Assume the engine is operating at 2400 RPM and the frequency of vibration is the same. The math says 2400 x 60 minutes / hour = 144,000 bending cycles per hour. Some systems have flex and slip joints to allow for motion, so there can be exceptions to how the supports are installed.
As part of the walk around before flight, it is a good idea to grab the pipe (cold of course) and check it for motion. In some installations, some motion is normal, but if the pipe seems to have excessive play or comes off in your hand, it is time to look further before flying.
I have had a personal, frightening experience of an in flight exhaust system failure, but that is another story for another time.
This is a neat web site from the EAA Hotline that
offers a builders construction log. It will track work on
various components or systems, and total the cost and
time. http://www.expercraft.com/
Hot News!:
SAM AND SANDI ARCHER'S 180 HP MURPHY
ELITE
FIRST FLIGHT BY SAM, DEC. 28, 2004
Program:
DON'T MISS THIS! HEAR FIRST PERSON THE EXPERIENCES OF A NAVY TEST PILOT.Keith Crimmin of the FAA will be at Kelso
Flight the evening of Wednesday Feb. 16 at 6:30 for a safety
seminar. This qualifies as the ground portion of the FAA
Wings Program. There is room for about 25 in the class
room. If you are interested, please
send an email to
Whether noticed or not, a projector has
been used in our chapter for the last few years to display
presentations to the masses with great success. Said
projector has been a loaner from one of the members and it is
time to find another source. We have the opportunity to
obtain a very nice projector at no cost to the chapter.
This proposal will explain the details of the EAA1111 projector,
the raffle, and answer questions raised at the last meeting.
LCD and DLP projectors are the next step in projecting images
from almost any media source onto the wall. These
projectors are different from overhead projectors or slide
projectors in that they can accept input from computers, VCR's,
and even digital cameras (if you remember the speech at our last
annual dinner, a digital camera was plugged directly into the
projector). The technology behind these projectors has been
on the same fast track as computers in the last few years.
Just a few years ago, these projectors were as large as a
suitcase and cost five to ten thousand dollars making them
available only to businesses and the very wealthy.
Recently, the projectors have become MUCH smaller and MUCH less
expensive making them more appealing to the layman.
Projectors are showing up more and more in residential settings
as the center piece of a theater style audio visual system,
projecting a video image up to twenty feet across.
The raffle is simple. Buy two projectors, give one away to
the raffle winner. Depending on the projector, the cost for
each is eight to nine hundred dollars. At the time of this
writing, Costco was selling the Sharp XR-1S for $899. Paul
later called and told me he can get a 'Infocus' brand projector
at their corporate prices of about $799. If we were to sell
a mere 100 tickets at $20 each (or 200 tickets at $10), we would
have enough money for two projectors and a second cash prize of
two to four hundred dollars (depending on the price of the
projector). A selling point of the tickets is simply a 1 in
50 chance of winning at least $200 (or $400) cash. I am
confident I could sell at least ten tickets. If we were to
split up the tickets among the chapter, I feel selling this would
be simple.
Some questions raised at the last meeting when this idea was
first presented:
What is the difference between a slide projector, overhead
projector, this projector?
All of the above project an image onto a wall. Slide
projectors are limited to film slides as an input media, overhead
projectors are limited to some transparent film with an image on
it. DLP/LCD projectors can have practically any electronic
image input one would normally find on A/V equipment (s-video,
component, digital video input, etc).
What tools are required?
No tools are required to use this equipment. If one were to
use the projector as a home theater, a ceiling mount is always
preferable, although not required.
What will drive the projector?
DLP/LCD projectors can have practically any electronic image
input one would normally find on A/V equipment (s-video,
component, digital video input, etc).
How long before the bulb needs to be replaced?
All projectors use a high intensity bulb to project the
image. All bulbs have a life span. The life span of
most DLP/LCD projectors is around 3000 hours. The Sharp
model listed above has a lower intensity setting which is
supposed to increase its lifespan to 4000 hours. The major
drawback to DLP/LCD projectors is the cost of the bulb which can
run from one to three hundred dollars. I am not sure of the
specific price
What is the sweet spot for a ticket price?
$10, $20... not sure. Any thoughts?
If we decide to do this, I will print some very nice looking
raffle tickets explaining the prize to the potential
winner. We could coordinate the drawing with our annual
fly-in which could also boost participation and 'buzz' in the
fly-in.
Definitely a luxury, but one that is possible if we want to see
it happen.
Please contact Eric Hoppe with any questions.
| President
& Tech Counselor |
Charlie
Rosenzweig |
577-6407 |
searose@kalama.com |
| V.
President |
Paul
Brown |
|
|
| Treasurer |
Fernando
Cuglievan |
636-5165 |
flcugl@kalama.com |
| Secretary
& Newsletter Editor |
Jerry
Sorrell |
263-1532 |
jsorrell@worldaccessnet.com |
| Tech.
Counselor |
Jay
Tabor |
425-6278 |
jtabor@scattercreek.com |
| Member
at Large |
Steve
Steinhoff |
749-5298 |
flyrv@adelphia.net |
| Historian |
Terry
Creamer |
556-1670 |
terry@ados.com |
| Webmaster |
Bob
Taylor |
576-3806 |
bobtaylor15@comcast.net |
| Young
Eagles Coordinator |
Sam
and Sandi Archer |
425-7777 |
sas@toledotel.com |
| Fly
Out Director |
|
|
|