TOROIDAL PROPS on a Drone - This is Huge!! 

Yeh that’s true!

Smart.

Waiting for a someone to try and cnc them instead. Seems like you could get a much smoother surface.

Also SLA is probably the best application for the smoothness.

Thanks man! Glad that you enjoyed it 🙌🏼 I really hope DJI tests it out at least and sees if it’s feasible!

Hahaha that's classic RU-vid for you 😂

They will be history soon like fidget spinners 😁

Yeah totally NoT an accident

​@@AlfieDoug I belive this propeller will last lest longer then fidget spinner

However high freq sound doesn't travel as far... I'd like to see a test at distance.

Thanks man! Much appreciated 🙌🏼

This is true! I think a longer travelled low sound still sounds better than a short travelling high pitch .

Have a speaker on the drone putting out the noise cancelling out of phase sound. Problem sorted. Anyone thought of this? The first two stories on BBC Click this week were about drones and then noise cancelling, so I put them together. Why aren't they noise cancelling wind turbines if they are too noisy?

@@ALucas73Then all energy ‘produced’ by the windmill would be lost in the noisecancelling process, don’t you think?

Fair enough! I've done that now 🙌🏼 That reasoning makes sense. Your designs are really good, so I was confused why it wasn't perfectly designed for the Avata. Yeh these were immensely difficult to print properly, but it made for a good test. Thanks for the design!

​@@LukeMaximoBell1 Oh, it's heinous to print, lower layer heights and wider widths can just about get it to work without using supports but it's still rough-as. For the longest time I didn't even get get to test my own designs since I was away from home so I just threw them out there for everyone else to try, so I'm happy and surprised quite a few people got it working, some even getting comparable performance to regular props, though with great effort in printing and finishing (sanding, buffing, etc). There's a going idea that resin printing is the way to go, but so far it's been difficult since a lot of resins actually need to be printed thicker than some of the FDM parts can be, so it's becoming a toss-up between low weight, thin yet rough FDM printing, or go thicker, heavier but much smoother with resin. Smoothness may be a big priority since a few of my commenters mentioned that they had up to a 40% loss in performance with a 3D-printed prop replica of a normally-injection moulded design, so it's no surprise you're not getting great performance either. Funnily, in my last video I did 3D-print my toroidal as well as a hex-blade standard prop to compare, and the toroidal beat-out the standard design by a lot. But both lost to real injection-moulded props by a lot as well, lol. If you're curious, you can check out the playlist of others doing their own testing, particularly @MoppelMat who did the buffing with a Dremel and got amazing performance on his 5" race drone. You're in the list now as well, of course 😉: ru-vid.com/group/PLYXuRA_sySbwa7FRot80kzEA_j4iqWQ_w Cheers for the tag and links, and have fun with the Avata - maybe one day someone will make real-deal injection-moulded toroidals once the complicated manufacturing (and performance optimisation) is worked out.

Agreed! Hoping DJI is researching this currently!

It’s a great channel. I love seeing innovation and out of the box projects. This channel is great for that.

Thanks man! Much appreciated 😎

I’m fairly certain there is no slipping on the axle. But I’ll wait for dji to make these injection moulded 😂

Thanks man 😎

Yeh you will never match a 3D print with injection moulding. Unless maybe you use Resin printing, but I don’t have 1 unfortunately.

@@LukeMaximoBell1 I would like to print it with ABS-like resin. Which of the props [edit:] Meaning which file [/edit] did you use for the Avata? And yes, I am aware of the risks....

@@VlastimirStankovic yeh that would be a much better option. Let us know how it goes. I used the 2.9 inch props.

@@LukeMaximoBell1 sorry, been in the move for the last two weeks and forgot to reply... The prints are too thin. So, the material breaks off easily at the "tips" and the middle section while removing the supports which in themselves are thicker. Would it make sense to thicken the profile a bit, especially around the "tip" section? I used Sunlu ABS-like resin next one will be printed with Nylon like...

Yes it should! Wait for DJI to create these!

Hahaha sorry! 😂 you can always sell it though!

That could be true. But they hit high enough RPM to hover at least! I think if they were designed properly they would be quieter overall.

@@LukeMaximoBell1 To me, it's similar to when I go from Gemfan Wind Dancer props to Gemfan Sbang props, the narrower chord and lighter weight on the Sbang props make them spool up quicker and achieve higher RPM, at the expense of some low end thrust. At hover the sbangs have a higher frequency whine (higher RPM/Less drag). The Sbang props are a bit more efficient in my loose testing, but there are a lot of variables of course. I am looking forward to test data from the molded Toroidal props in the works from Gemfan and HQ.

Thanks!

I haven't remade these props because they are so finnicky and shatter so easily.

I used PETG 🙌🏼

Hahaha agreed. That whine from the Avata is intense. I cringe when I hear it! Haha

Agreed 😞 I really hope version 2 is WAY quieter. It stops me from using the Avata quite a lot.

because wind turbines was never made to be of any real use, in a few years there are none left

Yes definitely! But I don’t own one 😭🙈

I saw Mark Rober’s video about it. That prop design is fascinating!

Yes! 😂

I’ll check it out!!

Search for Strikingfpv on thinginverse and you should find it!

That’s possible!

Hahahaha so true 😂

Yeh agreed! These are so hard to print 😂

You might be right! Let’s wait and see

Whoah that would be wild 😂 probably extremely expensive. Carbon fibre might be a more realistic option. Thanks so much and I’m glad you enjoyed it 🙌🏼

Maybe cast aluminum would be cheaper and easier. A crafty person could do that at home with a $130 smelting furnace on Amazon.

That would be quite a fun project! I would consider it 😂 but I think it is good if there is a bit of flex in the props. Just like how planes wings have to be flexible otherwise they will snap.

@@LukeMaximoBell1 I never claimed to be an aeronautical engineer. I’m just a Marine Corps vet and anything I say should be taken with a pound of salt haha. I saw a video a while back where props were made from an aluminum can so I guess anything is possible!

If you want to slice people's appendages off metal props would be perfect.

Hahaha why? Don’t know how I would have faked anything 🙈

@@LukeMaximoBell1 33% quieter??? And yet the readings are louder.... And you didn't thing I would notice the audio dip. You ducked the audio when the toroidal began to fly.

@@PetroniusPixel the 33% quieter was a bit of click bait 😂 but the audio levels are matched to what it sounded like.

Agreed. We’ll see what the big boys come out with!

Try using HQProp Duct-89MMX8 Cinewhoop 8-Blade Propeller they are much quieter than toroidals

Agreed! Injection moulded is the way. I don’t think it is patented? Is it?

Almost as hard as googling “MIT Toroidal Propeller” 😂

is it n times harder, where n is the number of people who have to google it themselves?

Hahahaha I know! I realised halfway through shooting that I was pronouncing it completely wrong 😂

I know 🙈🙈🙈 sorry!

@@LukeMaximoBell1 Hi Luke. Sorry for being rude while trying to be funny. You vid was very informative. Thanks

That’s how I started so maybe one day 🙌🏼

Agreed! But in a few years that will change!

Agreed!