Single-seat ULM aircraft firefly

2-stroke engineinstructional

The FireFly is a significant breakthrough in ultralight aircraft. Easy-to-build and designed to be a legal ultralight under FAR Part 103. We have observed that most legal ultralight aircraft suffer from a lack of performance. We at Kolb Aircraft think flying an ultralight aircraft should be safe, fun, and affordable. Pilots should not have to give up performance when flying an ultralight so we have designed the FireFly to be a "real" aircraft with a level of performance that can fly rings around other ultralight aircraft. After all, who wants to drift around like a kite when you can be buzzing through the sky like a fighter? The FireFly also offers the mainstay features all Kolb aircraft are known for: quick-folding wings, enclosable cockpit, welded chrome-moly steel fuselage cage and, of course, outstanding performance. Kolb offers more safety, fun and performance in 254 pounds than any other manufacturer. HIGH PERFORMANCE The performance of the FireFly is absolutely awesome. You need to see a FireFly in the air to truly appreciate what it can do. Seeing how 40 horsepower pushes this 254 pound aircraft is eye-opening. The welded chrome-moly steel fuselage cage provides the solid feel of the "real" airplane. For strength and durability in airframe structures, aluminum and steel are superior. The heart of the FireFly, the fuselage cage, is made from strong, factory welded 4130 chrome-moly steel. We also use 4130 steel in all high stress areas. Compare a FireFly wing with the typical sailcloth wing of other ultralight's and you will see the difference. FireFly wings have rigid truss ribs and a massive 5" aircraft aluminum wing spar.