SEN 3322
- RIP Mario Rocca
- Performance Analysis ?
- Looking for Nelson piston kit
RIP Mario Rocca
From: Urs Schaller
RIP Mario Rocca,
Mario Rocca, a former World Champion in F1C (Taft 1979), left us after a short illness. The nicest and most agreeable person you can think of. We will never forget his smile and attention to others.
Urs
Performance Analysis ?
From:Peter Martin
Dear SEN,
I welcomed Charlie Jones’ comment in the latest SEN, essentially stating that we need to take a fact-based decision against a defined measure of performance, if we’re looking to reduce rubber weight for F1B.
To repeat my (non rhetorical) question from SEN 3290 – “I think any reduction in rubber weight should be based on competition evidence – If we want to reduce weight by nearly 17% (5/30), are we consistently getting 20% more people into comparable flyoffs and seeing 20% higher flight times?”. Since I wrote that, it’s been clarified that minimum airframe weight would stay at 200g, so overall model weight would drop by 5 grams and performance would be about 86% of existing models rather than 83%.
The last reduction in rubber weight, to 30 grams, was made in 2002, giving us over 20 years of data (notwithstanding Covid) from contests. The onus is on the new rule proposer and CIAM to present and review some facts. I think the defined measure of performance should be from a benchmark of competitions organised to international standard, namely the World Cup and World/European Championships contests. If we can see a clear trend since 2002 that the percentage of competitors in flyoffs and their flyoff times have risen by 15-20%, then we have a solid evidence-based decision. The petition can be defused by pointing to the evidence and we don’t need further controversy and arguments in our flying community. If there is no such trend, the petitioners have the strongest case and the rules stay as they are.
Peter Martin
looking for Nelson piston kit
From: Emmanuel juarez
Hello Roger, can you publish in the next SEN that I am looking for a piston kit for the Nelson 2.5 F1C engine.
my email is ej120hotmail.com thanks
emmanuel
SEN Status
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Roger Morrell