Author Topic: Shadows studies - Raj  (Read 17127 times)

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Offline elevenaugust

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Shadows studies - Raj
« on: June 12, 2008, 04:57:27 PM »
From 10538

BTW Spf,

I saw the analysis you did on the inconsistency Marvin pointed out.  Is it possible the shadow from the long arm may be partially at fault?
« Last Edit: June 12, 2008, 05:12:24 PM by elevenaugust »
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Offline elevenaugust

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Re: Shadows studies - Raj
« Reply #1 on: June 12, 2008, 05:06:11 PM »
From Spf33:

Is it possible the shadow from the long arm may be partially at fault?

no, i don't think so.  the shadow would be falling in the opposite direction if you are suggesting that the plane goes from dark to light because it is in shadow.

i'm fairly certain that it's nothing more than a highlight from the sun as that plane just barely gets a glancing angle with a tiny bit of rotation.  i might be able to test this a bit more because omf user hpo has sent me his model, the most accurate model created so far which should help with analysis.

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Offline elevenaugust

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Re: Shadows studies - Raj
« Reply #2 on: June 12, 2008, 05:08:33 PM »
From 10538

I spent some time looking at Marvin's problem.  Here's what I have.  Basically the same as BFT with the dark pipe added.


Thanks also to hpo for the graphic.
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Offline elevenaugust

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Re: Shadows studies - Raj
« Reply #3 on: June 12, 2008, 05:11:36 PM »
From 10538:

Oops!  It seems I have made a mistake.  The dark area is not actually there. 


So I can't at this time come up with an explanation for the dark area in pic 16.  Still trying to figure out if it's caused by the long arm.
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Offline elevenaugust

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Re: Shadows studies - Raj
« Reply #4 on: June 12, 2008, 05:13:51 PM »
From 10538:

Can someone point me to a 2D cad drawing or other representation of the Raj drone?  I'm specifically interested in an underside view of it.  Thanks.
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Offline elevenaugust

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Re: Shadows studies - Raj
« Reply #5 on: June 12, 2008, 05:14:53 PM »
From Spf33:

Can someone point me to a 2D cad drawing or other representation of the Raj drone?  I'm specifically interested in an underside view of it.  Thanks.

http://img408.imageshack.us/img408/565/hpodronelineds5.gif
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Offline spf33

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Re: Shadows studies - Raj
« Reply #6 on: June 12, 2008, 06:49:45 PM »
anyone know how hard the "always oriented NS or EW" rule is on utility poles?
are they supposed to be always 100% aligned to a compass?






Offline 10538

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Re: Shadows studies - Raj
« Reply #7 on: June 12, 2008, 07:27:34 PM »
anyone know how hard the "always oriented NS or EW" rule is on utility poles?
are they supposed to be always 100% aligned to a compass?

Never heard of it.  Of course I'm no expert on power poles.  This may be better put to Ken on OMF as he was a lineman.  But I really don't see the logic in aligning poles to a compass but instead it would make more sense to align them for their purpose of supporting the power lines and spreading tension forces to minimize weak spots.

BTW thanks for posting the 2d hpo graphic.



Tough to say.  First we must understand the wires cannot touch the wood.  There MUST be an insulator. 

Once again the drone seems to be tilted in such a way to almost align itself with the sun angle.  Am I the only one who finds there might be a pattern to this?  How about the odd tilt as it passed over the power pole?
« Last Edit: June 12, 2008, 07:49:50 PM by 10538 »

Offline HPO

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Re: Shadows studies - Raj
« Reply #8 on: June 12, 2008, 10:40:14 PM »
From 10538:

Can someone point me to a 2D cad drawing or other representation of the Raj drone?  I'm specifically interested in an underside view of it.  Thanks.

Hi, when you download this free program called 'Edrawings' on this location http://www.solidworks.com/pages/programs/eDrawings/e2_downloadcheck.html
you can view my 2D and 3D Solid Works drawing from all angles.

P.S. you don't have check the " Yes, I want to view 3D XML and PRO/E files using eDrawings viewer. " option

2D download http://www.hpaymans.demon.nl/Dronetest/Drone%202007-05-16.EDRW
3D download http://www.hpaymans.demon.nl/Dronetest/Drone%202007-05-16.EASM


-HPO-

Offline nekitamo

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Re: Shadows studies - Raj
« Reply #9 on: June 13, 2008, 11:29:23 AM »
Thanks for sharing, HPO!
The level of detail is truly amazing, you did a great job!


Offline 10538

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Re: Shadows studies - Raj
« Reply #10 on: June 13, 2008, 03:52:10 PM »
Same here, HPO.  I'm looking forward to seeing a pic of the physical model.  :)

Offline spf33

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Re: Shadows studies - Raj
« Reply #11 on: June 13, 2008, 04:39:47 PM »
Never heard of it.  Of course I'm no expert on power poles.  This may be better put to Ken on OMF as he was a lineman.


hm.  ok, well in the 3d scene i have the pict16 pole aligned pretty much aligned to the nsew compass.

i remember mentioning at some point that i didn't think changing that ns orientation affected the simulation results much on p16. but ever since you've pointed out that curved shadow that looks like the nub is casting it, i'm really wondering.  the curve is seen in p15, not in p16, and the shadow seems completely gone in p17.

hpo - thanks for sharing the edrawing!



Offline 10538

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Re: Shadows studies - Raj
« Reply #12 on: June 13, 2008, 05:23:56 PM »
Yes.  My suspicion is that the when the drone tilted, the shadow of the long arm was moved lower than the side attached appendage in #17.


Offline 10538

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Re: Shadows studies - Raj
« Reply #13 on: June 13, 2008, 05:33:30 PM »
hm.  ok, well in the 3d scene i have the pict16 pole aligned pretty much aligned to the nsew compass.

I am looking at poles in Capitola on google maps and they do not seem to respect NSEW.  Seems they are aligned with the streets.  BTW, most of Capitola is now on Street View in google maps.  Good luck all you pole hunters out there.  Be sure to look for this street lamp.



The Raj lamp has been identified as a variation of an "American Electric SRX-55".

http://www.soxlamps.com/uk%20and%20overseas_sub.htm

Supposedly, this is a very rare lamp.  If it's in Capitola it would stick out like a sore thumb.

Offline spf33

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Re: Shadows studies - Raj
« Reply #14 on: June 13, 2008, 06:36:54 PM »
Supposedly, this is a very rare lamp.  If it's in Capitola it would stick out like a sore thumb.

has an attempt been made to ask pge about any American Electric SRX-55's in use in capitola?  or if they even inventory that kind of data?