Large control surfaces are more flexible than you might believe and this means they can set up a positive feedback oscillation. There's an easy fix and we show you what to do about it!

Ever wondered how such a tiny motor can produce such huge amounts of torque? Like the transmission in a Ferrari launching it to to 200mph, with the servo it's down to the gear train.

Tail Rotor Servos There are a class of servos, which we call tail rotor servos. Their pulse range is half as wide (the why is beyond the scope of this article so please just accept that they're...

Kindly review this material before proceeding. The case against synthetic voltage Bypassing the BEC As the manufacturer of ProModeler servos we advise using a 2S LiIon or LiFePO4 dedicated pack or a...

Most charger-purchases are tactical decisions; what do I need right now? But a more strategic view may result in your deciding several inexpensive individual chargers deliver better redundancy and flexibility for charging/discharging several packs at a time. This may better suit you!

Most only think of the Y-harness for connecting two servos to one channel. Thing is, this handy little accessory is useful the other way around, also.

In the vein of a penny saved is a penny earned, this brief how-to shows you an easy way for making your mask serviceable for its intended duty after repeated use. Maybe it's a stretch to say it results in a free mask, but it's effectively true!

Watching some rat bastard politician on TV was the first we noticed someone wearing two filters. One with their party's logo worn over a serious N95 led us to think; 'If it's good enough for them...'

Selecting servos can be confusing and most guys get snookered by expensive advertising campaigns and sponsored pilots who say what they're told to. How can you figure it out for yourself? We show you how!

A low-buck approach for how to use a HV servo with a 6V-radio system. Best part? It applies to an X-MAXX, TRX4 or pretty much 'any' vehicle (of any brand) relying on a 6V BEC-circuit to operate the steering servo!

Buying into the marketing-driven idea of special pricing, as if costs change based on certain magical days, is a good start! Instead of cat and mouse games, we make you our best offer from the very beginning.

Interested in trying your hand at 3D? Confused by conflicting advice regarding servos? We help guide you through specs like torque, speed, current, and voltage - and why they matter. Plus what's better for you; a BEC or battery - and why!

Ever wondered about the difference between DC, coreless, and brushless servo-motors? This askJOHN article addresses it in a largely brand neutral way. and is generically useful because all servos - regardless of brand - use one of these three types of motors (share the link freely).

The best performance comes by feeding the servo the highest voltage for which they're rated, 8.4V but getting there can be tricky. We look at several ways of skinning this cat.

Is your avionics battery pack safe for three-flights? How about five? How can you figure out if it's safe to fly a sixth time before recharging the battery pack powering the radio system? The answer determines if you drive home happy at the end of the day, or not!

Q. I'm curious what receivers and other electrical components you use, and maybe how you linked them together. In other words, what you find works well with your servos.A. Radio system selection...

Q. Why do some brands of digital servos hum and squeal while others don't? And are the ones making so much noise also pulling more current?A. By the time they get to us, most modelers have...

What's the connection between servo selection, and a brief how-to regarding the classic silk-and-dope model airplane finish? As occasionally happens, we detour through the unexpected coincidences of life before reaching an answer.

Which throttle servo would you recommend for a gasser? Many criticize using mini-servos in this application, can your mini servos take it? And because it's quite fast, what are your thoughts on using a tail rotor servo?

Since the BEC included with the ESC is usually limited to 5A of current and modern high performance servos can exceed this, bypassing the BEC and using a 2S LiPo is an easy solution - and inexpensive too.

A standalone servo programmer is something of a kludge because each servo must be removed from the airframe to access the lead, to disconnect it from the wiring harness and plug into the programmer. Rinse repeat for any adjustment - what a pain!.

Marketing types push your buttons by using words like 'safety' to get you to ignore common sense and outfit your model with two battery packs. We explain why this is just BS designed to get rubes off their wallets.

With so many different kinds of batteries available, which chemistry is right for you?

I occasionally field questions regarding servo connectors and extensions (especially for giant scale models). Let's briefly delve into some mechanical and electrical considerations because basically, we (all brands) play by similar rules.