David P Williams

Well Steve the Evolution Models website has some clues

I'm in the process of buying a new build house with air source heat pump, underfloor heating, solar panels, storage battery and EV charger already built in, and the house has been designed around all that. After reading all this I'm hoping I'll be warm enough!

Or go to Mike who makes them at Model Radio Workshop

John - I assume you have installed the LUA script for the SR6 on the Horus?

G version for I/c please, I have a few 52fs lying around.

One for me too please Richard, with all the available extras thanks.

Yes a great day. Not able to take any models and fly this year, but next year I should be living a lot closer to Buckminster so look forward to taking part properly. Enjoyed chatting to some of you and thoroughly enjoyed seeing the very varied models and good flying.

With family in Peterborough now, so I’ll be there tomorrow

Like Geoff, I'll be there on the Saturday but not flying. Visiting family in Peterborough and the car will be full of stuff.

The list of jobs she’s lining up here will probably scupper things….

Great news Richard. Impending house move will delay my Tempest build but I’ll be buying a Mossie when they’re ready. Currently negotiating with SWMBO over a trip to Buckminster next weekend - we were over house hunting in that general area last weekend and are buying a house about 25 mins away.

Tony Nijhuis has 70mm Provost, Hunter and Gnat kits if that helps.

Sailing is ground based compared to an aircraft. Once again, please don't confuse airspeed and groundspeed. If you are flying in a full size aircraft, into wind, throttle set to cruise and trimmed for straight and level flight, you will have a constant airspeed. If you look out, you will see you are moving over the ground at a particular rate. If you turn cross wind your airspeed will be the same after the turn so you will neither climb or descend and you will have a different movement across the ground - you will be moving diagonally across it relative to the aircraft's heading. If you turn downwind the same applies but you will observe that the rate you are moving over the ground is now greater than on the upwind leg, and so on as you complete the circuit. Your airspeed and height will remain the same (ignoring the compensations for the lower lift in the turns). The aircraft does not "balloon" turning into wind or descend turning downwind because it doesn't know about the wind. Wind speed is the measurement of the movement of the air relative to the ground, which is important to an observer on the ground but irrelevant to an aircraft in that air apart from navigation considerations.

Just to add - kinetic energy only matters if the aircraft encounters the ground, where it’s groundspeed can vary enormously depending on the movement of the air relative to the ground (i.e wind), hence why we much prefer to land into wind.

The mass of air doesn’t change. The aircraft is flying in a ‘block’ of air. If this block is moving relative to the ground, it is perceived as ‘wind’ on the ground. The aircraft doesn’t know the block is moving, it is just flying through it. Its groundspeed is irrelevant, and kinetic energy is irrelevant as its airspeed stays the same. The ground doesn’t matter other than to potentially generate turbulence if the block of air is moving over it, i.e the wind is blowing for a ground based observer. Your sailing analogy is also irrelevant as the boat is ground based not air based.