Author Topic: First electrical power output from a Pyramid (Read 550813 times)

skywatcher · « **Reply #465 on:** December 10, 2007, 11:50:50 PM »

Quote from: magpower on December 10, 2007, 10:56:41 PM

To find center I was thinking of making a small hole in center of plates then using a laser pointer, to shoot through the hole, might be better than rods, we see.

I think the best way to find the center is not fiddling around with rods or laser pointers, but to calculate and measure it.

The center of the pyramid has to be exactly on the middle axis, so draw the diagonals of the base, and the center is where they intersect each other. So we have the x and y coordinates. For the z coordinate we have to know which kind of center we are looking for. I thought it was clear until i tried to construct it on paper, and also looked at Thomas' sketches.

There are 2 possibilities:

You could take the side planes of the pyramid, which are equal-sides triangles, and construct the middle point of each side plane, which is approx. 29 cm above the base (measured on the plane). When the plane is slanted (mounted on the pyramid) then this point is approx. 23.5 cm above the base plane. When you now construct a line perpendicular to the side plane through this point, it will not even reach the line going from the center of the base upwards to the top of the pyramid.

Thomas has drawn a sketch where he constructed the perpendicular lines from half the height of the pyramid. Then they intersect with the center line, but his sketch is not plausible because he sketched a equal-sides triangle as side-view of the pyramid, which it is not (in the side view the base is 1 m and the two other sides are 0.86 m).

Mounting the converter:

I would suggest not hanging it from the top of the pyramid, but placing it on a stick which is mounted on the base plane.
This gives more flexibility for finding the exact location and orientation (in my opinion).

Walter Hofmann · « **Reply #466 on:** December 11, 2007, 12:12:01 AM »

hi skywaker,
I did the construction and the centerline of the side planes and the midle axis intercept exactly at a hight of 180mm from the base.
greetings
walt

Quote from: skywatcher on December 10, 2007, 11:50:50 PM

Quote from: magpower on December 10, 2007, 10:56:41 PM
To find center I was thinking of making a small hole in center of plates then using a laser pointer, to shoot through the hole, might be better than rods, we see.

I think the best way to find the center is not fiddling around with rods or laser pointers, but to calculate and measure it.

The center of the pyramid has to be exactly on the middle axis, so draw the diagonals of the base, and the center is where they intersect each other. So we have the x and y coordinates. For the z coordinate we have to know which kind of center we are looking for. I thought it was clear until i tried to construct it on paper, and also looked at Thomas' sketches.

There are 2 possibilities:

You could take the side planes of the pyramid, which are equal-sides triangles, and construct the middle point of each side plane, which is approx. 29 cm above the base (measured on the plane). When the plane is slanted (mounted on the pyramid) then this point is approx. 23.5 cm above the base plane. When you now construct a line perpendicular to the side plane through this point, it will not even reach the line going from the center of the base upwards to the top of the pyramid.

Thomas has drawn a sketch where he constructed the perpendicular lines from half the height of the pyramid. Then they intersect with the center line, but his sketch is not plausible because he sketched a equal-sides triangle as side-view of the pyramid, which it is not (in the side view the base is 1 m and the two other sides are 0.86 m).

Mounting the converter:

I would suggest not hanging it from the top of the pyramid, but placing it on a stick which is mounted on the base plane.
This gives more flexibility for finding the exact location and orientation (in my opinion).

skywatcher · « **Reply #467 on:** December 11, 2007, 12:20:44 AM »

Quote from: Walter Hofmann on December 11, 2007, 12:12:01 AM

I did the construction and the centerline of the side planes and the midle axis intercept exactly at a hight of 180mm from the base.

Yes, this was also my result. But then you didn't use the center points of the side planes, but the middle of the line drawn from the middle of the baseline up to the top. From there, the perpendicular line intersects the center line of the pyramid 180 mm above the base plane.

skywatcher · « **Reply #468 on:** December 11, 2007, 02:31:36 AM »

Quote from: Pontifex on December 10, 2007, 12:47:04 AM

The Air Carbon-Gouging Electrodes are not as rare or unknown in Germany as stated by skywatcher.
Try looking up "Kohleelektrode" in Google!
You can even get them via www.ebay.de (a little bit thick though, item number 120195729622).
Here are only a few examples and links for "Kohlelektrode" which are the same copper coated air carbon-gouging electrodes as stated by Walter Hofmann:

http://www.muehlmeier.de/schweisskat/katalog_039.php

http://www.rehm-schweisstechnik.de/index.php?xC=Kohleelektroden&sessID=39f4a45c89c12b7429808e8177798f17

http://www.produkte24.com/ctp/2813/1/normal/

Greetings, Pontifex

Thanks for the info.

I have ordered a pack of 50 electrodes (4 mm x 305 mm) which will be more than enough for me

so if anybody (in Germany or sorrounding countries) will need carbon rods, maybe i could send him some... i hope i will get the stuff before christmas.

vipond50 · « **Reply #469 on:** December 11, 2007, 04:34:33 AM »

Hello Group
Looking at different types of Gypsum board.
Was there a spec. of board thickness or type of board? Considering this
http://www.nationalgypsum.com/products/product8.aspx

It is a 1/4"(6mm+) high flex drywall board for final construction.

Comments?

Thanks
Bill

2toxic4u · « **Reply #470 on:** December 11, 2007, 08:38:44 AM »

Hi vipond50,

As far as I can remember the thickness required was 1/2 an inch (12mm) for the gypsum boards.

Thanks for sharing with us.

Best regards
2toxic4u
-------------

pese · « **Reply #471 on:** December 11, 2007, 09:04:51 AM »

Quote from: 2toxic4u on December 11, 2007, 08:38:44 AM

Hi vipond50,

As far as I can remember the thickness required was 1/2 an inch (12mm) for the gypsum boards.

Thanks for sharing with us.

Best regards
2toxic4u
-------------

yes , (but) because in germany (austria) you find only 12mm and -rare- 10mm at some maket places).
TT sayd that also an "painture" is ok , if it contains pipsum !
(on wood , enz.) so the 6mm is in any way OK.

G.P.

Koen1 · « **Reply #472 on:** December 11, 2007, 12:10:52 PM »

Quote from: skywatcher on December 10, 2007, 11:50:50 PM

I would suggest not hanging it from the top of the pyramid, but placing it on a stick which is mounted on the base plane.
This gives more flexibility for finding the exact location and orientation (in my opinion).

What do you mean finding the exact location and orientation? It's supposed to be right smack in the center of the pyramid... Not much other locations to try, really...
As for orientation, I thought it was the pyramid itself that had to be aligned to the north somewhat, not the converter inside the pyramid...

And I also thought there was a reason for mounting the convertor hanging from the apex, as the convertor and its suspension are copper tubing, connected to the apex of the pyramid. Obviously a conductive connection to the conductive pyramid frame will have different properties than no conductive connection to the frame.
Although Trawoeger has not said so, it seems to me this conductive connection plays a role. I may be mistaken, of course.

georgemay · « **Reply #473 on:** December 11, 2007, 12:25:26 PM »

Quote from: Koen1 on December 11, 2007, 12:10:52 PM

And I also thought there was a reason for mounting the convertor hanging from the apex, as the convertor and its suspension are copper tubing, connected to the apex of the pyramid. Obviously a conductive connection to the conductive pyramid frame will have different properties than no conductive connection to the frame.
Although Trawoeger has not said so, it seems to me this conductive connection plays a role. I may be mistaken, of course.

Koen1

here are TT words from his former web site:

"Now you need some Plastic-Tube wich fits prefectly into your 3/8" Tube on the top of the Pyramide. (Installation-tube for electricals)

Stick in the Plastic-Tube and fit it good. Then mark the Center of your Pyramide on this tube."

To my understanding this should act as isolator. Now maybe I am wrong? because plastic tube was used for marking only

George

Koen1 · « **Reply #474 on:** December 11, 2007, 12:41:11 PM »

Hmmm well I am not sure...

All the pics I've seen do not show a plastic tube at all, they show a copper tube connected to the apex...
And I do know that plasitc tube as well as welding rods of exact length are used to determine the exact center of the pyramid...
So it might be that the plastic tube is only used to determine the exact center of the pyramid, or it may be that I am simply slighlty blind and there is indeed a plastic tube connecting the copper tube to the apex...

Maybe Pese knows?

neptune · « **Reply #475 on:** December 11, 2007, 01:12:54 PM »

Quick post Do not use playsand, this is not sand, but crushed limestone. Thomas said, hang converter on non- conductive thread. Video , which is NOT the v6, uses copper tube support, but this may be insulated from steel frame at top. Gotta go to work...

neptune · « **Reply #476 on:** December 11, 2007, 01:15:46 PM »

Thomas specifically said that the thickness of gypsum board was not important

Koen1 · « **Reply #477 on:** December 11, 2007, 02:15:00 PM »

Hey, what happened to the forum at www.trawoeger-pyramide.info ?

What kind of sick joke is that? First you lure all the interested people to your forum,
you run it for 2 weeks, then you whipe the entire forum without even telling any of the registered users by email?
Why?

This lowers my respect for mr Trawoeger tremendously. Get people excited and then disappoint them by whiping all info?
Surely the few lurkers that did not share information cannot be the reason for this?
I thought the entire idea was to have an active forum for people to discuss the pyramid replications, variations, and theory?

If this is the way Trawoeger tries to stimulate the pyramid "community", then perhaps he should do a quick course in social interaction?

starcruiser · « **Reply #478 on:** December 11, 2007, 02:18:15 PM »

The converter is isolated from the frame using the plastic tube, it is an integral part of the design. TT mentioned this prior. The ground lead is tied to the pyramid frame and the converter is positive in respect to the frame so connecting the converter with a conductive pipe to the apex of the frame will effectively short it out.

Koen1 · « **Reply #479 on:** December 11, 2007, 02:37:54 PM »

Well that's another reason why I'm so ticked off about the forum disappearing:
a full step by step build description was on there.

I thought the point of the forum was to get everything clear for those who want to replicate,
so that we don't have to have these discussions...

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Author Topic: First electrical power output from a Pyramid (Read 550813 times)

skywatcher

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Walter Hofmann

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skywatcher

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skywatcher

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2toxic4u

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neptune

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