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OS drops .32SX - 5/14/2008 12:45:53 AM   
Lomcevak Duck



Posts: 843
Joined: 2/22/2004
From: Warner Robins, GA, USA
Status: offline 		Sad times, but true. The only real performance engine left in the OS lineup has been discontiued as they announce the new .35AX- an engine that is rated at a meek 13,000 RPM.

In my opinion, the .32SX was the best engine OS ever built, and they sold it for years. But alas, it is no more, and Tower is out of stock now. So if you've been planning to build a little speed plane you'd better get to your LHS and pick one up to put on the shelf for a while. I just got back from an hour's drive to my closest hobby shop and picked up one of the two he had left in stock.

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RE: OS drops .32SX - 5/14/2008 1:07:29 AM   
Crazy4Flight



Posts: 2181
Joined: 9/15/2002
From: Milford, MI, USA
Status: offline 		major bummer

well I installed 2 into a Nitro planess Cessna 337 (25)

and then I have one in a Kange F3D-30

All Run great!

I wonder how much performance is lost on the AX?

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RE: OS drops .32SX - 5/14/2008 1:29:43 AM   
Lomcevak Duck



Posts: 843
Joined: 2/22/2004
From: Warner Robins, GA, USA
Status: offline
quote:

ORIGINAL: Crazy4Flight

major bummer

I wonder how much performance is lost on the AX?



No way to tell until they hit the US market and folks get some numbers. Information right now is sparse and conflicting. MAN reported 13,000 RPM but I have seen some other numbers that cannot be verified. None near the 18,000+ the SX would turn unfortunately. I find it odd, though, that the .32SX is discontinued and sold out before the .35AX is even on sale in the US.

As a diehard OS fan I hate to say it, but their lineup looks less and less attractive every day with the new over priced four stroke alpha series and the low revving AX line replacing the proven and well liked FX/SX line. (I will admit to liking the .55AX, but wish they'd left the .46FX alone!)

I still like a lot of the OS engines, but I find with each new design I start hunting NIB engines they've dropped.

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RE: OS drops .32SX - 5/14/2008 2:07:22 AM   
freakingfast


 

Posts: 690
Joined: 1/3/2005
From: mather, CA, USA
Status: offline 		The OS32 sx was a great engine and I can't tell you how many gallons of abuse Iv'e poured through it.
I hear the Weba 36 is a hot number and there is allways a Jett 35.

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RE: OS drops .32SX - 5/14/2008 2:17:04 AM   
Lomcevak Duck



Posts: 843
Joined: 2/22/2004
From: Warner Robins, GA, USA
Status: offline 		I have seen a Jett .35 run, and it is an impressive engine, but you cannot get one for $100.00. That said, I am sure it is worth the price and I may own one in the future, but OS and Jett are in different leagues all together.

My last .32SX ran for almost ten years on a wide variety of planes and survived terrible crashes. I flew it on a Jerry Smith fun fly, a pylon racer, three spads, and a Diamond Dust that lived long enough to get recovered. On the day I lost that DDust with my .32 on it the engine was blowing as much fuel out from under the head as it was out the muffler and still turning 18,000 on the stock muffler.

I hope my new .32 lives half that long.

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RE: OS drops .32SX - 5/14/2008 3:08:19 AM   
combatpigg



Posts: 9206
Joined: 11/22/2003
From: arlington, WA, USA
Status: offline 		The .32 is versatile, you can 3D with it, I even flew AMA fast combat with one. It was the best all around engine they made. The CV .15 would be the one I thought was over priced, the .32 SX was a bargain.

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RE: OS drops .32SX - 5/14/2008 4:53:00 AM   
MetallicaJunkie



Posts: 771
Joined: 9/17/2006
From: donna, TX, USA
Status: offline 		how does a super tigre 34 w/ a carb compare?

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RE: OS drops .32SX - 5/14/2008 1:07:16 PM   
Lomcevak Duck



Posts: 843
Joined: 2/22/2004
From: Warner Robins, GA, USA
Status: offline 		Sorry MJ, I can't say as I've no experience with that engine.

I have heard good things about the Thunder Tiger .36, but again I've not run one myself.

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RE: OS drops .32SX - 5/14/2008 8:52:49 PM   
rmenke


 

Posts: 1667
Joined: 6/25/2004
From: Merced, Ca., CA, USA
Status: online
Its good to see the OS fans of many years coming around to the reality of the engine quality they are getting for their money, the most over priced engine in relation to quality that I have seen in years. No, have not had one in many years, since they went to the cheep cylinders, and the worst bearings in the industry. Now they add insult upon insult with the 4 bolt head system which has got to be more problems coming with the engine, and yet you just keep buying the junk, so they keep recucing cost and quality. I pay a lot less for my Thunder Tigers with better bearings and true ABC construction. They last much longer and outrun all of the equal OS powered things out there. If I want a hard running engine, I pull out a Jett 35, 50, 60 or 90. Yes, twice as expensive as a OS, but more than twice the quality, idle, transition and longevity. Don't know how much running it takes to wear out one of these things, several are over 7 years now and still going as new. Admit they are well cared for as they deserve, and looks like they will outlast me. Hope my grandson enjoys them as much and long as I have. Have not had another diesel Cad either. ENJOY ALL

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RE: OS drops .32SX - 5/14/2008 9:35:15 PM   
Lomcevak Duck



Posts: 843
Joined: 2/22/2004
From: Warner Robins, GA, USA
Status: offline 		Rmenke I started getting that feeling a few years ago with the introduction of the .46AX. Their engines will grow fewer and fewer in my hangar if they continue with the current trends.

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RE: OS drops .32SX - 5/14/2008 9:54:28 PM   
MetallicaJunkie



Posts: 771
Joined: 9/17/2006
From: donna, TX, USA
Status: offline 		i think the fx and sx line were the last of the great engines my .61 and .50 still run great and all have several gallons through them

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RE: OS drops .32SX - 5/14/2008 10:37:25 PM   
evan-RCU



Posts: 2508
Joined: 2/4/2002
From: Charlotte, NC, USA
Status: offline 		It's all electric anymore anyway.

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RE: OS drops .32SX - 5/15/2008 12:04:58 AM   
combatpigg



Posts: 9206
Joined: 11/22/2003
From: arlington, WA, USA
Status: offline 		what rpm do you get from a JETT .35 with a APC 8x8 on 15% nitro?

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RE: OS drops .32SX - 5/15/2008 12:12:32 AM   
Crazy4Flight



Posts: 2181
Joined: 9/15/2002
From: Milford, MI, USA
Status: offline 		BSE .35 R/C with muffler ABC 18,200 9x6

BSE .30 R/C with muffler ABC 17,600 9x6

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RE: OS drops .32SX - 5/15/2008 7:16:10 PM   
combatpigg



Posts: 9206
Joined: 11/22/2003
From: arlington, WA, USA
Status: offline 		Hmm, I don't see much superiority with the Jett .35, if any. The only Jett .35 I ever saw tried for AMA fast combat was mediocre, it had nothing on a Fox .36, definitely not in the same league as a Nelson .36.

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Led Zeppelin is NOT "old fogie" music.

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RE: OS drops .32SX - 5/16/2008 12:33:39 AM   
Ed_Moorman



Posts: 3631
Joined: 1/5/2002
From: Shalimar, FL, USA
Status: offline 		I must take exception with the remarks about the OS .46AX design. It seems obvious that the author has not compared the design with that of the FX. I am attaching 3 photos so you can see the differences in the cylinder and head design. It is not a rehash of the older FX engine, but a new and different design for OS. The first time I saw this same type cylinder-head configuration was on a Super Tigre engine many years ago. I think the .91 still uses this design and a 4-bolt head.

In the first photo where both the AX and FX have cylinder heads, the FX is on the left and the AX is on the right. Note the light area back of the fins on front. This is the front transfer port. Notice it is wider on the AX. You'll also see that the head bolts go into the eages of the transfer port area. If they had used a 6-bolt head on the AX with the wide transfer port, the bolts would extend into the transfer area.

The solution is the method I mentioned I first saw on Super Tigre engines. Note in the 3rd photo that the cylinder of the AX on the right extends upwards above the cylinder block. On the FX, the cylinder sits down into the bloch and it flush with the top. Now look at the two heads. The AX head has a deep groove machined into it to fit down over the raised cylinder, giving a tight seal. The FX head sits generally flush with the top.

Works good on Super Tigre and on OS and doesn't need 6 bolts.

As for the rpm range of the AX engines, specifically, the lower rpm and higher torque of the AX series, I think OS is manufacturing to sell to the greatest number of fliers. Most people do not fly speed planes, not very many, actually. The really popular kit now are scale, acrobatic scale and warbirds, and 3D planes.