Top Part 103 Ultralight Aircraft You Can Build and Fly Without a License

Introduction

If you want an easy entry into aviation or just a genuinely exciting new hobby, Part 103 ultralights are the most accessible route in. These single-seat aircraft fall under US ultralight rules, which means no pilot license or medical certificate is required to fly them, no registration, and a strict empty weight limit of 254 pounds. The trade-off is simplicity: 5 gallons of fuel, modest cruise speeds, and short takeoff and landing distances. Here is a rundown of seven popular designs worth a close look.

A quick note before diving in: while no license is legally required, transition training or some level of flight instruction is strongly recommended before flying any of these. They fly like real airplanes, and gravity works the same way.

1. Aerolite 103

The Aerolite 103, built by Aerolite 103 LLC in DeLand, Florida, was designed in 1996 by longtime aviation enthusiast Terry Raber, and the prototype first flew in October of that year. It debuted at Oshkosh 1997 as a Grand Champion Ultralight, and hundreds were produced between 1997 and 2012 before Dennis Carley took over the design and production.

It is a true single-place Part 103 aircraft with an empty weight of 235 pounds and a gross weight of 600 pounds. Engine power ranges from 28 to 50 horsepower, with several engine options including a two-stroke and even an electric option with two batteries. Expect a leisurely cruise of 45 to 63 mph, stall around 26 to 28 mph, a climb rate between 500 and 650 feet per minute, and takeoff or landing distances of just 100 to 200 feet. The 5-gallon fuel capacity gives roughly 1.5 to 2 hours of flying time. Kits are available for self-build without an engine, and a complete ready-to-fly assembly is also offered.

2. Badland F1 UL

Badland Aircraft looks more like an experimental-class aircraft, but it is in fact a true Part 103 ultralight at 254 pounds. Founded by Chris Duell in 2016 in Las Vegas, Nevada, the company relocated to a small farm strip in Truman, Minnesota to continue building quality legal ultralight airplanes.

Badland offers five kit options to build yourself plus a ready-to-fly option for getting airborne sooner. The base kit starts well below the top-of-the-line builds, which feature a full titanium airframe, carbon fiber options, and more for around $45,000. Several engine options are available, with the most popular being a two-stroke, alongside other piston choices and a recent four-stroke concept engine. Interestingly, aside from fabric covering on the wings and control surfaces, the fuselage covering is optional, so you can build this plane with an entirely open fuselage.

3. HiMAX Ultra Cruiser

You would not expect an all-metal aircraft to qualify as a Part 103 ultralight, but with the right engine option and if you stick to the plans, the HiMAX Ultra Cruiser is Part 103 legal. It was designed by James Morris HiMAX, born in 1915 in Bryan, Ohio, who lovingly named the ultralight model “God’s Gift” after surviving a crash in another aircraft type. It has been available since 2000, originally plans-built and now offered as a kit as well. In January 2021, Matt and Lori Higgins acquired HiMAX Aviation and have been modernizing the manufacturing and production of parts and plans ever since.

The empty weight is 252 pounds with a gross weight of 575 pounds. It cruises at 63 mph, stalls around 28 mph, and the climb rate is quoted at 500 to 1,000 feet per minute, likely with a bigger engine. Plans are available for $370, and the base kit starts at $21,000.

4. Legal Eagle

The Part 103 legal Legal Eagle was designed and built by Leonard Milholland of Brookshire, Texas. When someone at an Oshkosh lecture asked which airfoil was used, Leonard replied “LP2, for lead pencil number two.” His goal was to design an airplane just about anyone could build and experience the joy of flight, and his marketing tagline reflected it: a cost to build of $4,000 to $6,000 depending on your scrounging ability.

It weighs 244 pounds, comfortably under the legal limit, holds 5 gallons of fuel, and can fly as fast as 60 mph or as slow as 25 mph stall speed. Power comes from a “Better Half” Volkswagen engine conversion, and Leonard offers plans for that engine as well. Plans for the Legal Eagle start at just $60, making it one of the cheapest true entries into building your own aircraft.

5. Kolb Firefly

Kolb Aircraft is known for quick and easy folding wings, an enclosed cockpit, a welded chrome-moly steel fuselage cage, and outstanding performance. Seeing a 40-horsepower engine push a 254-pound airframe is eye-opening. Kolb has been around a long time, and the brand is currently under new ownership and back in production.

The Firefly has an empty weight of 250 pounds and a gross weight of 500 pounds, with the usual 5-gallon fuel capacity. Top speed is 63 mph, it stalls at 27 mph, and the rate of climb is 750 feet per minute with the 40-horsepower engine. Base kit pricing is listed on the company’s website.

6. Kolb Mark III

For pilots looking for something on the heavy side, Kolb still makes the Mark III, the experimental two-seater option from the company. It utilizes an 80 to 100 horsepower Rotax four-stroke engine and keeps the signature Kolb folding wings, so you still get the practical storage benefits in a larger, two-seat package.

7. Aeromarine Merlin Lite

Rounding out the list as a bonus is the Aeromarine Merlin Lite, an all-metal ultralight with a high-wing, single-seat, enclosed cockpit layout and great looks. It is powered by a liquid-cooled two-stroke engine with electric start, offers a BRS safety chute option, and can even be mounted with floats for water operations.

It cruises at 63 mph, stalls at around 28 mph, and climbs out at 450 feet per minute. You can buy this model ready to fly for around $34,000.

Buying Advice

Choosing between these comes down to your build appetite and budget. Plans-built options like the Legal Eagle offer the lowest entry cost, while ready-to-fly options like the Aerolite 103 and Merlin Lite skip the build entirely. All-metal designs such as the HiMAX Ultra Cruiser and Merlin Lite appeal to builders who prefer rivets over fabric, and the Kolb designs stand out if folding wings for easy storage matter to you. Whatever you pick, budget time for training before your first flight.

Conclusion

Part 103 ultralights remain the simplest way to get airborne without a license: light, simple, and genuinely fun. Whether you want a scrounged-together plans build or a ready-to-fly metal machine, one of these seven designs should fit the bill.