# Ardupilot Mega Full Case v.1.2

Hi all friends .

This new Open Source case for Ardupilot Mega & GPS module & Receiver module & Telemetry module & Airspeed module .

Telemetry module = Xbee Pro 900MHz

GPS module = GS407 U-Blox5 GPS 4Hz

Receiver module = Hitec Optima 9

Airspeed Sensor = MPXV7002DP

Assembly Animation :

Mass properties :

Mass = 61.75 grams
Volume = 382.15 cubic centimeters
Surface area = 1940.78 centimeters^2

Center of mass: ( centimeters )

X = -1.69
Y = -1.59
Z = -7.44

Principal axes of inertia and principal moments of inertia: ( grams * square centimeters ) Taken at the center of mass.

Ix = (1.00, 0.02, 0.01)       Px = 891.24
Iy = (0.01, 0.00, -1.00)       Py = 2488.92
Iz = (-0.02, 1.00, 0.00)       Pz = 2930.28

Moments of inertia: ( grams * square centimeters ) Taken at the center of mass and aligned with the output coordinate system.

Lxx = 891.98    Lxy = 32.27    Lxz = 19.30
Lyx = 32.27    Lyy = 2929.77    Lyz = -1.27
Lzx = 19.30    Lzy = -1.27    Lzz = 2488.69

oments of inertia: ( grams * square centimeters )Taken at the output coordinate system.

Ixx = 4469.32    Ixy = 198.80    Ixz = 796.73
Iyx = 198.80    Iyy = 6526.87    Iyz = 731.40
Izx = 796.73    Izy = 731.40    Izz = 2822.34

Created by ZXO003  & SolidWork 2010

Views: 2085

Comment by george on August 16, 2011 at 12:40pm

Does it not matter if the Ublox gps is positioned vertically or horizontally? I thought the vertical position was ideal but in your picture it is placed horizontally. My flying wing doesn't have the height to place the ublox vertically so it would be great if I could still get great performance placing it horizontally. Nice box btw!

Comment by Sebastian Gralla on August 16, 2011 at 12:55pm

the ublox has a spherical antenna, so it has good reception in almost every position

Comment by Avalerion on August 16, 2011 at 1:12pm

Any ideas as to where one could get this built…?

Comment by george on August 16, 2011 at 1:36pm

@Sebastian

Thankyou kind sir for the info!

@Avalerion

Maybe try ponoko? It's a bit large for my makerbot.

Comment by Pieter van Woerkom on August 16, 2011 at 1:58pm

Me has a router :) Would like to reccomend building it from 1,5mm aircraft multiplex (like i did) leaving room for 2mm deprom dampning. I allso lightened the box by opening te walls.

Comment by Dr Mike Black on August 16, 2011 at 2:33pm

I can laser cut it for you, if you wish.

Its one of the things we do eveyday.

If you wish to see what sort of quality of work we do, please have a quick look at the lasing cutting on my prototype Hawker Tempest Mk5

Be good to do something different.

Hope this helps.

regards,

Mike.

P.S, not wishing to step on anyones toes here.

Comment by Sean Skirvin on August 16, 2011 at 3:54pm

Dr. Mike Black, how much would you want to cut the design by Pieter van Woerkom out of the same 1.5mm multiplex?  Shipping would be to Ohio, USA.

Sean Skirvin

Comment by Kirby on August 16, 2011 at 7:21pm
george and Sebastion
It does actually matter which orientation the ublox antenna is pointing. The radiation pattern is actually a hemisphere. This information can be found on the antenna manufacturers website as follows: http://www.sarantel.com/products/sl1206

I hope this helps

Chris Kirby
Comment by Dr Mike Black on August 16, 2011 at 10:54pm

HI Sean,

Chris is right, Ublox or similar helical antenna, must be vertical, or perpendicular to the sky, this is very important.

So you need to change that, even if the antenna exits the box through a hole(un obstructed view of the sky also important)

Ok, i dont feel its right to bandy money about on this forum, but.

I need a DXF/PLT of just the parts to give you an accurate cost, but in real terms....not much..

shipping to US for summet like that, about £4, as the machines run at 55meters a minute (and we charge by the minute), material costs are very low, a few quid at most. As this is a personal offer i would do it cost anway

So, if you want me to accuratley cost it for you, please let me have a DXF or similar with scaling.

Something worth thinking about is coloured acrylics, more expensive material, but weight for strength, this would look VERY cool as a 'homage' to DIYd

VERY nice SW work by the way....

I use a similar method for prototyping, here is a small preview.

Wings

Rear Fuselage

Let me know.

regards,

Mike.

Comment by Sean Skirvin on August 17, 2011 at 12:58pm
Sorry about being so blatant in my question. I was impressed with your cuts for your Hawker Temptest, and I was just looking for more of a ballpark of what something like this box would cost to have done.

Sean Skirvin

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