Ferrari Mailing List: Re: Gentlemen, start your engines!

[Peter Rychel (dino308gt4]

Tip of the iceberg... Literally and figuratively.

 

Quite some time ago I saw a YouTube video on the operation of that engine with that inlet spike/cone you’re talking about. As much as computers are taken for granted nowadays, slide rules were taken for granted back then. A well-practiced person could work that thing just as fast as a calculator. With log tables at hand, anything can be figured out.

 

By the time I was going through school, slide rules were a thing of the past and I never got exposed to, let alone how to work one. Only much later in life did I finally pick one up. And, only after I had bought a Breitling watch with a rotary slide rule around the bezel (which comes with an instruction manual & large scale template showing basic math functions).

 

 

Peter

 

Sent from Mail for Windows 10

 

 

From: Rick Moseley
Sent: January 10, 2021 9:45 PM
To: Peter Rychel
Cc: The FerrariList
Subject: Re: [Ferrari] Gentlemen, start your engines!

 

It starts with a big hole and lots of steel, lots of concrete.   What you see is just the tip of the iceberg.  

 

In a static test, impressive as it may look, this is only the turbojet with afterburner.  What you are looking at only accounts for about 1/5 the power this beast can produce.  The heart of the J58 is the inlet spike on the aircraft and the air bypass tubes on the engine.   At speed the inlet spike feeds tremendous amounts of controlled air which bypasses the turbojet via 6 tubes that feed directly to the afterburner.  This system accounts for the other 4/5 of the total output.  

 

Those 6 tubes are each about the size of a big exhaust pipe on a pickup truck (~5”)   Yet, a few Olympic size swimming pools worth of air will be crammed through those pipes every second...  

 

If you are looking for a number, I believe it’s on the order of 160,000 shaft horsepower.  

 

Remember, there were some computers around in the early 60s, but this was basically built by some very bright people with slide rules.  

On Jan 10, 2021, at 8:53 PM, Peter Rychel <dino308gt4 [at] hotmail.com> wrote:



I always wondered about the anchoring system for the test stands and how they don’t get yanked out of the ground with all of that thrust acting on it. It looks rather spindly (simple I-beams and angle iron)...

 

This is really cool. It must have been incredible (and deafening) in person.

 

Peter

 

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From: Rick Moseley
Sent: January 10, 2021 7:32 PM
To: PeterGT4
Cc: The FerrariList
Subject: Re: [Ferrari] Gentlemen, start your engines!

 

No sexy legs

But shock diamonds in a static test, that's sexy...

Ya gotta dig that flash of TEB

 

https://www.youtube.com/watch?v=z-PVmtJ0HpU

 

(I loved flying HAVCAP for these guys pre-dawn over the North Atlantic)

 

On Saturday, January 9, 2021, 3:13:35 PM PST, Luke Graves <buyer1austin [at] gmail.com> wrote:

 

 

 

 

 

 

https://youtu.be/liqoMjRT81A