Giant Wind Turbines Bring Down Piper Warrior.

[DPS]

How would you like to have these beauties in your back yard?

http://www.youtube.com/watch?v=RJuAUxGWdEI&feature=channel

Now, thinking caps on. If the propeller disk diameter is 200m what is the tip velocity at 20 rpm, and at what rpm do they make a big "BOOM!!"

 

[Skittles]

The tip is travelling 12566.37m every minute.

This means it has a velocity of 209.440m/s at 20rpm.

The speed of sound is 343m/s.

RPM required to break the sound barrier at the tip: 32.75rpm.

Unless I've cocked up.

 

[Bone]

LOL.

 

[Bjoern]

I laughed! :d



(Seriously though, upon reading the thread titel I got ready for a serious discussion between renewable energy enthusiasts and pilots.)

 

[CheckSix]

Hey, DPS, was that Tony B'Liar the turbine took out at the beginning?

 

[stuartcox]

Another great video from the same source:
"Jeremy Clarkson had a dream"
http://www.youtube.com/watch?v=VbpGKb__L2g&NR=1

 

[DPS]

Well done, Skittles. You were first to the correct answer. I wonder how far a 'shed' blade would travel if it failed at the root at 20 rpm.

CheckSix, the turbine was officially opened by Sir Jimmy Saville who 'Fixed It' for the good folk of Dundee to have permanent blade flicker/strobe lighting effects during daylight hours.

Now howz about that then?

 

[limjack]

LOL, I like um both

 

[cheezyflier]

very cool video!

 

[CheckSix]

"Now then, now then... Guyz n gurlz...." Geez is he still alive DPS?

 

[DPS]

CheckSix. Yes, Sir Jimmy is still going strong. Think he might have hung up his running shoes though. I saw him trotting down the A30 (or A303) many, many years ago.