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Re: [Paparazzi-devel] Automatic Takeoff and landing

From: Nathan Aherne
Subject: Re: [Paparazzi-devel] Automatic Takeoff and landing
Date: Wed, 21 Apr 2010 05:50:55 -0500 (CDT)

Hi Pascal,

Thank you for your reply, much appreciated!

I am having most trouble with the fact that the aircraft starts from the lon 
and Lat in the flight_plan file and I cannot work out how to move it. Am I able 
to specify the start point for the aircraft?

Kindest regards,

Nathan Aherne
Reddog Technology
Email: address@hidden
Mob: 0402 555 080

----- Original Message -----
From: "Pascal Brisset" <address@hidden>
To: address@hidden
Sent: Wednesday, 21 April, 2010 7:50:09 PM
Subject: Re: [Paparazzi-devel] Automatic Takeoff and landing


> *Pre Flight Checks* - is it possible to code something similar to the 
> preflight checks on a normal aircraft?
 For example ?
> *Building a runway takeoff* - I cannot seem to set the start point of 
> the aircraft for takeoff (maybe it would be good to set a start point 
> dynamically when I push takeoff). The start point seems to be the Lat 
> and Lon in the flight plan file.
> I would like to be able to
> 1. Have a dynamic start point when I push takeoff (or other button)
 You can use the  NavSetWaypointHere() macro to set the waypoint 
(example in MOB block in basic.xml)
> 2. Have the aircraft travel down the runway with slight down elevator 
> until above minimum speed.
 Use the "throttle" vertical mode:

   <go vmode="throttle" throttle="0.314" from="RunwayStart" 

where the pitch attribute should give you some down elevator
> 3. Move elevator to certain up pitch
> 4. Fly to waypoint Climb
 Back to standard takeoff
> Is the above possible?
 You will say it !
> How do you keep the aircraft from going off the side of the runway 
> given the GPS is not that accurate?
 Try :-) How is directed your front wheel ? You will have to play with 
the course_pgain (probably different from the "air" one)
> If it is possible, I have no idea how to do any of the above, could 
> someone point me in the right direction?
> *Runway Landing.*
> Are runway landings possible with a good degree of accuracy?
 Repeatable automatic landing in a 25x25m square, without barometer, is 
our (the historic team) best achievement with a Slayer 

Good luck


PS: Feel free to feed the wiki with your understandings of the system 
and your experiment results :-)

> Kindest regards,
> Nathan Aherne
> Reddog Technology
> Web: <>
> Email: address@hidden <mailto:address@hidden>
> Mob: 0402 555 080

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