New FPV video: “Ukraine”

2016 I got to join the Rotor Riot on a trip to Ukraine. The trip was truly amazing. The guys from UADR (Team Ukraine) were the best hosts you could wish for.

We got to go in to the exclusion zone in Chernobyl and visit the ghost town Pripyat that was evacuated during the nuclear melt down.
We had permission to fly wherever we wanted within the town and we all got great footage. It was amazing to explore this place and drink in the history and scale of this disaster.Continue Reading

Cool project from the forums; Ducted Mini Tricopter

Kevin_eric on the forums is on a mission; To increase performance and efficiency of his Mini Tricopter. He’s doing this by adding 3D printed ducts around the propellers.

His method goes a little like this; 1. Design/modify ducts 2. Test results 3. Evaluate results 4. Go back to 1.

After making 7 revisions of the 5 inch version, the design generates at least the same amount of extra thrust as the ducts weigh. Which is a very promising results.

To achieve better efficiency and more thrust he’s now moving to a 6 inch propeller setup.

But why on earth does ducts generate more thrust from the same power setup? Mainly 2 reasons. When a propeller spins around the airfoil on the propeller creates lift by generating low pressure on the top of the blade. Nature hating differentials the high pressure air on the bottom wants to flow to the top of the blade and equalise the system. This results in a spiral vortex forming at the tip of the blade which induces drag and ruining lift. By adding a shroud/duct with a very small clearance between the propeller and the duct wall the high pressure on the bottom can’t flow to the top which almost completely kills the vortex at the tip of the blade. The second reason for the additional lift is the lip of the duct. This is designed to have a soft edge that rolls over the and down the outside of the duct. In fact it’s shaped like an airfoil! The air being sucked into the propeller rushes past this aerofoil lip, which generates a low pressure zone just like a wing, which we know generates lift! Pretty clever stuff.

Be sure to check out his work in this thread for the 5″ version and this thread for the 6″ version.

Keep up the great work Eric!

What features do you value most in Betaflight?

Lauka the wizard is currently working on implementing the Triflight improvements to Betaflight 3.2. The problem is that Betaflight 3.2 is so jam packed with stuff that it’s filling up the space on F1 and F3 processors.

In order to fit the Triflight stuff something has to go! So make your voice heard! Vote on which features you feel you need from Betaflight right now! Link to the poll here.

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