Why the Space Shuttles SRB's are the size they are

Some tounge in cheek lessons for the techie start up below, have an awesome weekend.


A LESSON ON RAILROAD TRACKS

The US standard railroad gauge (distance between the rails) is 4 feet, 8.5 inches. That's an exceedingly odd number. Why was that gauge used? Because that's the way they built them in England, and English expatriates built the US railroads.

Why did the English build them like that? Because the first rail lines were built by the same people who built the pre-railroad tramways, and that's the gauge they used.

Why did 'they' use that gauge then? Because the people who built the tramways used the same jigs and tools that they used for building wagons, which used that wheel spacing.

Why did the wagons have that particular odd wheel spacing? Well, if they tried to use any other spacing, the wagon wheels would break on some of the old, long distance roads in England, because that's the spacing of the wheel ruts.

So who built those old rutted roads? Imperial Rome built distance roads in Europe (and England) for their legions. The roads have been used ever since.

And the ruts in the roads?

Roman war chariots formed the initial ruts, which everyone else had to match for fear of destroying their wagon wheels. Since the chariots were made for Imperial Rome , they were all alike in the matter of wheel spacing. Therefore the United States standard railroad gauge of 4 feet, 8.5 inches is derived from the original specifications for an Imperial Roman war chariot. Bureaucracies live forever.

So the next time you are handed Specification/Procedure/Process and wonder 'What horse's ass came up with it?' - you may be exactly right. Imperial Roman army chariots were made just wide enough to accommodate the rear ends of two war horses. (Two horses' butts.)

Now, the twist to the story: When you see a Space Shuttle sitting on its launch pad, there are two big booster rockets attached to the sides of the main fuel tank. These are solid rocket boosters, or SRB's. The SRB's are made by Thiokol at their factory in Utah .

The engineers who designed the SRB's would have preferred to make them wider, but the SRB's had to be shipped by train from the factory to the launch site. The railroad line from the factory happens to run through a tunnel in the mountains, and the SRB's had to fit through that tunnel. The tunnel is slightly wider than the railroad track, and the railroad track, as you now know, is about as wide as two horses' behinds.

So, a major Space Shuttle design feature of what is arguably the world's most advanced transportation system was determined over two thousand years ago by the width of a horse's butt.

And you thought being a horse's butt wasn't important?

Ancient horse's butts control almost everything... and CURRENT Horses Asses are controlling everything else.

The business plan's weakness

">Your business plan outlines your estimated (operational) expenses but how do you know an investor is not going to look at these numbers and say...'are you kidding me' and right then and there you could loose the guy (his interest)..."How can you as an entrepreneur build these projections most accurately and in a way that will maintain credibility with potential investors? What could be defined as the "best practice" for entrepreneurs dealing with this subject?

Answer by Brad Feld from Mobius Venture Capital, As I’ve said (Brad) in the past, I’ve never met a financial plan for an early stage company where the revenue side was correct. However, I’ve met plenty where the cost side was correct (or – at least – appropriate). The key here is simple – you want to have a cost structure that makes sense, covers all the bases, but doesn’t assume a big revenue ramp to be supportable.

If you are in the very early stages (e.g. a few people and an idea), recognize that your investor is likely going to be funding you for about 12 months to see how things play out. The biggest mistake first time entrepreneurs make is that they fall prey to the idea that they need to put together a five year P&L forecast and cash flow projection. I can guarantee – with 100% certainty – that this model will be wrong. As an investor, I don’t really care about this; rather I want to see how you are thinking about getting to “the next stage” of your business. You get to define the next stage, what it’ll cost you to get there, and what things will look like when you get there.

If you are a first time entrepreneur, go find an experienced entrepreneur to act as a mentor. She can be a first line of feedback your cost model and likely will know a few “financial people” that can help you put together a simple, yet credible model. In addition, when you spend time with potential investors, don’t try to bluff. Tell them it’s your first time building a model like this and that – while you had help – you know you lack experience and are looking for feedback. Try to engage the investor in the process. Listen the potential investors feedback and iterate on your model.

Simple message – don’t be afraid to ask for help.