askJOHN Archive

Wondered about differences between iron-core, coreless, and brushless servos? It's down to the motors - we cut them open on a lathe to show you what’s inside!

30 years is a long time in the world of technology, and RC has been no exception in advancing at a rapid pace. This how-to brings you up to speed on what you've missed!

You’ve mulled it over, decided a Pantera P6 is right for you, and pulled the trigger to build yourself one. While you wait, questions include, what have I let myself in for?

Gathering up the tools to build your model helicopter begins with metric Allen and nut drivers. Here we review the contents of an experienced builder's tool box.

Selecting a set of blades for your 600-class model may seem confusing. Ranging from $20-120, in order of increasing price, materials include wood, fiberglass, and carbon fiber. Our advice if you're new is start off with a set of woodies.

Before someone took 3 single-axis gyros and combined them in one to create the first 3-axis gyro, helis used a mechanical gyro for pitch-and-roll, plus a single-axis gyro for tail rotor.

Whether your model relies on a hybrid-gyro (mechanical 2-axes gyro for the head plus single-axis for the tail) or 3-axis FBL-gyro, the model flies the same. Here's how-to fine tune the mechanical gyro like a pro!

Do thoughts of flying an airborne hot rod leave you cold? If that's the case then this brief photo-driven history and background regarding the Hughes 500 won't fly.