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#31
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"H.J." wrote in message
... Actually getting a pilot license isn't any harder than getting Microsoft Certified (MCSE), or getting a real estate license. (speaking effort-wise and time-wise) [snip] I spent *QUITE* a bit more time, money & effort getting my ASEL than I did my MCSD. Plus, I've never known anyone who got killed when a program didn't compile correctly. Airplanes can kill you quick, if you don't stay ahead of the game. Of course my programs have been know to "stall" occasionally..... |
#32
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In article ,
"Peter Duniho" wrote: By that reasoning, there should be very few people driving cars, given the number of people killed on the road. Why do you say that? Automobiles kill a much smaller percentage of the participants than aviation does. You don't generally hear about percentages - just raw numbers. In terms of raw numbers, more people are killed on the highways every year than on aircraft. The OP stated that if flying killed fewer people, then more people would fly. My point was that by that reasoning, there should be very few people driving cars given the large number of crashes and automobile-related deaths every year. -- Larry Fransson Aviation software for Mac OS X! http://www.subcritical.com |
#33
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"Larry Fransson" wrote in message
... You don't generally hear about percentages - just raw numbers. In terms of raw numbers, more people are killed on the highways every year than on aircraft. So what? Most people have no idea what the raw numbers are. In fact, most people have no idea what ANY of the numbers are. All they really know is that their TV tells them that airplanes are more dangerous. It's practically coincidence that, by most measures, the TV is correct, since other than that basic generalization, the TV doesn't really understand aviation. The OP stated that if flying killed fewer people, then more people would fly. My point was that by that reasoning, there should be very few people driving cars given the large number of crashes and automobile-related deaths every year. Your reasoning is flawed. The original post may well have been incorrect, but there's no way to show that by drawing an analogy to driving. Aviation and driving are two very different activities, and it's foolish to think that if you could make one single variable (out of countless) the same in each, that the resulting behaviors would be identical. But regardless, even assuming a rational comparison of fatality rates, driving comes out way ahead of flying. People don't care how many times X happens total, they care what their chances of X happening to them is (assuming they stop to think about it at all, which they normally don't). Pete |
#34
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![]() "Chris W" wrote in message I love these alternate engine debates, I always learn something new. Anyway, it is my understanding that even with a psru some of the stress and vibration introduced by the prop will still make it to the engine. Which makes the design of the psru very critical in any auto engine conversion. In the end all these people putting all kinds of different engines on home builts can only make aviation better, eventually. -- Chris Woodhouse The torsional vibration problems are more of a problem with engines running a geared PSRU, also on ones where the converter removes the harmonic balancer. The PSRU's that use the toothed rubber drive belts have less of an issue with the vibration, because the belts seem to dampen it out. The other problem is with PSRU's that use belts or chains, and do nothing to take care of the side forces on the crankshaft. The bending of the crank at those speeds can cause bad things to happen. -- ---Jim in NC--- |
#36
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Chris W wrote in message I love these alternate engine debates, I always
learn something new. Anyway, it is my understanding that even with a psru some of the stress and vibration introduced by the prop will still make it to the engine. Which makes the design of the psru very critical in any auto engine conversion. I dunno- There's a whole lot of airboats around here with a wood prop bolted directly to the flywheel of a Chevy V-8 small-block. Airboaters aren't as finicky as pilots about taking it easy on their equipment and yet, there aren't too many airboaters stranded in the swamps. Hmmm.... D. |
#37
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In article ,
"Peter Duniho" wrote: Your reasoning is flawed. And the OP's reasoning was also flawed. So there. Nyah. -- Larry Fransson Aviation software for Mac OS X! http://www.subcritical.com |
#38
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"Larry Fransson" wrote in message
... So there. Well, I certainly can't argue with that. ![]() |
#39
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On Wed, 6 Aug 2003 19:27:55 -0400, "Morgans" post/the/group.here.net
wrote: The torsional vibration problems are more of a problem with engines running a geared PSRU, also on ones where the converter removes the harmonic balancer. The PSRU's that use the toothed rubber drive belts have less of an issue with the vibration, because the belts seem to dampen it out. The other problem is with PSRU's that use belts or chains, and do nothing to take care of the side forces on the crankshaft. The bending of the crank at those speeds can cause bad things to happen. -- ---Jim in NC--- That's taken care of by using a large bearing to support the drive cog at the outer plate of the PSRU. With the bearing, the cog drives the belt with no bending moment applied to the crank at all. However, the cog itself must be carefully dialed in to the flywheel, it must run true within a few thousandths. That's one critical adjustment, the other is to make sure that the belt is properly tensioned before flight. Once the belt is properly tensioned, it usually does not need further adjustment. There must be some slack in the belt prior to flight as the cogs heat up and expand. This tightens up the belt and can apply a lot of pressure to the bearings which, if not caught early on, can fail prematurely. With the proper slack in the belt, when the cogs heat up the belt does not tighten down too much. Not enough tension is also not a good thing. In addition, the belt drive needs to have some cooling air flowing across it. A little chin scoop like that of the P-51 Mustang works fine. Corky Scott |
#40
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![]() I find it telling, that you do not mention safety at all. On Wed, 6 Aug 2003 10:11:02 -0700, "H.J." wrote in Message-Id: : Actually getting a pilot license isn't any harder than getting Microsoft Certified (MCSE) [sic], or getting a real estate license. (speaking effort-wise and time-wise) First, getting a "pilot license" in the US is IMPOSSIBLE, as the FAA issues airman _certificates_, not licenses. Your contention, that becoming MS certified or obtaining a real estate sales agent's license requires the commensurate time and effort to become an FAA certificated airman, overlooks the medical, visual, physical and situational awareness aspects required of airmen. Additionally, real estate sales agents do not require the courage and judgement necessary for airmen. (The MSCE certificate is a meaningless joke.) There is no question, that navigating the skies requires far more of a person then filling out a pre-printed Offer to Purchase form. Restricting your argument to time and effort considerations exclusively, intentionally overlooks the unique skills demanded of an airman, and belies the unreasonable nature of the views you express. What limits the numbers of new pilots is the insane cost. True, the cost of training and aircraft operation does tend to prevent many of those who desire to fly from becoming certificated. But somehow 600,000 of us have managed to find the means to obtain a certificate. Those individuals, whose hearts truly demand they take to the skies, find a way. Those dilettantes who lack the responsibility/maturity and dedication to motivate them, complain about the price of civil aviation operation as the reason for their lack of admission to plying the heavens. So those who will become an asset to our ranks succeed in obtaining an airmans certificate; others don't. If the door to personal aviation could truly be opened with money ALONE, we would see many more JFK, Jr. types (wealthy dilettantes) among our ranks. Thankfully that is not the case. Guys would buy planes like they buy Harleys if the price of ownership wasn't so high. You say that like it would be a good thing® for typical empty-headed, dare-devil, types to take to the nation's skies; I couldn't disagree more. Think of usenet before the likes of AOL opened the door to the hoards of general masses, and diluted its intellectual content with uninformed participants. AOL enticed largely unqualified people into subscribing to their exploitative service by reducing the initial price of admission to zero. Formerly, it was necessary for a user desirous of participating in usenet discussions to acquire the requisite skills and contacts to administrate a UNIX based news-feed. This tended to limit participants to the technically savvy, literate users who possessed the requisite skills and dedication. The exceptions were college freshmen who annually decreased the usenet signal to noise ratio; but at least they were literate. Now usenet is awash in pornography, guerrilla marketing, and generally unenlightened content. The "quick-buck artist" rushes in to exploit any otherwise formerly restricted situation, to fill their pockets at the expense of eternally overwhelming it. In the case of aviation, that would result in many deaths. It seems like the guys who have 'made' it into aviation are sort of numbed down, or brainwashed or something. That sounds like the cry of one unable or unwilling to so dedicate himself to aviation as to be an asset to it. One does not "make it into aviation." One fulfills the training requirements, and demonstrates his aviation skills to a pilot-examiner, and his physical state to a medical examiner, and is found either qualified or unqualified. Aviation is not like jumping on a dirt-bike and decimating the fragile desert ecology. Aviation may be recreational, but never trifling frivolity. Aviation requires an airman to responsibly exercise his skills. If pilot training fails to intensify an applicant's attitude toward safety and responsibility in aircraft operation, it is flawed. Aviation is a way of life, not merely fun. They are forced to abide by a very complicated system of laws and expenses that dont make sense. There is no question that the federal aviation regulations make sense. I, for one, would not care to share the skies with those who fail to comprehend the logic of aviation regulations. Those who fail to appreciate the logic of federal aviation regulations should, without question, remain ground bound (much as those who are unable to comprehend the simple arcana of MS Outlook should be prevented from usenet participation). But since it's always been that way, they just accept it. Actually, it hasn't "always been that way." In the early days of aviation, safety suffered due to ignorance and a lack of standards. Thankfully, standards evolved to prevent the repetition of unsafe practices. Then after they land and drive out of the airport in their triple-airbag-26-cpu-antilock-brake-digitally-monitored-emission-active- suspension-awd-1.60-per-gallon-fuel-sipping-$30,000-window-sticker-SUV, they dont even realize the irony of it. Aircraft are not automobiles. Anyone who brings a highway mentality to aviation soon learns that. When an automotive system fails, the motorist pulls over to the side of the road and calls AAA. Airmen are not afforded that convenience; airplane system failures are more often than not fatal. How many inappropriately licensed motorists daily exhaust their fuel supplies on the highway; what would happen if they were flying over mountainous terrain instead? Piloting an aircraft is so much more unforgiving of human failure than driving an automobile, as to make them incomparable. (Imagine driving in zero visibility for instance.) They even take place in different dimensions. Because of weight considerations, aircraft cannot be built as robust as automobiles. It is the rare "bugsmasher" that even boasts an air conditioning system comparable to those installed in nearly all automobiles. The necessity to build aircraft as light as possible results in many innovations being inappropriate for use in them. Aircraft are not automobiles. Their similarity ends at their utility in transporting people to destinations. Beyond that function, they are fundamentally and irrefutably dispirit. To fail to discern their differences is to reveal a fundamental lack of understanding of the issues. The strange part is, the pilots etc who could benefit the most from 'thinking outside of the box' are here in this group defending $2.62/gal gas Autogas is available for aviation powerplants. Those pilots who choose to ignore the safety benefits of aviation fuel (for lack of accessability or economic reasons) can obtain a certificate permitting its use in most aviation engines. and $50K junk-heap-aircraft as if their pride depends on it or something. The age of an aircraft does not qualify it to be regarded as a junk-heap. There are no "junk-heap-aircraft" flying with valid Airworthiness Certificates. Unlike automobiles, aircraft are annually inspected by government certificated inspectors, and restored to acceptable condition, or grounded. The pilot orgs seem to be the same. They comprehend the issues. I heard Rutan once mention that if he could have seen into the future from the 1960's and seen the current state of aviation in the 1990's - basically the same old technology and performance born of 1960s, he would have thought that some nuclear holocost had occured that had frozen progress in it's tracks. There is no question that Mr. Rutan is an innovative genius, but I would dearly like to see his solutions to providing aviation operation to the masses. NASA's Small Aircraft Transportation System is the government's solution for the futu http://sats.nasa.gov/ http://www.sdsmt.edu/space/SATSMay2000MeetingInfo.htm http://sats.erau.edu/images.html Perhaps that is what Mr Rutan had in mind. There's no (technological) reason we couldn't have $35,000 200 kt. Auto-fuel-burning composite aircraft with fully digital glass cockpits RIGHT NOW! With the exception of the price you mention, that hypothetical aircraft is already in the air. The cost of development, manufacture, and compliance with federal safety standards, together with the limited market, conspire to drive the cost of aircraft significantly beyond $35,000. The market for $35,000 automobiles in the US is several orders of magnitude larger than that for aircraft, as a result of the dearth of qualified pilots, and the necessity of more stringent aviation safety standards. This limited market prevents the development and safety costs of aircraft from being amortized over a sufficient number units to permit the profitable sale of aircraft at that price. Are you suggesting, that millions of new aircraft with reduced safety standards should take to the nation's skies annually? Jim Bede sold that notion to the nation in the early '70s. Fortunately for all of us, the mass market BD-5 was largely a failure, because it caused so many deaths. So that means the reason aviation is an overpriced, antique junk club is because of the PILOTS themselves who protect this outdated aviation environment Civil aviation may not be perfect, but to date, better solutions have not surfaced. by telling me that 'Fuel is cheaper than milk or european fuel so it's ok.' Those pilots who present those arguments to you fail to discern the true causes. Or blaming ecomomies-of-scale etc. Those who fail to discern the role of economy-of-scale in price reduction, lack fundamental understanding of manufacturing realities. So while necessary safety concerns and a restricted market cause the price of aviation to be well beyond that of automobile operation, it is the lack of proposed aviation solutions that possess comparable or superior safety characteristics to those available today, that retard the advancement of aviation accessability for the masses. -- Irrational beliefs ultimately lead to irrational acts. -- Larry Dighera, |
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