Glow Engines Discuss RC glow engines

SuperTigre 2300 - How Powerful

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Old 12-06-2007, 01:10 AM
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Overpowered
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Default SuperTigre 2300 - How Powerful

In specs listed on the Supertigre 2300, it shows a 3.7 HP rating while the Supertigre 3250 is listed at 3.2 HP.

I have been using big cats (2500 - 3250) with good success and ability to swing big props.

Is the 2300 more powerful?

I can understand a better power to weight ratio (2300 is much lighter) but I'm deciding an engine for a kit Balsa Nova 120 I'm building now (was going to use the 3250) - What do you think?

Cheers
Eric

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Old 12-06-2007, 01:13 AM
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Default RE: SuperTigre 2300 - How Powerful

It will spin an apc 16x8 at 9000rpm, but its not the most reliable engine around. If the plane calls for a 120 the OS 120AX would be a much more reliable choice.
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Old 12-06-2007, 04:29 AM
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Default RE: SuperTigre 2300 - How Powerful


ORIGINAL: jeffk464

It will spin an apc 16x8 at 9000rpm, but its not the most reliable engine around. If the plane calls for a 120 the OS 120AX would be a much more reliable choice.
The 1.20 AX is a nice engine, but you could almost buy two Kangke SK 1.30A engines for the same price!

I'd say, if you're a Super Tigre fan who's experienced with breaking in and tuning the big cats, then stick with your original plan and buy a G-3250 like you originally intended. Horsepower ratings on glow engines are pure nonsense, and the old saying goes, "there's no replacement for displacement!"

If you're more in the mood to shop around and see what else is out there, Hobby People is carrying the Mark line of engines by Moki. You might also want to check out the Aviastar engine line carried by Sig at their website www.sigmfg.com - the Aviastar line includes 2-strokes in the 1.2, 1.5, 1.8, and 2.0 cu in size range.

Good luck, and good shopping!
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Old 12-06-2007, 06:28 AM
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Default RE: SuperTigre 2300 - How Powerful

The st2300 has the power advertised, but at 12000 rpm! It does however not mind to pull a large 18x8 prop. That kind of load is something the other available 1.20 glow engines will never tolerate.
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Old 12-06-2007, 06:28 AM
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Default RE: SuperTigre 2300 - How Powerful

The ST 2300 is completely reliable and throttles cleanly on 5% nitro fuel and 20% lube using a Fox Miracle plug.
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Old 12-06-2007, 11:45 AM
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Default RE: SuperTigre 2300 - How Powerful


ORIGINAL: Hobbsy

The ST 2300 is completely reliable and throttles cleanly on 5% nitro fuel and 20% lube using a Fox Miracle plug.


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


I agree with Hobbsy and Pe. The G2300 would be my choice for this model.


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Old 12-06-2007, 12:38 PM
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Default RE: SuperTigre 2300 - How Powerful

ORIGINAL: pe reivers
The st2300 has the power advertised, but at 12000 rpm!
Yes, but that peak power is probably measured without a muffler. In my experience using the standard
muffler/silencer I would say that peak power output is somwhere between 9000 - 10000 RPM.
The ST-2300 is a powerful and reliable engine once it has ben correctly set up and tolerates a wide
range of propellers. Using Menz propellers, the standard muffler and fuel with 5% nitro /15% all synthetic
oil I have obtained the following performance figures:

17x10: 7200
18x10: 6500

I'm quite impressed as it is approximately 1000 RPM more than what my Webra Speed 120 will produce
with the same propellers, using the standard Webra muffler and the same fuel as for the ST. Not many 1.20
two-stroke engiens are happy with props this big. Comparing it to my my old ST-3000 engines, I expect
about 1000 RPM more from the ST-3000 using fuel with no nitro and 10% all synthetic oil.

The ST-2300 is approx. 12 oz lighter than the ST-3000 (and ST-3250), which may be important
depending on what aircraft the engine will be mounted in. For a Balsa Nova I would choose the ST-2300.
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Old 12-06-2007, 06:16 PM
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Default RE: SuperTigre 2300 - How Powerful

The Balsa Nova in my Avatar is powered by a ST2300. I've flown it with both the Italian engines and the Chinese engines. Currently the Chinese motor is in it. Both are great motors and run exactly the same. Both motors are fully stock. I use a 17/10 APC. They turn it next to 8000 rpm. You will be space challenged trying to get a 3250 in it even with the glass cowl and it will be a little cobby looking. I built mine from a kit, not an ARF. It weighs 10lbs 10ozs. The engine will pull it vertically out of a hover with good authority. It's my favorite plane to fly. I also have the little one with a Webra 50.

Denis
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Old 12-06-2007, 07:40 PM
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Default RE: SuperTigre 2300 - How Powerful

I have one of the China assembled 2300's and have found it to be one of the most user friendly engines I have. It is presently in one of the old GP G202's at about 12 Lbs. The vertical is noticebly better than the Webra 1.20 it replaced which is also a very good engine.
Last spring I leaned it out with a Tach. on it and got 9700 RPM peaked (I don't fly it that lean). That was with the 5% Omega that I normally run it with, a 17-6 APC, and the glow plug that it came with. It starts good, runs good, and never quits, which makes it hard for me to understand the travails some have had with this engine.......... RJ
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Old 12-06-2007, 09:06 PM
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Default RE: SuperTigre 2300 - How Powerful

I have a 2300 in a Goldberg Sukhoi (about 10.5 lbs) with a 17X8 APC prop and Bisson Muffler. I loved it so much I purchased another one for a big Pitts that my dad is scratch building. Flown both engines and still would buy a third one if I needed it. I have to agree with RJ, I know that things can happen but I've had great success with ST engines. Just my two cents.
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Old 12-06-2007, 09:07 PM
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Default RE: SuperTigre 2300 - How Powerful

What effect will have to run the 2300 without a muffler other than increase in noise. I am using a pump so I don't need to pressurize the tank with the muffler. Thanks in advance.
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Old 12-06-2007, 09:14 PM
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Default RE: SuperTigre 2300 - How Powerful

the G2300 has one of the best power/weight ratios available. The 2300 runs a lot like the old 2500, only a pound lighter. It does have a larger carb requiring more rpm to draw fuel well. Prop the 2300 for 9000 rpm with an unrestricted stock carb, use a venturi sleeve or good .60 size carb for large props .
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Old 12-06-2007, 09:28 PM
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Default RE: SuperTigre 2300 - How Powerful

Running open exhaust on any R/C glow two-stroke could make the minimum reliable idle rise a bit. Backpressure does help a bit at retaining heat and permitting the engine to idle lower with reliability. Other than that, there really isn't anything to worry about.


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Old 12-07-2007, 07:52 AM
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Default RE: SuperTigre 2300 - How Powerful

Gotta agree on the 2300 as well. That engine is a powerhouse, period! Requires alot of break-in which will reward you with a wonderful running engine with single flip starts, a low idle, great sound, and lots of reliability as well. Have a Moki 1.35 which is close and required even more break-in than the ST did and also a Thunder Tiger 1.20 which was no box of chocolates until broken in. The ST out powers these engines.
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Old 12-07-2007, 08:35 AM
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Default RE: SuperTigre 2300 - How Powerful

You have to remember that the 2300 muffler is just an expansion chamber, no baffles.
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Old 12-07-2007, 10:04 AM
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Default RE: SuperTigre 2300 - How Powerful

Go to this thread, should answer anything you want to know and not want to know

http://www.rcuniverse.com/forum/m_38..._st2300/tm.htm

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Old 12-07-2007, 10:33 AM
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Default RE: SuperTigre 2300 - How Powerful

Instead of reading through loads of assumptions, why not read the solutions that ended all problems in the late '9-ties.
http://home.wanadoo.nl/pereivers/home.html
scroll down to regulated fuel supply and ST carb solutions with many pictures, explaining text and cad drawings.
The carb simply had a few main problems, that no one seems to address. Most of the solutions posted on RCU and other Fora solve symptoms, not the underlying basic problems. The symptoms were different in many engines due to unducumented changes by ST in those days. Consequently many "fixes" were published. In all engines however, the basic problem was very much the same, and could be solved by careful work, which turned a dog into a delightful engine. Reliable, and capable of anything you could ask of an engine.

I ran mine for towing duties on 18x8 menz props. A friend in the club used his for IMAC and 3D, and consumed about 40 gallons before a ring broke. Then after ring replacement another 20 gallons before he changed planes.
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Old 12-07-2007, 04:38 PM
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Default RE: SuperTigre 2300 - How Powerful

Yeh that'll work, just make your decision based on one persons "assumption" and you'll be set up great! The 2300 is a very good engine but as with any other ST which you say you already have, it has some issues, So if you can deal with the ones you already have, you'll be fine with this thing.
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Old 12-07-2007, 05:19 PM
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Default RE: SuperTigre 2300 - How Powerful

Keep the nitro at 5% and break-in the engine with the expectation that is going to take a while to become civil. This is why I don't recommend trying to fly it in unless you have a model that is fun to float around and play with at break-in power levels and love the, "When's the next deadstick?" game. Although I will say that both of my G2300's never deadsticked once - but I wasn't trying to peak them out early and fly them in normal fashion either. I just set them up near the 2/4 cycle break and let them blubber away.

An Ultra Stick 1.20 makes an excellent break-in model for this engine. It flies well with the G2300 running rich.


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Old 06-09-2019, 06:18 AM
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Default

Is the ring gap clocked to the front, or rear? Thanks
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