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big tigre fuel - 9/10/2008 9:11:04 PM   
WhiteRook



Posts: 907
Joined: 11/3/2002
From: westbrook, ME, USA
Status: offline 		i thought power master sold it , but not any more , sig doesn't sell it any more either.
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RE: big tigre fuel - 9/10/2008 9:22:27 PM   
Red B.


 

Posts: 1030
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From: Jonkoping, SWEDEN
Status: offline 		See this post: BIG ST FUEL, dropped by sig

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RE: big tigre fuel - 9/10/2008 9:34:25 PM   
pe reivers



Posts: 2972
Joined: 1/23/2002
From: Arcen, , NETHERLANDS
Status: offline 		Take standard fuel, and add about 3/4 the amount in pure methanol to it. The big tigres need about 10% oil, not more.

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RE: big tigre fuel - 9/10/2008 10:32:25 PM   
WhiteRook



Posts: 907
Joined: 11/3/2002
From: westbrook, ME, USA
Status: offline 		your saying , a gallon of 10% nitro 20% castor with 3 Quarts of methane mixed in?

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RE: big tigre fuel - 9/11/2008 1:43:31 AM   
Flyboy Dave



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From: San Bernardino County, CA, USA
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quote:

ORIGINAL: Red B.

See this post: BIG ST FUEL, dropped by sig


Retailers drop products because they don't sell.
Products don't sell because they are not needed.
That fuel is not needed because regular 18% oil fuel works just fine.

There is no reason why a slightly larger displacement S.T. engine must have fuel with a lower oil content. That is an Internet myth.

The big Tigers have the same ball bearing crank and plain bushed rods as the other S.T. engines.

MY S.T. 3000's run fine on 15% nitro. They are not high compression engines, and they need not be run on low nitro fuels. They run fine on standard 15% nitro, 18% oil fuels.

I have not experienced any detonation or overheating on my big Tigers on 15% nitro.

FBD.



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< Message edited by Flyboy Dave -- 9/11/2008 1:44:47 AM >

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A mechanic says..."Oh yeah, watch this".
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RE: big tigre fuel - 9/11/2008 7:45:08 PM   
pe reivers



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From: Arcen, , NETHERLANDS
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quote:

ORIGINAL: WhiteRook

your saying , a gallon of 10% nitro 20% castor with 3 Quarts of methane mixed in?

If the fuel has (edit typo): 29 to 20) 20% castor, mix in equal amounts.
The big tigres need only 10% oil, and 8% will do as well.

< Message edited by pe reivers -- 9/11/2008 10:23:24 PM >

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RE: big tigre fuel - 9/11/2008 9:50:03 PM   
WhiteRook



Posts: 907
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From: westbrook, ME, USA
Status: offline 		dave, what type of plane is that?

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RE: big tigre fuel - 9/11/2008 10:54:02 PM   
Red B.


 

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From: Jonkoping, SWEDEN
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quote:

ORIGINAL: Flyboy Dave

There is no reason why a slightly larger displacement S.T. engine must have fuel with a lower oil content. That is an Internet myth.

The big Tigers have the same ball bearing crank and plain bushed rods as the other S.T. engines.

MY S.T. 3000's run fine on 15% nitro. They are not high compression engines, and they need not be run on low nitro fuels. They run fine on standard 15% nitro, 18% oil fuels.

I have not experienced any detonation or overheating on my big Tigers on 15% nitro.

FBD.


Each to his own, but why use expensive fuel when the big Tigres run fine on an inexpensive 0-5% nitro / 12% oil fuel using an OS F glow plug?
At least in Europe where nitro is very expensive a lot of money can be saved by following the recommendation by the manufacturer to use fuel with low oil and nitro content.

< Message edited by Red B. -- 9/11/2008 11:20:24 PM >

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RE: big tigre fuel - 9/11/2008 11:39:14 PM   
Flyboy Dave



Posts: 13511
Joined: 3/20/2002
From: San Bernardino County, CA, USA
Status: offline 		....which recommendation are you referring to ? Todays recommendation for the 2300 for instance is:

http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXFV80&P=SM#tech

REQUIRES: Propeller: 16x8, 18x8, 18x10
Glow Fuel: Minimum of 18% high quality oil by volume in fuel,
Nitro content should be between 5-15%.
SUPERTIGRE Recommends Fuel with 18% oil MINIMUM.


The plane is a Joe Bridi Big Dirty Birdy. It was an early 2 meter pattern plane. They are rare now, possibly obsolete. I have a new header and long pipe for it now.

FBD.

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_____________________________

An engineer says.... "That won''t work".
A mechanic says..."Oh yeah, watch this".
"Old Age, and Treachery will overcome youth and skill".
Revver Bro #4.

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       Post #: 9

RE: big tigre fuel - 9/12/2008 12:02:20 AM   
XJet


 

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From: Tokoroa, NEW ZEALAND
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quote:

ORIGINAL: Flyboy Dave

....which recommendation are you referring to ?

SuperTigre say that the low-oil recommendation applies to the 3000 and bigger (which means the 3250 and 4500 I guess).

However, if you're using a *decent* oil, you can run 12% in all of them.

We run 12% oil in our G90s here and it goes a very long way towards tidying up the crappy mid-range that these engines often exhibit.

Many, many hours and not a single failure on 12% Coopers oil.



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RE: big tigre fuel - 9/12/2008 12:24:51 AM   
WhiteRook



Posts: 907
Joined: 11/3/2002
From: westbrook, ME, USA
Status: offline 		the 4500 manual states using the low oil after break in, i don t know about the 2500.
you cant find this fuel any more, the low oil, i'm just going to add 3 pints methanol to a gallon of
5 or 10 percent nitro 20 castor to get the oil level down after break in , it may not even make a diff, but i'm inclined to go by the manual

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RE: big tigre fuel - 9/12/2008 12:22:04 PM   
Red B.


 

Posts: 1030
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From: Jonkoping, SWEDEN
Status: offline
quote:

ORIGINAL: Flyboy Dave

....which recommendation are you referring to ? Todays recommendation for the 2300 for instance is:

http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXFV80&P=SM#tech

REQUIRES: Propeller: 16x8, 18x8, 18x10
Glow Fuel: Minimum of 18% high quality oil by volume in fuel,
Nitro content should be between 5-15%.
SUPERTIGRE Recommends Fuel with 18% oil MINIMUM. ...


The low oil-content recommendation applies to the "big block" Tigres, i.e. the ST-2000, 2500, 3000, 3250, 4500 and 6000, but not the 2300. I do not know why this is so, but I guess it has something to do with power output in relation to conrod bearing size etcetera.

In all cases break-in should be made with "normal" oil content fuel. My experience is that the break in procedure takes quite a long time, i.e, at least a couple of hours running time, but once that is done the engines never seem to wear out. I have an old ST-3000 that has been run for more than 200 hours by now and I have yet to replace any parts, not even the ball bearings. I am using no-nitro fuel with 10-12% Graupner/Fuchs Aerosave synthetic oil (no castor) for this engine. The good thing is that the fuel is quite inexpensive and leaves practically no residue on the aircraft.

< Message edited by Red B. -- 9/12/2008 2:01:17 PM >

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