old man emu

Have a look at these videos. The instructor presents the topics simply. Just be careful because it's American and she refers to using inches of mercury for pressure.

https://www.youtube.com/watch?v=XPNn7YCA9GQ:49

I don't know if this has been posted before, but it is a good story about hidden dangers in the manufacture of aircraft components. The material is interesting, but sorry for the nasally American accent

If you want to see why the only ones who are making a real effort with social distancing and preventive measures, go to any shopping centre carpark and observe the driving habits of the under-30's. Absolutely no consideration for either other people, nor safe operation of vehicles in confined spaces. If the laneway ahead is clear, full speed ahead and the Devil can take to runaway child and the sedan reversing out of a parking spot beside a bulky SUV.

Air Cargo? Since passenger flights are reduced in number, there might be lots of slots available for air cargo during the day.

Look at your digital wristwatch. It shows 2:47.

When you learned how to tell time you didn't consider what 47 minutes after two o'clock meant, but you sure knew that 2:47 was about a quarter of an hour til school finished.

Some are not happy if they can't be unhappy.

That's the definition of a Puritan: a Puritan is one who suspects somewhere someone is having a good time.

Are they the stats for recflying, social aus, or both?

I notice that the activity drops on both sites on the weekends, especially Saturday - all day- and Sunday morning.

I'd be all for a NZ-style 3 week lockdown to stop it once and for all in Oz, but it has to be backed up by detention on arrival for international travellers that will work.

It appears, however, that celebrity or wealth circumvent that plan. Was it Clive Palmer who bought his way out of WA? And Danni Minogue was given an exemption from hotel detention as long as she and her son stay isolated on a rural property.

It is clear that 14 days is insufficient to ensure that a person is not infected. NZ seems to have shown that 21 days are required, and I think that has a lot of virological sense to it.

The Spitfire is so beloved because it was the show pony of the Battle of Britain. Clearly a beautiful thing to look at, and the definitely the Peoples' Champion in the aerial jousting with the Bf109. But at the same time the Hurricanes were taking on the bomber streams. (Bader was flying Hurricanes at this time.)

When the BoB was won and the Germans went over to night bombing operations, the Spitfire and Hurricane were not up to the task as the best tool was radar, which, in the days before minaturisation, were bulky sets of equipment that were best carried by twin-engined aircraft like the Beaufighter.

The Spitfire was built like a racing thoroughbred, but in war, it is the ploughhorse that is the most useful. That lead to the British creating the Typhoon and Tempest which were better suited to the air superiority tasks of the second half of the war. The B-17 and Lancaster are in the same stable as the Spitfire. Both the British and American air forces had other bombers which did as much work as the B-17 and Lancaster, but both of these got the media attention.

In most machinery with a dry hinge I would say don't lubricate.

From the responses above, it would seem that the first step in keeping piano hinges working is to keep them clean. So a stiff brush and a bucket of clean water might be a starter. Then blow the hinges dry with compressed air. After that, the choice is to either leave them without any lubricant, or to use a dry lubricant, like graphite powder. Anything coming out of a pressure can, or any sort of petrochemical fluid is likely to attract muck. After doing a good job of cleaning the hinges, the next thing to do would be to determine a schedule for repeating the process. Probably include it in the aircraft's annual inspection.

I'm sure that an owner is not allowed to arbitrarily delete a manufacturer's maintenance function for the books, but can an owner add a function?

A COVID 19 upside. I was talking to the administrator of a reasonably sized local medical practice yesterday. She told me that the number of influenza cases this year was way down, and attributed it to social distancing and staying out of crowded workplaces.

Not sure how you can call the FW190 a plain Jane, very elegant design in my view!

I just meant that it wasn't given the pinup status of the Bf109. I suppose the FW190and the Hurricane will always be the bridesmaids, never the brides.

It seems that developing a vaccine for COVID19 could be a case of shutting the gate after the horse has bolted. By the time the vaccine is developed and tested, the pandemic might be over. However, that does not make the research effort a waste of time. The knowledge gained from that research can be used to further out knowledge of viruses and their infection methods. It's a bit like teaching the horse not to bolt through open gates.

One thing is a certain bet - there will be infections by this family of virus in the future. Coronaviruses are common human and animal viruses. They were first discovered in domestic poultry in the 1930's. In animals, coronaviruses cause a range of respiratory, gastrointestinal, liver, and neurological diseases. Only seven coronaviruses are known to cause disease in humans:

• Four human coronaviruses cause symptoms of the “common cold.” These have catchy names which you’ll be forgiven for forgetting: 229E, OC43, NL63, and HUK1.
  
• Three human coronaviruses cause much more serious lung infections, also called pneumonia: SARS-CoV in 2002 (severe acute respiratory syndrome or “SARS”), MERS-CoV in 2012 (Middle East respiratory syndrome or “MERS”), and SARS-CoV2 (the current pandemic know as COVID-19).
  

A “novel” coronavirus means that it is a new coronavirus that has not been previously identified in humans. This means it is different from coronaviruses that cause the common cold, and those that caused SARS in 2002 and MERS in 2012. Like, SARS and MERS, the novel coronavirus is a zoonotic disease. The definition of a zoonotic disease is one that begins in animals and is transmitted from animals to people.

So working on a vaccine for COVID19 will provide the groundwork for the next iteration of coronaviruses. The trouble is, ther's no way of telling which mutation of the virus RNA will result in a pathogenic virus. Another problem is that viruses reproduce asexually, so you can't halt them by castrating one sex.

The Spitfire and the Bf109 were the products of the early change-over from biplanes to monoplane fighters. Both were made to fill the role of short range interceptor, and that fact limited their operational tactics. At the relevant times, this lack of range did not matter as at the start of the war, the Spitfire was operating over its own territory, but the Bf109 was on the long haul runs. Later the situation reversed as Germany went on the defensive.

Both planes became the pin-ups of their times, but other aircraft - the Plain Janes - did a lot of the work. That the Spitfire and the Bf109 formats remained in the Front Line all through the war, and afterwards is due to their good fortune in being able to be upgraded as required. For the Spitfire, control of the air over Britain enabled a good fighter to be constantly upgraded despite the arrival of stronger aircraft having greater firepower and range. For the Bf109, lack of security of German aircraft production meant that it was wiser to retain established tooling than to stop production of the Bf109 and retool for another design.

On both sides there were very good Plain Janes such as the British Hurricane and the FW190. It is only the fact that the Spitfire and the Bf109 appeared in the media more than any other contemporary aircraft that has given both their celebrity status.

There was of course a time when only one person in the world was infected.

Depending on your religeous beliefs that also applies to the Human species

It's not "infected", it's "inseminated"

the greater threat for CV-19 is the fact of it's spread via 'aerosol' sized droplets, (very small).

We measure air pollution as the concentration of particles in the air. The smallest size is PM2.5 – fine particles less than 2.5 µm (2.5 microns) in diameter. Sources include all types of combustion, including motor vehicles, power plants, residential wood burning, forest fires, agricultural burning, and some industrial processes. May also include sea salt. One um (micron) is 1/1000 is one millimetre. A virus is about a thousand times smaller than the micron. Human hair is about 75 microns in diameter.

Therefore, it is not the globs of liquid from coughs and sneezes, but the content of normally expired breath that is the real danger. Recent investigations into the spread of the Black Death have questioned the the rat/flea vector and suggested that its spread in densely populated areas was due to aerosol dispersion.

A problem I find with this discussion is that for people who don't live in the Melbourne Metropolitan Area, simply naming locations as in Turbo's post #80 has little information for the rest of us as we don't know where those places are. Likewise, if I spoke about places like Beverly Hills (NSW), Roselands, Belmore and Campsie how many non-Sydneysiders would know those locations?

In an earlier post I put up a map showing a possible flight within the lock-down zone. I don't know if the route was possible without entering areas where overflying was prohibited by AirServices. That is because I don't know the airspace there, nor do I have a need for the required charts.

The worst part of the pandemic is that you can't see the little buggers that are causing it. With malaria or Ross River Fever, you can see the vectors that are carrying it, but not these ultra-tiny objects. It now appears that it's not the larger spherical droplets that are the problem, but the suspension of the virus itself in the air. We are all familiar with the presence of particulate pollutants in the air and how they remain suspended for who knows how long. The same id happening with the virus. It is even smaller than the smallest measurable pollutant particle, so it will remain suspended in air for ages. That really makes the case for wearing a filtering mask when moving through places where numbers of people are also moving.

Despite our best efforts to regularly wash our hands, what about the rest of our exposed skin and clothing? If the virus is floating in the air, then it has just as much chance of landing on your face, in your hair, or on your arms. Then there's the rest of your body covered in clothing. If hording is the way to go, I'd horde laundry detergent and bath soap.

According to the Victoria Government

Can I get out of the house and just go for a drive?

Yes, however this can only be undertaken within metropolitan Melbourne or Mitchell Shire, and should not involve leaving your vehicle for any purpose except for the four reasons (shopping for necessary goods or services, care, caregiving or compassionate reasons, exercise, and work or study).

According to that, you could do a flight like this.

You could even get up to Seymour. You can take a person who lives with you.

Specific Limitations currently exist for a Melbourne based flyer.

There are truisms and axioms and cliches. The inclusion of the words "currently existing" make that a Trumpism.

You can get anything you want at Alice's Restaurant - exceptin' Alice.

NO wonder Ian is looking for lost aviators to guide to the Sunshine Coast. Ian booked on Jetstar and his scheduled flight was cancelled.

The difficulty is complying with a CASA AD based on the FAA AD will be in the calculation of "Factored Service Hours" as set out in this paragraph of the proposed AD:

Airworthiness Directives; Piper Aircraft, Inc. Airplanes

In explanation of the calculation method the FAA says, Airplanes used in training and other high-load environments are typically operated for hire and have inspection programs that require 100-hour inspections. We determined the number of 100-hour inspections an airplane has undergone is the best indicator of the airplane's usage history.

That might mean that privately owned aircraft might fall outside the scope of the AD because although they may have had many annual inspections during their lives, not many of them would necessarily have been 100 hours after the preceding annual inspection. If a privately owned aircraft had an M/R issued on 1st May, it might not rack up 100 hours by the next 30 April. Therefore it might be better to use TTIS since new. Many aircraft which started life as training school hacks will have their Factored Service Hours calculated from a the combined factored hours based on their life as trainers and then TIS based on hours accumulated since retiring from that lifestyle.

To my mind, however, if I owned an old plane, I'd fork out the money for the inspection just for piece of mind. The result would also assist in determining selling price.

That project has stalled while I build my sandblasting cabinet. SWMBO won't let me start anymore projects until the already started ones have been completed. So the Son came around last Friday night and told me that I was going to help him build a speaker box. He reckoned he only wanted me to hold stuff. Yeah! Like the handle of a saw, a rule and square and a glue pot. SWMBO is not a happy lass - again.

Passed away as a result of Motor Neuron Disease.