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Anyone work in a really noisy environment that requires hearing protection?

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5 hours ago, Curt said:

Those pics. are awesome.  Would love to see that thing live.  (FWIW.  The J34 is a Westinghouse turbojet, and the J48 is a Pratt & Whitney turbojet.  Different but similar and perhaps they "merged" the two.). 

J34-WE-48 is a single stage turbine variant of the Westinghouse J34.  The P&W J48 is actually a Rolls Tay built under license. Two different engines built by two different manufacturers.

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The formula is not a matter of perspective, it's physics. Nitromethane when fed the same amount of inducted air as an engine firing Jet-A, creates approximately 2x more total thermal energy. This incredible volatility is why it's used and Jet-A isn't. While it has a lower energy of fuel content than Jet-A, both need air to combust. Inducted air held constant, 2x more total thermal energy and this is what pushes you down the track.  

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4 hours ago, Dennis A said:

J34-WE-48 is a single stage turbine variant of the Westinghouse J34.  The P&W J48 is actually a Rolls Tay built under license. Two different engines built by two different manufacturers. 

Both engines are single stage. Both engines are turbojets. A post said the J34-WE-48 was a Pratt & Whitney; it's a Westinghouse. You are correct that the WE-48 is a derivative within the J34 series of engines.  

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2 hours ago, Curt said:

The formula is not a matter of perspective, it's physics. Nitromethane when fed the same amount of inducted air as an engine firing Jet-A, creates approximately 2x more total thermal energy. This incredible volatility is why it's used and Jet-A isn't. While it has a lower energy of fuel content than Jet-A, both need air to combust. Inducted air held constant, 2x more total thermal energy and this is what pushes you down the track.  

Thrust and horsepower are apples and oranges.  HP needs to be generated to produce thrust.  You are saying that since the plane is not moving that HP is zero.  This is a misapplication of the equation. 

The AFR is completely different, you are getting more energy out of the system with Nitro because you are putting WAY more fuel by mass than jet A.  Nitro doesn't need added oxygen for combustion, it is a monopropellant. 

You keep saying energy is created,  energy cannot be created or destroyed according the the law of conservation of energy. 

I think i am going to obey Mark Twain....

 

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21 hours ago, Curt said:

(FWIW.  The J34 is a Westinghouse turbojet, and the J48 is a Pratt & Whitney turbojet.  Different but similar and perhaps they "merged" the two.). 

You are actually correct, sir.

15 hours ago, Dennis A said:

J34-WE-48 is a single stage turbine variant of the Westinghouse J34.  The P&W J48 is actually a Rolls Tay built under license. Two different engines built by two different manufacturers.

Pretty much what Curt said, except they labelled those engines on the Shockwave truck as the J34-48 Pratt & Whitney and didn't even include the WE which I'm guessing has something to do with the name Westinghouse.  Maybe there's something fishy going on, like some allegiance to P&W..  I'll have to confront them next year about this misinformation since it's labeled exactly that way on the brochure!  Good spot by you, Curt.

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22 hours ago, SST said:

In that case, this is perfect for you, SST.  We have our boats, we ski/wake/tube with our boats, we fly our drones with our boats and now we can fly alongside our boats.

For a cool $443K, you can get this jet suit that this British fella invented and has just started marketing it! :D 

 

 

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