Europa-List Digest Archive

Tue 03/30/21


Total Messages Posted: 8



Today's Message Index:
----------------------
 
     1. 12:00 AM - Re: Vents (BobD)
     2. 12:59 AM - Re: Vents (John Wighton)
     3. 04:40 AM - Re: Re: Vents (Bud Yerly)
     4. 05:08 AM - Re: Re: Vents (GTH)
     5. 05:55 AM - Re: Europa pitot tube piping and connections (Chris Callicott)
     6. 08:39 AM - Re: Vents (Remi Guerner)
     7. 01:09 PM - Re: Vents (Patrick Tunney)
     8. 03:05 PM - Re: Vents (Griffo)
 
 
 


Message 1


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    Time: 12:00:07 AM PST US
    Subject: Re: Vents
    From: "BobD" <rjdawson14@gmail.com>
    Bud Yerly's excellent paper on Cockpit Ventilation has been added to the repository of his articles on the Europa Club website. https://www.theeuropaclub.org/building/the-bud-yerly-notes BobD Treasurer The Europa Club -------- Bob Dawson Europa XS TG || 912 ULS || G-NHRJ || Dynon Skyview || PilotAware || SmartAss3 Read this topic online here: http://forums.matronics.com/viewtopic.php?p=501153#501153


    Message 2


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    Time: 12:59:29 AM PST US
    Subject: Re: Vents
    From: "John Wighton" <john@wighton.net>
    This is the sketch of the vent position. The red boundary is the recommended zone. The yellow boundary is generally considered too far back. -------- John Wighton Europa XS trigear G-IPOD Read this topic online here: http://forums.matronics.com/viewtopic.php?p=501154#501154 Attachments: http://forums.matronics.com//files/proposed_position_of_vent_410.jpg


    Message 3


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    Time: 04:40:16 AM PST US
    From: Bud Yerly <budyerly@msn.com>
    Subject: Re: Vents
    Griff, NO, I did not address the noise level. With headsets, addressing noise is a function of mic settings, air blast direction, ANR vs non, engine type and exhaust, propeller type and airspeed. Anything allowing wind blast into the cockpit is going to make noise. Those with NACA vents down by the leg or below the cruck of the knee won't hear much. Those with piping from the rear (tail fin) up to the cockpit won't hear (or feel) much either. The ultimate vents in my windows can be heard with non ANR headsets slightly when directed at the face. The door style intake tends to be noisier than the ultimate style. The in the glass hinged door is awful if placed near the face (about half way back on the door). So not much help really. I am normally more concerned with the engine and prop noise. I find the two blade props (older Whirlwind hydraulic, Sensenich blades in the Airmaster AP420) to be noisier due to the wide chord power pulses hitting the screen. The windscreen in some planes acts like a drum skin so prop noise is noticeable. Exhaust of a Jabiru or Rotax 912 series exited under the belly is noisy also. Survival from heat stroke in the cockpit in summer means more to me than db level of the vent. Just an opinion. Bud Yerly -----Original Message----- From: owner-europa-list-server@matronics.com <owner-europa-list-server@matronics.com> On Behalf Of Griffo Sent: Monday, March 29, 2021 9:53 PM Subject: Europa-List: Re: Vents Bud: I may have missed it but did you address wind noise ? I have always been concerned about "things" that project into high speed air. Paul: Yes please, on the offer of photos. -------- 46 Read this topic online here: http://forums.matronics.com/viewtopic.php?p=501151#501151


    Message 4


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    Time: 05:08:42 AM PST US
    Subject: Re: Vents
    From: GTH <gilles.thesee@free.fr>
    Le 28/03/2021 19:16, Bud Yerly a crit: > I've had many discussions over the years on cockpit ventilation and I summarized them in a pdf for you guys to look at. I'm always interested in how to make things work. Bud and all, Most interesting document, congratulations! Just one point, I'm of the opinion that the Rotax engines generate largely enough heat to make a functional heating. Remember a reciprocating engine rejects about as much heat energy as mechanical output on the prop shaft. That's a lot of calories (or BTUs) The key point is having a sufficient flow of sufficiently hot air. It only works with a proper cooling air nozzle behind the radiator(s) so hot air is under pressure. Here is an example of such a cockpit heating system, with a very satisfactory efficiency. http://contrails.free.fr/cellule_chauffage_en.php Easily adaptable to an Europa. FWIW -- Best regards, Gilles http://contrails.free.fr http://lapierre.skunkworks.free.fr


    Message 5


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    Time: 05:55:23 AM PST US
    Subject: Re: Europa pitot tube piping and connections
    From: "Chris Callicott" <c.callicott1@btinternet.com>
    A very belated thanks for your reply Kevin. Problem now sorted. Test flight very soon! Chris Read this topic online here: http://forums.matronics.com/viewtopic.php?p=501157#501157


    Message 6


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    Time: 08:39:31 AM PST US
    Subject: Re: Vents
    From: "Remi Guerner" <air.guerner@orange.fr>
    The attached pictures illustrates what I did to improve the original Naca vents on my Europa. Works very well. For details read my article in EF84. Remi Read this topic online here: http://forums.matronics.com/viewtopic.php?p=501158#501158 Attachments: http://forums.matronics.com//files/pic7_passenger_vent_184.jpg http://forums.matronics.com//files/pic5_passenger_conduit_installed_151.jpg


    Message 7


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    Time: 01:09:07 PM PST US
    Subject: Re: Vents
    From: "Patrick Tunney" <p1tun@yahoo.co.uk>
    Many thanks Steve The location is pretty much in line with my thinking and also comments from other owners i have spoke to that felt the vents needed to be higher than the europa reference position. Regards Pat Read this topic online here: http://forums.matronics.com/viewtopic.php?p=501161#501161


    Message 8


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    Time: 03:05:06 PM PST US
    Subject: Re: Vents
    From: "Griffo" <scangriffin@bigpond.com.au>
    Hi Bus, Thank you for your "noise" response - very much as I expected. I have both ANR /passive headsets, however following the KISS principals, I prefer the passive. Where practical will try for cockpit noise reduction & treat the disease, not just the symptoms) With regard to your prop/engine noise comments - I am hoping to have more experience in a Europa shortly - to date most of my LSA experience has been in a Rotax 912 ULS motivated ATEC Zephyr, using a 2 blade Fiti (ground adjustable) prop. Aircraft noise external/internal was very low - inflight, cockpit conversation, without headsets, was quite easy. I fitted an automotive security siren to alert my family when I was passing overhead. I appreciate differences in aircraft construction/design will effect noise generation and thus may not be applicable to another. -------- 46 Read this topic online here: http://forums.matronics.com/viewtopic.php?p=501162#501162




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