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For some spurious story board reason that I have not padded out properly Wimbledon has ball delivery issues!

The T3 task this time is to deliver as many tennis balls as possible using only one 5000 maH battery, to both power the plane and autopilot. Fly between two virtual Wimbledon tennis courts. Take off from Number one and Land and deliver to number two. Then fly back to number one to pick up more balls. Repeat until the battery is flat.

The courts are roughly 20 X 40 m.

Number one and two courts are 300 metres apart.

You will have to soar over centre court, the roof of centre court is 16m above the playing surface so your craft better achieve at least 30m altitude to avoid flags and furniture in its transit between the courts. You could choose to fly around centre court but your KML must show that you virtually missed it!

For the sake of this exercise I will ignore the sides of 1 & 2 courts.

As ever 3DR will provide prizes TBA.

This challenge is open to fixed wing and rotary entries. Take off and landings must happen within the 20 X 40m court.

Autonomous take off and landings will score higher but are not essential. The transit must be autonomous.

No doubt folks will find very light tennis balls but they should be at least 6.7cm wide. 

Honesty is key in the T3 and sillyness often brings points. This might be a great competition to try and fly with other DIYD members. I feel bonus points for every team in those groups coming on. A well documented attempt is also looked upon favorably. 

Lets make the closing date December 30th 2014. There should be enough spring and autumn weather for each hemisphere.

This idea is loosely based on the BMFA heavy lift challenge, it gets pretty serious.

Now bring on the questions, I am bound to have forgotten something.

There are plenty of cargo planes out there to build http://www.rcgroups.com/forums/showthread.php?t=1124466