RE: *** CLUB SUPER TIGRE ***  
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RE: *** CLUB SUPER TIGRE *** - 12/30/2006 3:57:22 PM   
buzzingb


 

Posts: 1506
Joined: 9/4/2002
From: Bruce, MS, USA
Status: offline 		I have had fuel that wouldn't run well before that I had setting for one winter. I used it during the fall and filled and defueled several times during the pall. Later around spring after not flying much that winter I went out to fly and I couldn't get the fuel to run hardly at all and when I did get the engine fire off it was very weak and died after a while. I even got it into the air once but had to glide it back in. I didn't know what was wrong at the time so I checked everyting (too many things to list) as you might expect but nothing would make it run. Finally I thought about the fuel being in the jug all winter and changed the fuel and guess what, it ran perfect and never had anothe problem. Well I know some of you skeptics are thinking, Year RIGHT, he must have changed something that made it run. I wasn't satisfied with this so I saved the fuel and tried to make it run again after returing home and it still wouldn't run. All I can say if you don't believe this is, Some things you just have to experience for yourself. Mehanol can and will go bad if it is exposed to moisture.

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Buzz

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RE: *** CLUB SUPER TIGRE *** - 12/30/2006 4:05:45 PM   
happypappy


 

Posts: 476
Joined: 4/9/2005
From: Eustis, FL, USA
Status: offline 		That may be true about running correctly with 20% water in the jug. Problem is that alcohol will absorb water until around the 10% water to 90% alcohol area. Anything above that the water goes into phase seperation and will eventually go to the bottom of the tank. The guy may have been lucky and picked up the fuel off the upper layer. Believe, however, that may be one of those stories that may have been relayed to you! Yes, we all know about water injection, but that is not the same as water in the fuel.

(in reply to speedster 1919)
       Post #: 77

RE: *** CLUB SUPER TIGRE *** - 12/30/2006 5:00:31 PM   
rc34074


 

Posts: 821
Joined: 3/30/2002
From: lexington, OH, USA
Status: offline 		xjet-
I have no mid-range problems - my tigers don't load up as with proper back pressure the carbs are fairly easy to set to eliminate this. It is a balance between the needle settings. I now have 8-10 tigers and have no such problems on any of them. When brand new they need a little higher idle speed, but after breakin I set them to a nice low idle (about 2100 or so last time I tached one) and they run fine there. Another factor is fuel tank location and height - if the design of your planes does not enable the tank to be in the right location then you need to remake the plane to correct this. Another fix for this is the cline or iron bay regulators, but I have never spent the money to do this.

So I will repeat- it is not constructive to just complain about these carbs without offering a solution - so why not create a list of fixes you like? You could keep this in your word processor memory and just copy It into your messages very quickly, instead of writing messages over and over.

Ed

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RE: *** CLUB SUPER TIGRE *** - 12/30/2006 10:32:47 PM   
buzzingb


 

Posts: 1506
Joined: 9/4/2002
From: Bruce, MS, USA
Status: offline 		I smelt to this mans fuel and it even didn't smell right or look right. Do any of you know if bad methanol has a different odor or color?

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Buzz

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RE: *** CLUB SUPER TIGRE *** - 12/30/2006 10:33:51 PM   
buzzingb


 

Posts: 1506
Joined: 9/4/2002
From: Bruce, MS, USA
Status: offline 		One other point that may be important is that the fuel was in a metal container. I have heard that metal wasn't as good a plastic to store fuel.

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Buzz

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RE: *** CLUB SUPER TIGRE *** - 12/31/2006 12:35:06 AM   
buzzingb


 

Posts: 1506
Joined: 9/4/2002
From: Bruce, MS, USA
Status: offline 		If any engine will run bad methanol I am sure a Super Tiger could.

The man I was telling you about earlier just didn't believe me when I told him that his fuel was bad. I convinced him to try some of my fuel and he was then concinced that indeed he had bad fuel. The dog-gone-engine wouldn't even come up on its power band it was like it was under load and just didn't sound right. It also didn't want to start, when useing an electric starter I had to spin it over for a while to get it to fire and then it bogged as if it was way over proped. The fumes coming from the muffler didn't smell right either. After I pumped his fuel out I used my fuel pump and fuel and instantly it started up and reved normally. It is surprising to hear some people say that methanl won't go bad. Gasoline will even go bad and I won't start on that one because some of you will get tired of hearing about that, but boy can I tell you one more story about that.

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Buzz

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RE: *** CLUB SUPER TIGRE *** - 12/31/2006 2:26:28 AM   
chelliah 12


 

Posts: 4
Joined: 12/21/2006
From: perthwestern australia, AUSTRALIA
Status: offline 		A Super Tigre CARB set correctly WILL work with syh oil . There is no need to replace it with a different make period. USE THE SPRAY POSITION TO ADJUST THE MID-RANGE RPM. THERE ARE A NUMBER OF OF ARTICLES ON THIS SUBJECT WRITTEN BY EXPERTS OR SHALL I SAY USERS OF THIS PARTICUAR MAKE. YES I DO USE THEM AND RUN THEM IN THE MID-RANGE MOST OF THE TIME.

(in reply to speedster 1919)
       Post #: 82

RE: *** CLUB SUPER TIGRE *** - 12/31/2006 4:01:42 AM   
buzzingb


 

Posts: 1506
Joined: 9/4/2002
From: Bruce, MS, USA
Status: offline 		Thanks of the info for midrange cures as it reminded me of when I was experimenting with the old 2300. If you will observe from afar (Safety) the barrel of the carb as it opens on any carb you can actually see the fuel being drawn out and being sucked into the engine. The midrange is when this is most evident as the velocity isn't there yet to be that violent. Rotaing the spraybar to the rear removes the jet out of the main suction stream or airflow during this opening stage of the carb barrel. In other words the carb opens at the front first and that is where the airflow is not at the rear until more of the barrel is open. This may have some effect on fuel mixture. What is your opinion??

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Buzz

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RE: *** CLUB SUPER TIGRE *** - 12/31/2006 7:23:41 AM   
Ed Cregger



Posts: 7445
Joined: 1/31/2002
From: Ringgold, GA, USA
Status: offline
quote:

ORIGINAL: buzzingb

I have had fuel that wouldn't run well before that I had setting for one winter. I used it during the fall and filled and defueled several times during the pall. Later around spring after not flying much that winter I went out to fly and I couldn't get the fuel to run hardly at all and when I did get the engine fire off it was very weak and died after a while. I even got it into the air once but had to glide it back in. I didn't know what was wrong at the time so I checked everyting (too many things to list) as you might expect but nothing would make it run. Finally I thought about the fuel being in the jug all winter and changed the fuel and guess what, it ran perfect and never had anothe problem. Well I know some of you skeptics are thinking, Year RIGHT, he must have changed something that made it run. I wasn't satisfied with this so I saved the fuel and tried to make it run again after returing home and it still wouldn't run. All I can say if you don't believe this is, Some things you just have to experience for yourself. Mehanol can and will go bad if it is exposed to moisture.



------------------


I've had opened jugs of fuel that sat for several years before using it up without a problem.

I don't know what happened to your fuel, but it isn't typical for those that seal the container completely and keep the fuel in a stable environment without a lot of light.


Ed Cregger



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Artisan

"Flying models since the Fifties - I'll get the hang of this yet!!!"

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RE: *** CLUB SUPER TIGRE *** - 12/31/2006 2:00:09 PM   
buzzingb


 

Posts: 1506
Joined: 9/4/2002
From: Bruce, MS, USA
Status: offline 		Like I said, sometimes you just have to experience for yourself. One thing that is puzzling though is, why yould you leave fuel stored in open jugs for years when Mehtanol evaporates rather quickly and absorbs moisture out of the air rather quickly. It looks as if the methanol would be evaporated after a few weeks.

< Message edited by buzzingb -- 12/31/2006 3:16:05 PM >

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RE: *** CLUB SUPER TIGRE *** - 12/31/2006 4:30:05 PM   
Not24



Posts: 999
Joined: 12/7/2002
From: Gloucester, VA, USA
Status: offline 		My turn!!!

ST carb design is probably okay. The main problem with the 2300 is that it's got way too big of a venturi. Hence, the fuel draw problems. Tank placement should not be overly critical. Nor should fuel level, glow plug, or nitro content. A well designed engine should be able to run satisfactorily in most normal or common setups. Tweaking the nitro or glow plug should be left up to optimizing the setup and flying conditions.

My 2300 on the stock carb was unreliable, at best, and quit often. On the new carb, it's flying, tuning, and running like it should. Deadsticks only occur now when the fuel tank becomes filled with air.

My new G90 appears to be running as it should. I don't anticipate any problems with that one.

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RE: *** CLUB SUPER TIGRE *** - 12/31/2006 7:21:12 PM   
buzzingb


 

Posts: 1506
Joined: 9/4/2002
From: Bruce, MS, USA
Status: offline 		Not24 my 2300 is performing well now too thanks to you and your experimenting and knowledge. I love this engine as it is very powerful and idles so smooth. It really pulls the Funtana 90 well, it will go straight up as fast as it will fly in level flight, sure seem like that anyway. The 2300 has an abundance of power, swinging a 17X6 APC Sport right at 9000 last time I checked. As you say it really doesn't matter what glow plug, fuel, etc. as this thing will run it. Now I am useing Tower Plug and 15% nitro without any problems. It just amazes me as how low this engine will idle, I know it is lower than a Saito, and instantly throttle up like mad. I really am afraid it might pull the light made Funtana into. It hasn't yet but it is a lot of force to hold it by the tail when that powerhouse if throttled up. I really am well pleased with the vibration level, seem very low indeed. I have many gallons through the 2300 and everything is going great.

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Buzz

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RE: *** CLUB SUPER TIGRE *** - 12/31/2006 7:41:47 PM   
Not24



Posts: 999
Joined: 12/7/2002
From: Gloucester, VA, USA
Status: offline 		Great! Glad it's working for you. I think you can get even more power with another muffler. I can almost see 9000 with a 17-8 apc. My plane is a little heavier, and flies perfectly with the 2300. I won't be buying a fourstroke any time soon, so long as the tigres run like this one.

I second those thoughts on the smoothness and low idle. It does make that two stroke ring ding sound, but I ain't going broke over something like looks or sound. Performance makes up for that.

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Fly it till you break it!

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RE: *** CLUB SUPER TIGRE *** - 12/31/2006 8:30:34 PM   
Ed Cregger



Posts: 7445
Joined: 1/31/2002
From: Ringgold, GA, USA
Status: offline
quote:

ORIGINAL: buzzingb

Like I said, sometimes you just have to experience for yourself. One thing that is puzzling though is, why yould you leave fuel stored in open jugs for years when Mehtanol evaporates rather quickly and absorbs moisture out of the air rather quickly. It looks as if the methanol would be evaporated after a few weeks.



----------------


Don't get me wrong, I've seen jugs of "bad" fuel and it did have a funky smell as you indicated. It just hasn't happened to me yet and I hope it never does. Of course, my nieces may think that it already has happened to me - that old man smell. But as long as the neighbors don't complain...<G>

The smell kind of reminds me of what the gasoline in the float bowl of an old carb smells like. Really foul, like rotted vegetation. Yes, I'm aware that the chemistries of the model fuel and gasoline are completely different. The fact that they shared a smilar smell made me think that perhaps there was a similar mold, or other biological agent, involved. Something with a taste for both fuels, or perhaps some compound in the containers.


Ed Cregger



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Artisan

"Flying models since the Fifties - I'll get the hang of this yet!!!"

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