On Feb 10, 8:39*pm, Bart wrote:
On Feb 9, 10:48*am, "John Godfrey (QT)"
wrote:

What would you do? Note that no matter what my answer is, you have no
way of verifying it - short of reverse-engineering the device.
If I was the CD or scorer (and I have been both) I would respond as
follows:

1. Expect to have your altitude trace closely compared against others.
Remember rule 6.1
2. Very nice! See 1
3. Even nicer! See 1
4. See 3
5. Show me your waiver. If no waiver, here is a screwdriver
6. Show me your waiver. If no waiver, here is a screwdriver

Hmmmm. It seems that if I ever make such a device and write two
firmware versions (AH and no AH), then, in order to fly in a contest,
I will have to
- load the version without AH support, AND
- never mention the existence of the other one.

Safety considerations aside, I think that many contributors to this
thread are concerned about devices that COULD, at least in theory, act
as an AH. For example, XCsoar is open source and runs on Android
phones, some of which have gyros. Lousy rate gyros, but gyros
nevertheless. Anyone with the necessary skills can modify the
application to display some sort of AH.

I guess what I am getting to is that you either trust the pilot or you
don't. If the rules are tightened enough to prevent any sort of AH in
the cockpit, then there may be no pilots willing to compete. I am
certainly not flying, competition or not, without my Android phone.

Bart

Just curious- what is so critical to your flying that you won't fly
without your phone?
UH