Its been a while so lets try again. Had a hangout with Chris and we briefly spoke about the next T3 round. Chris will work on a top prize ;-)

The mission is simple, get airborne climb to 20m 

Fly a cube with 50m sides, pausing for one minute at each corner, so your flight time cannot be anything less than 8 minutes..... Bonus points if you can stay longer at each corner....

The neatest cube KML wins.

If you can do this with a 3D aircraft I feel you would have a very strong chance of winning!

I will close the competition on April the 14th. I will be looking at where you are flying very closely. Please don't try this in public places or within 500m of any building / road. 

Views: 13676

Comment by John Church on February 22, 2013 at 11:03pm

It's not supposed to be easy.  ;)

Comment by R. D. Starwalt on February 23, 2013 at 7:48am

I am with Robert L on this, a path-edge cube?

If so, that is six squares, four vertical, two horizontal.


Comment by Gary Mortimer on February 23, 2013 at 10:26am

Its a cube, if KB can write a love heart with an aircraft (yes I know three flights) over a large area where the law allows it multirotor drivers ought to be able to make a little cube.

Comment by J on February 23, 2013 at 11:37am

@Gary  Thanks & no worries, I wasn't misled. I was asking because the 3DR affiliations are not posted anywhere that I know of & typically infomercials are for hire or trade in a market.

Comment by Rob_Lefebvre on February 24, 2013 at 5:10pm

Great to see the T3 contest back.  If you're using the arducopter code I think you'll have some problems because there's a bug in the navigation where it ignores altitude component when deciding whether to consider that waypoint complete.  I'm sure it's a very small issue somewhere so if someone finds it they may want to post it so multiple people don't waste time fixing the same bug and can focus on other parts that might make the cube better.

In case anybody is wanting to try this with Arducopter, it is possible.  I was doing some test flying today with a 3DR quad, getting ready to do an entry.  I was able to do a vertical leg.  All I did was fly to a waypoint at 20m. Then I put a 10 second loiter (just as a test), then I used CONDITION_CHANGE_ALT command, and entered an Alt of 10m, and a Rate of 50 cm/s.  Then another Loiter for 10 seconds, which I'm not sure if it's necessary, but I think so based on what I saw.  Unfortunately after the second Loiter, I had RTL, which was set for 20m.  

It flew to the waypoint, stopped for 10 secs, then descended to 10m.  I think it just about reached it, then it started climbing for the RTL.

But just to show this is possible if you play around with it a little bit.

I managed a 15 minute flight with a 4S 5000 battery.  So 60 second loiters should be possible, and I will probably push for 90 though this might be risky.  I am also going to think about using parallel 4S 5000 packs...  We'll see.

There's a good snow storm coming this week bringing another foot of snow.  That'll make my entry to the field REALLY interesting!  Dany, if you want to come on over we can work on it together.  I'll need somebody to pull winch cable. :D

Comment by Rob_Lefebvre on February 24, 2013 at 5:15pm

Oh, I'd also still love some tips on how to set waypoints at 50m exactly.  I see that MP has a handy thing as you're laying out WP.  In the top-right corner there is a read-out which gives you distance to previous waypoint.  But I'm wondering if there's any way to get something really accurate and orthagonal?

Comment by Richard Boyhan on February 25, 2013 at 7:31pm

Here is my first try at this.  Unfortunately I messed up on the top front edge of the cube.  Also had a messed up at the end, with a bit of a fly away and I had to RTL to bring the Quad back.  50 meters up is the highest I've every flown and it was scary.  The day had a small breeze blowing at Vista View RC airfield in west Broward County, FL.  My Quad is a Standard 3DR Quad running 2.9.1.  I also setup a bit of spin at each corner.  Hope to try this flight plan with my Hex after I repair it.  It crashed Friday with a power failure.  Still have to figure out what happened.

3D Robotics
Comment by Chris Anderson on March 3, 2013 at 5:23pm

Gary, apols if I missed it but did you answer the question as to whether every edge of the cube had to be flown, or just the corners?

Comment by Richard Boyhan on March 3, 2013 at 8:00pm
I've found that to wait at each corner for 1 minute is actually taking over 10 minutes. Which is close to the limit of my battery. I'm waiting 1 minute at each corner, which means I end up spending an additional minute at each beginning corner. Is this nesseccary or can just move past this?
I think we need to draw all the edges of the cube, it makes the cube that much harder and a more interesting problem to solve.

3D Robotics
Comment by Chris Anderson on March 3, 2013 at 8:03pm

Gary, I think we should reduce the wait time at each vertex to 10 seconds, for the reason Richard gives above. 


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