Jabiru7252

Just wash the thing thoroughly in WD40 - that will do the job.

Have you had somebody else come and have a listen?

I'm curious - why not put tail into wind and stick full forward when tying down? As for the force on the tie downs - gravity is pulling my plane against the ground at 3139.2N (that's 320kg x 9.81m/s^2). To get my plane off the ground the force on the tie downs would have to be equal to and opposite to gravitational force. (Actually, it would have to exceed gravitational force). Just for the record, gravitational force is the weakest of the four forces. But I guess falling out of the sky knowing that doesn't help one iota. Man, I can rabbit on...

When it comes to software and web pages, never blame yourself when you can't nut stuff out. When I was first taught software development and programming we had the saying "Don't Make Me Think". That meant the user interface had to be intuitive, simple and obvious. These days that doesn't apply. LIke many things these days, cheap and nasty is the norm. Having had my ramble, I do find this forum easy enough to navigate.

The Garmin GPS units I have used in the past would show a 'cloud' of GPS points covering a diameter of maybe 3 metres, even when I was not moving. That I would expect. 2m/sec is only 7.2 kph and I would not expect a consumer quality GPS to work at that speed. Maybe some fudging with software might help. It can get pretty messy when things like 'Kalman' filters etc. are introduced into the works. That stuff makes my brain hurt. Some GPS unit stop recording when the speed is below some minimum value.

Camera on every GPS satellite?

I did a course 'engineering aspects of GPS' at work some 15 years ago. No mention of using doppler shift at all. (Not to say methods haven't changed!) It did mention the math, which I have used in my own GPS software. Included are the two functions using the horrid math needed to calculate range and bearing. Yes, with one antenna you need to move before a direction can be determined. The speed is determined by the time taken between the two points. private double CalcBrg(double lat1, double lon1, double lat2, double lon2) { lat1 = lat1 * Math.PI / 180; lat2 = lat2 * Math.PI / 180; double dlon = (lon2 - lon1) * Math.PI / 180; double y = Math.Sin(dlon) * Math.Cos(lat2); double x = Math.Cos(lat1) * Math.Sin(lat2) - Math.Sin(lat1) * Math.Cos(lat2) * Math.Cos(dlon); double hdg = Math.Atan2(y, x) * 180 / Math.PI; return (hdg + 360) % 360; } private double CalculateRange(double lat1, double lon1, double lat2, double lon2) { return 6371 * (Math.Acos(Math.Cos(ToRad(90 - lat1)) * Math.Cos(ToRad(90 - lat2)) + Math.Sin(ToRad(90 - lat1)) * Math.Sin(ToRad(90 - lat2)) * Math.Cos(ToRad(lon1 - lon2)))) * 0.54; // nm } Those familiar with math and programming in C, C++, C# or Java will benefit from looking at the code.

We don't make stuff anymore. It's all off the shelf stuff and most from overseas. Sad, so very sad...

this is an interesting read. We're dicking around with this sort of stuff at work. https://phys.org/news/2018-11-quantum-compass-satellites.html

I had to leave school before year 12 because back then (early 70s) one could only become an apprentice if they were under 18. I think strangling a teacher played a part as well.

"A mind that's week and a back that's strong" should read "A mind that's weak and a back that's strong". But who cares anymore?

My other interests include electronics and computers. Spent the last 40 plus years in the industry. When I retire I'll dabble in chemical engineering and experiment with converting alcohol into urine.

Would be nice to know what was actually the problem. Booze, drugs, fatigue. Old age?

I work with quite a few from who come from India and Pakistan. Some of them say that the corruption is so bad back home that they are terrified of flying in their home lands. Much the same in many African countries apparently. I have also heard the medical profession has similar problems.

The %^$##@ CEO could take a pay cut.

Stupid is as stupid does. (I think that's the saying...)

Ten news at five reports teenage pilot and 70 yo grand father involved in the incident. Apparently the controls went 'haywire'.

70 yo pilot + teenage passenger I think. I do wonder what it was like weather wise.

In the old days before email, Aussie post would have truck loads of mail to deliver and thus be able to make a dollar. Now, can you really expect a truck to drive across the country every day with two parcels and a letter? They wait days, weeks, months before the truck is full. When somebody thinks of a way to deliver parcels via email, there will be no postal service at all. Imagine it, you order your bottle of stay-hard cream from Russia and thirty seconds later "woof!" there it is in your house, transported by the latest "Quantum Mechanics Incorporated" matter transfer device. Can hardly wait...

House call charges are a killer. Me, I work for the man but don't get out of bed for less than $50 an hour.

When I was learning to fly back in the early eighties, my instructor (upon arriving in the circuit) covered the panel and said "You can fly the circuit on sound and attitude". He kept saying that if I kept the horizon in the correct place on the wind-screen and the throttle about right then speed and descent would follow. If I kept the runway in the right place then I'd land okay. He was right but boy oh boy, I don't think I could do it these days. He could see the instruments and did mention that I was faster than normal until crossing the fence then got a bit slow.

When in high school a teacher asked the students what they would like to be when they left school. I said I was keen on electronics or biology. The teacher laughed, the class laughed. God bless the 70s.

Maybe folks should include in their posts what qualifications, experience and credentials they have to make some of their weird and amazing claims. A farmer for instance shouldn't make bold claims about the effects of missile strikes or burning skyscrapers. It's embarrassing.

Please please please tell me you do not doubt that planes crashed into the twin towers.

After 20 years dealing with RAAF pilots I'm under the impression that maneuvering is not at the top of the list when it comes to attributes of our jets because they don't get into 'dog fights'. The 'fire and forget' missile saw to that. However, I'm easily confused as I use a comb to eat my cereal from a shoe....