Ionly have one ASP, it is a .12 but it runs great. Ihave 2 other magnums, my XL46A needed the carb changed to run right and my XL52RFS needed sent back twice and finally replaced with a new one to run right.

Yep, stuff happens and the cheaper the price, the more often stuff happens.

Isn't that ASP .12 one fantastic engine? I love mine.


Ed Cregger

My buddy Joe has one all tuned up and fast a all get out. Mine just hauls around a Little Extra very nicely.

Webra just released the GT 25 fairly recently. Also, if you like smaller planes, the FP / LA series .40 & .46 work great on those 25 sized planes. I still enjoy flying these from time to time. I picked up an ASP 12 after reading how well you like them. I have yet to fly it, but I look forward to it.

I just received my ASP .21 from HK yesterday. It looks quite small next to my .25s, so it really is midway between .15s and 25s in size and weight, which is a useful thing to have. With the demise of the .19s, there are few engines in the 8 oz. size range anymore (that's with muffler included). Looks like a larger version of the .12.

I'm actually surprised that manufacturers have still been introducing some new small engines in the last few years, considering the popularity of electrics in this size. To use them you pretty much have to scratch build or convert an ARF...the other choices have dwindled to a very few. But it's easy to scratch build in this size.

I can do more of a report on this engine in a separate thread once I've run it up, if people are interested. We just got a cold snap here in upstate NY, so tests will have to wait a few days.

Jim

Dont give up on .25 size planes. Ihave some insider info about a major manufacturer that should be releasing a new kit soon in the .20 size range. I think you are gonna LOVE it.

And as far as current .20 ish size planes we still have the famous Sig Wonder and Kobra. bob Nelson flys his personal Kobra with an Enya .19. Mine is gonna get an Irvine (not OSvine) .25.

I really am amazed at your bad luck with Magnums, jeffie8696. I have an XLS .46A, an XLS .52A, and a pair of XL .52 RFS four strokes. All of them broke in quickly and easily, all four have been very reliable and user friendly. The .52 two stroke literally has hundreds of flights on it and is still performing like a brand new engine.

You must be the victim of some kind of curse to have the bad luck with Magnum engines that you've had! [X(]

Yes, there are about three or four kits left that are good in this size. I think the ASP .21 would be great in a Kobra or an HOB Mustang. But look at an old catalog or magazine sometime...or don't. I ran across an old Tower catalog in my junk and leafed through the kit section...what we've lost is even worse than I thought.

But RCM still has lots of plans for wonderful planes in this size. I'm thinking a New Era or a Miss Bikini would be nice. I could build one from what I have in my scrap box and hardly notice the loss.

Jim

What people should know is that designing and building ones own design is very, very easy. Find a model that you like how it flies, copy the ratios of everything and then you can always build a model that flies like the copied model. It is that simple.


Ed Cregger

I'm doing that right now, but when it comes to the structure, I keep creating problems for myself. But it's fun and absorbing to work them out. Naturally, mine has to be something a little different from all the others. That, I suppose, is where the trouble begins! But it will fly.

Jim

I just started posting the results of my efforts over on the Scratch Building forum.

Jim

I like the 25 size engines also and have no problem finding them. Look on ebay and or RCU at OS 25 FSR or SF - they can usually be found for about $30, some like new. I keep about 10 or 15 on hand for my twins (also the 28's), very strong, reliable and last forever -

I have had great luck finding the 25s for cheap.
My trouble with Magnums, yea Iknow. Idid have an XLS15 that was a goodie.
I have a bunch of 25ish engines in my "inventory" right now, Ihave been trying to pare it down a little.

NoviRossi make a .21 and .28. Jett makes a .25 in both side and rear exhaust versions.

Quote:

ORIGINAL: controlliner

http://www.foxmanufacturing.com/inde...cb68110324f718

This is THE most powerful .25 on the market. Disregard the price on the site it is wrong.

CL,


With all due respect to the Fox, I believe your above claim is wrong.

[link=http://www.webra-austria.at/motor.php?search=1021GT&folder=AERO&lang=EN]The Webra .25[/link] is surely no slouch.

The MVVS .25 ACES, with [link=http://www.mvvs.cz/obrMVVS/prislusenstvi/3243.jpg]its tuned silencer[/link] (nearly all engines are sold with it), surely blows the wings off the Fox. If used with the [link=http://mvvs.nl/MVVS/main_bestanden/3243Ainstructions.html]Reivers after-muffler[/link], it is even more powerful and silent to boot.


The Norvel, if still available, is also very powerful.


I think this Fox can beat most sport engines, like the OS.25FX and the GMS .25, though.


The only way to know is to actually pit it against these other engines, with different props.


Do you have such publications that you can link?

Looking to buy one of Ken Enya's SS25 alloy chrome liner engines when they finally come back in stock, the plain bearing type weighs about 195g and puts out around .75hp... Does that sound good?

Why not get the 30ss? Same case, same weight, more power. Someone posted figures on the tach forum showing the 30ss not too far behind the OS 25FX.

Not sure about the Fox 25BB beating out the OS 25FX...that would be very impressive. I agree that it would be good to have some figures.

There are considerable weight differences among these engines. I think the Fox is lighter than the OS, but it is very noisy on the stock muffler. My Enya 30ss is very light...barely 9 oz w/muffler, and very noisy. Seems the newer Enyas have bigger mufflers, so weight goes up but noise probably gets more acceptable. But a Macs one-piece muffler is best of both worlds on this engine...as light as the old small muffler, but less noise, and by my tach I think it gains a couple hundred rpm (but measured two different days, so not sure).

The 25FX is awfully close to a Webra .32 in weight (almost 11 oz); that, plus the rear needle mount that sometimes breaks, is why I haven't taken much interest in it. The GMS is over 12 oz (get the 32 instead); red case Irvine 25 is over 13 oz, and the new OS AX is as bad or worse. I have no use at all for a 12-14 oz 25. I do have a couple of Irvine 39s...same weight as the 25, much more power on larger props.

My MVVS .26 is about 10 oz. with stock muffler, like the Fox. I may have to look into the mini-pipe and after-muffler that Dar referenced.

Jim

Do have the SS30 and it is a great engine will turn an APC 10.5x4.5 @ 12800 on 10% and 12500 on FAI, the SS35R also uses the same case too.

But am interested in the 25 class engine for a combat project.

Mike.

RC Comat fliers mourn the loss of the 25FX and wish there was something to replace it. See this link to show you what a 25FX does against a Fox 25.

[link=http://rccombat.net/forum/viewtopic.php?f=7&t=13323&start=45]fox vs OS[/link]

Hmm. That test was done with synthetic oil and the Fox .25 is an iron piston engine. I suspect it would perform better with 100% castor oil. The iron piston engines will have better compression with castor oil and the compression further improves as they get some varnish on the piston.

Quote:

ORIGINAL: Luna_Rendezvous

But am interested in the .25 class engine for a combat project.

Mike,


This purpose is why MVVS offer their 4.0 cc ACES engine, available from [link=http://mvvs.nl/MVVS/main_bestanden/mvvs-engines.html#eng1]PĂ© Reivers[/link], with the muffler I discussed in my earlier post.

I am surprised at the lack of loyalty towards American made engines. Surely the Fox .25 will outlast the OS AB whatever engine. Price the piston and liner set for the Fox and compare it to the OS price. I am Canadian and I support American made products They are a better long term investment as far as support/ price. Support your fellow Countrymen !![sm=thumbup.gif]

Just finished this 90% size Quikray 500 for a Quikray 400. I'm using a Fox BB .25. I ported the engine and with the stock muffler on 5% with some castor added it turned a 9X6 APC 14,500 rpm, 9X5 MA 15,800 rpm. I plan on flying it soon.

Another engine that is strong in the .25-.30 size is the ST .29. I have two of them and they both turned a MA 9X5 15,600 rpm with no modifications on 5%.

Bill

Looks like Magnum are stepping up to show the title of this thread being wrong...
[link=http://www.youtube.com/watch?v=vwORvsf3oVs&feature=player_embedded]Toledo[/link]