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Large scale EX 300 and ST3250 motor?

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Large scale EX 300 and ST3250 motor?

Old 07-14-2013, 12:15 PM
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oxen
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Default Large scale EX 300 and ST3250 motor?

I'm wondering if a Super Tigre 3250 nitro engine will deliver enough power
for a 96" span, 16-18 lbs. Extra 300? Or what about an 84" span and
slightly less weight? The 3250 is about 33ccs. Just interested in some easy
sport flying to begin with. Also, what torque ozs. would you recommend for
the elevator(duals), rudder and wing servos? I'm new to large scale and could
use some suggestions. Many thanks. Ollie B. Santa Rosa, CA.




Old 07-14-2013, 01:10 PM
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Default RE: Large scale EX 300 and ST3250 motor?

I think that engine would be happier in the 72-78 inch category. Servo torque of around 150 ounces would be good for a plane that size. If you really like your Tigre, then you might consider getting it converted to run on gas. Saves money in the long run, and the messy clean up is a thing of the past.
Old 07-14-2013, 02:50 PM
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All Day Dan
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Default RE: Large scale EX 300 and ST3250 motor?

Olie, It's time to switch to gasoline. Those large nitro engines are real guzzlers. I had one that consumed 3 ounces per minute. Switched to a Brison 3.2, 40cc, and it uses 1.5 ounces per minute and is much more reliable. Dan.
Old 07-18-2013, 10:44 PM
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Roary m
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Default RE: Large scale EX 300 and ST3250 motor?

I love my ST's, but the larger ones really are truck engines. Go with Moki or gasoline.
Old 07-19-2013, 07:03 AM
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Default RE: Large scale EX 300 and ST3250 motor?

Roary m: Wondering what you mean by "truck engine". Obviously, it doesn't sound good!
Old 07-20-2013, 03:45 AM
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Default RE: Large scale EX 300 and ST3250 motor?

you might need a heavier engine then the 3250 to balance a 96 inch plane
Old 07-20-2013, 04:36 PM
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Roary m
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Default RE: Large scale EX 300 and ST3250 motor?

The large ST's are good large cubic inch powerplants. They aren't real heavy breathers, nor are they high performance, just good all around prop swingers. For instance, I would take the OS 1.4 RX over the ST 2300. The ST can be piped, but the RX is a genuine high perf. engine with, IMHO, a wider power curve. Sorry to bug you with that remark. The ST is a very good prop swinger, but If you can afford it there are better choices out there. Just for the formality here, I have a 3000 and two 2300's, as well as the OS 1.4RX and OS 1.6 FX.

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