pylon500

Bankstown and or Kingsford Smith? Never heard of those airfoils, now I'm confused.

So will you still want to fly a Jabiru after the Technam?

Basically what I was getting at. I was going to ad some diagrams (but went and had tea instead) Here ya go.....; The bottom surface of the old Clark Y section can have a negative angle (I know, irrelevant) while producing lift, in fact at high speeds even the chord line can be at a negative AoA, and still producing lift! The above polar is for some variations of the Clark Y section, hence the different colour plots. (I just pinched this off the net without reading too much..) The horizontal plot line above is AoA, while the vertical line is the lift coefficient. You can see that at 0° AoA, the wing is still producing about 45% of it's capable lift. Yes, the aircraft would be descending, but it IS flying, not plummeting out of the sky. Most gliders.....

That was a good start. It seemed pointless trying to stop religious fanatics when you had one in office.. I think the world has almost grown up to the stage we no longer need to have a society run by unaccountable groups preaching unquantifiable beliefs under the fear of retribution of the soul (?), while dangling the promise (greed) of eternal satisfaction, all the while holding the masses down a level to stop them thinking for themselves. I'm talking about religion FT.... IS is about five hundred years too late, which considering that I-slam was only invented about eight hundred (?) years ago, means they were never in the running. Yes, I know there are still lots of them, but there's just as many Hindus, almost as many Catholics, and neither of them are trying for world domination.

Actually it's interesting that you say that. I usually like watching the high tech stuff you find on the NASA website/youtube, until I came across this one, and started to think, 'Whoa, hang on a minute, what's that?'; < Actually some of the discussion in the comments started to sound a lot like here.. And if you haven't/don't read the comments, my take on it all was, 'They have discovered the benefits of aspect ratio'.

So FT, you're telling us the problem (which we all know by the way). but what are your thoughts on sorting it out? You don't want the 'Fascists' (you mean the liberal party/coalition?) to sort it out, even though statistically they are the only party that have ever improved Australia? They're the ones that make life better for the 'working' class who then get threatened with more taxes, (needed to pay for the good life) so they vote for the socialist (I'm in a union and don't want to work) party again, who promise tax cuts, hand-outs and so, until the country goes broke again. You need to remember that most of the 'PC' people that are screwing up our ability to be ourselves and protect our way of life, all generally from the bottom end of the academia, studying the arts, sociology, community, and so on. Not real tertiary studies like science, medicine, engineering, chemistry, physics, etc. The 'PC' peoples favorite studies are usually written by Marx, Tolstoy, Lenin and the like. The problem is that Communism (their ultimate goal) does not really work, it's a myth. Show me a communist country, and I'll show you a country that is really socialist to enforce it's communism, and currently they're ALL falling apart and looking toward democracy. Remember, USA is not a democracy, it's Capitalist, which is the antithesis of communism, they're each end of the scale. Oh dear, I've run off at a bit of a rant. Anyway, what's needed now is for government (I don't care which side) to grow a set of BALLS and start making real decisions for Australia, screw the rest of the PC world, minorities need to remain just that, minorities! By the same token, I will have to grant you that you're mate Putin is getting the right idea, collateral damage is just a fact of life.

There's a lot of merit in this concept. Everyone looks to wind tunnel testing of airfoils to crunch out figures of lift coefficients and drag, etc, but the problem I have with this is that the air in a wind tunnel is moving! This air has energy, and can create effects caused by how it interacts around things. In real life, the air is stationary, the wing travels through it, and for the split second that the wing and air interact, ALL this lift and drag and stuff is produced? What the ?

Well that's interesting. You just contradicted yourself. The concept of mass displacement relies on moving (or changing the direction of) mass to use (as you said) Newton's laws. The change of direction is caused by the airflow turning around the curve of the wing, or deflecting off the lower side, if you believe that theory. There would be no need for any pressure changes to occur, to uphold this theory. On the other hand, if it's all done with pressure changes as generated by making air travel over dissimilar distances, then lift can be created without the need of angle of attack. If you look at most of the airfoil data around, you will find lift still being generated by sections running right down to NEGATIVE angles of attack! Now I'm not going to say it's only ONE theory that's involved in the generation of lift, I believe that it is a combination of ALL factors that make planes fly. Of course, none of these theories apply to helicopters, they just rely on the fact they are so ugly, the Earth repels them. [/i]

There's lots of theories on how planes fly, and while the video may have it's merits, your comments have a couple of obvious flaws. CAA, FAA, CASA and so on, are in the business of proving planes DON'T fly, and spend most of their time making sure this happens! On the other hand, Boeing, Airbus, Beech, Piper, Cessna, etc know the other theory that it is really MONEY that makes planes fly, (something about how money continually inflates, so it rises naturally..?), that's why they take some much of it.

Ah, you mean all those nice PC people that think the Western world should help out all the less fortunate (developed) people, allowing them to come to more advanced communities to live in peace and harmony with us...? Some of them have been going to Belgium for that 'better' life, here's one showing his gratitude for the exposure to the freedom of open minded democratic society; <https://www.youtube.com/watch?v=6OyoCDnqbg8

I would have thought a quicker answered question would be, 'which taildragger drivers HAVEN'T ground looped?' It's a bit like retractables, there's those that have, and those that are going to... I was lucky, I did it in a Blanik. Oh, and the ground loops?..., 912 lightwing, a couple of times. Usually from being a bit lax with a pilot converting to the GR912 from the GR582 (you've got to try pretty hard to ground loop a GR582).

Sounds like you're trying to own two or three trike under one rego?

Why couldn't you put together an assortment of parts for a two seater, and register it as a 19.xxxx? Conversely, what rules do HGFA use to register trikes?

Have just returned to Taree from a weekend of relatives and late nights (no news), to find this. I've only met Ross a couple of times, but after knowing each other here at Rec'flying, the first time was like meeting an old mate. A kindred spirit for flying and seaplane maintenance, and fellow Lightwing aficionado. Now, totally gutted, a hollow feeling within, and yet.. In three and a half thousand hours, and ninety odd ultralights, yes, I've had problems and I'm guilty of turning back at least a couple of times. It's that split second decision you have to make, and even with years of telling yourself and your students 'don't turn back', you know you can describe that point from where you can turn back, and even demonstrate it! BUT, it only takes a few minor parameter changes to lead you into the wrong decision. I look back on my turn backs, and always think, WHY? As mentioned before, I don't think Ross would want any of us to step away from flying after this, but instead look closer at our currency, planning and environment (airstrip surrounds and the like), and keep practicing, not just complacently joy riding. RIP Ross, and condolences to family.

SAABSKI?

All depends on the helicopter, if it was that big bugger in the background, I'm surprised it didn't blow away a few hangars as well!

I'd be wary of balloons... Regularly used to go for dunny rolls, then figured maybe balloons would go down slower, typical dunny roll goes down around 600fpm! (until unravelled) Tossed out a balloon one time, it bounced of the wing twice, could swear it came through the prop arc once, but finally I hit it with the prop, AND IT DAMN NEAR STOPPED THE ENGINE! This was in my old 503 powered Cricket. Hint; Don't streamer cut using super soft multi ply toilet paper, it doesn't break, it just sticks to everything!

Well I'll be buged, bugded, bugled, buggered! Yah lerns som'tin every day. Thanks for that...

Well I'll be buged, bugded, bugled, buggered! Yah lerns som'tin every day. Thanks for that...

Once the medically unfit ex-GA pilots convince RAAus / CASA to go to 750kg, and we start registering all the ancient corrosion clunkers with their dinosaur engines, the Ultralight, Recreational, Small GA aircraft will have all the problems, costs and governmental interference that the former GA pilots were trying to get away from. Naturally the next thing they will want will be controlled airspace, night VMC and IFR. Might as well create a commercial endorsement and start carrying a paying passenger (or two after not too long) The only good thing is that it will leave an opening to restart an Ultralight movement. ps, anyone know how to get that 'strike through' to work?

Once the medically unfit ex-GA pilots convince RAAus / CASA to go to 750kg, and we start registering all the ancient corrosion clunkers with their dinosaur engines, the Ultralight, Recreational, Small GA aircraft will have all the problems, costs and governmental interference that the former GA pilots were trying to get away from. Naturally the next thing they will want will be controlled airspace, night VMC and IFR. Might as well create a commercial endorsement and start carrying a paying passenger (or two after not too long) The only good thing is that it will leave an opening to restart an Ultralight movement. ps, anyone know how to get that 'strike through' to work?

Interesting, even complete strangers know the name of your dog, at least they call his name every time he gets out....

Interesting observations; •Unlike most crashed/crashing choppers, this one avoided doing the chicken dance for quite a while, just spinning stably on the ground, •The fuel system, rotor head and transmission seemed to take some abuse and keep going, •The first camera man seemed to sense something even while the pilot was still trying to land, as you can see him get behind a wall and even start heading further away just before the tail rotor strike, •It looks like the pilot got thrown out just after impact (and killed by the rotating chopper), and the passenger was either incapacitated or did not know how to shut down the engine, •Unlike most chopper impacts, the tailboom stayed attached for a long time, it's separation finally bringing the crisis to an end. The above video shows how far the wreckage travelled before finally stopping.

No, it's the all new TRON Zodiac

Without actually trolling all the rule changes from the early eighties, I would say that for every Kilo extra (above our original 'ultralight' status) that we ask for, it adds another 'hoop' to the training, certifying, building, operating rules from what we had back then. On the other hand, if we are going to divorce ourselves from ultralights and actually become 'sporting and recreational pilots/builders, where's our aerobatic ratings, rotary wing, multi engine and mini gas turbines?