Can a Y6 do anything better? 

I remember when you taped up a quad to prove that the airflow in between the stack has an effect on performance. Now you're on a whole new level of innovation. It's insane that a passionate Dentist can do so much in his spare time. You and Chris Rosser working together is gonna shoot the hobby into the future

Some builds don't necessarily make sense, they're just too cool to pass up.

Nice to see an upload from ya Bob 💯🙏🏼👌

BOB IS BACK !!! I haven't flossed in months Bob...Hope to start again..

I would recommend you try, if you haven’t already, all twin blades again but with a higher pitch prop on the bottom. I believe that running the same pitch on the top and bottom of a coaxial setup could be the culprit of that “stuck in second gear” feeling you mentioned. The relative airspeed seen by the bottom props is higher than the top prop, and with the RPM of the stack locked, the bottom prop is not working as intended. Good luck with the development. I always enjoy see your experiments. You have more engineering sense than plenty of my actual engineer colleagues lol

Your flight comparison between quad and Y6 was super insightful and I'm so glad you took the time and effort to do this testing!

This was super interesting. I appreciate all the hard work and effort you give to the hobby.

Great to see you back !!

Thanks to your videos I passed my exam on aerodynamics: I used theories about prop size and pitch that I got from your videos and they got me through!

This was very interesting, as your videos usually are! Thanks for putting the time and effort in, Bob!

Great to see another vid from you, I love your insights into aerodynamics and just everything about drones 🙌

Great to see you putting out innovative content again!

Motors: fpvcycle.com/collections/motors 23mm Tall in 1860kv were used on the Y6, not available (yet maybe) Frames: bit.ly/3FgiIeN The flight controller: bit.ly/3HjXmPu That X4 frame at the end: bit.ly/3ncWjZC MUSIC The music came from one of our own in the industry and he's really good too: udachi.bandcamp.com/album/lost-in-time-2 One of the more useful research papers I used on coaxial setup inefficiencies: bit.ly/3FkZRiV Summary: The Y6 platform, when built to be as apples to apples as possible with an X4, will have a more solid 'footing' in the air, be able to maintain speed more efficiently and will have better control at speed. It's ability to maintain speed comes from it's ability to manage more load in general; it doesn't matter if that load comes from weight or moving quickly, load is load and it's got more props and motors. Conclusion: The Y6 and really anything with more motors/rotors will not have as high of a top speed and have worse 'throwability'/no throttle aero properties. All in all, the platform is useful for filming at speeds and very fun to fly but a bit more complicated than necessary to regularly fly for fun. Stay tuned to www.FPVCycle.com. We've been working extremely hard on a bunch of new things. ▼Join the FB group for more discussion: FPVCycle - Kabab FPV facebook.com/groups/379155946182689/ ▼ Tips? Patreon: bit.ly/2oGLP9b $1/mo from 1/4 of my subscribers will make me quit my job. Thank you -PayPal: www.paypal.me/kababfpv -Bitcoin: 1E4XZXoD4rS6MYWVWuenY7Kw2M1YgyNpoQ -Nano: xrb_1188ek5bd7tb9kw67asnp9o65byuoaxbtpxuznx1ribf75x78awywmakj55f -ETH: 0xD067F93811f2eC31CB1928901002dfdf9A492EF5 -LTC: La2KWYAjp4VT2Lq2M76pbjzXWvRyjpfCtG

Cutting edge, Wow so glad to see people in the hobby are pushing new ideas foward, Great vid Thanks!!!!

Can I just say that quad frame looks so good. Here comes the Y6 craze haha, please post more Bob I love your videos.

WELCOME BACK!!! been busy! first video in nearly 6 month!

Fantastic comeback, this a pretty thought provoking.

Glad to see you back, Bob. There are so many dynamic components to the Y-6. Motor stagger, prop blade counts, oh my. But it seems that it fills a need...which is good!

Welcome back, that new drone goes like crazy

I am happy to hear that you are ok and I love the flight footage. I am so spoiled now.

Now I'm very curious about Y6 7" (or 7.5" as you said) for long range flights. Because if this Y6 efficiency gain carries over to normal speeds, then we could get some impressive new LiIon multirotor LR distances. Still not like a wing, but more than we have now and maintain the tricks a multirotor can do.

nice work dude I actually browsed your channel after also taking some time away from the hobby. so it was nice to stumble upon a new video from you in which you did not disappoint. I really like how you're always looking to improve things in the hobby and bring a lot of real world testing into the mix. cheers bud. also I only floss a couple of times a week but luckily im blessed in that I've never had a cavity in my 30 years of being alive and my gf is a hygienist so I hear it enough from her :)

Yes! Love it. Glad your back.

Great to see you back! That Y6 looks like something that would work well for my remote control plane chasing. I have a hard time keeping up with the faster planes.

Very interessting topic. Thanks for all the work you put in.

Been playing with this idea for high-wind setups, since i fly alot over the sea and done some kite/wind surfing chases in high wind. Nice to see some in-depth info!

Years ago I built a 10" folding Y6 as a camera platform, I loved how that flew, but couldn't really go crazy when flying it, so I built a similar style folding 5" Y6 as a toy to chuck about when I had time, but would still pack away into a tiny space (Car glove box) when not in use. It was a simple design I thought up that just had a pair of triangular (Well..... More like "Elongated hexagons" TBH) carbon plates to sandwich the stubby 10mm alloy box section arms, with an oblong top plate mounted on rubber standoff to hold the flight/FPV electronics and an action cam. It was pretty robust, not excessively heavy, and it was easy to build without having to go to the expense of getting the plates CNCed or laser cut. It wasn't particularly powerful by todays standards (only 6X 2204's on a 3S), but it flew really beautifully, and had the most predictable flight characteristics of anything I'd built before or since. It was outstanding for those days where the weather was great, and you just got the urge to take a detour on your way home from work and find somewhere to run a couple packs through it. Unfortunately, I managed to crash it hard one day (Didn't QUITE clear the top bar of a chain link fence while going flat out. :( ), destroying the frame and one of the motors. This was after the UK had just started getting REALLY "Anti drone", and I'd already had a few heated encounters with over opinionated "Karens", so I put off rebuilding it. Then drone/pilot registration came in, and I just decided to ground my RC toys until I could see where all this new legislation was heading........ I haven't seen any improvements in the public/government attitude towards us yet, so I'm still not (Officially) back in the air. :( Once the government prompts the mindless public to become outraged by some other harmless hobby, and this takes the heat off RC pilots, I'll have to see if there's a route to "Grandfather" all my old kit back into legal use, and THEN will be the time to "Rebuild" my old freestyle Y6....... Maybe as pocket sized 3" this time? :)

Best day ever in the midwest is when it snows and Kabab posts a new vid

Wait. What? A new video? Man you make that spot look awesome unlike me when I fly at the same spot. The Apollo field looks different too. Gonna have to go and check it out 👊🏻

Love what yah do Bobby!

omg,,,finally new video,,,i've been waiting news video on this good channel,,,tq sir

Glad your getting to fly again

This is awesome brother. Great info 👍

That intro was 🔥

Pretty impressive... flying machine, Bob! 😃 Fantastic work! And fantastic flying!!! Yeah, the prices are terrible right now... I really hope they come back to a more reasonable level... Anyway, stay safe there with your family! 🖖😊

Man i kant wait to fly like that...badass bro keep up the kool videos

I don't know how I came across this video, but I'm glad I did! You did a great job explaining all your experimentation, and I love your approach to trying something "not normal" in the FPV realm because of the possible potential benefits. I'm not surprised you wound up with twins on top and tris on the bottom, as others have pointed out the incoming-airflow difference from top to bottom. I believe others have also suggested twins everywhere and higher pitch on the bottom. Definitely worth looking at for comparison to what you have. Another suggestion if possible: Reverse the stagger you have now. Put the top motors BEHIND the bottom motors, so that when at-speed (craft tilted forward) the bottom blades have a 'better' chance at seeing more 'clean' air. Might improve efficiency, thrust, etc, might not. Just thought it's a possible variable to try. You have the beginnings of a new configuration, and I think you're only at the tip of the iceberg. I think you've got a lot more optimizing to squeeze out of this platform, but I also think it could surprise you even more. Great work!

I love the Y6 i like how it turns!! 💜

It looks sooo freking cool

Nice setup. Always a pleasure to hear your opinion. Your rants are meaningful, particularly motor design and concept.. I’m on the hunt to learn more about motors and how to create a low torque low rpm motor. Tmotor -sells 1 for $2k it can lift 100kg. In time. I await your videos to come.

welcome back :)

Keep Pushing!!!

Looks pretty cool and fun 😎

Man that Y flies nice!...Thanks Bob for the 411...

Great to have you back! What's your thoughts on a traditional layout 5" hex?

I've been building (larger) Y6 on custom frames for a few years now, for no other reason than that they're neat looking & people always want to chat about what it is! :3

The ability to hold a high rate of speed that you seek in a quad form factor… 7” and up feels that way for me. I just love the way they cover ground. The 7” Y6 will be a sight to see. I’d build one of those just to haul ass from time to time.

I made one my of source ones into a y4 thru the week I posted it up on the TBS lounge I had 2507 1200kv motors 7inch props it was ok lacked thrust I got over it and turned it back into a quad again but I've mounted the motors underneath the arms and made it a pusher quad

What I was wondering, they look cool

the sound is much cooler ;) nice to see a video again if anything, i might have expected tri blade on top with twin blade higher pitch same load on the bottom same load balances yaw and higher pitch on bottom helps with generating thrust in already sped up air

Didn’t even start the video and like immediately!

This was great video, love the concept and innovation. It seems intuitively that the two extra motors are adding to the firm feel in the air by adding physical gyroscopic forces into the frame? (As in how a gyro can balance at any angle on the end of a string) Just my observation as I listened to how you described the flight feel.

thank god, Kabap is alive

Really enjoy the experimenting you do. These kinds of videos always get me thinking, so here are some of my thoughts: I think efficiency is very important for speed because higher efficiency means more power is turned into thrust (increasing speed) instead of being wasted, thus lowering the demands on the battery (which tends to be the performance bottleneck). I've found triblades to generally have worse top speed (especially with larger prop sizes like 6 inch), which makes sense because fewer blades is generally more efficient. However, it helps to go up in prop size when moving from triblades to twin blades to make up for the loss of blade area. Lack of blade area is probably why the Y6 flew poorly on 5 inch twin blades. I think twin blades with larger diameter and/or higher pitch would fix that and improve speed compared to the hybrid setup you arrived at in the video. It is surprising to me that you got better flight times with the Y6. I would have thought that the inefficiencies of the coaxial motors would have caused worse flight times. My hypotheses on how the coaxial motor inefficiencies were offset: - Lower drag due to fewer arms - Higher efficiency of the one set of twin blades - Props didn't have to spin as fast since there was lower blade loading compared to the X4. Props produce thrust more efficiently at lower rpm. As you said, more motors/rotors will generally have worse top speed. I think a traditional tricopter with twin blades would be faster than the Y6 or X4. Less drag due to fewer arms, no coaxial motor efficiency loss, and the improved efficiency of twin blades. But then you are dealing with the added complexity of a tilting motor.

muy pero que muy bueno tio !!!! ole ole y ole!!!

Y4: someone wrote about a Y4 - seems an interesting approach dealing with your weight imbalance. Why not have 2 strong single motors in front and a weaker coaxial pair in the back. And that combined with higher pitch on the back bottom prop because it gets already accelerated air. What impact could a shorter or longer back leg have?

Very interesting!

Long time no see. Glad to see you are still playing around with weirdness

Hope to see another upload soon.Miss your videos

Yaaaay Bob's back

Hell yeah brother!

What I learned from this video - how to do two stack build in MacGyver-ish way :D Cool moves AF.

Loved it and we all need breaks. Enjoy yours.. 💙🤟🤟👊👊🕺🏼🕺🏼 Mikey

Bob, have you ever looked into brushless geared quads? I've been doing some testing lately and I'm having some pretty incredible results in both flight time and lack of noise.

good job 🎥🔥🕹

Hey, Mate! I have built a TP3 and am very happy with it. Having fallen in love with FPV, i now am looking for a fullsized Freestyle Build for Bando Freestyling as well as some mountain diving with a Hero 7 and bigger. (Very broad usecase) After having taken a look at the top of the line frames, i am split between the Prototype 5 and the AOS 5.5 by Chris Rosser. What is your take on Durability on both of those Frames? The Devil Horn Motor Protectors are a must have for me and the 5.5" Props on the AOS seem like a great way to maximize Flight time, without losing the 5" Power, and the cross-strut Arm Design, seems as if it does handle crashes well. On both of these Frames i have not been able to find info on how they crash. Do you have experience with both of those frames, and can compare them, since you and Chris are working together? Keep the great work up, the TP3 was a great entry to the hobby! Greetings from Germany

Просто шикарное видео! Автор ролика очень хорошо всё объяснил и показал. Отличная работа! Я как раз собираю 2 Y6 (980 и 680),уже пробую, но ты летаешь как Бог! А я так,учусь. Спасибо большое и всего хорошего бро!

Cool project, could you help me with building such a Y6? Did you use Betaflight or what did you use?

Is this y6 frame available? I can’t see it on your store. I’m looking for my next build, and this looks interesting. Cheers again.

you should try it with separated rear motors. Meaning, two coaxial pairs in front and two separate motors in the back (I like to call it XY6). I tried this when I was messing around with hexacopters a couple of years back. It made a massive improvement to the flight characteristics and control authority as well as increased efficiency.

I would love to see how much difference perfect CF aerodyamic covers over everything make on speed and efficiency. Especially teardrop profile arms.. lots of work but, no one seems to be trying this.

ok now watching you land on the log... I gotta try this.. 2 of the split arm quad and 2 Y's please :)

Y6 is my favourite build type. Currently flying my 7yr old builds.. they fly like a plane, can do rudder turns and swing that tail around, so much fun. I would never build x4 again.

Haven't finished the video but already want this Y frame. You planning on selling the frame or possibly sell or a Kit like Ummagawd has for the 3Fiddy?

0:55 What is this capacitor board? It's really cool, does it replace a bigger capacitor like a 1000mF 35V? If it does it could enable some frames to fit the capacitor inside the frame instead of in the battery lead, like in the Fouride.

My favorite kawd of all time... the Flynoceros Ratkawd! By far not my lightest 5"err but coolest nodoubt

I couldn't quite follow, but at 10:53 you started mentioning the props you're running. From what I could understand, your final setup is 5226-2 on top and 5226-3 on bottom?

so curious now as I just finished an event where I tried (and failed horribly) to chase stock cars on a nascar track. Ive got multiple more of these races coming up next year to film so this y6 is intetesting. What would you reccomend for maintaining the highest possible speed for the longest amount of time? especially in very dirty air from the wake of these cars

I love your videos but if it means you have been taking that time to develop products even better!

This must be one of the first FPV related videos I have seen that has some good music :) could you tell me the name of the track at 19.38?

whaaaaa that thing is cooool man!

This video kind of hurt my brain lol, but it was super interesting!

Hi! I apologize for my English earlier, as I communicate with you through a translator. I hope you will understand me. :D I noticed that in your quadrocopter assembly, you take out a capacitor on wires at a distance from the speed controller. In this assembly, I noticed that you also carried the PBF Rush FPV on wires at a distance from the motor controller. Tell me is it possible to do this? Is the efficiency decreasing? I ask because it is not always possible to solder the capacitor and PFB Rush FPV directly to the speed controller, and many of my friends say that it is absolutely impossible to do this since the effectiveness of such a solution is significantly reduced.

I like it I can't belive it flew that good with a loose board honestly

I would love to see biblades on top and higher pitch biblades on the bottom that can squeeze out some thrust from the turbulent air. Steep biblades should theoretically help with speed and efficiency but your Y6 setup is already surprisingly good in this regard.

I looked yesterday on the website, but couldnt find the frame. I would love to try this frame with the set of 2506 motors I got. Was going to put them on a glide, but since it's gonna be a dji quad, I was super interested in this frame. Are they still somewhere on the site?

Thoughts on a Y6 Cinewhoop? could save some weight by only needing 3 ducts + possibly greater efficiency?

I hope this frame becomes available i love y6 designs

The speed helps get clean air to the bottom props helping with efficiency.

When you goto the 7+ inch range... Maybe make use of the 4:1 that are rated for 8s now? Having the option to run to 8s may help those top speeds substantially if the 7inch props can hang together. Still hoping to take my 10inch on 640kv 3115 build to 8s eventually but I am focusing on a car project right now rather than FPV.

HI MATE, im from the uk and have burnt out 2 escs on 2 crux 3 2s quads in wet grass can you recommend an aio board with motor plugs please?

+KababFPV what are your thoughts on the "Axial flux motors - The new hope" used in this hobby?

24:14 Never feel pressured by us Bob, we love you no matter what :)

I had similar thoughts when I saw rotor riots Y4 setup and immediately thought of a Y6. I challenge you to fly the exact same components as a flat6 or even trade the gained efficiency from losing coaxial into lighter lower pitch props or going back down a stator size. I feel like the speed improvement was really from the added disk area. My other thought was more along the lines of comparing 4x5.1" vs 6x4.2" props or similar. Keeping relatively the same disk area but reducing the amount of prop weight to stator volume giving a more responsive feel.

Great to see you again! :) One question: the center of mass is in the middle on this y6? Because it seems that the front arms are way back then it should, it seems front heavy. On my y6 I used bottom mounted battery so there is no problem with the landing, and the center of mass is exactly in middle. Another thing that I've experienced with coaxial (y6, x8) setups that they are better with high pitched blades for me ( related to the top speed ), but of course less effective.

some time ago I had an interesting idea: mount the front Motors of your craft underneath the arms. I tried it out on an experimental setup and the drone was very fast, but I am not sure, weather that had to do with the setup or the fact that those were 6 inch Props on 2207 2400kv motors on 4s. Would love to see a more repeatable test of the concept of having the front motors upside down on a normal frame (so that they don't interfere with the rear motors as much in forward flight).

2:21 how does a tpu mount with that small of a connection to the frame not create bobbles in the footage

Other quad, but I feel as if asking under the most recent video is best: I think of getting myself a light 5“ quad, probably the TOOTHFAIRY2, eventually the FOURIDE. But I am not sure on the motor-choise. In the past you used often your (now outdated) 2203 Motors. Now there are the the 21mm and the 23mm-shorts on the market and I am not sure which to choose. In the Toothfairy article you write: as light as possible, that steers me towards the 21mm ones. But on the other hand, the 23mm-shorts are the successor of your old 2203, so thats the original motor you opted for. Any recomendation? Kv is fairly similar at 2300kv, weight seems to me arround 5g per motor, makes 20g in total. As a sidenote: I have 2X4s 850mAh, 2x4s 1000mAh and a loot of 4s 1500mAh. Do you think the 21mm could rarely also handle the 165g 1500mAh lipos (not ideal, but as a „if nothing else is availible“)? Or would you go for the 23mm when I think about sth like that? I dont want the quad to be super punchy, for that I have my races. Rather I want it to be a SILENT and smooth park cruiser. Weight without battery should be arround 180g-220g, with a battery between 85g and 120g (850-4s & 1000-4s), with eventually some rare times the 170g(4s-1500). Thx ;^D

Y6 flight looked like it was on rails, very controlled. I tend to the more "flingy" type of flight, but chasing is fun. I hope this platform goes on to be the go to choice that kind of high speed filming.

HYPE!