efish

My Feedback: (5)

Hi, I'm trying to decide on an engine for a plane I'm putting together. Top of my list is an old enya 25X because of the G carb and because my other enyas seem to like bigger props (its for a 3D plane).

Just wondering what the tach numbers/performance would look like compared to say, an OS 25FSR. I have a 35X that flies every bit as good as my OS 32SX but with the advantage of a 2 needle carb. Just hoping the 25X performs similarly cuz the earlier non-schnuerle enyas, while being very nice engines, could be a little anaemic (e.g. my old enya 19).

Any figures or feedback would be great.

Thanks.

efish

My Feedback: (5)

Alright, guess these small engines aren't that popular. Pulled a few engines I had together and thought I'd post the results in case anyone ever needs them. I'm not a big believer in tach numbers as the complete index of performance, but here's an indication:-

OS 25FSR(?) - 12800 (Not sure which model, but there's a VR stamped on the underside of 1 of the mounting lugs)

Enya SS30 - 13500

Enya 25X - 13800

OS25 FX - 14400

Prop: MA 9x6
Fuel: 5% Omega
Altitude: Sea Level
Air Temp: Not sure, but Hot! probably about 32 degrees celcius

All engines are well used. Didn't agonise over the tuning so potentially either, you could probbaly get a little higher numbers. Hope that helps someone someday....

buzzard bait

I really like engines in this size. My Enya 30ss always seemed very strong for a 9 oz engine (with muffler), but it's also a noisy little critter and the throttle is very non-linear. Your figures show the OS 25 FX to be much stronger, which is good to know (on the other hand, the FX is heavier...and quieter). Regarding the OS FSR, the stock muffler is kind of restrictive, and I found the engine gained about 300 rpm with a TT 36 muffler. Thanks for posting. Jim

Hobbsy

My Feedback: (102)

Fox .25 steel liner, meehanite piston
APC 9x6
Fox 5%/20% castor
Rpm===14,150

Cashpoboy

My Feedback: (7)

I sell lots of engines as a used dealer. I ran up the Enya 25x just to check it out. I was so impressed I kept it. It really screams. No numbers to show but it started super easy and just sang out to me that it wanted to rip on some plane some day. I would recommend this engine.

rainedave

My Feedback: (1)

Does anyone know where to get a muffler for the .25X? I believe the bolt spacing is 24mm, which is pretty narrow.

Thanks,
David

kenhiraihnl

the bisson strap-on, and a little work w/ dremel might work...ken

http://www3.towerhobbies.com/cgi-bin...?&I=LX8666&P=0

jeffie8696

I don't have a 25X muffler but I do have a 45X one. it's in the classifieds.

rainedave

My Feedback: (1)

A friend picked up a Hatori header at Singapore Hobbies for me. Thanks Pete!

I have not yet made any cuts to the header. It is still at the stock length of about 5" or so. Performance will obviously improve as the length is tuned.

Temp: 48°
Powermaster GMA 5/22
Enya #3 plug
APC 9x5
15,259
.74hp
4.54lbs. static thrust

David

rv7driver

My Feedback: (105)

David, those # are very impressive and you have not tuned the pipe!! What pipe are you using? thanks Pete

rainedave

My Feedback: (1)

It's one of those older style Mac's muffled pipes. It's about 12 1/2" long; the #1220 would be the current equivalent.

David

rainedave

My Feedback: (1)

I cut a 1/2" off the header (I'm working gradually) and got 15,488 with the APC 9x5 and 5% nitro today. That's 229 faster, .77hp and 4.68lbs static thrust. It was not "pipey" at all; I mean the throttle transition was pretty linear without a drastic jump.

I will cut another 1/2" off and try some 15% nitro fuel. I'd like to hit 16,000 by the time I get it tuned. 16,000 would be 5lbs static thrust and .85hp.

David