Dick Wood makes a nice electronic thermal plotter displaying the temperature over four minute. (This requires good programing and hardware skills!) A separate wind speed meter called Windtronic, sold by Dave Edmonson, can be screwed onto Dick’s box, displaying the current wind speed. (I happen to use this system, roughly costing $500.) The Russian F1C flier Leonid Fuzeyev has a temperature/wind velocity electronic device with an excellent reputation, but I have not seen it in the States.
At the Maxmen I’ve seen Mike Woodhouse used a thermal and wind speed plotter and made by Pim Ruyter with two pens tracking on a 2â€