Europa-List Digest Archive

Thu 04/06/23


Total Messages Posted: 2



Today's Message Index:
----------------------
 
     1. 12:11 PM - Tri gear leg assembly (Paul McAllister)
     2. 04:53 PM - Re: the Obsidian Files - So Much Noise!!! (Area-51)
 
 
 


Message 1


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    Time: 12:11:54 PM PST US
    From: Paul McAllister <paul.the.aviator@gmail.com>
    Subject: Tri gear leg assembly
    Hello everyone, I am in the midst of converting my mono to a tri gear. The manual talks about installing the legs and then proceeding with the installation of the wheel assembly. Is there any reason why I cannot assemble all of the wheel & brake components and then install the leg into the sockets? Thanks, Paul


    Message 2


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    Time: 04:53:55 PM PST US
    Subject: Re: the Obsidian Files - So Much Noise!!!
    From: "Area-51" <goldsteinindustrial@gmail.com>
    Episode 82 of "shut that noise up" Upon the eve of Easter, while out looking out over the distant full moon lit pastures for a pink and white rabbit an idea emerged instead... With feverish reckless abandon i quickly searched through some 12,000 images of my electronic memory and found photos of 181's CKT exhaust. Rushing back to the table with assumptions in mind the computer was turned on and the images again reviewed,.. using the burn markings of the CKT muffler a model of what could possibly be a similar internal structure, three absorber sections with a central expansion chamber, was modelled and then sent through the acoustic analyser with results being spat out shortly after. What was found??? The CKT absorber/reflector style muffler provided better overall attenuation than the factory Rotax reflector style unit; broader low range, medium, and high range attenuation. On a broadband level the CKT styled unit provided on average 4db greater attenuation than the Rotax. Low range was shown to be affective from 50Hz upwards where as the Rotax offers none until 320Hz. Peak attenuation levels on the CKT styled unit happened between 2000Hz and 3200Hz where the Rotax is 450Hz to 4000Hz with most attenuation taking place within this band. So the CKT style Absorber/Reflector muffler is more quiet on a broadband basis and works best at attenuating more mid-field frequencies than the factory Rotax unit. Happy Easter to all... Read this topic online here: http://forums.matronics.com/viewtopic.php?p=510600#510600 Attachments: http://forums.matronics.com//files/9440bb11_1048_4ad5_8038_ce7f92e944d8_128.jpeg http://forums.matronics.com//files/73a548a8_2223_4831_a435_ac0816303864_404.jpeg http://forums.matronics.com//files/0864e426_4dd6_4e78_b929_963b2a6c799d_763.jpeg




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