Crow-aware adaptive elevator trim

If you fly F3X sailplanes, you'll know that crow brakes are an essential feature. They allow you to control rate of descent independently of the pitch control. Crow brakes are used primarily (a) to control the landing approach, or (b) to lose height quickly, without tearing the wings off!

A 3D printed CG scale

How do you measure the CG of your model? Very likely, you'll be using a variation of the 'balance arms' method, where you locate the model on so the CG coincides with the pivot. While this method is low cost, it's not very convenient. Well, now there's an easier way...

A 3D-printed case for the RX6R

FrSky's latest RX6R receiver is tiny, and offers excellent range. It's perfect for the modern breed of F3X models with pencil thin fuselages - except for one problem: it comes with a flimsy cardboard wrapper. That's okay for a foamie, but not for an F3X model like my Stribog.

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.

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]

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.

Photo magic at the Welsh Open

Here's a publicity shot by MKS, using two of my images. It shows Joel West winning the recent Welsh Open. I think their graphic designer has done a rather nice job!