Did a full size Spitfire make a low pass over JOMAC on Saturday, or was it Greg's scale model. You decide.

Flemming's electric glider now has an on-board variometer. Well, more than just a variometer. It's combined with a GPS device. It measures, records and transmits not only the rise and fall of the aircraft but also speed, height, location -- the Full Monty.
The feedback to the pilot is by a rising and falling tone punctuated every now and then by a businesslike female voice giving height above ground.
The tube attached to the fin is a Total Energy Sensor. This allows the device to integrate the kinetic and potential energy of the aircraft. In theory, if the aircraft loops, exchanging speed with height around the loop, the device will give out a constant tone. And so it does. I've seen it with my own eyes, and heard it with my own ears.
Remarkable.

Dave's colourful Farmhand. 

50 cc petrol engine.

Made from plans and a short kit from RC Modelworld.

A couple more shots of Alex and his electric Four Square.

Durban Deep Radio Flyers, wetting of new runway and get together

We went to DDRF by invitation for the "Wetting of the New Runway". Ted and his grandson went as well.

More photos here

Here's a short clip of some of the DDRF helicopters.

 

Launching an Easy Glider.

A bunch of helicopters

Not sure who the pilot is, but as you can see, it was quite windy.