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Two weeks ago, I listed out some statistics on government spending.
Many of you had a lot to say about it - specifically on the loaded
discontinuation of the F22.
Greg O. from Chicago would like to bring attention to a PDF defending
the F22 design itself, separate from larger spending questions.
"National defense should be the only thing in which the
federal government is involved," Mike S. writes. "Let the states handle
other issues as they see fit. The government is spending other people's
money."
Lee S. from Virginia: "Our growth and stability will be
realized with a lower debt-to-GDP ratio, plain and simple. The
current administration has taken actions to stabilize the economy.
Shortly it will be time to ‘pay the bills' so we can have a balanced
budget."
Nabi I. would like to know whether F22 maintenance is
mostly parts or labor costs: "Labor in this case is military labor;
isn't that relatively cheap?"
J.S. of North Carolina:
"We could all have first-class healthcare, educational systems, and
infrastructure with a little trimming of budgets to support the
military-industrial complex and banks. But few seem to mind when it's
the military and their suppliers at the public trough. Or maybe they
just do a better job of hiding it in multiple budgets, as well as
locating facilities in every Congressional district and state."
Writes international reader Stephen J. from Australia: "I say
spend more on people in need, and less on military might. The
U.S. and its people deserve better social-support and public health
systems. Not to say that Australia is leading the way. However,
conservative governments find easy distractions from reality, to blame
people who cannot defend themselves."
"Why would you call out
the F22 spending?" asks Rich S. "Are you against the program? Yet
according to the link, the Treasury department is to get $90,000,000,000
of TARP. Whatever happened to shovel-ready projects?"
You're invited to supply your own commentary on the cut F22, as well as
answer the question posed by Nabi I. To Rich S., thank you for your
pointed question. Suffice to say that I'm personally a pragmatist.
You're right in that the TARP program (which remember, passed in
2008) may be more unfortunate than other programs (such as that
for infrastructure or the F22) that might catch flak, to use a
term of aviation — if only because of its scale and (in my mind)
relatively vague purpose. As always, I welcome all of your additional
comments.
— Elisabeth Eitel
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In the first installment of this two-part series we
discussed the background of dc motors, brushed types, and ironcore
versus coreless types. Here we cover other dc motor varieties and their
use in applications.
Unlike brushed varieties, brushless dc motors cannot be operated
directly off of straight-line dc voltage. Remember, brushless motors use
electronic commutation — so again, no brushes make physical contact
with the commutator. A permanent magnet rotor initiates motion by
chasing a revolving magnetic field induced by the current in the stator
windings ...
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When you want to drive your car at 65 mph, you depress the
accelerator until the speedometer reports the target speed — simple.
But what happens when you start driving up a hill? The car slows because
the torque to move a car at 65 mph on flat road is no longer enough —
so you respond by pressing the accelerator further down. Your foot, the
speedometer, and your brain have formed a control loop.
Similarly, modern industrial controls are often required to regulate
processes as part of a control loop. Let's review.
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The situation was perplexing. From the beginning, management
seemingly accepted and sponsored the project. But now, they didn’t
seem to know how or even want to make it work. The painful lesson: When
people in charge are not willing to manage automation on an ongoing
basis, more than likely the project will fail.
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C-Lube Unit for Cam Followers
 IKO C-Lube Unit for
Cam Follower is a lubricating part attached to the cam follower. Since
lubricating oil, which is indispensable to the outside diameter surface
of the cam follower outer ring and track surface is supplied, periodical
oil supplying is not required. It realizes a long period maintenance
free operation of the track surface.
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Check Out the New EET Website
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