|From:||Prof. Dr.-Ing. Heinrich Warmers|
|Subject:||Re: [Paparazzi-devel] Flying wiht BMP085 pressure sensor|
|Date:||Tue, 16 Aug 2011 01:01:29 +0200|
|User-agent:||Mozilla/5.0 (Windows; U; Windows NT 5.0; de-DE; rv:1.4) Gecko/20030619 Netscape/7.1 (ax)|
we use the static pressure of a pilot tube from the eagle TAS interface.
The aircraft was a delta with 0.8m span. The tube was mounted in the front of one wing outside the propeller generated turbulence.
Holes are about 6cm away from the wing.
The sensor was far away from other electronic.
We found for our measure system used for metrology measurements (a small box with Tini1.3 and the sensors) a lager noise +-0.7m
compared to +-0.35m for the separation.
We flow in an altitude of 35m. The temperature did not change.
I think the most of the delta in altitude was generated by the constant TAS feed back control system.
The idea with a second static pressure measurement on ground is possible but expensive (a second tiny with telemetry and pressure sensor).
Is there any ftti chip with i2c or SPI interface?
How it is possible to send the static pressure from the ground station to the aircraft periodically?
Christophe De Wagter schrieb:
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