Here is my quick mod to make it easier to fill up my Easy Star with all the gear. The lid will be held in place with 6 pair of magnets glued to the fuselage. I did the prototype with 3 mm balsa but the next version will be in 2 mm ply. I will probably make a box on top for the APM and better pockets for the XBee and GPS.

 

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Comment by Phil Cole on March 29, 2011 at 7:21pm

Maybe do some testing to see if having the Xbee that close to the GPS receiver and with the antennas aligned desensitizes the GPS (e.g. compare time to GPS lock with the Xbee powered and unpowered. If the GPS locks instantly both times, try it indoors near a window so the GPS has to work a bit harder).

 

It may not be as neat, but I'd put the Xbee as far away as possible from the receivers (RC and GPS).

Comment by Alexandre Girard on March 29, 2011 at 10:47pm
Excellent mod! we were just planning to equip our easystar this week with all ardupilot board, and this design will greatly help us to make it easier (current opening is way too small, and cables are too messy to git everything in).

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Comment by RC Tech.se on March 29, 2011 at 11:15pm
Thanks, i will try to fly it in a few minutes. No wind this morning. :-)

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Comment by RC Tech.se on March 30, 2011 at 12:26am
It flew fine. I followed Phil's advice and moved the XBee to the wings. I also had to move the battery to the back an inch or so.

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Comment by RC Tech.se on March 30, 2011 at 12:28am
No, i didn't forget my wings... :o)
Comment by Alexandre Girard on March 30, 2011 at 7:00am

Some questions:

 

Do the pitot need to be inserted as show on the last comment image, or can they be mounted on the wood?

Is their position important for the measures? can they be placed further back on the plane?


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Comment by RC Tech.se on March 30, 2011 at 7:58am
My pitot is not enabled yet. i saw that mounting in the APM manual here: http://code.google.com/p/ardupilot-mega/wiki/Airspeed. I guess you can mount it anywhere you like as long as it is pointing forward and is not affected by a propellerstream. Check the manual. Good luck!
Comment by Warren Osborne on March 30, 2011 at 10:05pm

My understanding of it is, you should be right as long as the pitot tube is not affected by disturbed air flowing around the fuselage (or wing) of your plane. So keep it a little away from the plane's body wherever you put it. That's why its toward the front of the Easystar in that picture (or out a little from one of the wings on other models) - to get it out in clean air. I believe its less important for the static tube provided you don't put it somewhere like directly over the wing where the pressure is lower (provided you're flying of course :-) ).

Comment by David Burke on March 31, 2011 at 7:16pm
I really like the mods however my plane has an afinity for the ground, so much so that my daughter said it now looks like a jijsaw puzzle. She dubbed it Saw I after the movie. Anyway if yours doesn't land more or less in a level latitude I will be interested in whether the nose holds up ;-)

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Comment by RC Tech.se on April 1, 2011 at 3:10am

Well i am planning to fly it "Granny style" (nice and slow). The EZ usually does something like this when it goes down:

I noticed that the front was sturdier with my lid on. I am scrapping the magnets for holding the lid. i will use electrical tape and just wrap it together like in my preflight pic. I am making a new version in lightweight ply this weekend with a box or "coffin" running along the length of the lid for the APM, GPS and possibly a camera in front.

 

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