Michael Levesque
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Michael Levesque's Discussions

PFD unstable when airspeed is enabled

Started this discussion. Last reply by Michael Levesque Jul 11, 2013. 4 Replies

Hi everyone, This is my first Forum/ APM Experience... I am trying to have my X8 fly with the airspeed sensor but I am having a really strange behavior. I have the APM 2.5 directly from 3Drobotics,…Continue

Tags: ground, speed, groundspeed, air, oscilations

 

Michael Levesque's Page

Latest Activity

Tommy Larsen replied to Michael Levesque's discussion Possible Composite X8 in the group X8
"''yeah I would like one" :)"
Dec 11, 2013
Patch Thompson replied to Michael Levesque's discussion Possible Composite X8 in the group X8
"I'm in for a pair if this moves forward….. X8 carbon Kickstarter Campaign?? As opposed to "Just" an x8, it would be great to compile all the mods and custom revisions into an open source file; things like: -Tapered rear…"
Dec 10, 2013
Steve Keep replied to Michael Levesque's discussion Possible Composite X8 in the group X8
"I strongly disagree with the issues you guys are raising about weight. If you build it right it can be very strong and still quite light. I fly fully moulded gliders and they are bullet proof compared to what is required for a X8  I Like the…"
Sep 19, 2013
Hans Miller replied to Michael Levesque's discussion Possible Composite X8 in the group X8
"YES!"
Aug 18, 2013
Simon Howroyd replied to Michael Levesque's discussion Possible Composite X8 in the group X8
"although I have just put a 5mm carbon web along the length of each wing just in front of the elevons, 600mm length. Has enabled me to have another 10m/s before flutter happens. Simple, easy & very light, but it is a bodge."
Aug 18, 2013
Ronald Pandolfi replied to Michael Levesque's discussion Possible Composite X8 in the group X8
"Hi Zedtwitz, Both the FDM (Stratasys Fortus Ultem) and SLS (carbon filled polyamides from SolidConcepts) we have used for X8 sized blended wings yield no discernible surface roughness, although grooves could be added to minimize drag for low…"
Aug 18, 2013
Ronald Pandolfi replied to Michael Levesque's discussion Possible Composite X8 in the group X8
"Hi Jason, It only takes a few hours to print an X-8 sized aircraft using SLS. (It takes about 36 hours with FDM.)  The principal hurdle is cost.  Glass filled or carbon filled nylon is expensive and only a few production facilities are…"
Aug 18, 2013
Jason replied to Michael Levesque's discussion Possible Composite X8 in the group X8
"With all due respect, if there is a large interest in this, a printed X8 won't be viable for people who have no patience.  Like me  =)"
Aug 18, 2013
Jason replied to Michael Levesque's discussion Possible Composite X8 in the group X8
"!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!OMG YES!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!"
Aug 18, 2013
Ronald Pandolfi replied to Michael Levesque's discussion Possible Composite X8 in the group X8
"There are several composite blended wings available including fiberglass and carbon fiber.  One is now in service in Africa supporting counter poaching missions.  Optimized composite blended wings have a somewhat different shape as…"
Aug 18, 2013
Simon Howroyd replied to Michael Levesque's discussion Possible Composite X8 in the group X8
"I could be interested!"
Aug 18, 2013
Michael Levesque added a discussion to the group X8
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Possible Composite X8

Hey guys! (and girls) I noticed a lot of people do love their X8 but they are pimping them quite a lot... Most of the time going above the max weight of the aircraft or going faster creating flutter. A composite airframe would help a lot in stiffening the desing and pushing the enveloppe. If I was to produce a composite airframe from an X8 completly in fiberglass, would there be interest from members in this forum? I do not know how much it would cost so far. Just a ''yeah I would like one""…See More
Aug 18, 2013
Michael Levesque replied to Michael Levesque's discussion PFD unstable when airspeed is enabled
"Great! Really helpful! there is a lot of work on the table so I will get to it! Thanks again for your help. It will be easier now that I know what to look for. "
Jul 11, 2013

Developer
Andrew Tridgell replied to Michael Levesque's discussion PFD unstable when airspeed is enabled
"Hi Michael, In the log file you sent me there are a lot of parameter changes during the flight, so it's a bit tricky to evaluate, but there are a few things I can help with. First off, I suspect you may have loaded a config file from someone…"
Jul 11, 2013
Michael Levesque replied to Michael Levesque's discussion PFD unstable when airspeed is enabled
"Awsome Thanks a lot for the help! Here is the Tlog file. I hope that I nailed the issue correctly and not mis-interpreted the data. The Waypoints are really close to each others... my safety pilot was a little stressed. Next time I'll try to…"
Jul 10, 2013

Developer
Andrew Tridgell replied to Michael Levesque's discussion PFD unstable when airspeed is enabled
"Hi Michael, The airspeed being erratic on the ground is normal, as the airspeed goes as square root of pressure difference. It will settle down once you above about 5m/s, and get more and more accurate as it gets faster. Do make sure you calibrate…"
Jul 10, 2013

Profile Information

About Me:
Not much right now
Please tell us a bit about your UAV interest
Love flying wings, I think it is the perfect way to minimise the wet area not used for lift. Former merber of VAMUDES at University of Sherbrooke, I still love UAVs for their great potentials and accesibility
Hometown:
Sherbrooke

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