Main Rotor Blades EXPERIMENTAL HELICOPTER BUILD SERIES (Part 60)

Building the Main Rotor Blades for my ultralight homebuild helicopter.
This is part 60 of the EXPERIMENTAL HELICOPTER BUILD SERIES.
00:00 Disclaimer
00:02 Intro
00:25 Tube Assembly
11:27 Blade Skin
15:01 Bonding Tube Assembly and Blade Skin
22:01 Endcaps
22:52 Blade Seats
25:20 Blade Center of Mass
25:55 Cleaning Blade Skin
26:31 Root Reinforcement Tubes +Plates
30:27 Test-Fit Blade to Main Rotor Head
31:35 Blade Decal Stripes
34:01 Remove Parts from Blade for Cleaning
36:18 Final Blade Assembly
39:06 Overview / Outro
Kanalmitglied werden und exklusive Vorteile erhalten:
/ @ultralighthelicopter

[@ultralighthelicopter]

Here you can see how i Install the Blades and Support my Channel: kzbin.info/www/bejne/nKDYd4ufr7mLgJI

[@alexaltrichter1597]

I've watched all your videos, some twice. This one of you fabricating the rotor blades is the most interesting. Thanks for sharing your expertise.

[@user-ss2hq9zx6t]

أعتقد أن الوزن أكثر من الزوم ولكن عمل رائع 😎

[@expsgeorge]

Thanks because you share your skills with the rest of us.

[@jayatissapeiris6781]

Sir. you are doing these well. Perfect tutorial for us to learn & very nice & complete workshop.. god bless you!!!!!!!!.

[@josephkipchumba7759]

Very strong rotor blades without rivets ❤️

[@jukkatakamaa7274]

I wonder.

[@UbatSusa-yc1zc]

very fancy rotor fit for that Nigerian built helecopter.😊

[@Waveluth]

Those black bolts you put together really should be dipped in Loctite before torquing them down✌️🇺🇸

[@jcmaosaobra2791]

Parabéns estou espiando desde o início apreensivo por ver voando essa sua máquina, muito capricho serviço de primeira 👌

[@nilsdietrich5563]

Would be nice if you had access to some cnc mill for mounts and profile pieces. Your fabrication skills are great.

[@ronaldjtriumph5985]

I must say, your systematic approach to this is to be admired ... well done Sir!!!

[@ultralighthelicopter]

Thanks Sir. I will make this helicopter Great.

[@elizeusilvabezerra4767]

Muito Bom, ver um trabalho de precisão e de grande abilidades nas mãos de profissionais como você ,parabéns pelo capricho.

[@kevinmorrison1553]

There is such thing as a Machinist level for the blade grip area. They are much more precise than a Carpenter’s level. I’m surprised caulk is used instead of fiberglass resin and micro balloons. Very nice though. I’m a RC heli person. Building blades is very difficult even on a small scale. I admire your drive!

[@hmidoud1]

is it normal that the blades are made of metal? does not it make it heavier?

[@Ngnkg]

احسنت ايها المبدع تستحق ان لا نضيع اي ثانية من فيديوهاتك

[@ColinWatters]

I think you should taper the root reinforcement. If its going to fail it will fail where the root reinforcement ends.

[@dannydetonator]

If they calculated and/or simulated loads and correct materials, this shouldn't fail. 20 screws and less stresspoints and more unbroken lines keep the moving parts stronger. Actually 22 specialised screws, looks overengineeredThis is also composite and looks very well worked out.

[@pauldatche8410]

This should be good. It is quite over engineered given the intended load.

[@larbak666]

Muito show de técnica e paciência

[@saeidmoini1906]

AWESOME… now I know how it’s done…. Thank you 🙏👍

[@williampihahuna195]

Waouh ! I was asking to my self, how are you going to build the rotors blades , this is the most difficult part, especially the weight of each blade they should be the same , to avoid nasty vibrations . Show us your first test flight . Tumb up x2 Budy see you on your next test flight.

[@dang25272549]

A lot more details to do than making a fixed wings . Thans for sharing this incredible work ❤

[@yerpisumbugajakalimandang778]

Ini baru pe you tobe yang bagus tidak ada tipu tipu saya suka ikuti kalau saja ada di indonesia sya pasti suda pergi kursus dan kalau bisa saya akan minta kerja samanaya dan saya pasti belajar.

[@jorgemacias6736]

Magnífico trabajo 👍

[@CameronCarter1]

Wow, that is fantastic. I wish I'd seen you do this 10 years ago.

[@jnewbytrader370]

Awesome work! very impressive! need some of these for my Brantly B-2B

[@halilinusi]

Saya sudah lihat semua proses dari episod 1 hingga 60 dan saya tidak sabar untuk lihat awak terbangkan nya..baru tahu susah nya membuat helikopter,semua nya harus ikut buku manual..saya yakin dengan helikopter buatan awak berbanding orang lain yang cuba membuat helikopter tanpa ada pengetahuan dan panduan buku manual,hanya membuat ikut apa yang di lihat..kita bermain dengan nyawa..saya lihat di youtube pun tidak yakin ia boleh terbang,bagaimana perasaan jurupandu😂😂~malaysia boy🇲🇾

[@ultralighthelicopter]

Terima kasih kerana berminat dengan video saya. Silangkan jari anda untuk penerbangan pertama saya. Selamat sejahtera...

[@opmcentrales5174]

Un trabajo espectacular👏👏👏

[@eiichishiraishi9911]

良いナー、うらやましい。

[@SpeedFireARL]

вот это да! мужик Фурию собирает лопасти конечно интересно сделаны

[@dietterflieller5003]

Exelente trabajo muchas gracias

[@Ben-Dixey]

Superb video and job building the blades, very interesting and thanks for sharing it. Where did the blades balance in the chord-wise direction ? How close was the weight of each blade to each other? Not sure what adhesive you are using but I had an adhesive failure because I didn't etch prime or acid treat the aluminium. I was using 3M 2216 B/A adhesive, very expensive stuff but I didn't do a test sample. I suspect what you have done will be fine but you could add some trailing edge rivets just to be sure. Laminar flow separates way before the trialing edge so they won't make a difference to blade efficiency. Regards Ben

[@ultralighthelicopter]

Thanks Ben. The chord-wise balance is close to 25% from leading edge. I had to replace some steel tubes (as requested in the plans) with aluminum tubes at the back side of the blade to get the chord-wise center of gravity more forward to the leading edge. Had planned to use rivets you can see the bore markings here: 21:57 but after bonding the blade the adhesive seems holding the trailing edges super strong so i wait with riveting and keep a eye on it how it will hold up after the first spin ups... I weighted the blades, they both show the same weight but my scale is only to 0.1kg exact... Cheers

[@Ben-Dixey]

@@ultralighthelicoptersounds good to me 👍 if you do have any trouble with higher than expected collective forces then you can always add springs to the mechanism, many helicopters have springs on the collective when the blades chord mass isn't perfect. Look forward to seeing some blade spinning. That's when the fun really starts.

[@juancarloscasabuono6651]

@@Ben-Dixey The CH-4 original had the towers with bob weights on the rotor head, like the Bell 47, to compensate that.

[@Ben-Dixey]

@@juancarloscasabuono6651 Thanks, I had forgotten about the weights on the blade grips option. Wonder which is considered the better option, weight vs reliability I suppose. Of course the best solution is to get the mass distribution right.

[@user-jg5]

Rotor blades How long is one blade?

[@plainnpretty]

I loved the freehand counter sinking . great video Thanks

[@simonalbertocalderonflores854]

que hermosas palas muy profecionales amigo me enceñarias hacerlas tengo un proyecto hacer un helicop hace años y por las palas que no sabia como son estoy frenado

[@richardbadish6990]

Well, now im afraid to fly in a helicopter now! Never in a million years, would i have guessed the blade were made like this. Sketchy, and slightly brilliant! Youd think the centrifugal force, would cause the insides to fly out. I guess thats also why theres so many bolts on the mount end. Still neat to watch!

[@JosephDent-qd9ih]

Bring back memories of Dr.Shoemaker shop Detroit Michigan , Mc cellan & Shoemaker. 1970-1975.

[@shanakaliyanage6875]

Simply wow!! This is one of the best build videos with so much detail. Welcome back!! ❤❤

[@davemunday2652]

It's a treat to watch you work

[@shakeydavesr]

This video came up in my feed somehow, but all hail the algorithm for it,,, I’ve watched a few a have a number of questions, but will wait until I get through the series as I’m sure it’ll become clearer. But you, my friend, are a madman,,, lol ;) I wish you the best on this journey, you appear to have a handle on it and know what you’re doing. Unfortunately, so many people through the magic of video editing and KZbin, may appear and come off as an engineer, far too many have earned their degree’s from the University of KZbin. I myself am not an engineer, though I play one on TV,,, (or YT),,,, ;) Tho through my 30 years of fabrication I have learned a thing or two and can speak confidently on a few things. Again, I haven’t made it far in the series yet, but did you have to address any heat-treating issues after welding any of the aluminum? With all your bell cranks pivoting on threaded / partially threaded stainless (it appears) fasteners, I would think that bushings of some sort would be appropriate? Some, from what I could see, are pivoting on the shank, but some appear to be riding on the threads, and with the constant cycling and vibrations,it would seem a bit safer a long wearing. Yet again, I’m no one but a stranger from the internet making an observation and offering you a well deserved "Atta’ Boy".

[@ultralighthelicopter]

Thank you :-)

[@Alex-Pilot]

Отличная работа !

[@bobbean4702]

Beyond my skill and endurance level. A&P and Commercial Rotorcraft. Mucho admiration.

[@rockyrivermushrooms529]

Ive been waiting for this specific video! where did you figure out how to engineer rotor blades?

[@locodefra]

Al fin alguien muestra como hacer los rotores, muchas gracias, me aclaro muchas dudas para hacer los míos.

[@muhammadkamran851]

Dear sir it's very beautiful work but the ss sheet skin on the tubing assembly fitted only with pu foam?

[@mdu6]

The one suggestion that comes to mind is that you should have made a 3 blade and use it for load and stress tests.

[@dodafarias9753]

Da hora inteligentíssimo parabéns

[@thewolf3530]

Vary Wil done great work and smart 🧠 🧠 man

[@TheHarryMann]

Very novel construction. Great workmanship. I am though surprised that the trailing edge skins are not mechanically fastened, relying on adhesive only, but being a free-edge and prone to flutter, at leat a rivet at the tip, and a few other radial places? The root of course is dealt with by the incidence control plate.

[@charleschumbe5708]

I noted that too.

[@josefaustino3746]

Boa tarde Amigo, esse é um processo de fabricação no qual eu sempre quis ver como é confeccionado. Sou de Campo Grande - Rio de Janeiro. Parabéns.

[@dietterflieller5003]

Campo grande ou rio de janeiro?

[@reylova]

Hand safety is important. Good Job...

[@Ideiasepensamentos]

Bom diaa ..!!! Baaa tchê vc eo cara parabéns por vc compartilhar seu conhecimento abraço RIO GRANDE DO SUL BRASIL ...!!

[@wernerpfeifer]

Had I not thought that rotor blades are so massive and heavy, rather carbon fiber and epoxy.

[@Imagineering100]

Heavy blades give better autorotation.

[@russella7263]

Better to use tip weights as inertia is a function of weight and speed. There’s not much speed at the root end of the blade. There are many areas of this helicopter where modern composites would provide superior strength, lightness, durability, or fatigue life. The rotor blades are just one of them. But it’s still a pleasure to watch it being built.

[@pauldatche8410]

​@@russella7263are you implying that you can build the entire blade out of carbon fibre and resin without the stainless steel ribs? Would that be strong enough? Wouldn't that be too brittle?

[@jusieresaugusto2502]

Fantástico duas séries do rotor tô vendo assistindo desde o começo vou ver se consigo fazer desse mesmo jeito que eu tô fazendo a minha meu helicóptero mosquito tem que ser desse jeito porque senão não vai dar certo Muito obrigado

[@user-wn5jt5yf9z]

Will also be interested in the tapes as well.

[@gimayer9511]

amazing,man. I m from china,when i watch you video.I get shocked.I want to learn some experice from your video thanks

[@lo2740]

good good study, day day up

[@feman43]

Crazy cool

[@ericleherissey3252]

Super boulot juste le serrage des platines au couple de serrage identique👍👍👍

[@annechristiansen941]

Thank you very much for the video. 👍🤗👍🇸🇯

[@JimmyZ408]

Stick Ruler, Haven't seen one of those since way back when my ole man carried one, daily. Lol

[@yordi55]

What a blessed man thank you

[@bulenboncuk426]

iyi çalışma kolay gelsin 👍 👍

[@wandersonmuniz9895]

Top de mais. Like merecidíssimo.

[@user-xo2mq6wt3j]

❤

[@user-xo2mq6wt3j]

Молодец!

[@timeinbu7909]

I hope that spray isn't setting up internal corrosion. Otherwise nice work.

[@aprianto1985]

Great job

[@marc_frank]

didn't think they would be built so heavy guess it makes sense

[@miloudlemlem1520]

a realy pro work ! but is it balanced

[@martyisabeliever]

nice wings my man!

[@heinzd5523]

I would have used this blade as a plug for a carbon fibre mould. As it is, it's way to heavy and would be very hard to balance.

[@ultralighthelicopter]

Thanks for your comment. I haven`t thought about that but i take this into consideration for a future update...

[@dkjens0705]

I would think using pieces of steel stock/square pipe/T-bar etc. to clamp the TE together while foam is expanding and drying would make a more consistent and no gap TE.

[@rendyalfaricky9207]

What is TE

[@marc_frank]

​@@rendyalfaricky9207trailing edge

[@alitn588]

That was art mate.. 👌

[@husseinsalman4759]

Did you use iron bars ?

[@windsurfsongkhla]

Wow U R Awesome Guy Joy To Look thx.

[@cesarmatiasbalderrama3658]

Buen video

[@guibischoff]

essa quantia de furos e parafusos nao enfraquece o aluminio? ao meu ver, a metade dos parafusos ja estaria de bom tamanho... tem coisas que menos é mais...

[@user-jg5]

I follow you from Iraq, thanks❤

[@user-jl8zh2oz9t]

Очень аккуратно!

[@LourencoAlmeida-sm5fe]

Thank you l need this job I find it Sr

[@jorogan4ev]

Just a single bolt to hold the blade to the Main Rotorhead Mount? I'll check those bolts before every single flight, just for a good measure.

[@avalanche9026]

Hmm. Great home imagination. Wonder how they performed?

[@uncledoc9010]

Ach du heilige Zibelemärit! Wahnsinn!

[@ultralighthelicopter]

Gruess uf bärn :-)

[@uncledoc9010]

@@ultralighthelicopter Hammer-Projekt. Ich drück dir alle 3 Daumen!

[@toddhazell925]

A very interesting video. I was wondering if, when you were finding the blade CoG, was if in the same position for both blades, as in the same distance from the leading edge and from the root and tip, for ultimate balance? Also, having one end cap painted say white to help with blade tracking and a reference for which blade holder that it's fitted too.

[@paulbush7095]

I think I got this man. I can’t afford stainless so I guess mild steel will have to do but what could go wrong especially when I’ve got the Jesus bolts holding everything together

[@PavelLaminar]

Awesome!!!

[@brianhaselden9186]

Not bad! Looking good!

[@dave1135]

All those builders in Nigeria would do well to watch this guy, learn how to properly build a helicopter. 😅

[@demoaccount2392]

I don't get it?

[@AutodidactEngineer]

The reason why they are failing is because they are using steel instead of aluminium!

[@blackturbine]

@@AutodidactEngineer they are failing because they lack knowledge, seen one using peice of flat board as propeller, and from everything I'we seen lot of them have access to knowledge just don't want to go through the effort

[@dannydetonator]

Yeah, they should, though.. only thing left to do is figure out geometry and how to make this from replicate this from tinned roof, wood and elephant-bone glue, instead of professional CNC stock material and fully equipped CNC mchine-shop with specialised tools and compounds. But Angola rules!

[@stephenkinyanjui5659]

It's about money

[@joseevaristo8484]

Muito bom Deus abençoe você

[@joseevaristo8484]

Muito bom Deus abençoe você

[@getuliocavalcante5215]

Bravoooooooó

[@user-xg1jg5zu6q]

Я так понял, что обшивка лопасти держится на монтажной пене и чёрной изоленте?

[@SMOKEY-JAYS-DIESEL]

Wow that's impressive 👏👍🏻. What type of adhesive glue did you use to secure all the metal bars and pipe together?

[@juancarloscasabuono6651]

No rivets on the trailing edge at least?

[@TheMarciotec]

The sticker is good. But use the rivets at least every 20cm. If the Adhesive fails, the rivets will remain and it will be for you to check and correct. 

[@ultralighthelicopter]

I was planning to use rivets on the trailing edge, you can see the bore markings here: 21:57 but after a test of a bonded test-blade the adhesive seems super strong and i wait to rivet for now but will keep a eye on it after first spin up tests.

[@1975Per]

@@ultralighthelicopter Did you ever think of spot welding (through welding)? instead of glueing/riveting? Minimal warping I would think. (you could probably still do it if you want to, to add strength).

[@harryharrison4876]

If you’ve ever seen an R22 blade delaminate, you’d use rivets! Love your Porsche!

[@heryprananda4023]

Keren

[@xcarlo72]

I THINK THOSE ARE A LITTLE BIT HEAVY, BUT NICE WORK

[@user-wr6jh3ny3o]

how long is the blade？thanks

[@bobbymoore2223]

When i read building a propeller for a helli i didn't believe it. Wow but those ends are gonna fly out. Just glue holding. But it wont affect flying

[@user-ww7uc5li7b]

Hi The rotor is amazing ! And I have some questions for the detail as below. 1.Are the three iron rods in front of the rotor chrome moly steel rods? 2.Does the middle of the rotor need no nails or rivets to fix it? 3.Is the caulking glue must the same as you used in video? 4.Is there any design drawing for reference? Liang

[@fantomas2333353]

37:00 - It seems to me that these blackened oxidized bolts can play a trick on you. 🤔🤔🤔 Probably still need bushings for bolts in this sandwich.

[@Saimon164]

Complimenti veramente, e parecchio tempo che seguo il tuo canale, sono curioso di vedere il bilanciamento statico e dinamico delle pale del rotore. 👍👍👍👍👍👍

[@ultralighthelicopter]

Grazie mille... Sì, bilanciare le pale del rotore sarà un passo successivo interessante...

[@JeffChoppah]

Excellent, I loved this approach because if the twist in it. But couldn't get the right tubes anywhere i enquired...I would be flying or crashing mine by now had the blades not been this much of a headache, building them now the mosquito way. See you on hover mate. 😅. Spin up your engine I need to see how your gearbox breather leaks are circumnavigated.

[@ultralighthelicopter]

Thank you... Im looking forward for your approach on the blades...

[@alke5879]

HI! How will you balance them?

[@jimmytwizzle7836]

Well all that steel and aluminium certainly beats that rubbishy lightweight carbon fibre stuff.

[@aliseddigh9057]

❤❤❤