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Bombardier Challenger 300/350

The Challenger 300/350 is essentially a scaled-down version of the Challenger 600 series, so there are similarities. The easiest recognition points are the cockpit windows, which become narrower towards the end. To differentiate between the subtypes you have to look at the winglets.

Characteristics cockpit windows of Challenger 300 and 350.

Bombardier BD-100-1A10 Challenger 300

The first version of the BD-100 has winglets attached almost perpendicular to the wings. This is the only external difference compared to the Challenger 350.

Challenger 300

Winglet of Challenger 300, standing nearly right up.

Bombardier BD-100-1A10 Challenger 350

The second iterative of the super mid-size Challenger has winglets attached to the wings at an angle of about 45 degrees. These winglets are a bit larger than on the Challenger 300. This is the only external difference compared to the Challenger 300.

Challenger 350

Taller, canted winglet of the Challenger 350.

Confusion possible with

Challenger 600 series

cl 600

The Challenger 300/350 looks most like its larger sibling, the Challenger 600 series. Look at the cockpit windows to keep them apart. They keep the same height at the 600 series, and become narrower towards the end at the 300/350. Also on all large cabin Challengers - except the 600 and 600S - the engines have a separate fan exhaust, while the Challenger 300/350 has a single exhaust.

Raytheon Hawker 4000

raytheon 4000

Being similar in size you might mix-up the Challenger 300/350 and the Raytheon Hawker 4000. These can be distinguished by the fairings for the thrust reversers: external on the Hawker 4000, not visible on the Challenger.

Cessna 700 Citation Longitude

ce700

The Citation Longitude is also similar in size as the Challenger 300/350. To keep them apart look at the differences in cockpit windows, apart from more subtle differences.

Embraer 550 Legacy 500

emb550

The final aircraft of similar in size is the Embraer Legacy 500. The main difference is in the top of the vertical stabiliser. At the Embraer it appears to be tilted forward.