Propeller Backpack Part 2

[@PeterSripol]

Awesome! Have you looked into possibly placing a duct around it to improve some static thrust performance? (And also some safety) Look forward to seeing more! Don't lose a limb!

[@SammSheperd]

I'm gonna weld myself an aluminum frame with a prop guard! Then maybe people will stop treating me like I haven't thought about risk and safety yet :) However increasing efficiency with a duct only works in extreme cases where the propeller design would otherwise be really really inefficient, such as a prop with a whole lot of really fat and short blades spinning really really fast. In that case the duct has to be designed really well with very tight clearances. A long skinny exposed prop will always be more efficient

[@Kabab]

Your video production quality has gone up tremendously. This is better than most kickstarter videos. Now just need wings and a steep hill.

[@SammSheperd]

Thanks! It's amazing what I can do when it's just me and a camera without having to actually do the thing. Now I really want a flying camera rig

[@alanstanley2847]

Rest in peace Samm. You will be missed.

[@Rusty_39]

That was insane! Do you have a killswitch to turn off the motor if you get into trouble?

[@SammSheperd]

The stunt double in this part is my friend, I was radio controlling him :) We did extensive "what if" testing and planning

[@SebastienChedalBornu]

and what speed aprox he reached ??? what would be the batterie mileage ??

[@snigwithasword1284]

I hate to rain on your parade, and I would very much like to see the figures myself, but I suspect the efficiency of this setup is going to suck relative to a similar electric bike.

[@snigwithasword1284]

Of course we could always try more power... :3

[@iforce2d]

I hope you gave that wooden bracket a good stress testing.... it kinda worries me.

[@mavamaarten]

iforce2d it's pushing, not pulling. I'd trust it.

[@GhVost]

Great Job, Man! You are just like "Karlsson-on-the-roof", by Astrid Lidgren.

[@HighBOKILLERZOMBIE12]

Haha yes!!

[@pyro1324]

Is that even a thing outside Sweden?

[@dcatspajamas2012]

Holy crap Samm, the production quality of your vids lately is insane. Nice!

[@MarkLoves2Fly]

I agree, you've had what equates to a quantum leap in production quality. Nice work. :)

[@MovingForwardHome]

I wonder if you were to develop this further it could be a viable alternative to a petrol engine powered paraglider setup? Great channel BTW, I love watching all the fun things you do!

[@MarkLoves2Fly]

@Peter: Yes, this is a thing. Electric paramotors exist, and are freaky cool! The down side is in the power density of the batteries. Liquid fuel, at least for now, is king when it comes to power density. I am a free flight pilot, but would love an electric booster to get me off the ground. (>*

[@MCsCreations]

Damn, I really miss this guy...

[@MrRishik123]

Mumen rider has got an upgrade :P

[@william_2610]

I heard afterburning jet engines provide a lot of thrust ;) On a serious note, this is awesome! I'm sure there are improvements to be made that will make it even more powerful. I wonder if you could have the motor on a pivot and move it up and down with a sensor controlled servo to keep it level and therefore more efficient?

[@cederveltman]

Sample Textᴴᴰ hahaha Imagine samm with a jet engine coming out of his ass😂😂😂

[@SammSheperd]

Buy me a jetcat and I'll do it lol

[@cederveltman]

Samm Sheperd okay, i'l start a go fund me campaign, I think this is going to be huge!

[@elijahf111]

oh shit i live where that store is lol, did you test it there too

[@GhVost]

As a former amateur downhill skier moved to the great planes of Europe and as a quad-copter freak I love your idea with all my heart! I found in one of your videos the one with your blower plane. How do you consider to implement the centrifugal fan to your backpack build? I would consider it as a safer solution. What do you think?

[@SammSheperd]

The centrifugal fan is difficult to make efficient for thrust purposes. High static thrust is easier with a big prop.

[@GhVost]

Samm Sheperd Yes, you're absolutely right: the axial fans have higher flow rate than centrifugal, the only benefit of those is higher compression ratio. The snail shroud will be bulky, comparing to neat cage around the propeller. The only benefit of the twin centrifugal propulsors may be their steampunky look.

[@SmoochyRoo]

You're definitely having way too much fun, buddy. keep up the good work!

[@electricmanist]

What's the take off speed ?

[@Ender_Wiggin]

You should look into MGM COMPRO. They are the top of the line in the RC field. They are also priced at top the line. Would not hurt to check how much current draw you have to.

[@SammSheperd]

wow, quite $$$$

[@Ender_Wiggin]

Ya that is there biggest down side. For our battle bot though they were the only clear choice. Also take a look at the tool i made for Electric motors. www.electric-skateboard.builders/t/google-spreadsheet-for-easy-and-fast-calculations/13337

[@dogzer]

You should turn that propeller into a ducted fan!

[@temmaisequese]

Agree.

[@SammSheperd]

Shroud yes. Duct no

[@christianstephens8858]

Samm Sheperd you should put a gas motor on that thing.

[@dogzer]

You should put double jet turbines! *And to each side.* Your chest is blocking most of the air flow for the propeller. You're creating a void behind your back that's not good for aerodynamics. That's why fast speed cyclists helmets have that weird drop shape. Changing something so small can really help efficiency.

[@loud_n_lowtaco200]

Do it on a skateboard/longboard

[@SammSheperd]

That was the plan. Coming in a later episode

[@loud_n_lowtaco200]

Awesome

[@shutdahellup69420]

Oh man! Sam, you need to make more videos about it trying on different things.... i'm desperate😆

[@jurasofish]

haha did you consider attaching the electric motor to the wheels?

[@SammSheperd]

That wouldn't be nearly as ridiculous though :) And also kinda difficult and more permanent

[@amanieux]

efficiency of motor spinning a propellar vs the motor spinning the bike wheel directly (like in regular e-bikes) must be really bad, why did you wanted to try that as a propulsion system for a vehicule on a flat piece of land ?

[@SammSheperd]

It's not about an ebike. It's about the simple idea and playing with it

[@_HowHardCanItBe_]

Why do speed controllers always fail? I have broken way too many over the years!

[@byronlangerman4468]

Eirik Strand overheating?

[@_HowHardCanItBe_]

This esc features: • Over heat, low voltage, lost signal and power arm protection • Data logging such as temperature, voltage, current, and RPM • Advanced governor mode and smooth start up perfect for helicopters Maybe try to find out what went wrong? I would really like to buy a big motor myselves, but stuff always breaks and I'm tired of it

[@SammSheperd]

I did get a whiff of electrical smoke when I first investigated. Really pisses me off though since it didn't even get hot and I don't know what happendl

[@BladeScraper]

Get a HobbyWing 130HV, affordable and very good at high loads.

[@SammSheperd]

Got one on the way :)

[@SomeGuyInSandy]

That's why you didn't take any chances breaking it earlier... Nice!

[@slothFPV]

Seems like alot of the thrust is going downwards on the bike

[@SammSheperd]

Yea thrust angle was a constant difficulty because it is natural to hunch your back when going fast. I was doing it a lot with the skis earlier too.

[@slothFPV]

Samm Sheperd you should put it on a hinge with a flight controller or something to keep it level

[@vivekar6289]

It's so fun to see and I wish to do this someday 🌟

[@MassDynamic]

say, wouldn't be better if u attached the propelled to the back of the bike? that way, you can reduce drag by lowering your body to the bike and the propulsion would be more stable.

[@SammSheperd]

Not trying to make a propeller bike, just a propeller backpack

[@eoc356]

you should've taped wings to them

[@valiantGLX79]

Great work, you should ditch the Tx/Rx and mount a servo tester somewhere to control it ;)

[@mackiwawa]

bit worried about the prop if you fall

[@Gammaduster]

awesome montage and project !

[@eco19911]

Wow! Looks super dangerous but fun!

[@ignasanchezl]

Don't trust RimFire Specs, also their bearings need oiling. I recommend castle creations Speed controllers 10/10, data logging on them is great too.

[@rajabisskandarani5316]

Keep up and be careful Waiting what will follow

[@vusvis]

Wouldn't it be nice to mount a protection case from an air blower (you know, the kind of fans you put in your living room for fresh air) on it? Just in case you fall or something. Getting struck by a spinning propeller isn't that nice, i can tell you that from my own experience ;-) As always: nice video!

[@SammSheperd]

Next video I will have a safer frame

[@JasmineJu]

Now all you need is a pair of wings.

[@luckydubeinrc5165]

Hey Sam, i want to see the real deal :) if you ever buy a esc upgrade do it again, cheers , like always stay safe, hehe

[@macmaniac77]

Hey Sam. it's been great seeing your videos, keep up the good work! I have an engineering related question in regards to propeller properties. I was once told that Uniblade propellers were more efficient and had some advantages over regular propellers. My question(challenge?) is if it would be possible to build a quadcopter with single blade rotors. or maybe for your propeller backpack, but I have been unable to find anything of the sort. Thanks for sharing and Keep em coming! Why are there no Uniblade rotors for quadcopters or propellers for planes?

[@SammSheperd]

There are several videos where people make and use single bladed propellers. just search for it. It is true that you can achieve greater efficiency using a single blade. This is because in order to apply the same load to the motor even though you have half the propeller, you can increase the blade length. A longer blade has a higher aspect ratio and thus has greater efficiency. You can also imagine the blade has a greater disc area and affects more air. Simply put: Inefficient = Taking a small amount of air and changing it's velocity dramatically (many blades which are fat, high pitch, and spin very fast. Like modern mini quads :) Or a jet engine... Efficient = taking a large amount of air and changing it's velocity relatively little (one long skinny slow spinning propeller) With this in mind, which do you think is more efficient at hovering? Harrier or Helicopter? This is the same reason a Piper Cherokee with it's short fat wing is much less efficient and glides like a rock compared to a glider with it's long skinny wing. (propeller are just spinning wings) However as with everything in life, there are disadvantages. Single blades are more complex to make and balance. Their center of thrust will always be unbalanced. And with full size aircraft the limiting factor is often the propeller tip speed getting too close to the speed of sound, so in order to load a large engine appropriately you must increase the width, pitch, or number of blades (since speed and length have reached their limit)

[@ColeRushlow]

getting the right balance is a problem

[@ledfed1912]

man i would make a propeller guard.

[@wildbutwaesome]

You should try make an e bike with that motor

[@Dieseltorq]

Dude awesome job !!!!!!!!!!!!!!!

[@AcesHighMedia]

Make an EDF backpack dude!

[@SammSheperd]

EDFs suck

[@AcesHighMedia]

Samm Sheperd yes they do, they are supposed to.

[@_visuallycaptured1628]

That sounds sick !

[@PATMCMACK]

Put it on a kayak or SUP board

[@goldfishking5465]

Lol would it be better if u connect it to the chain

[@engelon125]

step 2: attach rectangle step 3: fly!

[@mikedunn7795]

For an electric,it's quite loud,but that's prop noise,I guess.

[@SammSheperd]

Yep all awesome loud prop noise

[@av8tore71]

WAY Too much time on your hands lol Looks fun!! Be careful

[@JamesFenechClimbing]

You look like a superhero :')

[@cyberhuligan6226]

Karlson)very good👍👍👍

[@coc7711]

great i follow your project...i suggest only no not making myself mr.right or a bright one,instead of directing the props.inclined try to put it into a declined angle position so that you will also create a small lift force to decrease your weight and your bike while moving forward or just make it movable like tilting it,like a VTOL V-22 osprey..your the MAN!

[@kimchikoalaa714]

Now, put a DA120

[@MrFatjonable]

Make that big airplane that you ride, Remote Controlled haha :P

[@itsAuffy]

make an iron man suit next

[@maxjones1414]

cool video and nice bike lol

[@osimmac]

GET A PARAGLIDERRRRRR i will help you with muny if u doo

[@SammSheperd]

I mean I would love to do that

[@osimmac]

***** It would be incredible; to do, to see... if it works out well enough i would definitely try it. Nice work btw

[@MarkLoves2Fly]

I'm game! (>*

[@carolynmmitchell2240]

Osimmac can you help me with money

[@muziekklas22]

add some wings to your Bike! :D

[@muziekklas22]

and some more motors.. :p

[@ashaysave4414]

awesome

[@thatdutchguy2882]

Unless you are going to fly that thing in the near future, I'd suggest buying a electric mountainbike instead, go's a hell of alot faster and you'd not need a propellor backpack.

[@SammSheperd]

The point is just to play and have fun not to make an E-bike

[@thatdutchguy2882]

***** Ahh, so why the patron then ?! For the video content ?

[@SammSheperd]

Yep last video was with skis and I do lots of RC/Drone stuff

[@x111-c4f]

fuck that, this is the craziest shit I've ever seen !! ))) hey, you forgot wings !! ))) karlson.

[@jlunaysol1032]

Get this www.mgm-controllers.com/airplanes/tmm-25063-3-for-airplanes-x2-series.html and go 15s already. Haha. Oh, and don't forget a bigger prop. Then hop on that bicycle again! As of the parts you're actually getting, so I can see whether I want to get the parts you're using or not, can you put them all in the description please? Thanks, and good luck.

[@SammSheperd]

I put my setup in the description! :)

[@jlunaysol1032]

Thanks :D

[@thelennipede9382]

ill contact spacex to get you a REAL motor ;)

[@SammSheperd]

+The Lennipede k cool

[@kutaycelik3196]

Didnt know you were a ruder

[@jcopfr]

Original but without interest. Too bad to try this on a track with a lot of resistance to advancement. My electric bike goes faster, is much less noisy and consumes a lot less !

[@SammSheperd]

I'm not trying to make anything useful or better than anything else, I'm just having fun

[@jcopfr]

I see, but if you had tried on a smooth road, your video would have been much more interesting ! Many viewers would have been interested in seeing the speed that can be achieved with your system. Your video don't show it

[@SammSheperd]

it was 35mph on the runway. This is a series of videos, more to come

[@jcopfr]

Ok, hope to see more !

[@kutaycelik3196]

Rider

[@bandzar12]

Be careful with your hands

[@V8Power5300]

Stop overdoing safety

[@StealthElectronVIP]

This is so dumb it's not even funny. Instead of pissing around with a propeller, just connect up the motor to your bike and make an e-bike.

[@SammSheperd]

+StealthElectronVIP that's not the point, I don't want an ebike.