Europa-List Digest Archive

Tue 09/20/11


Total Messages Posted: 2



Today's Message Index:
----------------------
 
     1. 01:29 AM - Re: Door closed switches (Gavin and Anne Lee)
     2. 09:17 AM - Re: Pitot Static  (EMAproducts@aol.com)
 
 
 


Message 1


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    Time: 01:29:44 AM PST US
    From: "Gavin and Anne Lee" <gavanne@iconz.co.nz>
    Subject: Door closed switches
    Hi Tony Yes I use a door open light on the instrument panel which is operated by the rear shoot bolts on the doors, either shoot bolt when it is not in place will activate the light. I just used common micro switches from Dick Smith (the lever type) and once I had the doors fitted just bonded them in place so that the shoot bolt was activating the switch, there are connections on the switch for either circuit open or closed so connect to suit, obviously want the circuit open when the door is closed. Works fine, never had a problem with them. Cheers Gavin Lee.....#355 ZK-EPA -----Original Message----- From: owner-europa-list-server@matronics.com [mailto:owner-europa-list-server@matronics.com] On Behalf Of Tony Renshaw Sent: Wednesday, 14 September 2011 12:56 a.m. Subject: Europa-List: Door closed switches --> <tonyrenshaw268@gmail.com> > Well, it's taken a long while but I seem to have my doors on. Ironically I have a worse outcome on the left door, even though I did it second. I don't think it is actually my fault that it kicks out at the back, and I am tempted to either do massage with a hot air gun but feel it might be quite a hard thing to do properly due to the U shaped internal door section. I'm actually scared to try, however I have thought when I post cure it all I might reverse things and lock in the back shoot bolt, and intentionally distort the door by leaving the front shoot bolt outside of the aircraft. Fingers crossed at 50+ degrees C it might relax enough so I get a square outcome. So, that's the grand plan but I have been reading an article Nigel Charles wrote for the LAAA regarding upgrading a panel, where he talks about warning lights for doors not closed properly. The majority may not have these but it is my luck that if I don't fit something I will lose a door. To this end therefore, I ! am requesting advice on what type of switch, and maybe where they can be sourced please. Whilst I am at it, I didn't thank those that offered advice as to what I should do to preserve my 7 year old Rotax, still in it's original box. So thanks to them, and same to anyone in advance who can offer learned wisdom re this next issue. Reg Tony Renshaw


    Message 2


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    Time: 09:17:10 AM PST US
    From: EMAproducts@aol.com
    Subject: Re: Pitot Static
    I am just a lurker on this site, but have considerable experience on location of pitot/ vanes etc below the wing . I manufacturer the RiteAngle series of AOA's, and vane location is extremely important to get a good clean airflow, which also would indicate good clean stable air into the pitot tube. My aerodynamic engineer with many years of experience told me to never locate a vane less than 4 inches from an airfoil. Where we are using a vane we strive to be 13% of the chord below the wing, which has worked on well over 100 different makes and models of aircraft with no problem. The only problems were with those who placed the vane to close to the airflow where the airflow was still "following the curve" of the airfoil~~I can think of two people who tried to out guess years of experimenting and experience. I agree 100% that 4" is marginal, especially where the vane is located on the Europa ( on those I've flown anyway.) Another factor is the actual airfoil being used and the size of the pitot tube. During tests for certification of one LSA our system was within 1 mph from stall to Vne of the aircraft, I feel primairly due to using a larger diameter pitot tube as the AOA didn't restrict the airflow into the tube, also the shape of the end of the pitot makes a difference. Put it far enoug h below the wing & use a proven pitot tube. A different subject the Static source is as important as the Pitot. Follow Europa's instructions. Elbie Mendenhall In a message dated 9/20/2011 12:07:45 A.M. Pacific Daylight Time, europa-list@matronics.com writes: Subject: Europa-List: Re: Pitot Static From: "rampil" <ira.rampil@gmail.com>




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