RE: *** CLUB SUPER TIGRE ***  
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RE: *** CLUB SUPER TIGRE *** - 7/8/2008 2:03:11 PM   
GSNut



Posts: 376
Joined: 3/22/2002
From: Thornton, CO,
Status: offline
quote:

ORIGINAL: pc55bomber

quote:

ORIGINAL: GSNut
Running Stock with ST Mufflers but OS #8 plugs and Omega Fuel 10/10 ST fuel. I may try some Byrons maybe. Other than that I fly here in Colorado at one mile high, sometimes higher if we put on a Airshow in some of the Mountian Towns around here.


Altitude, this may be the difference, as I said before I am not technical and all my flying is done at Sea Level, all I know here is that you can run them a little leaner the higher you get.
Perhaps someone with altitude experience can chime in here.

My twin runs Enya 53 four strokes, detuned with the head gasket fitted and a faster idle than normal, is working great.
Engine reliability is the key for a twin.

Hope this helps
Cheers
Paul




So am wondering if in the Italian version when they decided to use the same (identical) carb for the ST. .61, ST. .90, ST. 2000/ 1.2 and the ST. 2000/ 1.5 just as a cost cutting attempt. May have something to do with it.

One Size Fits All Theory !
Hummmm that may make some sense to them. I do have the extra ST carb and may consider having it bored out some. Then ream a taper to the intake even though there is not much material there.

Then again, would it not reduce fuel draw? or maybe that is what I need ?

I don't know but so far they are useless to me as they are.

Oh-Well

Cheers

GSNUT Doug in Denver



< Message edited by GSNut -- 7/8/2008 3:22:44 PM >


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Cheers!

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RE: *** CLUB SUPER TIGRE *** - 7/8/2008 4:41:37 PM   
Hobbsy



Posts: 10677
Joined: 12/2/2001
From: Colonial Beach, VA, USA
Status: offline 		Doug, Fox does exactly the same thing, the .46 ABC, .50 ringed, Eagle .60 and Eagle .74 all have the same sized carb. Think about it, the .46 and .50 turn in the 14,000 rpm range the .60 in the 12,000 rpm range and the .74 about 11,500. Another aspect is that the same sized carb on the larger superTigres has a thinner spraybar effectively making the carb larger. Here is a pic. of a .90 carb with the thin spraybar.

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< Message edited by Hobbsy -- 7/9/2008 12:54:03 PM >

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RE: *** CLUB SUPER TIGRE *** - 7/8/2008 7:50:40 PM   
GSNut



Posts: 376
Joined: 3/22/2002
From: Thornton, CO,
Status: offline 		Thanks Hobbsy !

I see that by the picture.... an all mine are the same as yours or that one.. measured to .010 thick on the flat sides
and at the middle of the cats eye. Heheh, yes I took em all apart yesterday and took measurements..
All my throats measured in the barrel are .354 which I suppose you could call the venturi.

Where the Perry for the .90 ST is a mear .340 #4500 a little smaller...
And the one for the 1.2 is a larger dia. of .375 #4501 a little larger....

Oh Well I don't want to order Perry's anyway but it is just a point of interest.

Cheers All

GSNUT Doug in Denver

< Message edited by GSNut -- 7/8/2008 7:54:31 PM >


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RE: *** CLUB SUPER TIGRE *** - 7/9/2008 2:57:08 AM   
ser00


 

Posts: 35
Joined: 4/30/2008
From: Houston, TX, USA
Status: offline 		Hi everybody,

I hope this is the best place to ask this question. I purchased a g51 ringed engine new in the box several months ago for a P51 mustang that I was building. Since the mustang is almost done, I placed the engine on the test bench to begin breaking it in. To my dismay, I noticed that fuel is coming out from underneath the cylinder head. I carefully removed the head to look for any defects in the copper gasket or machining of the head cover or sleeve top. From what I could see, I saw no defects. I carefully replaced the head cover and restarted the engine. The engine continues to leak. On the advice of a friend, I continued to break in the engine in the hope that everything will seat itself properly(heated metal expands, ect). It seems to me as I leaned out the high speed mixture and the engine got hotter, the leak lessened. After about 45 minutes of break-in time, the engine runs great - great idle, smooth transition to full throttle and no sputtering. I tached the engine between 11500 to 12000 rpm with a MAS 11x6 prop. The engine only seems to leak when it is first started and is cold. After about a minute of running, the leak seems to disappear. Is this normal for this engine? This is the only engine that I have that leaks (also, the only Super Tigre I have). The engine seems to run fine. I still have the receipt for the engine and the hobby shop told me to send it back for repairs. Does anybody think that I should send the engine back in to have it look at? The engine runs great and I would like to keep it since I have already ran 8 tanks of fuel through it. Finally, how many rpms will the engine safely swing a MAS 11x6 prop and a APC 11x6 prop? Thanks in advance. Also, if this post should be in another

Happy flying!

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RE: *** CLUB SUPER TIGRE *** - 7/9/2008 3:24:58 AM   
pc55bomber


 

Posts: 165
Joined: 8/23/2005
From: Newcastle, AUSTRALIA
Status: offline 		Don't muck around with it, send it back, sounds like a factory fault, a leaking head is not normal.

Cheers
Paul

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RE: *** CLUB SUPER TIGRE *** - 7/9/2008 3:30:18 AM   
greengoose


 

Posts: 33
Joined: 1/29/2006
From: roswell, NM, USA
Status: offline 		It seems there is a factory no no with your supertigre 51, I have one too and no fuel leaks from anywhere let alone the head, it doesen't matter if you have run 16 tanks through it there is definatly still something wrong with it. return it to hobby services it has a 3 year warranty, in most cases they will send you a new one...

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RE: *** CLUB SUPER TIGRE *** - 7/9/2008 4:27:25 AM   
Ed Cregger



Posts: 7734
Joined: 1/31/2002
From: Ringgold, GA, USA
Status: offline 		Carburetors spit a bit of fuel up and out of the opening. This is blown back and can hit the cylinder head at the joint, making it appear that the cylinder head is leaking. As you lean the high speed needle while breaking the engine-in, it appears to disappear. Could this be the case? It is unusual for an engine to leak enough fuel to be visible around the cylinder head and still have it perform satisfactorily.

To find out if it is a leaking cylinder head, get a piece of a woman's panty hose (single layer) and rubberband it to the top of the carb with the mesh covering the carb opening. Now start the engine and see if the leak is still there. It should have gone away if it is carb spit that you were seeing before. If it persists and the glow plug is tight as well as the cylinder head bolts, it might be time to send it back. But I doubt that you will have to send it back. Good luck.


Ed Cregger


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RE: *** CLUB SUPER TIGRE *** - 7/9/2008 4:51:23 AM   
ser00


 

Posts: 35
Joined: 4/30/2008
From: Houston, TX, USA
Status: offline 		Thanks everybody for your replies. Ed, what you said makes sense. It only occurs when the engine was running extremely rich and it seems to disappear as I leaned the mixture. I looked at the copper gasket and now noticed that it is slightly broken on the edge. The piece that broke off is still on the edge so it didn't go into the piston head and sleeve. I have ordered some new gaskets to replace it. I also noticed that I have a very tiny burned pit on top of the piston head about the size of a pin head. Should I be concerned about this? This is the first time I had to remove the head off an engine so this might be normal. The sleeve looks good and the sides of the piston look good. I really do not think that the pit on top is going to make any difference. Does anybody else have a different opinion? I am also thinking about buying a OS 55AX for the mustang. The mustang is a Hangar 9 P51 PTS ARF. I have heard that it is good to have a strong engine on it to get you out of trouble quickly. Of course, I am not trying to start a ST vs OS war here. I have no preference between OS and ST. I buy what I can at the time with what money I have at the time. I got my stimulis check and the 55AX is $149. I heard that OS has issues with bearings but I am a strong believer in after run oil (Mystery oil and Mystery air tool oil) and using alot of it (about 1 tablespoon in each engine after I am done flying each weekend). I have three kits to build that will need engines in them: a GP Dazzler, Rapture 40 and Easy Sport 40. I am also going to scratch build a Super Kaos 60. So, as you can see, I need to buy a few more engines for planes. Also, I noticed that the spray bar in the throttle is pointed directly down into the carb port. That might explain the good transition from idle to full throttle on the G51. Anyway, I am still learning about tuning engines and I eager to learn as much as possible.

May the sky reach for your plane and may the ground slowly approach it.
Happy flying!

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RE: *** CLUB SUPER TIGRE *** - 7/9/2008 5:02:26 AM   
Ed Cregger



Posts: 7734
Joined: 1/31/2002
From: Ringgold, GA, USA
Status: offline 		I would stick with Super Tigre if I needed as many engines as you do. Don't forget the GS-40. That is a powerful engine that will easily handle the Easy Sport 40 with power in reserve. Ditto the Dazzler. I forget the other model you mentioned. Gettin' old. <G>


Ed Cregger


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RE: *** CLUB SUPER TIGRE *** - 7/9/2008 7:27:13 AM   
ponda


 

Posts: 21
Joined: 10/26/2007
From: santa fe, TX, USA
Status: offline 		Ok....Used the method by blowing into the carb with a short piece of fuel line....Was much simpler than I thought...

Thanks a bunch...now the only question I have is...Am I supposed to have done something with the small screw with the spring on it???

Thanks again....

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RE: *** CLUB SUPER TIGRE *** - 7/9/2008 8:04:37 AM   
pc55bomber


 

Posts: 165
Joined: 8/23/2005
From: Newcastle, AUSTRALIA
Status: offline 		Hi Ponda
No, that screw is the mechanical adjustment (idle stop) for the throttle barrel only required if you use an analogue radio.
Computer radios you just use travel adjust or EPA to adjust the idle.
Screw it in as much as possible without it changing the throttle barrel adjustment. If its loose you can stretch the spring a little.

Screwing it in opens the barrel , out closes the barrel or visa versa, can;t remember which.
Cheers
Paul

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RE: *** CLUB SUPER TIGRE *** - 7/9/2008 9:29:13 AM   
the pope


 

Posts: 172
Joined: 4/17/2005
From: goolwasa, AUSTRALIA
Status: offline 		Could that spot on the piston be the pin that the ring locates itself on . Cheers the pope

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RE: *** CLUB SUPER TIGRE *** - 7/9/2008 12:08:59 PM   
Hobbsy



Posts: 10677
Joined: 12/2/2001
From: Colonial Beach, VA, USA
Status: offline 		Ser, that "burn pit" is most likely a very small punch mark showing where the piston ring is pinned so you'll know whitch way to install the piston.

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RE: *** CLUB SUPER TIGRE *** - 7/9/2008 12:57:07 PM   
Hobbsy



Posts: 10677
Joined: 12/2/2001
From: Colonial Beach, VA, USA
Status: offline 		Like this maybe?

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