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OS vs. Super Tigre engine

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Old 10-14-2012, 12:41 PM
  #26
tejician1
 
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Default RE: OS vs. Super Tigre engine

I've used ST engines since 1965 because I got tired of getting my butt beat in CL competitionLater when I switched to RC competition I continued to use Super Tigre engines, I've got quite a collection of them, both ringed and ABC..I've never had one wear out on me. I've competed in F-1 & Q'midget racing, RC Pattern and RC Scale and I chose a ST over the OS because the ST to me is easier to tune and can haul the mail quite capably. I also have a number of OS engines, some are used for RC and others are rigged for CL flight. I use smaller OS's (10's to 25 size ) in my sport RC planes, I like the way the smaller OS's start and run. I use OS 35-S & 40 FP's in my competition CL ships..because they are EZ starters and consistent runners...everything else (CL & RC) gets a fire breathing ST engine mounted in the front office.. In my humblest opinion, both brand of engines are excellent...but I still don't like getting my butt beat and I will still continue to use ST engines in my fast ships....

Reallistically, any brand of engine is good as long as it is propped right, the fuel is fresh & clean, has good lubrication (50-50 castor/synthetic), engine parts kept clean, tight and in good operating order...Most engine problems modelers suffer are from poor maintenance habits which can be traced to...dirty/gritty engine surfaces, poor prop selection, poor fuel tank rigging & installation, and loose/leaking parts.
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Old 10-14-2012, 03:05 PM
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Default RE: OS vs. Super Tigre engine


Quote:
ORIGINAL: tejician1

Reallistically, any brand of engine is good as long as it is propped right, the fuel is fresh & clean, has good lubrication (50-50 castor/synthetic), engine parts kept clean, tight and in good operating order...Most engine problems modelers suffer are from poor maintenance habits which can be traced to...dirty/gritty engine surfaces, poor prop selection, poor fuel tank rigging & installation, and loose/leaking parts.
A very true statement.

Skippy, you're selling yourself short if you refuse to try other engine brands. OS makes a good engine, no doubt about it but others can and do beat em and sometimes for less $$$.

At the local flying field a few years ago a new member was flying a 4star 40 and that thing was hauling the mail! It had a different crackle and bark to it so I new he didn't have an OS in it. When he landed and I came over to take a look I was surprised to see an ST 40 in it. That's when I decided to try STs and I haven't been sorry.
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Old 10-14-2012, 04:37 PM
  #28
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Default RE: OS vs. Super Tigre engine

I have two Super Tigers, a .40 and a45, a friend has five, .40, .45 and .51, .75 adn a .90. All are great runners and easy to tune. Just set it and forget it, very rarely do the carbs have to be touched.

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Old 10-14-2012, 04:54 PM
  #29
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Default RE: OS vs. Super Tigre engine

OS MIGHT COST MORE BUT 100% better then the st
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Old 10-14-2012, 05:31 PM
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Default RE: OS vs. Super Tigre engine

i have two super tiger engines both italian made. one is a .61 and runs as good as any os and powerful too. the second is a super tiger 3000 yeah the big one , it runs great too it pulls a 18x6 at 9000 and flies my extra 260 very well. i also have 2 os engines a 70 fs surpass and a 46 fx they run great too. also have a gms engine that is a .47. these were sold by tower for awhile. didn't run worth sh ........so i changed to an os remote needle and os 40c carb. now it runs like an os does ,and with the gms tuned muffler it screams. i also have had saitos. very good but i like os better. the china made super tigers ain't to good,sure not like the ones i have. they all run os # 8 glow plugs except the surpass with an os type f plug..............have fun...............RON
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Old 10-14-2012, 06:26 PM
  #31
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Default RE: OS vs. Super Tigre engine

use os if you can't tune a glow engine, they are much more user friendly, however the supertigres are also great engines if you are capable of tuning and have some patience with breaking them in first. i like showing at the flying field with different brands of engines because nearly everybody else flies gas or os glow engines and i get compliments on how good my engines run , even mds engines which have gotten a bad rap are good engines too as long as you break them in and use no more than 5% nitro, none is even better.
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Old 10-15-2012, 05:47 AM
  #32
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Default RE: OS vs. Super Tigre engine

G 60 Bluehead.
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Old 10-15-2012, 06:03 AM
  #33
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Default RE: OS vs. Super Tigre engine


Quote:
ORIGINAL: devil505

I currently have a Super Tigre 45 ABC in my great planes cherokee. The plane flies good but the motor has always given me little fits every now and then. I have found a used OS 46 FX motor, just wondering what your thoughts are about which motor is better, thanks


If you are not an "engine man" by birth, you'll fare better with the OS engine. If you have the knack for engine tuning and are really interested in engines anyway, you can have just as nice an engine in the Super Tigre. In fact, your Super Tigre, generally speaking, will outlast the OS by quite a long time. More performance? It really depends upon which model of each brand engine that you are comparing. Parts are much cheaper for Super Tigre, not that you'll need that many parts for an ST.


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Old 10-15-2012, 06:19 AM
  #34
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Default RE: OS vs. Super Tigre engine

I have both brand engines and other brands as well. Most of the people at my club fly OS as well. That is probably why you are having trouble with the ST engines (you would have had trouble with any other non-OS brand engine as well). Like others have said here, you and your club buddies are trying to tune the ST like an OS.

First of all, make sure that you give the ST a longer period for break-in. The ST ABC has chrome lining instead of the nickel lining on the OS FX. This might make the break-in period longer, but the engine will last longer than a nickel lined engine like the OS.

Make sure that the carb jet assembly cat-eye slit is pointing straight down the carb. You will have to remove the carb and look into it from the bottom. If the cat-eye slit is not pointing straight down, loosen the 2 small screws on the side of the carb and rotate the barrel assembly and then re-tighten the small screws (careful not to over-torque).

I run a Fox #8 plug, but an OS #8 plug will work too. Use 5% nitro fuel.

My Chinese GS-40 (ring) engine with a small racing prop (9x7 or so) turns 15,200 rpm's. My Chinese G-51 (ring) engine can turn a 13x4 prop at 10,000 rpms. Not bad, eh?

I don't use the ST stock muffler, they work well, but are too heavy for my liking.

Try it, you will feel like you didn't give up and just go with the flow.

I would keep both engines, and try both for comparison.
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Old 10-15-2012, 07:33 AM
  #35
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Default RE: OS vs. Super Tigre engine

Quickturn,
You are correct, I should have stated further that i do and have used other engines such as Irvine,evoluton and back in the day when i started flying pattern i used K&B and Rossi. All of these with the exception 0f the evo. were very good engines. I have two Irvines in a Beech Baron. Most of my intrests have now turned to gas engines.
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Old 10-15-2012, 07:38 AM
  #36
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Default RE: OS vs. Super Tigre engine

Both brands of motor are excellent. Most of my fleet is Super Tigre, but own a couple of OS motors as well, which have been great.

If anyone has the patience to build a model or learn to fly one, they can certainly figure out a ST carb. Not that hard.
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Old 10-15-2012, 08:02 AM
  #37
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Default RE: OS vs. Super Tigre engine

Skippyc5,

I haven't tried gas yet but I do have 2 Irvine 53's (UK version) and like them a lot. Built very much like an OS but IMO, better.
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Old 10-15-2012, 08:35 AM
  #38
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Default RE: OS vs. Super Tigre engine

Every engine brand has their own little tics and pops that must be learned. IMO it comes down to the Ford vs Chevy vs Mopar thing. If you are not happy with a particular brand, then try something else.

I have a new to me YS 53 4C. It is different from anything I've owned and is taking me a bit to learn it's tics and pops. It runs like a banshee but I'm having some idle issues. I'm almost there and have a handle on the adjustments.

Ken
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Old 10-15-2012, 11:16 AM
  #39
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Default RE: OS vs. Super Tigre engine

Super Tigres will last longer than an OS, no doubt abuot that. They are a bit harder to tune and seem to be a bit erratic as far as carb assembly at the plant. The spraybars cause untold amounts of trouble that isn't documented all that well. My worst engine was an OS .46SF.(of course my best glow engine was/is an OS 1.08)
I ran the old ST .46 for a long time, its only fault was that it would kick the crap out of you if you got it too wet while priming!
My dad had at least 1000 flights on a ST 90K and it never had issues except for the midair that sheared the entire jug off.
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Old 10-15-2012, 02:59 PM
  #40
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Default RE: OS vs. Super Tigre engine

My super tigre 45 has been an absolutely perfect engine. I would check fuel lines, tank, and then work back to the engine. New plug, and clean out the engine. It's not hard. You have a good engine, it may just need a second look. good luck
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Old 10-15-2012, 10:10 PM
  #41
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Default RE: OS vs. Super Tigre engine

Another thing to keep in mind is that Super Tigre's older engine lines had R/C carbs that were choice and second to none. In fact, they were superior to OS carbs in some years and models. An example would be the ST G21/.35 R/C engine that was sold in the seventies. It was a lapped piston/dual ball bearing engine with a two needle carb that was second to none in the world. They can still represent a valuable investment if harvested from the used market in good condition, plus there aren't many .40's around that will match their power.


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Old 10-16-2012, 05:07 AM
  #42
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Default RE: OS vs. Super Tigre engine

NM2K- you are correct about the older vs newer carbs. I hate sticking a screw driver in a carb needle slot. I much prefer the older, two 'finger twist' needles! I have a ST 60 on its second set of bearings (from Boca Bearing). The first set of bearings looked like Chicklets gum but it still ran. I would have never realized the bearings were starting to go if it wasn't for the fact that I use a 'chicken stick' to start my engines and noticed a little end play at the prop end!
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Old 10-16-2012, 08:53 AM
  #43
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Default RE: OS vs. Super Tigre engine

Tons of good info from a lot of folks that know there stuff, it's a mater of choice but if you aren't very good at tuning an engine then none of them are going to work well for you. Usually the OS is a much easier to tune engine but I fly with some guys that can't keep them running. A lot of the time it is just how the fuel tanks and engines are set up in the plane. Most problems are encountered with ARFs that you can't get the tanks set up correctly in.
I only run one size of two stroke and started using the .91 SK engines when I need a two stroke. So far after half a dozen of them I have only had one crank pin break and it was repaired under warranty. $100.00 with a muffler so I think I have gotten my moneys worth. I have never had a dead stick with one so either they are good engines or I'm doing something right??
Given a choice I would always go for the OS, I just find them more user friendly.
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Old 10-16-2012, 07:37 PM
  #44
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Default RE: OS vs. Super Tigre engine

Quote:
but if you aren't very good at tuning an engine then none of them are going to work well for you
And that is why we have electric power.
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Old 10-21-2012, 12:58 AM
  #45
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Default RE: OS vs. Super Tigre engine

I have a 55 ax and it works great. It just has a fast idle. Im going to change props. This morning I just bought a FS 72. Going to break in next week! Any tips on a good prop for this engine? I want a very good idle. Im not looking for power because i am flying a piper cub!
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