HobbyKing L39 Albatros Review: Compact EDF Jet with Surprising Power

The HobbyKing L39 Albatros revives one of the most recognizable jet trainer silhouettes — the Aero L 39 Albatros. While the full-scale aircraft was designed in the Czech Republic for advanced jet training, this 64mm EDF version delivers a compact, hand-launch RC experience that feels both forgiving and surprisingly quick.

Built around an 8-blade 64mm fan unit powered by a 2220–3300KV brushless outrunner and a 50A ESC, it runs on 4S LiPo power instead of the smaller 3S setup used in earlier 50mm designs. The result is a compact jet that launches easily, tracks true, and offers EDF-like whistle with real thrust behind it.

Assembly & Build Quality

Assembly is minimal: wings and tailplane are glued into place, forming a rigid one-piece airframe. The EPO foam is dense and well-molded, and several thoughtful reinforcements make this model tougher than it looks. Reinforced control surfaces reduce flutter at higher speeds, and servo horn covers prevent snagging or scraping during grass landings.

Inside the fuselage, there’s a clean layout with space for standard-size 4S 1800–2200mAh packs and an XT60 connector. The canopy latch uses magnets — quick to open and secure in flight.

Flight Setup & CG

The recommended center of gravity (CG) is around 49mm from the leading edge. Most pilots found the model balances perfectly when the 4S pack is pushed fully forward. Elevator travel should be set modestly; the jet flies smooth, and small inputs go a long way. SAFE/AS3X stabilization (if added via Spektrum AR631/AR630) performs well — even in gusty 25–30mph winds, as seen in several test flights.

Launch technique is simple: a steady underhand toss at about 70% throttle will see the L-39 climb smoothly without dropping a wing. For pilots using stabilization receivers, SAFE mode provides reliable launch assist for clean climbs.

In-Flight Performance

In flight, the l-39 albatros feels locked in. It’s fast without being twitchy, tracks straight on low passes, and glides beautifully with the throttle cut. Inverted flight needs very little elevator correction, and it retains energy well in wide turns. Most flyers report around 3–3.5 minutes of mixed throttle flight on a 2200mAh 4S pack, which is ideal for this size EDF.

Landing is straightforward — reduce power, let it glide in, and flare just before touchdown. The reinforced belly and skid plates protect against rough grass, though you’ll still want to avoid high-angle arrivals.

Recommended Power Packs

For best results, pilots recommend staying within the 4S 1800–2200mAh range. These CNHL packs have been tested for fit, weight balance, and voltage stability:

• CNHL MiniStar 1800mAh 14.8V 4S 120C – ultra-lightweight, ideal for hand-launch performance and crisp rolls.
• CNHL Black Series 2000mAh 14.8V 4S 100C – balanced option, giving excellent CG and 3.5 minutes of mixed flight time.
• CNHL G+Plus 2200mAh 14.8V 4S 70C (2 Pack) – for longer, smoother sorties and endurance flights.

Explore more compatible options in our 4s lipo battery and 2200mah 4s lipo battery collections.

Flight Experience Highlights

In field tests, pilots consistently praised how “honest” the L-39 feels in flight. It reacts predictably to control inputs, even in turbulent conditions, and doesn’t tip-stall easily. As one flyer put it: “It’s a fun little rocket — light, fast, and simple.”

Although some wished for a rudder for crosswind correction, most agreed the simplicity of the 3-channel setup keeps it easy and light. The 64mm EDF produces a satisfying high-pitched turbine sound — especially at full throttle passes.

FAQ: HobbyKing L-39 Albatros

Q1: What size battery fits best?

Stick with 4S packs in the 1800–2200mAh range. 2200mAh fits snugly in the bay, while 1800mAh gives slightly better agility for windy or tight fields.

Q2: Can it handle grass takeoffs?

It’s designed for hand launches only, but grass landings are fine thanks to reinforced skids. Always check the belly for debris before re-arming.

Q3: How long does it fly on 4S 2200mAh?

Around 3.5 minutes of mixed flying or about 4 minutes of light throttle cruising. Set your timer accordingly.

Q4: Is this a good first EDF?

Yes. It’s stable, forgiving, and doesn’t require flaps or retracts. As a first EDF trainer, it’s a smart and affordable way to enter jet-style flying.

Q5: Where can I find compatible power options?

You can view all recommended batteries for this model on our HobbyKing L-39 Albatros collection page.

Final Thoughts

Compact, fast, and confidence-inspiring — the HobbyKing L-39 Albatros is one of those EDFs that feels “just right.” It’s easy to transport, quick to assemble, and pure fun in the air. Whether you’re testing wind limits or cruising low passes, it reminds you why small EDFs are making a comeback.