What do these devices do when you live in a place that is surrounded by mountains? It seems like they would have a problem unless you were on perfectly flat ground as far as the eye (or photodiode) could see. --Ian ----- Original Message ----- From: "Benjamin Bromilow" To: Sent: Monday, August 27, 2001 5:27 PM Subject: Re: [EE]: "Tilt-o-meter" for RC plane > They're still available. Called the HAL 2001. Cost about 50 pounds.... > > Ben > > ----- Original Message ----- > From: Alan Gorham > To: > Sent: Friday, August 24, 2001 4:42 PM > Subject: Re: [EE]: "Tilt-o-meter" for RC plane > > > > A couple of years ago in the UK, there was a wing levelling/autopilot > device > > that used optical technology. > > Basically, by sensing the difference in light level between the ground and > > sky on the horizon the device was able to keep the plane in level flight > and > > on a straight heading. > > > > It had an adjustable gain control that allowed the pilot to set the amount > > of correction the autopilot applied. > > > > I flew someone else's plane with one of these devices fitted and it was > > pretty impressive. > > > > I'm not sure if it would be exactly what is required here, in that it is > > more of a stabilising device rather than a true controlling device. -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.