If you've spent any time at a model airfield over the last few decades, you've definitely heard the distinct scream of supertigre engines cutting through the air. There is just something about that Italian-designed roar that sets them apart from the crowd. For a lot of us who grew up with a transmitter in our hands and nitro fuel on our shirts, Supertigre wasn't just a brand—it was the powerhouse that actually made our heavy balsa planes feel like they had some real muscle.
Back in the day, if you wanted raw power and didn't want to pay the "luxury tax" of some other high-end brands, you grabbed a Supertigre. They were the blue-collar champions of the RC world. They weren't always the easiest to tune, and they certainly had their own "personality," but once you got one dialed in, it would scream until the sun went down.
A Legacy Born in Italy
The story of these engines really begins with Jorio Garofali. He was the mastermind behind the brand, and his influence is why so many enthusiasts still hunt down "Italian-made" versions on eBay today. For decades, the factory in Bologna produced some of the most competitive engines on the planet. Whether it was control line, speed, or RC aerobatics, Supertigre was usually somewhere on the podium.
What made them special was the metallurgy and the sheer variety. They weren't afraid to experiment. While other companies were sticking to a few standard sizes, Supertigre seemed to have an engine for every possible niche. From the tiny screamers to the massive 4500 series that could swing a prop big enough to serve as a ceiling fan, they covered the whole spectrum.
I remember my first "Blue Head" G.60. It was a work of art. The anodized cooling head didn't just look cool; it was a signal to everyone else at the field that you meant business. Those Italian-made engines had a level of fit and finish that felt incredibly solid. They were heavy, sure, but they were built to last a lifetime if you treated them right.
The Famous Learning Curve
Let's be honest for a second: supertigre engines had a bit of a reputation for being finicky. If you were a beginner who just wanted to flip a prop and fly, a Supertigre might have made you want to pull your hair out for the first hour. They were notorious for having a very long break-in period.
Unlike modern ABC engines (Aluminum, Brass, Chrome) that are basically ready to go after a couple of tanks, the older ringed Supertigres needed some serious "bench time." You'd spend a whole afternoon running them rich, letting them heat up and cool down, slowly seating that ring. But man, once that ring seated? You had compression that would snap your finger if you weren't careful.
Then there was the carburetor. The "Mag" carburetors were legendary, but not always for the right reasons. They worked on a slightly different principle than the OS or Enya carbs most people were used to. They were very sensitive to the midrange. I've seen guys at the field spend three weekends trying to get a G-51 to transition smoothly from idle to full throttle. But once they found that "sweet spot" with the spray bar alignment, that engine would never skip a beat again.
The Move to China
Later in the brand's life, production moved from Italy to China under the Great Planes umbrella. This is a point of huge debate in the hobby. Some purists will tell you the Chinese engines aren't "real" Supertigres, but I think that's a bit unfair.
While some of the "soul" of the Bologna factory might have been lost, the Chinese-made G-series engines were actually very reliable and much more affordable. The G-90, for example, became a staple for large-scale sport flyers. It was a powerhouse that didn't break the bank. It might not have had the hand-finished feel of the 1970s models, but it worked, and it kept a lot of people in the air when prices for other engines started skyrocketing.
The Big Blocks of the RC World
Before gasoline engines became the standard for giant-scale planes, we had the Supertigre "Big Blocks." I'm talking about the 2000, 2500, 3000, and the legendary 4500.
These were massive glow engines. Seeing a 4.5 cubic inch (75cc) glow engine run is an experience. It's loud, it's messy, and it drinks fuel like a frat boy at a kegger. But the torque? Unbelievable. These engines allowed us to fly 1/4 scale and 1/3 scale planes before the advent of reliable electronic ignitions and cheap chainsaws conversions.
If you're planning on running one of these today, you better have a heavy-duty starter and a very large jug of low-nitro fuel. They don't need much nitro—in fact, they usually run better on 5% or even 0% nitro with a good amount of castor oil.
Maintenance Tips for Modern Users
If you happen to find one of these supertigre engines at a swap meet or in the back of a dusty garage, don't pass it up. Even an engine that looks "frozen" can usually be brought back to life with a little heat and some fresh fuel.
Here's a few things I've learned over the years about keeping them happy:
- Don't skimp on the oil: These engines love castor oil. Even if you use synthetic, adding a bit of castor helps protect the bearings and the piston/sleeve fit, especially on the older ringed models.
- Check the spray bar: If you're having trouble with the midrange transition on a Mag carb, check the angle of the spray bar inside the carb bore. A tiny adjustment here can fix a "stumble" that you can't tune out with the needles.
- Glow plug choice: They can be picky about plugs. I've always found that a medium-hot plug works best for the sport engines (.40 to .90 size).
- The "Supertigre Lean": These engines tend to run a little bit "wet." Don't try to lean them out to the absolute ragged edge like you might with a high-performance racing engine. Leave them just a tiny bit rich for longevity.
Why They Still Matter
You might wonder why anyone bothers with supertigre engines in an era of quiet electric motors and efficient gas engines. For me, it's about the sensory experience. There is a specific smell to the exhaust of a Supertigre running on 10% nitro and 20% castor oil that just takes me back to being ten years old at the flying field with my dad.
It's also about the mechanical connection. When you get a Supertigre dialed in—when you hear that "pipey" jump in RPMs as it clears its throat and climbs—it's incredibly rewarding. You didn't just "plug in a battery." You tuned a machine. You understood its temperaments, you respected its break-in period, and it rewarded you with power and reliability.
Sadly, Supertigre isn't producing new engines anymore. The brand has faded into the history books of the hobby. But the engines are still out there. They're tucked away in hobby boxes, bolted to vintage "ugly sticks," and listed on auction sites.
If you've never owned one, I highly recommend picking up a classic G-51 or an S-29. They represent a different era of modeling—an era where you had to be a bit of a mechanic as well as a pilot. They have character, they have history, and despite what the "electric-only" crowd says, there is nothing quite like the sound of an Italian tiger roaring at 13,000 RPM.
So, next time you see a box with that classic tiger logo on it at a swap meet, grab it. Clean it up, oil it down, and give it a flip. It might take a minute to get it started, but once it kicks over, you'll understand exactly why we're still talking about them all these years later. There's just no substitute for a classic.