I am not sure if this is one of the purposes of this site, if not, please remove/move to the correct site.

I recently bought a CX20 drone that was said to be open source. I have not been able to find the CAD files or software anywhere. Is there a standard location that this data is kept for open source projects?

Here is a link to the product.

  • 4
    The first place to ask would be the store you bought it from. But there's a chance someone else might know. Commented Oct 17, 2015 at 15:13

2 Answers 2


There is no standard for publishing/archiving source code for an open source project. Many organizations use a public repository (e.g. GitHub), others provide access via a download from their site. It is also common to include the source with the install/binaries (e.g. .zip file) or on any distributed media with a product.

The Open Source Initiative, the stewards of the Open Source Definition, and an internationally recognized authority in open source standards and practices, requires access to un-obfuscated source code. So if the organization distributing the software is claiming that that software is open source, they must provide you the source.

A suggestion for your specific case would be to simply contact the company that sold it to you (as @curiousdannii mentioned).


Cheeson violates our open source license that we have on ArduPilot and unfortunately they have not published their files. You can find out more about the original files at http://ardupilot.com/

  • Thanks for this answer and welcome to the site! Sorry to hear about your stuff being used in violation of the license you provided. Have you considered contacting the FSF?opensource.stackexchange.com/questions/52/… May be relevant.
    – Martijn
    Commented Oct 19, 2015 at 17:19
  • @Martijn, unless OP gave the rights to the FSF, they have no standing. They might want to/be able to point in the right direction, but no guarantee.
    – vonbrand
    Commented Oct 19, 2015 at 20:26
  • @vonbrand they have no standing, but they do give assistance, even if they can't sue themselves, and help with the options available.
    – Martijn
    Commented Oct 19, 2015 at 20:33
  • Even lacking standing, there are other benefits - seeking legal advice re: what sort of recompense/redress is available as @Martijn said. Perhaps, more importantly they'll have access to expert witnesses (RMS drafted the darned license after all), have garnered respect of the courts s.t any of their amicus curiae, will lend gravity, and finally will have the institutional knowledge w/r/t the latest case law. ("_ v _ 20__, ruled 9-0 [a binding authority] with a unanimous opinion relevant to your __ argument; or the 9th circuit had a very similar argument and has persuasive authority)
    – Andrew
    Commented Oct 28, 2022 at 20:00

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