Human Powered Helicopter Design by Eldorado

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Expand view Topic review: Human Powered Helicopter Design by Eldorado

Re: Human Powered Helicopter Design by Eldorado

Post by Eldorado » Sat Oct 06, 2012 9:56 pm

Believe me Ironman........from what I have studied from their designs....

they have:

1) Apx 20 rpm and a fixed pitch for their rotors
2) Can achieve heights of 10 ft
3) Have 8 Rotors with a large surface area of contact
4) Uncontrollable flexing from the rotation of large diameter circular motion of rotors on each leg
5) Lack of compensation for the forward motion maintained through both the pedals and hand cranks
6) Lack of compensation for the lateral movement that occurs when the rotors have moved out of their symmetrical formation, causing an uneven displacement and tilting to one side from its central and pivotal point

Two concepts can be proposed:

1) Create a "Lofting Effect", as in the Quads, with the multiple larger rotors displacing a large area
2) Create a "Slicing and Climbing Effect", as in the BIRD, with the sleeker and higher rpm rotors, with a denser momentum-generating solid-cored extrusion, for additional momentum and rotor rigidity. Combined with an adjustable collective pitch control, we can generate massive rpms......10-15x's faster, while still displacing about 40% of their surface areas.......in a more efficient high rpm drivetrain......

In closing......if theirs flies on 20 rpm..........Im sure ours will be able to fly in the easiest gear we have on the drivetrain breakdown.......while maintaining 240 rpm........and be able to adjust the rate of climb by up to 300% through a single collective pitch brake lever.

The rotor head and all four rotors on my BIRD are designed to weigh in at 40 lbs.....Here's how easy it is to pedal mine.....

.....Imagine pedaling a bike that has been lifted up and placed on jacks, and you turn a back wheel that's 40 lbs.........but you are turning it through a set of 9 normal gears........you have the biggest gear on the cassette, to start in and you can pedal the bike up steep terrain with this gear......and when pedaling this gear on flat ground it feels VERY easy to spin the bike's wheel......

Thats the type of gear ratio's we have installed in the BIRD.......and the BIRD is designed to be slightly more challenging to fly, compared to riding a normal bicycle and the resistance felt while pedaling.

I'm feeling confident...... :dancer:

Re: Human Powered Helicopter Design by Eldorado

Post by The57ironman » Sat Oct 06, 2012 9:15 pm

.

....so the main issues are weight and material strength...?


.

Re: Human Powered Helicopter Design by Eldorado

Post by Eldorado » Sat Oct 06, 2012 8:53 pm


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Struggled to maintain altitude, and during descent was drifting due to a drastic reduction in torque to the rotors.......gradually autorotating the craft down..........was thinking they would wreck again
they run their drive to the quadrotors out on pulleys with strings.... so it will be difficult to get them going back to speed when needed to correct the drifting with loft, plus the drag effect is huge on their rotors....they are bulky and cant cut through shit..........

here's another fatality......


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Re: Human Powered Helicopter Design by Eldorado

Post by Eldorado » Sat Oct 06, 2012 8:45 pm


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I see a rip-off here :headscratch:


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And another rip-off here :headscratch:


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Man they spend a lot of money....... :lol: :headscratch:

Were Spending $5000.00 max to build ours......

Re: Human Powered Helicopter Design by Eldorado

Post by Eldorado » Sat Oct 06, 2012 7:09 pm

These girls are ready to ride for sure.......it's not yogurt they are talking about.........something about a rickshaw........the best way to pick up chicks....literally....

........such a fun ride.....


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Re: Human Powered Helicopter Design by Eldorado

Post by Eldorado » Sat Oct 06, 2012 4:53 pm

mediasorcery wrote:You need to develop gearing and maybe a gyro to convert the foot power into enough energy to run those blades, otherwise, wont work, but , interesting idea.


Let me clarify....PRE-LIM-I-NARY.........that means about four to eight more hours putting little gears on the cogs, and putting the tail rotor together........all done after that....OH and a set of skis underneath for style and some reinforcement for a bouncy landing.....prob come down hard a few times.....

Gears are included already including an I-Motion 9 speed internal geared hub.....the only HPH choppah to have one so far......we also have included a Neodymium Magnetic Ring used to suspend the rotor head above the thrust bearings in the main axle, to give it almost a zero resistance rotation

direct drive with a freewheel is all you need.....and that's what I have baby.......

basically MediaSorcery is a fool acting intelligent......thanks for the encouragement dickhead.......see you work on Human Powered Helicopters all the time and would have the specific calculations I was looking for right???.....HAHAHAHA

You might want to check this out. It may help with your design?


Basic........Have checked it out........no insight into the concept provided from anyone other than a few dudes on PhysicsForums.com...

Toxic32......thank you though :cheers:

What software did you use to pick your airfoil?


AutoCAD2012 exclusively.......I'm going to upload the frame and rotor head into Cosmos to get an assessment of leverage and stresses imposed on the movements of the parts and their resiliency to flexing.

I snaked the cross section of the rotor contour from the Apache AH-64.....known for lifting heavy weight in a small package......

and then modified it with the fusion of elements from the designs of large model helicopters, to reduce the drag at the end of the rotor blade, to allow the leading edge to fly at the anticipated rpms........

each rotor is independently spring tensioned....and there is a single brake lever that will actuate the collective pitch features of the rotor......allowing me to generate rpm and take off quickly to the max height of the competition, and hover for 55 more seconds..............

to win the prize........

Im the only one with a scaled down version of a functional helicopter in existence today.....all the other Ultralight rotorcraft dont have the rigidity to maintain repetitive attempts, nor the rigidity to control the pitch of the overall vehicle, as their Quadricopter designs cannot harness the gyrocscopic effect of the pilot pod suspended below the rotorhead, due to the slower rpms...........

They can function in the applications and parameters of the challenge, but not as needed to maintain stable hovering, and control of the vehicle within the 30' square area beneath the choppah....

They get to a hovering point and begin to drift uncontrollably.........

My design counters the entire problem through a balanced positioning beneath the rotorhead, from where the pilot can pivot the chopper slightly from side to side, or pulling or pushing the angle of attack forward or backward to control any drifting

There is no cyclic control over the rotorhead to achieve lateral movement, but you can keep the BIRD from leaning, by leaning the other way until the gyroscopic effect returns to its balanced state.......

I just hope we get to see another few crashes from the other teams.......!!!

I love to see schools wasting money.........something to the tone of 250K..........just to try to win the prize of 250K.......

nothing like a few more years of wasted R&D at the hands of an experiment......... :lol:

Re: Human Powered Helicopter Design by Eldorado

Post by Cia212 » Sat Oct 06, 2012 11:32 am

Does Autocad have a CFD function to test the rotor? Something like Floworks in Solidworks?

What software did you use to pick your airfoil?

Re: Human Powered Helicopter Design by Eldorado

Post by Toxic32 » Sat Oct 06, 2012 11:07 am

You might want to check this out. It may help with your design?

http://en.wikipedia.org/wiki/Human-powered_helicopter

Re: Human Powered Helicopter Design by Eldorado

Post by mediasorcery » Sat Oct 06, 2012 10:58 am

You need to develop gearing and maybe a gyro to convert the foot power into enough energy to run those blades, otherwise, wont work, but , interesting idea.

Re: Human Powered Helicopter Design by Eldorado

Post by Tjahzi » Sat Oct 06, 2012 9:46 am

woah man..

awesome :flop:

hope you will take off soon :dancing:

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