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Re: All gliders competitive all the time
| Mike | 24 Feb 2010 17:48 |
Eric said, "A small regional might decide on three classes, meaning "handicap spread": Class 1 =0.5 to .9, Class 2 = 0.91 to 1.1, Class 3 = 1.11 to 2. A big regional might go for four. National contest bands might be set by SSA each year after negotiations with the regions putting on a Nationals. Got lots of sites that want a Nationals? Set up narrow bands. Only a few? Set up wider bands."
An excellent idea!
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| Eric Greenwell | 24 Feb 2010 05:32 |
> Gliders are a classic example of excessive choice leading to high > costs. If we want 8 or more competition classes and a choice among [quoted text clipped - 8 lines] > plus a handicapped club/sports class for everything else. > I suggest that we eliminate the distortion caused by "building to class", and simply let the market figure out what kind of glider people are willing to pay for. All contest classes would be like the Club Class, and each country could pick the number of classes, and the performance spread in each, that worked best for them. No more "Meter" classes, no more Sports Class, no one design class, even no more Club Class.
A small regional might decide on three classes, meaning "handicap spread": Class 1 =0.5 to .9, Class 2 = 0.91 to 1.1, Class 3 = 1.11 to 2. A big regional might go for four. National contest bands might be set by SSA each year after negotiations with the regions putting on a Nationals. Got lots of sites that want a Nationals? Set up narrow bands. Only a few? Set up wider bands.
The manufactures would then build gliders of different sizes, performances, and costs, much like the automobile market, but every owner would know his glider was competitive in a class when he bought it, and even 20 years later, it would still be competitive in a class.
I was saying stuff like this 25 years ago. Maybe it's time has come!
 Signature Eric Greenwell - Washington State, USA (netto to net to email me)
- "Transponders in Sailplanes - Feb/2010" also ADS-B, PCAS, Flarm http://tinyurl.com/yb3xywl
- "A Guide to Self-launching Sailplane Operation Mar/2004" Much of what you need to know tinyurl.com/yfs7tnz"
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| bildan | 23 Feb 2010 17:36 |
> Soaring friends, > I called the company and confirmed it is $149,500.00 dollars for [quoted text clipped - 22 lines] > be one of the few in the world who knows what it is to soar! > John Ackerson O.D. The developers are just trying to recoup their R&D costs with high prices the 'early adopters' will pay. Electronic tech drops in price as manufacturers climb their learning curve. Bet: 5 years from now short range thermal detectors will cost < $2500.
LIDAR developers probably have little knowledge they can contribute to reducing glider production costs - that's another group of people altogether.
Gliders are a classic example of excessive choice leading to high costs. If we want 8 or more competition classes and a choice among scores of designs in each class, unit costs will be high because production runs will be short. Short production runs mean gliders are essentially hand built at high cost.
The key to reducing glider costs is to increase the number of units in a production run by reducing the number of designs we expect manufacturers to produce. A good step in that direction would be to reduce the number of competition classes. I suggest the 18M class plus a handicapped club/sports class for everything else.
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| flyingmr2 | 23 Feb 2010 15:53 |
Soaring friends, I called the company and confirmed it is $149,500.00 dollars for this wind/thermal detector. They are very aware of the sailplane community and are in the planning stages for a smaller and cheaper units for us. The sales guy said for my to stay tuned because it will be coming. It is all very exciting but overwhelmingly expensive. I have a hard enough time trying to explain to my wife the value of a $75K euros JS1 revelation dream ship a saw at the convention. I haven't even mentioned that the trailer and instruments are extra and the poor euro/dollar exchange rate. I see the great value but she is very very skeptical. As every man knows, the guy code clearly states that better-faster-nicer-cooler is always more fun! I'm sure this thermal detector at $150K would not go over well with the misses. At least the Eta guys set the bar quite high for an expensive ship and I can always use them as an example of what a really expensive ship might cost. Hey dear, this $250k ship with a thermal sensor is 75% cheaper than the million the Eta guys paid. What a deal! Maybe future technology should not be so focused on significant increases in performance but significant decreases in manufacturing cost and construction time. How many pilots might have sprung for the JS1 listed at $30-$40K which would be more similar to the cost of my car or boat and not more like my $150K house. The cost of new ships is cooling the sport and possibly a few marriages! Enough of my ranting, lets just go fly and enjoy because I feel very privileged to be one of the few in the world who knows what it is to soar! John Ackerson O.D.
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| John Cochrane | 23 Feb 2010 01:53 |
> > - 300 m range isn't all that much, OK for centering, not for locating > > a thermal > > 300M would probably deliver more than 50% of the expected benefit of a > remote thermal sensor. I agree, 300M is enough to win the worlds. Imagine f you always knew which way to turn! And people are willing to pay hundreds of thousands of dollars / euros to do that.
I wrote a "contest corner" on some thoughts about how thermal detectors will change things -- mostly for the better
http://faculty.chicagobooth.edu/john.cochrane/research/Papers/thermal_detectors.mht
John Cochrane
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| bildan | 19 Feb 2010 18:07 |
> > Can measure vertical wind aka thermal > [quoted text clipped - 13 lines] > - I couldn't find the listed price, but they suggest leasing one; > sounds rather costly... I would disagree a bit.
300M would probably deliver more than 50% of the expected benefit of a remote thermal sensor. There will be diminished returns at longer ranges since thermals will dissipate (or be later in their life cycle) by the time you could get there.
This particular unit is designed for years of service atop windmills but nonetheless indicates the underlying science is valid. Tech always gets smaller and cheaper with time. Give it a few years.
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| stephanevdv | 19 Feb 2010 17:08 |
> Can measure vertical wind aka thermal > > [catchthewindinc.com] Yes, but....
http://catchthewindinc.com/files/images/RLU_240pix_Width.png
- 300 m range isn't all that much, OK for centering, not for locating a thermal - given its form and volume, the sensor will cut your glide angle by half if you place it on your glider (and at 50 pounds, play hell with your weight and balance) - I think the vertical wind information will be hidden by the relative wind - I couldn't find the listed price, but they suggest leasing one; sounds rather costly...
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| TRKA | 19 Feb 2010 08:51 |
Can measure vertical wind aka thermal
[catchthewindinc.com]
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