Should 8s Really be a Thing on 5in? Sequre 70a ESC and Fc Review

[@jeffdughman9741]

Those diamond cut pads for the motors are a great idea ! its going to make it much easier for new comers, itll help keep them from bridging the pads when solder on motors, these guys now what they are doing ❤❤❤❤

[@JevinW]

Yes you’re right, I wish I would’ve mentioned that!

[@DriftaholiC]

Increasing the voltage will decrease the amperage for the same amount of power so me thinks 8S is actually easier amp wise on the fetts. More voltage is certainly the future. On my 8S quad I initially couldn't use 16khz-byRPM but after tuning I ended up needing a lot less D gain then I would on 6S. Once the P/D was sorted I was able to use 16khz-byRPM. I didn't have to adjust ramp up power etc but I am running 1600KV 2207's.

[@suicidequad]

i run 48khz to 128khz. the "by rpm" setting lead to extreme motor heat on both 8s quads. no idea why, but ive seen other people have that issue.

[@JevinW]

Okay ya good tips 🤔 You haven’t had issues with by-rpm? That’s always haunted me in the past haha.

[@JevinW]

You know actually I’d be curious to see what your tune looks like, you mind sending it to me on IG or FB?

[@RepEvox]

This isn't quite true. You have to change the motors to reduce amps and reduce RPM. If you use the same motor and props, and spin it with more voltage, it will consume more current. If you reduce max power so that the RPM is the same as 6s, yes, it will consume less current, but the battery weighs more so usually this is a net negative on 5in.

[@taylorowen7558]

I have this stack running 8S with the RCINPOWER GTS V4 2207 1600KV on the Demibot Frame with 03 and love it !!!!!!!!

[@geordil]

50v or higher cap would be preferred for 8s. And those prop tips are probably getting to transonic speeds. 1860kv on 8s is like 61-62k rpm, 1300 ft/s + tip speed. I'd put a motor output limit (not throttle limit) on there to keep them closer to 50k theoretical max rpm. Like 81%

[@JevinW]

I think you’re onto something with the cap 🤔 and thanks for the math info 👍 I knew no throttle cap was gonna be too much but wanted to anyways 😂

[@geordil]

@@JevinW yeah lol you gotta try it XD. Remember you want motor output limit for this, not throttle cap.

[@JevinW]

@@geordilthat’s right gotcha 🤙

[@suicidequad]

i had better results with lower output limit (to about 1500kv) and higher pids versus higher limit and lower pids. but thats also a matter of build and taste. supernovas get super fucking hot while the xing motors dont at all at the same effective KV. chris rosser mentioned to me that the best performance is likely through using 2207 motors, but efficiency will suffer vs bigger natively lower KV motors. i can tell, flight time are garbage on my severely overpowered and quite heavy quad :D everything else is amazing. (i run 1300mah 8s on 4.9 inch, and even tried double lipos + 5.2inch, which tbh is awesome)

[@suicidequad]

@@JevinW i run a 65v 1000uf cap on one of my 8s builds and a 35v 650uf on my other. so far i cannot tell a difference. but yeah, using the bigger one is of course safer.

[@Robocopter_fpv]

You need Carbon Composite props to hold the power and it would be siiiick! Also if you ran an 85% scale cap on the throttle I think it would really shine.

[@JevinW]

I have a throttle cap on but I had to see what 100% was like 😂

[@suicidequad]

@@JevinW how was motor heat on 100%?

[@inCarsoNatedFPV]

So I’m flying 100% 8S now mostly because of the throttle control/consistency. Furthermore, utilizing Rosser’s advice, I throttle cap at 95%, start the curve at 0 and dip in the middle to 40% (scale).

[@genericfpv]

hypetrain people go to 3.5" sub 250 - jev goes to 8S SCREAMER 😁keep doing it dude! i think its pronounced squire like ye old world knights, the irons are really good had mine since i started

[@JevinW]

8s ftw 🙌 Thanks homie 🤙

[@arial_01]

Good review, was fun to watch the testing. Also more voltage more better, because its so much easier on the ESC and you can run thinner lighter cables as well, higher voltage systems are more efficient in most ways. The same move is happening in cars, all systems are rising in voltage (other than random little things like your dashboard or speakers, but the reason for that is that all those parts are designed for 5 or 12 volt, and it would cost too much money to redesign all the parts and rebuild the assembly lines. But things that get redesigned every car, like engines and batteries, are all being branded as "mild hybrid" by companies like BMW, but it really just means higher voltage systems that are more efficient. 12 volt is only the standard because a long long time ago, that was the cutting edge of tech, and since we standardized there we have just never moved on.) Anyway, you mentioned rotor riot rampage in the middle, does that mean you are going? YO I JUST NOTICED, wait sorry this is an edit but I saw a pair of HD800S on your desk, hello fellow audiophile! Didnt know we had that in common too, but thats awesome, I use a pair HD600, just love the Senheiser sound its so great.

[@JevinW]

Ya when it comes to software 8s voltage just isn’t standard for 5in at least yet. I do believe higher voltage has a purpose for larger drones but 6s really seems like the sweet spot for 5in imo. But ya man so there actually hd700s, not rich enough for hd800s haha. I was in a phase where I was like how good does premium quality headphones sound and next thing you know I had them haha. A bit much of treble but some software tweaking helped. But that’s dope you’re into that, was interested in the 600 series since they’re newer.

[@arial_01]

@@JevinW Gotcha that seems like a good take on 8s V 6s. For the headphones, yah 800s are so expensive, but i have been thinking about a second hand pair for a while. As for the 600s, they are considered the best for neutral balance mastering headphones, and have been that way since they came out. That being said, they are just the tinyist amount too little bass, and their imagine is not as good as 800s. That being said, their imaging is still quite good, and their base is still there for sure, its just very separate from the mids and highs (although not as much as an electrostatic headphone.) If your priority is raw sound quality and percisely reproducing the sound that was recorded by the microphone as closely as possible, then the HD600 is the only way to go. That being said, the HD6XX by Drop is about half the price and 90% of the performance, so look into those, you can find tons of reviews comparing the two of them. That being said, investing in a good amp and dac can make an even bigger difference if you are using a bad one right now; yah the audiophile rabbit hole is pretty deep.

[@JevinW]

Ya I already spend too damn much on drones, then again don’t we all lmao. But ya I believe it when it comes to sound quality, you’re really dishing out a premium for that 10%. But as for the 700s what do you think of them, are the 600s any better? Probably gonna be late to respond, at rampage rn and the signal is butt, haha

[@danielrenardson6231]

I think biblade props would be great on this quad since they're stronger, less thrust and more efficient at high rpm

[@butcher]

As I heard on full throttle it has a bit strange sounds, I had the same, It worth to add more capacitors on 8s, I have an octo 5" 8s, it's like 1sec to 220kmh~ I had to add two capacitors / esc to reduce the electrical noise enough, and removed this strange noise on full throttle. Btw neutron rc has a 8s 60A aio, I just ordered one, it will be crazy in a light frame :D Update: I see byrpm issue comments below, more caps solved that problem too. ( Actually, if you check car/boat esc-s they usually have 2-3-4 caps on it )

[@JevinW]

Thinking of swapping the cap to 50v and ya gonna take some advice from others on settings. But really a 60a aio? Idk 🤔

[@suicidequad]

thank you for sharing this info. i run an 65v 1000uf cap. is there any advantage to multiple ones instead?

[@inCarsoNatedFPV]

A cheap way to build 8S and still stay with premium electronics… 1. Foxeer’s newest 8S 55A esc for $36 2. HolyBro 8S Flight controller; F7 is $39 and their H7 with BT is $64. I’ve been running this above stack and it’s been working perfectly. Lastly, if for some reason you really want the 65A esc, hakrc makes it for $55 and it looks like the foxeers 65a twin.

[@ChrisQuadFPV]

I would be to destructive with 8s because im a speed freak 😁 No since in putting a throttle limit on a 8s, nice ripping,. I would like to see more .👍

[@JevinW]

Hy know the feeling 😅 Thank you and will do 👍

[@ChinwiSuh]

Thank you i couldn't download the video so I screen record it

[@TRITONFPV]

Dang that was crazy fast!!! 🔥

[@JevinW]

Ya scary fast 😂☠️

[@jeffdughman9741]

Xing2 2506 1500kv would be a killer set on this !

[@JevinW]

More of a niche thing but I just don’t like the 2506 stator size. Need some 2207 1500kv’s

[@JohnIn2SonAZ]

I have this stack coming from AddictiveRC in Tucson AZ.

[@MrBiggs-wu2kf]

How are you liking the stack? would you buy it again? i may get it.

[@noisy_boi_fpv_3920]

Awesome

[@nmxdavenn]

Built a clone of JB’s 8s build a while ago. Been pretty solid after probably 100 packs through it. Recently I think my bec is failing to the o3. Got one of the new foxxer 8s FC’s coming to replace the existing FC and voltage regulator. I really think 8s is great on a 5”. It’s not night and day, but it’s just all around better than an equivalent 6s.

[@JevinW]

I was curious if running a voltage regulator would help. Are you on stock pids?

[@nmxdavenn]

@@JevinW yea, stock pids, just with a motor limit. I guess it would come down to how the 8s FCs hold up. The voltage regulator is just another failure point. But so far I haven’t had any issues.

[@JevinW]

Ya for precautionary sake, but I gotcha

[@hendranandradrone7064]

Nice video thank for sharing 👍

[@DragonFlyMediaSV-kp8lu]

Does Bro have data on the top speed this configuration achieves?

[@JohnIn2SonAZ]

AddictiveRC will have the new AOS Red motors for 8S soon.

[@JevinW]

What kv? 🤔🤔

[@JohnIn2SonAZ]

@@JevinW 1570KV

[@SlickNick3]

That thing sounded wild lol 😂 do you plan on keeping it on 8s?

[@bradgibson1976]

Ive just built this stack out bro and im having same issues on fast rolls. any tuning advise to give please bro?. im running the aos supernova 1570kv 8s motors, sequre 70a f743 stack, elrs diversity, gps n compass, dji03. Thanks buddy

[@tylertrimble3184]

What frame you got? @bradgibson1976 running 50v caps? Curious how the caps fit

[@tinexdFPV]

Crazy machine^^

[@JevinW]

We trying :)

[@Nik_FPV621]

Hi Jev, I’m building going to build a quadmula siren f5 split mini. What are your specs. I’m only interested in the battery capacity, motor kv and size and prop Choice. I saw you are flying with an action 2 right? Love your style btw 😊

[@JevinW]

Thanks my man and awesome! I have a parts list in the description, ranging from drone specs to battery choice etc 👍

[@suicidequad]

@@JevinW btw how is the durability of the quadmula 5 split mini? it weighjts like half of my already very small piratframes shorty frame and i am happy with my 2.5inch quadmula frame. i was surprised to see you use gyro filters on your build. are those necessary for the quadmula frame or are they just precaution?

[@JevinW]

So the f5 mini is pretty good in terms of durability. The main weak point on it are the arms, which will eventually give out after 3-5 good wacks. But ya exactly the gyro filters are just precautionary

[@JohnIn2SonAZ]

That's awesome.

[@73FPV]

Stupid question, where did you put the receiver. I didn't see it. I like the 8 s build.. wow man. The mr30s are cool. Really cool video and edit.. good work. I subed up.

[@JevinW]

All good 👍 Appreciate it man! So in the thumbnail or at 3:57 I have it mounted in a grey 3d print

[@73FPV]

@@JevinW I put my receiver in the c lock area. Quadmula commented on how it should work well and be protected being in that spot. Its so clean . Im a big fan of Quadmula. You may like it there. I have a build vid on my channel , 2 actually, That shows it well. Short video. 73FPV is my channel ( Quadmula Siren F5 Split V2 Build 2024 ) is the title. .32 seconds in you can see it. Id love to know what you think. I havent had any problems with it there. Thanks for your time. 73

[@JevinW]

Ya dude Quadmula really has their shit down for frame design. At rampage rn but I added your video to a playlist 👍

[@73FPV]

@@JevinW Right on . Id love to be there. Next year. Enjoy. Party like its 1999

[@JoshDisher]

Not to be "that guy", but are you running 8s here without a pre-arm? I'm afraid... (Epic build)

[@taylorowen7558]

😂

[@dizzydeanfpv45]

8s sounds fun....

[@JevinW]

It’s in its intimacy phase but ya it’s dope

[@LehtusBphree2flyFPV]

Put a duel cap on that beast and some VCI motors with lower kv

[@JevinW]

So I’m gonna go with a 50v. 2 would be ideal, depends on the space available

[@LehtusBphree2flyFPV]

@@JevinW check quadmula 3D STL files for their double Cap print. That fits most frames and use shrink tubing on the legs to 16awg wire to battery pad. If you use a self-powed beeper, try designing a 3D part from the battery plugin and run it down to your buzzer pad and wrap the battery wires and beeper wires with braided tubing of your choice. I find it to be ideal on the battery plug cause most frames can't fit a self-powed buzzer in the frame so I compromise to put it where I can always disarm the buzzer a lot easier.

[@thirty3fpv]

8s seems perfect for 5.5 or 6 inch frames.

[@JevinW]

A 5.5 would be interesting 🤔

[@thirty3fpv]

@@JevinW with 2507 or 2408s. I run 2507 on my 5 in and its power for days.

[@hrisiliev3341]

try 27 or 31 motor timing and demag high

[@JevinW]

I why to do d-mah high but why a higher timing?

[@thisisbhm]

Lawd have mercy

[@changeagent228]

Have you had any issues with current sensing failing on 8s escs? I have had 3 from different brands all fail.

[@JevinW]

Interesting what esc’s are you using? I didn’t encounter that but I’ve only flown a single 8s pack on this bird.

[@changeagent228]

@@JevinW iFlight Blitz, 2x GEPRC Span Pro, HGLRC Zeus. On the GEPRC it was immediate and the others after many packs of lead thumb rippage lol.

[@JevinW]

@changeagent228 Interesting🤔 I’m gonna make a follow up video eventually and I’ll be sure to mention current sensing if that becomes a problem for this setup 👍

[@changeagent228]

@@JevinW 👍🏻 Btw loved the peak revs sound on your video. I tried some 2020kv wasps on 8s and got a similar sound until the 51466 props exploded. Over 50k rpm hehe. They got really hot quickly too. 😂

[@chrisbee5481]

First off your motors are way too high kv. On 8S and 5 inch it should be maximum 1600kv. Try motor output limit to 86 percent. You can also test these ESC settings: Demag compensation HIGH PWM low 24khz PWM high 48khz Motor timing 23 Got four 8S builds so far. All sizes 5 to 10 inch. Comparing the 5 inch 6s vs 8s back to back, the 8S doesn't really habe that much of an advantage to be honest. The amp draw is less than on the 6S and voltage sag is much less. Speed and acceleration is pretty similar. Only my 6S lipos get beaten so bad from the high current draw. The 8S lipos feel like power all the way though. But maybe 8S is only 10% better. Hard to say if you're not measuring racing lap times. Where 8S shines is on my bigger 7, 8 and 10 inch builds. These bigger 8S boys fly nearly 200kph top speed for a 7 or 8 inch. The acceleration is awesome.

[@chrisbee5481]

My 5" 8s used xnova 2208 1500kv motors. Maximum burst amp draw is like 115A. My compareable 5" 6s has 2208 1950kv and has 150A max. So if you do the math: 115A x 3,3V x 8S gives you 3036 Watt in total. 150A X 3V x 6S gives you 2700 Watt in total. So you can say they are pretty close with only about 10% less power. Only difference is the 6S lipos sag much lower on full throttle. Thats why I calculate 3V on 6S under voltage sag. 3.3V on 8S under voltag sag. Both my 5 inch I'm talking about here are racers. Top speed is pretty similar like 230 kmh on tri blade.

[@JevinW]

Duddeee this is really good info thank you 🙏 I knew the motor kv needs a throttle cap but I just had to see what 100% was like haha. Nah but seriously I’m gonna try those settings out, appreciate it

[@suicidequad]

i was thinking the same until i dialed the tune in. almost regretted going 8s for my 5 inches but now i love them. way faster than any 6s ive been flying. dynamic idle settings (around 25) and up to 128khz pwm made all the difference alongside just nailing that tune. can check my last video to see the speed. got better ever since.

[@that_jason_black]

Def reach out to Shawn(letsflyrc) if you haven't seen him yet at RRR