and nice manners as he has not done much aerobatics to date. He seems fine on my Pizazz, so I don't see much of a problem.

The Saito .72 works best on the 13-6 too, at least on my Pizazz which although a great horsing around aerobatic airplane is IMHO between 1/2 and 1 pound too heavy for it's size. But it is loads of fun, and the .72 will pull it vertically indefinitely, albeit not too fast.

Cheers,

MJD

I got (as a gift ) an Enya .80-4C in a Pica 1/5 scale Aeronca Sedan, which weighed in at about 12.5 lbs.
It would fly it in a scale like manner...
It had a 14X6 on it when I got it, and that wound up being the best prop for that situation. I tried an APC 15X4W which improved take-off and climb performance, but I had to keep a higher power setting @ cruise...(as you could imagine )
Both of the above props would turn about the same r.p.m. of around 8,700 on 10% Powermaster.

Anybody know where I can get an Enya 80 head. I have a friend looking for one.

Cheers,

chip

Hello Chip; Google Steve Webb, in England

I'm getting kind of tired, saying this over and over.




Club Saito #12

HI,

I want to mount 80-4 C for my V77 1/7 A 80-4 C, will this engine run well upside down ??

Regards

Yes it runs as well upside down as any other four stroke

Thanks,

So it's great, I would be able to hide the 80-4C head in the stinson air intake.

Have your friend go to www.enya-engine.com and write Ken Enya an email requesting the particulars on that 80-4C cylinder head. Ken is usually fast to respond and his prices aren't bad either.


Ed Cregger

BTW, the conclusion to all this is is that I got him a Phoenix Decathlon (.46 size, really, really nicely built ARF too) for his birthday, and it is sitting under the cowl as I type at about 15 degrees from inverted, with the muffler routed out the air outlet. Layout worked perfectly. In the meantime a few break in runs proved that it is a strong, smooth runner.. come springtime we'll find out how it all works together.

MJD

The enya .80 is a punched out version of the .60 4C so it is fairly compact for a .80 The .90 4C on the other hand is big and very heavy, and would probably survive AA fire without missing a beat.

As a well worn aside (from me), the .80 isn't really an .80. It is a .74. I did the math one day and that's the number that came up. It makes me wonder why engine manufacturers do this sort of thing.

On the other hand, it is a fine engine and I really do like my 60-4C and 80-4C four-stroke engines.


Ed Cregger

Ed, That's not the only engine that isn't the size it is supposed to be. Do the math on a Saito 100 some time.

It happens all the time, I had a Webra T4 .91, it was really an .87. Jim, isn't the Saito 1.00 a 104.something?

It is a 105 I think

Brings up the thought about why the Saito 110?

But the 110 has a smaller crankcase foot print and bigger valves/carb

The FS-20 which is commonly referred to as the smallest four stroke produced actually displaces .217 ci. The HP VT-21 is a touch smaller at .211 ci.

Thanks for that info, Greg. I was of the opinion that the FS-20 was the smallest. I stand corrected.


Ed Cregger