Hi Robert It wasn't a gratuitous statement honestly. I was just trying to show that the relationship between the Nimbus and the equivalent age 15 Metre hasn't changed. The ASW20 is from the same era as the Nimbus 2 and the ASG29 is the same era as the Nimbus 4. Plus Open Class is just that, there is nothing preventing an ASW20 competing in Open Class then or now.
The problem facing the handicappers is that the Nimbus 2 technology is over 40 years old (1971 first production Nimbus 2) and the ASG29/JS1 is state of the art 21st Century aerodynamics technology. An awful lot of advancement has occurred in aerodynamics and composite technology in 40 years. Add to that the condition of the airframe, wing surface, seals, flexibility, weight and so on, you can begin to see the scale of the problem one is presenting to the handicappers. It is the equivalent of trying to make Jack Brabham's 1971 Formula 1 race car competitive with the current Red Bull F1 race car, it just can't be done effectively. Nothing personal or derogatory to yourself or the beautiful Nimbus 2 aircraft is intended at all. Best regards, ROSS From: aus-soaring-boun...@lists.internode.on.net [mailto:aus-soaring-boun...@lists.internode.on.net] On Behalf Of Robert Hart Sent: Thursday, 18 August 2011 8:46 PM To: Ross McLean; Soaring in Australia Subject: Re: [Aus-soaring] Handicaps On 18/08/11 11:26, Ross McLean wrote: Hi Robert I note that the Nimbus 2 has a handicap equivalent to an ASW20. The Nimbus 4DM has the same handicap as an ASG29. Ross I haven't noticed many ASW20's flying in open class, so I really don't see the relevance of that comment. What I do see is that there is (apparently) only 1% difference between the 1960's aerodynamics of the Nimbus 2 and the 1980's aerodynamics of the ASH26 (even allowing for the significant difference in span). Furthermore, the Duo DIscus (again 1980's aerodynamic technology) now has a 2% advantage over a Nimbus 2 (and virtually the same span). I truly do not understand. I would REALLY love to see how these are calculated - is the formula published? -- Robert Hart ha...@interweft.com.au +61 (0)438 385 533 http://www.hart.wattle.id.au
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