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Old Jun 08, 2011, 05:17 PM
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I think the written word is pretty clear - overrides any onboard system. Isnt' an RC control an onboard system? it's definitely not a system that sits on the ground....
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Old Jun 08, 2011, 07:03 PM
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Originally Posted by Pants View Post
I think the written word is pretty clear - overrides any onboard system. Isnt' an RC control an onboard system? it's definitely not a system that sits on the ground....
well, if people are using the failsafe settings in their receiver to do the flight termination (which I think is valid), then the receiver in that case is part of the flight termination system, so it wouldn't fall into "other onboard system" in that case, as its part of the FTS. So I don't think it is obvious if RC override is allowed.

I think the rules try to make things as safe as possible, and I think allowing RC override in visual range is safer for the reasons I've given, but the organisers may have good reason for not allowing that, and probably have thought about the safety aspects of this a lot more than I have. Thus the question :-)
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Old Jun 09, 2011, 12:43 AM
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... but the organisers may have good reason for not allowing that, and probably have thought about the safety aspects of this a lot more than I have. Thus the question :-)
Maybe, but don't make that an assumption, they are people in a committee. Both these systems have been known to be fallible, they may need an off-board fail-safe.
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Old Jun 15, 2011, 03:43 AM
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Design questions are for teams to figure out, hence the 'challenge'. I can not comment on anything that will influence a design or benefit one team over another.

Sorry, just thought I'd throw it in :{

Dr S
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Old Jun 21, 2011, 11:07 PM
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Deliverable 1

Hi guys,

I was wondering if any of the previous entrants would be willing to share a previous report used for deliverable 1, just so that my team and others can get a feel for the content and detail needed.

Thanks.
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Old Jun 23, 2011, 06:26 PM
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The rules document states what is required?
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Old Jun 28, 2011, 08:51 PM
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Hi guys,

I apologize for posting this here but I thought that it would be more of use to you guys than in another for sale post.

IT'S NOW SOLD!
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Old Jul 01, 2011, 07:47 PM
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unopened container?

The rules specify that the drink dropped for the S&R challenge must be an "unopened container". Does that just mean it isn't opened when it lands (ie. it hasn't split open due to impact with the ground), or does it really mean it must be a store bought bottle that has never been opened by the team?

We've done our drop tests so far with a metal water bottle so it would have a bit more strength. We also use a small chute, but we'd still prefer a strong bottle. Maybe some entrants from previous years (or the organisers!) could comment on whether that was allowed?

Cheers, Tridge
canberrauav.com
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Old Jul 01, 2011, 08:23 PM
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Originally Posted by stikmunkeyrc View Post
Hi guys,

I apologize for posting this here but I thought that it would be more of use to you guys than in another for sale post.

Team Javelin is not going to the UAVOBC this year or the foreseeable future.
Do you mind if I ask why you have decided to drop out of the competition?
And what kind of price range are we looking at for this magnificent bird?
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Old Jul 02, 2011, 03:27 AM
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How are other teams doing the drop mechanism? I was thinking of a compartment which simply opens up underneath allowing a foam box to fall that contains a plastic water bottle and then a bladder inside the plastic water bottle.
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Old Jul 02, 2011, 10:33 AM
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The rules require an unopened container.
We tried a bush walker's metal container, but we could not find it again.
We tried another metal container with a 200mm chute - it was badly damaged.
We tried the cover (delete metal frame) of a child's umbrella for a chute - It drifted a bit far.
We considered padding, but found it added too much to the bulk.
We will continue to experiment.
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Old Jul 02, 2011, 05:46 PM
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How are other teams doing the drop mechanism? I was thinking of a compartment which simply opens up underneath allowing a foam box to fall that contains a plastic water bottle and then a bladder inside the plastic water bottle.
You can see some photos of the various mechanisms we've tried on our site, along with videos of the results:

http://photos.tridgell.net/v/CanberraUAV/

As Jack said, we're still experimenting :-)
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Old Jul 04, 2011, 09:02 AM
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I have finished candidate for my deliverable 1, I am releasing it here so other people may have some bearing on what to do (although I must point out that this is my first time, but I always wanted something to reference from so hopefully this helps some people) and so people might read it and correct on any areas I have got blatantly wrong or left out.

http://www.phyction.com/outbackchall...201%202011.pdf
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Old Jul 04, 2011, 06:18 PM
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I have finished candidate for my deliverable 1
Nice work! I love the fact that you cover the possibility of a flash flood - that is thorough and topical :-)

We're still working on ours, although if you poke around on our mailing list archives you can see some drafts.

The approach we took in drafting is to go through the rules doc paragraph by paragraph, and ensure that every paragraph that is marked as needed for deliverable 1, or where it is ambiguous if it is needed, is covered. This is also our first time in the competition, so we don't really know if we've taken the right approach.

I'm really looking forward to seeing your airship fly!

Cheers, Tridge
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Old Jul 06, 2011, 02:47 AM
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Thanks Tridge, I'll keep a lookout for your report on Google Docs.

Going to submit my report this Sunday once I find out how to write equations so they don't appear blurry, hopefully all goes well.

To the previous contestants, how long does it usually take to get a go/no-go decision? Will I be waiting days? Weeks? Months?
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