Sunday, 27 October 2019

Jumper T16 Pro - is it ready for prime time?

The Jumper T16 has been attracting a lot of attention recently - not surprisingly, as it's well equipped, runs OpenTx, and is aggressively priced. Droners and sport flyers seem to love it!

But can such a low priced radio be good enough for high value sailplanes? Could it replace my X9D Plus? There was only one way to find out- and that was to get one.

Monday, 25 February 2019

Crow-aware adaptive elevator trim

In this post I describe an adaptive trim system. It extends the function of the elevator trim, so it can adjust pitch trim at any crow brake setting. This enables the pilot to optimise pitch trim across the full range of crow in a single flight. The system is based on a Lua script.

Saturday, 9 February 2019

A 3D printed CG scale

How do you measure the CG of your model? Very likely, you'll be balancing the model over a pair of pivoting arms, or - if you're feeling lazy - your fingertips. Low cost yes, but not very convenient or accurate. Well you've guessed: there's a better way...

Monday, 26 November 2018

A 3D-printed case for the RX6R

FrSky's latest RX6R receiver is a great little device - except for one problem: it comes with a flimsy cardboard wrapper. That may be okay for a foamie, but for more serious use a proper case is required.

Tuesday, 16 October 2018

Ahi 1.0: an OpenTx template for aerobatic slopers

I've just added a new setup to my library of soaring templates. It's for 4-channel aerobatic slope soarers like the Ahi, Phase 6, Voltij etc.

Monday, 1 October 2018

Frsky RX6R - a tiny full range 6CH receiver

The FrSky RX6R sounds like the answer to a lot of pilots' prayers - a receiver small enough to fit in a Pitbull or Stribog without looking as if it's been jammed in with a hammer! What's more, the RX6R is claimed to offer 40% more range than X-series receivers. Sounds too good to be true? Let's find out... [note: updated 18 Oct 2018]

Saturday, 15 September 2018

Adaptable ballast spreadsheets, using array formulae

F3X pilots love ballast, however ballast arrangements seem to get ever more complicated. Many F3F models have multiple pockets for wing ballast, optional joiner ballast, and choice of carbon or steel joiner. The problem is knowing how to distribute the ballast so as to minimise the impact on CG.