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Super Tigre 2000 - 3000 Engines

Old 09-14-2010, 10:06 AM
  #76  
joe monohan
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Default RE: Super Tigre 2000 - 3000 Engines

i will take 2
joe monohan
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Old 09-14-2010, 10:25 AM
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Default RE: Super Tigre 2000 - 3000 Engines

You will have to Email Frank or call him in the evening

Two are cheaper because he can send them in the same envelope
Old 09-14-2010, 10:29 AM
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joe monohan
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Default RE: Super Tigre 2000 - 3000 Engines

i just talk to my customer we want 3
let me know how you want me to pay
joe
Old 09-14-2010, 10:44 AM
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Default RE: Super Tigre 2000 - 3000 Engines

Joe,

You are going to need to Email Frank or call him on the phone.

He doesn't post on RCU very often. His user name is Frank Bowman on RCUniverse

He can send three rings in one envelope also.

Frank Bowman

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1211 N Allen Ave
Farmington NM 87401-3568.
Phone: (505) 327-0696

Old 09-14-2010, 10:49 AM
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Default RE: Super Tigre 2000 - 3000 Engines

Joe,

I would call you and Nancy on the phone but you do not have a listed telephone number

Jim
Old 09-28-2010, 03:59 PM
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Default RE: Super Tigre 2000 - 3000 Engines

I have a NIB ST 2500 but never put it in anything due to the carb issues I heard about years ago. Got it cheap, kept it all this time and found this thread. So now I'm thinking about which plane to put it in and wondered how big is too big? I like the Dynaflite Decathalon!
Old 09-28-2010, 04:34 PM
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joe monohan
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Default RE: Super Tigre 2000 - 3000 Engines

jim
joe monohan
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Old 09-28-2010, 04:39 PM
  #83  
joe monohan
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Default RE: Super Tigre 2000 - 3000 Engines

oh and the rings worked very well.
i made a ring compressor so it would be easyer for my customer
get the piston and ring back in the sleeve.
joe
Old 04-15-2012, 07:30 AM
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would you have a piston youd like to get rid of for a st3000
Old 04-27-2015, 09:31 AM
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DHG
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Originally Posted by Bax
The SuperTigre G2300 CAN NOT use the low-oil "ST" fuels. It must have an oil content of at least 18%.

The other big 'Tigres' can use fuel with an oil content of 10%-12% once they are fully-broken in.
Bax,

After running smaller glow engines for several decades I have recently acquired a G20, a 2500, and a 3000 and am enjoying how these big dudes run. I mixed up some fuel with 11% oil and 3% nitro based on posts I've seen here and elsewhere, and it seems to work fine on the bench with all 3 engines. Now I see your quote above and I'm wondering why would engines in the same size range, from the same manufacturer, want such radically different oil content? I certainly will switch to 18% oil for the G20 if necessary, but I'm having trouble understanding why that should be necessary. The G20 sounds the same as the others and makes white smoke when I twist the needle to the left, doesn't run hot, idles fine, etc. What determines how much oil is enough? Other than the death rattle after you've burned it up, that is.

Thx,
Duane
Old 04-28-2015, 06:48 AM
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The SuperTigre G20/2300 was designed with different tolerance and operating pressures in mind, which is why the engine requires a higher-oil fuel. It must have fuel with no less than 18% oil content by volume. The 2300 was designed with FAI Pattern in mind, which means that the fuel draw could be compromised in some of the maneuvers. The other engines were intended more for scale-type flying. When fuel draw cannot be guaranteed to be constant, higher-oil fuel is used to prevent damage from the times when the engine is running leaner due to the different fuel draw rates.


Sound and smoke won't tell you if a fuel is right for the engine, they can only tell you if the engine is getting a good fuel/air mixture. You can get a good fuel/air mixture regardless of the oil content because you have a wide range of adjustment to the needle.
Old 04-28-2015, 06:55 AM
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DHG
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Bax,

Excellent, thank you! That's the info I was looking for.

Cheers,
Duane
Old 04-29-2015, 02:03 PM
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Originally Posted by Bax
The 2300 was designed with FAI Pattern in mind, which means that the fuel draw could be compromised in some of the maneuvers. -- When fuel draw cannot be guaranteed to be constant, higher-oil fuel is used to prevent damage from the times when the engine is running leaner due to the different fuel draw rates.
This must be a true statement for any engine, how would the oil content for the G2300 change if you could guarantee fuel delivery by adding a fuel pump?
Old 04-29-2015, 04:38 PM
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Originally Posted by Bax
The SuperTigre G20/2300 was designed with different tolerance and operating pressures in mind, which is why the engine requires a higher-oil fuel. It must have fuel with no less than 18% oil content by volume. The 2300 was designed with FAI Pattern in mind, which means that the fuel draw could be compromised in some of the maneuvers. The other engines were intended more for scale-type flying. When fuel draw cannot be guaranteed to be constant, higher-oil fuel is used to prevent damage from the times when the engine is running leaner due to the different fuel draw rates.


Sound and smoke won't tell you if a fuel is right for the engine, they can only tell you if the engine is getting a good fuel/air mixture. You can get a good fuel/air mixture regardless of the oil content because you have a wide range of adjustment to the needle.
I suspect you meant to say clearances and not tolerances. Two completely different terms.
Old 04-30-2015, 06:04 AM
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Bax
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To answer Prigal, the G20/2300 will be destroyed if you a low-oil fuel, so I likely meant to say "clearances" and not "tolerances" above. The S-2000, S-2500, S-3000, G-3250, and G-4500 need to be run on fuel that's 12%-15% oil until they are well broken-in, and then fuel with an oil content of 10%-12% can be used. SuperTigre recommended that the oil be 100% castor oil in all cases. That's how they designed the engines.
Old 04-30-2015, 09:52 AM
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Originally Posted by Bax
To answer Prigal, the G20/2300 will be destroyed if you a low-oil fuel, so I likely meant to say "clearances" and not "tolerances" above. The S-2000, S-2500, S-3000, G-3250, and G-4500 need to be run on fuel that's 12%-15% oil until they are well broken-in, and then fuel with an oil content of 10%-12% can be used. SuperTigre recommended that the oil be 100% castor oil in all cases. That's how they designed the engines.
So it would be safe to assume that since the engine was designed for castor oil lubrication and most commercially available fuels have very little castor oil in the fuel (if any) that the user should be using a higher oil content fuel in these big Tigres than is prescribed if the user's fuel is mostly synthetic oil? I'd think so.
Old 04-30-2015, 06:01 PM
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Originally Posted by Bax
To answer Prigal, the G20/2300 will be destroyed if you a low-oil fuel, so I likely meant to say "clearances" and not "tolerances" above. The S-2000, S-2500, S-3000, G-3250, and G-4500 need to be run on fuel that's 12%-15% oil until they are well broken-in, and then fuel with an oil content of 10%-12% can be used. SuperTigre recommended that the oil be 100% castor oil in all cases. That's how they designed the engines.
Thanks Bax, it's good info, I have a G2300 that I converted to a Walbro carb, I used 12:1 gasoline/oil ratio for break in and 16:1 thereafter, I removed the backplate yesterday to have a look inside, it looks 'like new' but obviously petrol mixes need less oil.
The conrod is beefy in design and the crankpin is wider than most other engines with similar capacities, I think it will take a lot of abuse before giving up. I know it was not designed to be used with gasoline but 'fiddling' is part of the hobby and anyway it is no longer under warranty. Do you have a view on oil contents with gasoline?
Old 05-01-2015, 07:22 AM
  #93  
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We have no suggestion for a fuel/oil mix when you're running gasoline. The engines weren't designed with gasoline in mind, and we've never run them that way.

As far as using modern fuels with little or no castor oil, just make sure you're running the engine on the rich side. The castor is best when you have low oil content or are running hotter than usual. We'd most certainly add some castor to fuels that have none. If you have problems getting castor oil, you can most certainly use medicinal castor oil from the drugstore, or purchase Klotz BeNol through hobby outlets or racing shops:

http://www3.towerhobbies.com/cgi-bin...&I=LXS627&P=ML
Old 05-02-2015, 03:19 PM
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Thanks Bax, great info as always.
I have a soft spot for SuperTigre engines and think the quality is better than the modest price suggests, but they are getting harder to find these days.
I have converted a G2300 and a G90 to gasoline and both work well, testament to their quality and flexibility.
Old 07-13-2016, 04:34 PM
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I picked up a 3000 ST and am not sure what mix of fuel to use. I have tried a 15 / 18 and it runs good on the ground. Get in the air and after running full throttle for a short time it dies. Then a recovery mode is nessary. Is it the prop size? Is it the fuel? Is it the file tubing? Is there a connector and clunk bigger to make it run good. Don't know which way to go. If special fuel is needed where do I get it. Now that is a lot of questions isn't it.
Old 07-14-2016, 03:36 AM
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MC, here is a test of said engine by Peter Chinn. No rpm numbers listed, he does mention the prop sizes.

http://sceptreflight.com/Model%20Eng...T%20S3000.html
Old 07-14-2016, 05:24 AM
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If using 15% nitro, that likely is the issue. Those big cats don't like much nitro. I venture to guess dropping to 0-5% nitro will cure the trouble.
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Old 01-01-2018, 11:26 PM
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Please let me know where I can find the Magnum carbs. I have an ST G90, G2000, and .61.

Thanks

Corky
Old 01-01-2018, 11:27 PM
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Originally Posted by prigai
Thanks Bax, great info as always.
I have a soft spot for SuperTigre engines and think the quality is better than the modest price suggests, but they are getting harder to find these days.
I have converted a G2300 and a G90 to gasoline and both work well, testament to their quality and flexibility.
Please let me know the conversion process to gas.

Many Thanks!!

Corky
Old 06-26-2020, 05:23 PM
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[QUOTE=Ed_Moorman;504762]The carb for the ASP .91 should be the same one as for the 1.08. For either of these carbs and for the OS, you need the split sleeve the early STs came with to reduce the hole in the crankcase to the size of the carb neck. Great Planes used to carry them. In a pinch you could use aluminum tape.




anyone happen to have a picture of one of these split sleeves? I just bought one of these s3000s and the carb measures 15mm but the hole in the case is 17mm. Needless to say the just flops out of the hole. I can’t find any info on this missing part anywhere. Can’t find a parts diagram or a part number. Please help.

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