http://www.androidzoom.com/android_applications/productivity/aircraft-horizon_zcuz.html


  Robin Bergland.

  That would be worth buying a small Android tab just for that.


http://www.everbuying.com/smlclass854.html?gclid=CJr9qfbE7awCFUWMtgodigzI9A


  Paul Lamar


 "Aircraft Horizon provides pitch and roll information, based upon the
 orientation of your phone depicted as a typical aircraft artificial
 horizon."

 Obviously not gyro-based, just the internal accelerometer. That's a
 seriously fatal flaw.

 -Chris W

 Why?

 Paul Lamar

An accelerometer-based instrument displays the resultant of forces, so a
coordinated turn would show the wings to be level, as the sum of the
gravity vector and the centripetal force of the turn point to the bottom
of the airplane.
Victor Roberts


That is  assuming steady state but these are rate sensors I think
so the rates are integrated to get position. Check out WingX. I am not
totally
convinced until I see it working in an aircraft.

http://www.youtube.com/watch?v=EItR32hxItw


Back in the old days before GPS airliners used three Honeywell
$100,000 ring laser
rate gyros that got them within a few miles on a trip from SFO to Hong
Kong.

These were not sold to the Russian's :) They were also used in boomers.
Lamar Instruments computerized speed and distance measuring equipment
was used to check them. If a missile missed Moscow it was my fault :)

http://www.rotaryeng.net/IEEE-road-test-sys.pdf

Paul Lamar

The Wing-X display requires an external ADHRs. I use Wing-X and the
attitude display is not available from the IPAD sensors. Low-cost MEMS
rate gyros can be used to determine rate of displacement but need other
assist to provide a reliable attitude display.  Dynon and others use
MEMS rate gyros assisted by 3-axis magnetic sensors and a sophisticated
program to derive the display.

Victor Roberts

http://www.hiltonsoftware.com/index2.html

Data and Attitude Heading and Reference Systems

I see absolutely no requirements anywhere on the WingX web site
for a DAHRS. All I see is an Ipad and $99 dollars.

Imagine what would happen if you bought the product for $99 and suddenly they
say: "BTW you need a DAHRS system and that will cost you $795."

http://www.aviation.levil.com/AHRS_mini.htm

It was only when I read the AOPA review article was that mentioned.

"When connected to an AHRS, the iPad is capable of displaying GPS-based
synthetic vision in a split-screen mode (left) or full-screen landscape view
(below) or portrait view (shown here on Hilton Software’s WingX Pro7).
Aviation software developers are racing to provide applications aimed
computers indispensable to GA pilots."

"Hilton Software founder Hilton Goldstein said iPads are showing tremendous
potential to lower the cost of flying."


Surely there is not a mechanical gyro scope in that DAHRS?

What type of SS gyro's are aviation.levil.com using?

Paul Lamar