Tobias Holm

Founder of Planenerd, based in Denmark. Got a LEGO plane as a kid. Obsessed with aviation since. None of my friends want to talk about airplanes.

The flat engines of the Boeing 737

Why Boeing 737 Engines Are Flat

The Boeing 737 is one of the most sold airliners in the world and features a unique engine design. Find out why the 737 engines are flat.

Tobias Holm
Commercial Aviation
A Boeing 737-700 during takeoff

The Boeing 737 Versions Explained

The Boeing 737 has improved through time, providing airlines with great benefits along the way. Learn more about each Boeing 737 version.

Tobias Holm
Commercial Aviation
Why did the Boeing 737 MAX crash?

Why Did the Boeing 737 MAX Crash in 2018 and 2019?

The Boeing 737 MAX was grounded globally in 2019 and 2018 following two fatal crashes. But why did the Boeing 737 MAX crash?

Tobias Holm
Commercial Aviation
Winglets on aircraft improve fuel efficiency

Winglets on Aircraft: Everything You Need To Know

Discover what winglets are, their benefits to aircraft, and why not all new planes have them.

Tobias Holm
Commercial Aviation
Learn about the green and red lights on a plane

What Are the Green and Red Lights on an Airplane?

Are you curious about what the airplane's green and red lights represent? Learn everything there is to know about airplane navigation lights.

Tobias Holm
Commercial Aviation

What Is the Decibel Level of a Jet Plane?

Jet engines are among the loudest machines in the world. Learn how noisy a jet engine is and why engineers try to make them quieter.

Tobias Holm
Commercial Aviation
The F-117 retired partly because of the F-22

Why Was the F-117 Retired?

With its innovative design and stealth technologies, the F-117 Nighthawk was a pioneer aircraft. So what led to the F-117's retirement?

Tobias Holm
Military Aviation
The top speed of the X-15 was 4,520 mph (7,274 km/h)

The North American X-15 Top Speed

The North American X-15 was the first operational spaceplane in the world. It still holds the record for the fastest crewed, powered flight in history.

Tobias Holm
Military Aviation