Plastic windmill

[freebeard]

I'm no fan of PVC as a construction material, but how he makes the blades is entertaining:

I Made Endless FREE Electricity at Home with My PVC Windmill

Coincidental, I guess, that his right angle drive centered in the housing.

Were it I, I's go with the design Porsche did in the 1930s. I have a picture in a magazine but can't find it online. All it would require is a longer coupler between the rotor and the right angle drive.

[Piotrsko]

Most half @$$ed assembly I have ever seen.

[freebeard]

Agreed, but I thought the right angle drive with the vertical generator was interesting.

[Logic]

https://www.youtube.com/watch?v=yt0HVg9Pky4

Kited

[freebeard]

Voliris -- nowhere to nowhere shipping?

[Logic]

Originally Posted by freebeard

Voliris -- nowhere to nowhere shipping?

No:

1st: Here's a better use for your buggered (motor) angle grinder/s.

https://www.youtube.com/watch?v=cd1rcL7TiY0&t=14s

Back on subject:

'Windmill' Power (W) = 1/2 x ρ x A x v3 (Cubed)

Power = Watts
ρ (rho, a Greek letter) = density of the air in kg/m3
A = cross-sectional area of the wind(mill) in m2
v = velocity of the wind in m/s
https://www.e-education.psu.edu/emsc...%20as%20large)


and; the increase in wind-speed with height (Cube that!):

https://wind-data.ch/tools/profile.php?lng=en

+ the linked better 'kite' lifting body shape than:

https://www.hackster.io/news/airpup-...y-2b5c1b7e405f
With a 'twinflex string'.
Topped up by onboard H2 electrolysis. (of early morning dew?)

+ a 'trailing prop' HV windmill underneath = ??? Watts (if wind velocity cubed)
Easily made @ home.
That bobs about like a party balloon when there's no wind and isn't blown horizontal when there is, due to aero lift...

All of a sudden wind power is viable, and a viable DIY @home project... isnt it!?


(I know - I know; It'll be made 'illegal' within a weak of the 1st one to fly, despite your 'Kites aren't illegal!' protestations but:
Not bad thinking for a 'Boric Acid nutter' is it!? )

[freebeard]

Originally Posted by myself

Voliris -- nowhere to nowhere shipping?

It was a joke about the computer graphic technician who wasn't paid to represent a port or industrial background.

[freebeard]

Went looking for a topic in DIY, and it's my own thread. Forget the right angle drive; use a differential:

2315 The Differential Wind Turbine

This is a plastic proof of concept.

The significant parameter is the spacing of the blades -- one quarter the diameter of the swept area.

Your typical solid axle car differential has some typical width hub-to-hub. Say 60". That would dictate a diameter of 20ft. and be able to transmit 100 HP. Give or take.

If 10 foot blades and a 75kW generator is too much, maybe the blades could be mounted on the axles with negative offset.

edit: So what I'm wondering is -- does turning the differential pinion down fail the seal at the U-joint yoke? An hypoid drive would offset the driveshaft from the axis of rotation. Plus or minus?

[Piotrsko]

Havent seen a centered pinion in perhaps 50 years, they are all hypoid. Seals seem adequate to prevent leaks in any direction, most leak out the cover.

[freebeard]

IIRC the split-case Beetle tranasaxle had straight cut gears. The hypoid gear is quieter but less efficient. The swing axle case would allow closer spacing of the rotors and maybe an eight foot diameter or 40 HP, but it would have to run in gear. Another possibility might be a UTV differential.

If it pivots on the hypoid gear line and that's upwind it might help with tracking the wind direction.

I think if I was making a dual rotor windmill, I'd just mount two Fisher & Paykel washing machine motors back-to-back and connect them electrically.