the reasons why I DIDNT make it: Long Range Flight analysis!

[@Alin.Victor]

80c-100C ESC temperature at a constant 25-30A current draw for all 4 motors, is not normal.

[@nufanfpv]

I think you have to "rethink" your battery type/weight. 1600g it's a crazy weight for a 7inch drone. With mine MEGA7 i can reach 27km with 8000mAh(6s2P) Liion Molicel P42A (Handmade). Weight 900g, near 50% less than yours! If you want more capacity you can choose P45B(4500mAh) Molicel or newest(and expensive) P50B (5000mAh and same weight)!

[@TheRoamine74]

sweet spot batterie capacity and consumption is complicated to find, especially in high altitude when you need lot of power ! 27km total or just one way?

[@nufanfpv]

@@TheRoamine74 total flight. it was a a sort of benchmark

[@TheRoamine74]

@@nufanfpv Impressive. I have an old rekon 6 vista for long range, 17km is by best, it make want to change :)

[@Toth_Marton]

Maybe not. My record with 6s4p 16k mah is 18km. Out and back, 18+18km. It is doable with 4 battery setups on 7 inch. My absolute record with 6s 4p 4800mah cells is 20km out and 20km back. It landed around 3.3 volts.

[@nufanfpv]

@@Toth_Marton Hi Toth! sure, capacity/weight ratio is the most important value to research until the flight is reasonable smooth. Anyway awesome results! how many meters did you climb in this 2 flights?

[@themoggidriver]

First of all : Congrats to your 1000+ subscribers! So well deserved, man !!! This video with excellent footage and all your comments is an outstanding long range flight tutorial, thanks so much for your work. I can’t wait to see your next one 🤩. Best greetings, MOG 😎✊.

[@swissfpvshots]

Hello MOG, thank you very much for these kind words. I really appreciate them! best wishes back

[@kingjam6433]

Always good to analyse flights especially for long range, I lost a quad a few years ago before GPS rescue was more reliable in Betaflight. In regards to 2 blade props for me personally they work best on light quads but they also fly like rubbish with more wobbles when the tune is not ideal and the quad doesn't respond as well, some people swear by them but I think that's placebo. Definitely test them for yourself. Also I suggest if you take a direct flight to the summit then fly all the way down the valley, I've found my battery consumption is reduced by approximately 20-35% when descending depending on weather. Great work! Looking forward to more videos, your location is amazing!

[@swissfpvshots]

Thank you very much for your words. I will try the propellers. They have already been ordered ;) Straight to the summit and then back down the valley sounds reasonable...

[@diverFPV]

Use INAV's Altitude Hold function and try maintaining the speed between 70 and 80 Km/h

[@yamasaur]

Wow birds at the end were scary 😮

[@brammy05]

If your goal is only to hit 11km you could consider trying it at a place with much lower elevation. The air would be much denser which would improve your efficiency

[@LoveeSkatee]

guter Versuch. Das nächste mal den Winkel der O3 steiler stellen dann fliegst du automatisch schneller 😊

[@swissfpvshots]

Ja stimmt. Danke für den Tipp 👍

[@TheRoamine74]

nice video and analysis. Don't you think your battery is too heavy and you exceed the sweet spot Battery weight/consumption? With a 8000mah you could go way further i am sure. Your current drain is pretty high, in cruising style in altitude like this, it normally don't exceed 20A. Second idea: Hike closer to the summit before 😅

[@swissfpvshots]

hey, the batteries are definitely too heavy. But I just have these ;) I've already managed 20 km with one battery (without Gopro). Yes, I think 8000-10000 is the sweet spot... Haha of course I could walk closer to the summit, but the 11 km are my goal 😅

[@showdownz]

I have so much I want to say I will try to keep it sort but know in advance I will fail. First the reason 2 blade props are more efficient is because propellers are less efficient when cutting through turbulent air. It may not seem like it but with less blades the air has more time to settle between blades. At the atomic and molecular scale things happen very quick so while the it seems the blades are moving so fast it wouldn't mater to us humans, on the molecular level the extra time for the air to settle between blades does make a difference. Reducing weight will also improve this effect because what ever blades you use will rotate slower to keep the craft in the air if their is less weight. Weight reduction also increases efficiency because the slower a battery drains the more effective it is a delivering it's stored power. Less energy is converted into heat inside the battery and even the motors. Another thing you may try if you go to two blade props is to go up an inch in size. I have tried this trick on 3 to 3.5in, 5 to 6in, and 7 to 8in propellers. I even used a motor rated for 7in with 9in blades, but those motors were a little overkill for 7in to start with so this may not be typical for most 7in motors. That being said I'm sure you could go to 8in bi blade on standard 7in motors. The less blades means less weight to spin up for the motors and less resistance for the over all prop going through the air. You trade the extra blade for extra length on the remaining blades. You can test this by hovering the drone for a short time (15 seconds), landing and touching the motors, if it is fine then do the hover for longer (30 seconds, touch, then 1min, touch, then 5min). If all this goes well go out for a gentle flight, if that's fine do an aggressive flight. In 2 packs you will have safely tested if this will work with your motor prop combo. I have done this on at least 5 drones and never burnt a motor. The one inch up bi-blade trick has worked every time for me. I've never seen anyone else talk about this but I hope you try it and let me know. Regarding the analogy you did for throwing a ball. I would say it differently because your analogy didn't take into account the battery and how it factors in. I would say: Imagine that you have a drone in a hover. A hover is the most efficient a drone can be while flying but you aren't traveling anywhere. Now imagine you have tilted your drone forward as far as it can go without loosing altitude. This is the angle where your throttle is at full, your altitude isn't changing, and every once of additional thrust is moving you forward. Lets say that angle is a forward tilt of 70%. Now you know the limits of your drone, at one end you have total efficiency but no movement, and at the other end you have maximum movement but with the least efficiency. But why is the maximum movement the least efficient. Well because batteries discharge best when it's done slowly, and because higher speed is more resistance for the blades and aircraft as they push through the air. The trick is to find a balance point between maximum flight time and maximum movement. Air resistance increases exponentially so slower will always be more efficient for flight time. The air resistance scale is sorta fixed, it's just something you have to deal with but isn't something you have a lot of control over. What you can control is your battery efficiency. While it's true slower discharge is more efficient the real question is at what rate can your battery discharge comfortably. At what rate does your battery discharge with out generating excess heat. This is often reflected in the continuous discharge numbers in a batteries rating. Batteries with a higher continuous discharge have a chemical composition and internal design structure that does better at higher continuous discharge numbers. So they convert less energy to heat at higher discharge rates. This is where you will find your best efficiency to movement balance. The kilometer to mah scale is there to do the quick calculations allowing the pilot to think of other things. What you should keep in mind is it's just a guide. It doesn't actually know the composition of the battery you have on board. It's making some assumptions based on a standard battery and its losses under load. Knowing this can help you get a feel for what is going on rather than just trusting it like it actually knows your losses in flight. Reducing weight is a whole additional thing. But I will just say It's possibly the number one thing pilots undervalue. Cut grams. Oh and a well tuned quad with low vibration helps too. People underestimate the amount of power motors consume making micro corrections speeding up and slowing down trying to compensate for vibrations. Reducing these micro corrections is one of the main reason's camera drones (DJI) are able to stay in the air 30+ min. They are changing the motor rotation speeds so much less, and it really adds up. I've failed at being brief. The briefest comment I could have left was no comment. Or "cool video". Usually that's what I do Let me know if you found any of this interesting or helpful.

[@MattiaFrancioso]

cool comment

[@Anadrolus]

Thanks a ton, I learned a lot !! Very interesting.

[@chir00n]

Guter Flug! Ja den Wind darf man auch nicht unterschätzen. Grüsse aus der Region ZH

[@ddegn]

That was a lot of fun to watch. I'm working on a 10" build myself right now. I look forward to flying in some of the mountains here in Idaho. Thanks for adding the English text. Did you fix a typo in the title while I was watching the video or am I going insane? (It could be both.) Thanks for sharing this fun video.

[@swissfpvshots]

cool to hear, which frame? Yes I changed "made" to "make" in the title. You're not crazy;))

[@deroskar]

Diese Long-Range Analysen sind cool. Dein Stromverbrauch (also Ampere) ist ziemloch hoch. Durchschnittlich über 20. Ich hab ein ähnliches Setup. Einziger Unterschied 2807 Motoren statt 2809. Wie schon einige geschrieben haben sind 2x 6000mah lions echt am oberen Ende des Gewichts denke ich. Ich fliege 2x Molicell p42a 6s 4000mah und bin mit ca 900 gramm schon gut dabei. Damit komme ich ohne Gopro kaum über 10A. Mit 15A. Falcon rad sagt in einem Video über Eigenbau-Lions dass er eher Molicell 18650 p28a benuzen würde. Also 2800mah x2. Wäre sogar noch leichter. Binn gespannt auf deine nächsten Flüge!

[@alexfr890]

Herzlichen Glückwunsch nochmal zu den 1000 Abos. Hast du wirklich verdient mit deinen TOP Videos. Außerdem alles sehr gut erklärt. Mit meiner selbstgebauten LongRange Drohne brauche ich bei 60km/h ca.160 - 170mah/km, leider habe ich nur einen 6000mah Akku. Welchen verwendest du mit 12000mah?

[@swissfpvshots]

Hey, vielen Dank! Welchen Frame hattest du nochmals? Das ist echt ein niedriger Wert. Ich habe einfach 2× 6000mah akkus parallel angesteckt... 😅

[@BigKahunaFPV]

Wie immer ein erstklassiges Video von dir. Es macht auf jeden Fall Sinn sich das Video anzuschauen und die gemachten Fehler zu analysieren. Sehr gut finde ich dass du das hier so schön darstellst und auch mit uns teilst. Ich habe auch schon den ein oder anderen Fehler gemacht und im Nachhinein daraus gelernt. Das gehört gerade im long range Bereich dazu wo es auf viele Faktoren ankommt. Man kann alles richtig machen und der Wind macht einem einen Strich durch die Rechnung. Der Flug alleine ist schon spektakulär, ob du nun bis zum Gipfel gekommen bist oder nicht. Ich glaube dein Puls war auf 180 und du hast den Flug trotzdem richtig gefeiert!! Beste Grüße und wie immer allzeit guten Flug 🫡

[@swissfpvshots]

Hallo. Ja definitiv sollte man sich die OSD Aufnahmen anschauen! Man lernt nie aus bei Longrange ;) Vielen Dank für deine Worte und dir auch immer einen guten Flug… Liebe Grüsse

[@anotherview1]

Hab hier auf jedenfall was gelernt! Werde mir wohl den Verbrauch / Distanz auch auf's OSD holen und mal damit rumtesten, was meine optimale Geschwindigkeit ist

[@swissfpvshots]

Super, probier das mal aus 👍👍

[@strazfpv7043]

Battery is way to heavy for this task. It may be fine flying straight line but the quad looks underpowered when climbing. Try something like 8000mAh, should be enough, at least try to see how climb rate is affected by the weight. If you need to climb, use 3-blade prop... if just cruising or low elevation climb you can go for 2-blade for more efficiency.

[@SirCrypt666]

Good job! Waiting for your next attempt. Still thinking it's doable. Bi-blades shines with ultralight setups, or then used just for hovering.

[@swissfpvshots]

let's see ;) I'll try the blades...

[@vrj0]

Nice, wie bekommst du Sound + OSD? Haste OSD über die GoPro Aufnahmen gelegt? Oder separates Mikro?

[@vrj0]

Ahh okay, löst sich auf bei 1:20 ;)

[@vrj0]

Btw. du hast doppelte Vergangenheit im Titel. "I didnt MAKE it" heißt es :PPP *klugscheißer aber im Titel triggert mich das haha*

[@swissfpvshots]

​@@vrj0oh danke für den Hinweis. Habs geändert 😅

[@GramGrinst]

Schönes Video, trotz daß der Gipfel nicht erreicht wurde. Verrätst du, wie du das DJI OSD über das Gopro Footage gelegt hast? #### Nice video, despite not reaching the top. Can you tell us how you integrate the DJI OSD over the Gopro footage?

[@swissfpvshots]

Hallo, vielen Dank. Das sind eifach zwei Aufnahmen (1x OSD Aufzeichnung und einmal GoPro footage). Diese am Anfang übereinanderlegen. Dann kann man die GoPro Aufnahmen einblenden, über das OSD. Hoffe konnte dir Weiterhelfen sonst eifach nachfragen 👍👊

[@earthsgrip]

Some good lessons here. Are you running 7.5" props here? Are you tempted to try an 8" or larger build? I would have thought 25km total distance would be achievable with 8" 6S2P 21700, and certainly with 6S3P 21700. My 5" O3 copter can do 25km total with 4S1P, but without GoPro

[@swissfpvshots]

never tried it. But it would be interesting...

[@meotyda]

So do you have TWO 6000 battery's at parallel at the same flight? That's a lot of weight for 7 inch!!!!

[@meotyda]

Wow looks like it's true, you have 12 000 mah battery on a 7 inch. How much is weight of batterys, 1600 gram😮, plus gopro? I think that's too much for this type of drone, most of those additional 6000 mah are used just to keep this huge weight in the air. That's why you can't just increase the weight of fuel in the airplane, because you than need bigger wing and motors>more fuel>bigger motors>more fuel and so on. Try just one 6000 mah bat next time, what will be the distance for that?

[@meotyda]

Cheers from 🇺🇦✌️

[@swissfpvshots]

yes I know it is too heavy. But at the moment I only have these batteries...

[@swissfpvshots]

​@@meotydawith one I got 18-20 km. With both my record is 25km

[@florianricker1633]

Hast du wirklich 2 6000er liion gleichzeitig drauf gehabt, ich fliege mit.meinem.Moz 7 mit.einem 6000er Pack ca 12 Kilometer hin und zurück mit einem Höhenunterschied von gut 800m

[@swissfpvshots]

Wow, echt? Welchen Akku verwendest du? Auch der von GepRC? Ich habe max. 20km mit einem geschafft, mir etwa 1000 Höhenmeter

[@Sousadrone1]

Bacana