Friday, 8 September 2017

Advanced snapflap mixing with OpenTx and Lua

Elevator-to-flap aka. 'snapflap' is a key mix for F3F, F3B and F5B models, and to get good performance in the turns, it's necessary to trim it correctly. However most radios don't provide much help here - their built-in snapflap mixers typically only allow dyanmic adjustment of travel.

In this post, I'll describe an enhanced snapflap mixer with the emphasis on 'trimmability'. It offers adjustment of all aspects of the snapflap curve, using permanently assigned transmitter controls. In addition, alerts are sounded when snapflap exceeds user-defined thresholds. The system was developed for my Needle 115, and has been continuously refined over two years of competition flying.

Saturday, 26 August 2017

A simple way to measure stick tension

My trusty Taranis X9D has finally suffered its first major issue in four years - a broken spring on the elevator gimbal. And yes, it failed in flight! Fortunately I was able to land the model safely.

Friday, 14 July 2017

Horus X10 preview - an upgrade for your X9D?

The Horus X10 is the second 'quality' radio to be released by FrSky. The new radio bridges the gap between the venerable Taranis X9D and the premium Horus X12S. Will it be good enough to persuade X9D users to upgrade? Will X12 users all suddenly want to downgrade? Let's indulge in a bit of informed speculation! [20 Nov 2017: section on charging updated].

Monday, 22 May 2017

Checking out your new FrSky transmitter

Over the years I've set up a variety of transmitters for myself and friends and as a result I've got to know what to look for and what to check out with new kit. So in this post, I list a few tips, including an effective method for checking the range.

Tuesday, 21 February 2017

Getting inside the Horus

The Horus is a sweet piece of kit - when it's fully operational. Unfortunately my own unit arrived with a gimbal that was double-centring. To FrSky's credit, it didn't take long to receive a replacement gimbal, and today I cracked open the transmitter to install it. It also offered an opportunity to inspect the Horus internals. Was it all good news? Read on...

Tuesday, 31 January 2017

Preparing your setups for OpenTx 2.2 RC10

The OpenTx developers have been making great progress with 2.2. The latest build is able to open .eepes created in OpenTx 2.1, and convert them to OpenTx 2.2 format. Even better, they can be re-targeted to the Horus - great news for those wishing to migrate their setups to the new transmitter.

Sunday, 22 January 2017

E-Soar Plus v2, with integral timer, faster setup

It's just over a year now since I published my E-Soar Plus template for full house electric sailplanes. Since then it's been adopted by a number of pilots for both sport and F5J competition. However there's always room for improvement; a few pilots have asked for a flight timer. Also I wanted to reduce the time to calibrate the servos and adjust the mixers. The result is E-Soar Plus version 2.0Let's take a quick tour...