all Hey, there is such a device now available. Its called Bob Fiorenzes Airspeed Indicator. I have been testing it and I reviewed it for RCM. I have flown it in two airplanes and it works great. I have been promoting the idea of having this capability built into the control system-with no luck. This gadget gives a digital readout plus and audible warning of an approaching stall. Just go to www. rcaviation.com/fiorenze for more info. There is no question but what knowing your airspeed will greatly lessen the possibility of a stall and a woeful landing or at any other part of the flight