SunnyFlyer09

These engines look IDENTICAL. Do the AP 's have the same power? Do all the parts interchange?

Mr Cox

Appearance deceives, the quality of the AP is much lower;
- poor crank to case fit (too sloppy)
- no airbleed on the carb (way too rich low end for good throttling)
- head gasket is very low quality
etc.

Andrew

MrC has hit the major points. The crank to case fit ranges from fair to awful. It's bushed, but I've seen some bored off center. Play in the horizontal axis may be fair, but you will find a lot in the vertical or vis-a-versa. Use a high castor content oil to help seal it. The head gasket looks as if it were punched out of a recycled Bud can. To get a good head seal, toss the gasket and replace with a third party copper gasket available from KittingItTogether or COX International (Xenalook).

The AP's I've opened are full of machining swarf. Disassemble and clean thoroughly. If you have access to socket head metric screws, I would replace all of the slotted screws some are soft and the slots will wallow - just be careful not to overtighten and snap one off.

DeviousDave

I once had an AP .061, but I was living in a 2 story Cheetos bag and it's all I could afford.


(Just kidding, I'd never own one!)

SunnyFlyer09

I'll stick with my Norvels, but this makes me worry about my AP .09 that I have not run yet.

Silvaire

My Feedback: (50)

AP Hornet engines range from junk to reasonably good running, but only for a short time.

Assume the worst - you won't be disappointed!

hllywdb

The AP is a cheap knock off of the pre-revlite Norvel. Most of the issues have been addressed here. The major issues are low machining quality (hence the wide varrience in quality and performance) and much lower quality metals, which is why even the "good" ones go to an early grave. Some parts are technically interchangeable, such as piston/cylinder sets as a whole, but now that Norvel parts are available again, why? The carburators are round, not oblong so the carbs and cases will not swap. I have tried swapping some of the parts, but have always ended up with lower performance and wore them out quickly.

It is similar to when Toyota copied the old 50's Chevy in-line 6 cylinder for the LandCruiser. With the inferior metals and machining, they all blew up early in life. The good news was that the bolt pattern let you drop in a small block Chevy when they did blow up, and by then all sorts of stuff like fiberglass tilt front ends were available! (Can I get an "Amen" here CP?)

Andrew

Fear not - if you like catfish, it can always be used for a bottom fishing weight, it's heavy enough.

Sorry, couldn't resist.

SunnyFlyer09

I was able to hit 17k on the .09 today on a apc 7x3

Not sure if thats a good number tho

Mr Cox

A Norvel .074 will easily match that at half the weight...

hllywdb

That is fine for an AP. It's not an Enya 09 or TD.

hllywdb

As Mr. Cox said, the Norvel will not only match it, but do so for 10 years or longer. But since you have the ap already, just find a suitable plane for it, like a cub, where the weight will not be such a penalty.

DeviousDave

My Dad has one of the .09's and he just loves it. Says it's really friendly and competent-but he concedes it doesn't have enough gunpowder to blow it's own nose.

I think I'd prefer a TT .07.

R/C Phile

Just get an Enya .09 and be done with it..


You don't have to spend megabucks on a fresh one from Japan either ( I think they are still worth the price though) . They are regularly all over Ebay NOS for less than a new TT, AP, you name the off-brand chinese crapshoot motor and will provide far better performance + Last forever..

On Second Thoughts: You could even Ebay that AP 09 and get an Enya for practically nothing (Assuming decent Ebay luck) / have a great little motor that idles / starts / handles as well as any .40..

mtntopgeo

My Feedback: (12)

[quote]ORIGINAL: R/C Phile

Just get an Enya .09 and be done with it..

How true, how true.!!! I've never understood why this engine (Enya .09) is so overlooked. Maybe it's because people tend to shy away from the 50 year(+) old technology (steel cylinder/baffled iron piston) & the hi-castor fuel it demands. I haven't come across any other small engine (and this includes the highly touted .07 Norvel) that is perfectly comfortable through the wide spread of applications that the Enya is capable of. Don't matter if you're running a 4.75x4.75 prop (20K, +) on a simple 400, or hauling a lil' Extra around with a 7x4 or 8x3. i've even had success hauling a bulky homebuilt foamie around with a APC "thin" 9x3. Only "drawback(s)" I've come up with is the long break-in they require, & that they are LOUD. ............. George K.