J
John Larkin
- Jan 1, 1970
- 0
John Larkin said:
My client is bidding on one of these:
http://mysite.verizon.net/richgrise/images/Dish-Frame-Partial.gif
And I get to design the tooling fixtures that will hold the sticks
in place while we build the trusses. I haven't drawn in the
circumferential struts yet; I envision them shipping the hub
and 16 trusses and a whole pile of struts to the site, and bolting
it together the way the carnies do a roller coaster.
It's not electronics, except for the signals it reflects to the
feed horn; I honestly don't know if it's for satellite comm or
a radio telescope, a la the VLA. I'm sure that as soon as we get
the PO, I'll find out.
Cheers!
RIch
Cheers!
Rich
Did you get to work on this beast?
Bob
My client is bidding on one of these:
http://mysite.verizon.net/richgrise/images/Dish-Frame-Partial.gif
And I get to design the tooling fixtures that will hold the sticks
in place while we build the trusses. I haven't drawn in the
circumferential struts yet; I envision them shipping the hub
and 16 trusses and a whole pile of struts to the site, and bolting
it together the way the carnies do a roller coaster.
It's not electronics, except for the signals it reflects to the
feed horn; I honestly don't know if it's for satellite comm or
a radio telescope, a la the VLA. I'm sure that as soon as we get
the PO, I'll find out.
Cheers!
RIch
Cheers!
Rich
John said:Only a very minor role. They have installed about 60 RTDs in various
parts of the structure to measure temperature, to adjust for thermal
growth. We're going to supply the data acquisition stuff for the RTDs.
They need about 0.1 C longterm accuracy.
This is an impressive dish. It works to 100 GHz and has an adaptive
surface to keep a near-perfect shape. One of the antennas is a
64-pixel imager, sort of like a real optical telescope. I'd never
heard of a radio telescope that had more than a simple antenna at the
prime focus.
Great pics on the web site.
John
Even more impressive is that beanpole crane. Seems held down just by 4 boltsJohn Larkin said:
How big?
42' 4" diameter. We can only fit one truss at a time in our shop.
The hub is about 3' in diameter, so each truss is a little over
20 feet long; and if oriented orthogonally, over 10' tall. Of
course, we'll design our fixture so that it's kind of tilted,
both for balance and to save space, albeit that makes it closer
to 25' long and about 7' or 8' high.
Say, John, you're a gazillionaire - if you need any precision
fab done, we're only an email away!
Even more impressive is that beanpole crane. Seems held down just by 4 bolts
on a 6' square, yet manages to soar upwards forever. There's no way it
should stay up, never mind do any actual work.
I can't imagine how they got all this gear up onto a 15,000 foot
mountain peak in rural Mexico. One of the guys told us how, for the
first few hours, people get merely exhausted, and then the serious
altitude problems start to kick in.
Hey, John, I'm coming down to Burlingame and Foster City across the Bay
Bridge a lot of times this next few months. I'm what Jim T. calls an
extreme leftist weenie in that I'm a statewide faculty union officer coming
down for what Jim certainly believes are plots against the establishment.
Jim said:RST Engineering \(jw\) said:Hey, John, I'm coming down to Burlingame and Foster City across the Bay
Bridge a lot of times this next few months. I'm what Jim T. calls an
extreme leftist weenie in that I'm a statewide faculty union officer coming
down for what Jim certainly believes are plots against the establishment.
Plot, plot, plot away. Here in AZ we're systematically doing away
with unions. Multiple suits in Federal courts against them for
creating fake non-profit corporations that spread falsehoods about
anyone they're trying to unionize.
[snip]
...Jim Thompson
When does AZ bring back slavery ?
Graham
After Obama becomes president, and a race based civil war splits
the US in N and S again.
You're both fucking retarded.
It would be funny to see the donkey with a bunch of gear strapped to
his back, braying as someone in a cowboy hat whips his ass with a crop to
get him moving down the trail.
Then, he might actually be able to claim to have been a productive
member of society... as a pack mule.
After Obama becomes president, and a race based civil war splits
the US in N and S again.
Hey, John, I'm coming down to Burlingame and Foster City across the Bay
Bridge a lot of times this next few months. I'm what Jim T. calls an
extreme leftist weenie in that I'm a statewide faculty union officer coming
down for what Jim certainly believes are plots against the establishment.
Be that as it may, I'd really like to drop in and say "hi". What are your
offical "visiting hours" and can I bring a bottle of anything decent to make
the time go by pleasantly? Or a chunk of any animal milk fat that has been
rendered and processed?
We've got a bit of Nevada County grape that you've probably never sampled
before that isn't all that shabby. I'd be honored to bring along a bottle
of the best we produce. Red or white, your choice. Or the cheese if you
wish but that won't be from this part of the world.