Thanks for any help

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Thanks for any help

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5,510 Posts

The old backwoodsman sent his son to school to get some learnin'. The kid came home after a year of school and the old man asked him to say something to reveal his new learnin'.

The son replied, "Pi R Squared."

The old man, became quite agitated and said he' never let his son return to this school.

"Pie are round, it be da' Crumb Bread are square!"

Anyway, you don't want the Pi*R^2 formula... that is for the Area of a circle.

You want the other forumla, Pi*D to get the circumference.

So 20-ft times Pi (3.14159....) Equals about 62.83 ft. give or take a few inches for thermal expansion/contraction.

Joined

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430 Posts

The formula for the circumference of a circle is:

pi (3.1416) times diameter or in this case,

3.14 X 20 = 62.8 feet. there are other ways but this answers the question.

You should always buy a little extra.

Later

Rick Marty

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366 Posts

You're going to tire of a plain circle real quick and want to do more. If you have access to a good rail bender (train-li), then I recommend you get all the track (at least 100 feet) you can afford or borrow for, regardless of straight, curved or whatever. Track prices are going up almost every day. You'll use it all eventually.

Michael

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116 Posts

Regards

Joe Mc

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245 Posts

I put stakes in the ground, marking the layout. Then I assembled most of the track and trackbed, before I actually raised it, using 2 reebars every 0,5m (1,5 foot).

The whole process was very rapid, and I got a track to run on in only a few days. You can se the whole process at http://web.mac.com/anders.grassman/iWeb/Topsida/Einfach_Garten_Gleisbett.html

However, you have to use twice as thick wooden planks, than depicted, or they will sag in a few months... (I added iron angle underneath.) Also, I found electric cable straps to weak, and replaced them with the common soft iron wire normally used to join reebar. The track has remained stable and useful since.

But, after a few derailments causing the trains to plunge 2,5 feet to the ground, I've decided to use the much wider (discarded) restaurant trays as roadbed for a replacement layout. The trays are of laminated (dishwashable) wood = extremely weatherresistant and incredibly stiff.

I guesss I diverted some from the subject... ;-)

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