Europa-List Digest Archive

Tue 02/25/14


Total Messages Posted: 3



Today's Message Index:
----------------------
 
     1. 03:55 AM - Friedrickshafen (David Joyce)
     2. 12:08 PM - Re: where to put OAT sensor? (Bud Yerly)
     3. 01:37 PM - Re: Mod 76 - Altitude Hold Autopilot (Rob Housman)
 
 
 


Message 1


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    Time: 03:55:35 AM PST US
    From: "David Joyce" <davidjoyce@doctors.org.uk>
    Subject: Friedrickshafen
    Are our Scandinavian friends planning a group descent on Friedrickshafen this year, and if so are you prepared to have others join and would you like details in the upcoming Europa Flyer? Regards, David Joyce, EC Trips Organiser


    Message 2


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    Time: 12:08:54 PM PST US
    From: "Bud Yerly" <budyerly@msn.com>
    Subject: Re: where to put OAT sensor?
    Some notes on my mistakes: OAT probe in either the 914 or radiator metal duct work needs an insulator as the ducts warm up and on the second flight and is really terrible until at altitude. If insulated, it is down right tollerable in the duct shortly after engine start. I have put them in the back of the wing fillet gap by the flap, seen them in the gap between the stab and fuselage, in the tail cone trim hole, sticking out the belly (Dynon probe style stuck out of the bottom of the aircraft clear of exhausted air), even the 912 fiberglass plenum, and they all worked. Some magnatometers require wire to the OAT to be installed (Dynon type) so plan your magnatometer and OAT sensor positions to prevent 20 feet of wire running. With the magnetometer behind the baggage bulkhead, one was put in the hole behind the flap bracket (no cover). Do plan for flap movement. Another mag was put under the seat, and the probe put under the right cheek of the passenger. It worked provided your passenger does not have an iron bottom. If you put your Dynon magnetometer in the overhead, consider an overhead vent with the OAT in it. If in a cold climate, when the duct is shut off, you get cockpit temp, so plan accordingly. Just my two cents. Bud ----- Original Message ----- From: nigel_graham@m-tecque.co.uk<mailto:nigel_graham@m-tecque.co.uk> To: europa-list@matronics.com<mailto:europa-list@matronics.com> Sent: Monday, February 24, 2014 6:43 AM Subject: Re: Europa-List: where to put OAT sensor? "nigel_graham@m-tecque.co.uk<mailto:nigel_graham@m-tecque.co.uk>" <nigel_graham@m-tecque.co.uk<mailto:nigel_graham@m-tecque.co.uk>> Ahh! wrong plenum. That makes more sense as I would expect induction air downstream of the turbo to be in the high 70's C. Thanks for the clarification. Nigel On 24/02/2014 09:16, David Joyce wrote: > <davidjoyce@doctors.org.uk<mailto:davidjoyce@doctors.org.uk>> > > Nigel, Yes I have a 914' but I am talking about the space fed > directly from a NACA inlet which gathers the air before it enters the > turbo. Like all the cowling inlets it will be pressurised by the > slipstream/propwash No doubt post turbo the temperature will be higher > still - which is why 914s don't need carb icing protection. > Regards, David > > On Sun, 23 Feb 2014 23:29:44 +0000 > "nigel_graham@m-tecque.co.uk<mailto:nigel_graham@m-tecque.co.uk>" <nigel_graham@m-tecque.co.uk<mailto:nigel_graham@m-tecque.co.uk>> wrote: "nigel_graham@m-tecque.co.uk<mailto:nigel_graham@m-tecque.co.uk>" >> <nigel_graham@m-tecque.co.uk<mailto:nigel_graham@m-tecque.co.uk>> >> >> If I remember correctly, isn't 'DJ powered by a 914? If so, the >> plenum will be fed with heat sinked (sunk?) air fresh from a >> blisteringly hot turbo. Once Mr. Boyle has added his two cents, I'm >> surprised that the difference between plenum and OAT is only 8c! >> >> Nigel >> >> On 23/02/2014 12:04, David Joyce wrote: >>> <davidjoyce@doctors.org.uk<mailto:davidjoyce@doctors.org.uk>> >>> >>> >>> Alan & rowland, problem with anywhere subject to ram air >>> pressurization is that it will give an appreciably higher temp than >>> true OAT.(Boyle & his law). I have an airbox temp sensor in my air >>> plenum and also an OAT sensor in the wing root just in front of the >>> flap control slot and the two give significantly different temps >>> once the plane is flying, if I remember rightly by something like >>> 8C. Regards, David Joyce, G-XSDJ >>> >> >> >> Un/Subscription, >> Forums! >> Admin. >> >> >> > > > > > http://www.matronics.com/Navigator?Europa-List<http://www.matronics.com/N avigator?Europa-List> http://www.matronics.com/contribution<http://www.matronics.com/contributi on>


    Message 3


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    Time: 01:37:12 PM PST US
    From: "Rob Housman" <rob@hyperion-ef.com>
    Subject: Mod 76 - Altitude Hold Autopilot
    UPDATE: Before removing CS10/2 I tried once more to get the offending nut onto the bolt with the assistance of my son's slightly smaller hands. Success! Once the nut was aligned with the bolt I could turn the bolt with one finger (through the hole in the seat back) just enough to keep the nut it in place. Then with a box wrench on the nut (again through the seat back), and access from the starboard side, used a socket on a very long assembly of extensions to turn the bolt until everything was tight. Best regards, Rob Housman Irvine, California Europa XS Rotax 914 S/N A070 Airframe complete Avionics in progress From: owner-europa-list-server@matronics.com [mailto:owner-europa-list-server@matronics.com] On Behalf Of Rob Housman Sent: Monday, February 24, 2014 8:48 AM Subject: RE: Europa-List: Mod 76 - Altitude Hold Autopilot Nigel: What you describe is almost exactly how I connected the port and starboard pitch push rods to CS10/2, the only difference being that I did not need to magnetize the socket. Both of these connections are relatively easy to reach but that @#$%^&* third horn on CS10/2 is (so far) not within my reach with either fingers or tools. Ron: My problem is access. My combination of universal joints, extensions and sockets will not clear the obstructions which include the support bracket holding CS10/2 and the aileron bell crank where it mounts to the end of CS05 torque tube. In other words, I cannot manage to get the tools to align coaxially with the bolt even if I could get the nut onto the bolt manually, which I can't. Next up: Unless someone presents a simpler solution, I'll remove CS10/2 and attach only the rod end to it and then after CS10/2 is reinstalled, attempt to thread the servo push rod onto the rod end already in place. Only if this fails will I resort to cutting another access port in the bottom of the fuselage. Incidentally, prior to installing CS10/2 I used 5 minute epoxy to hold all of those washers in place and used a greased pin slightly smaller than the size of the bolt holes to maintain alignment during cure. With my many attempts to assemble the rod end to CS10/2 these washers have remained in place. Best regards, Rob Housman Irvine, California Europa XS Rotax 914 S/N A070 Airframe complete Avionics in progress From: owner-europa-list-server@matronics.com [mailto:owner-europa-list-server@matronics.com] On Behalf Of nigel_graham@m-tecque.co.uk Sent: Monday, February 24, 2014 12:11 AM Subject: Re: Europa-List: Mod 76 - Altitude Hold Autopilot Hello Rob, I recently had to strip out and refit the CS10 and had to face the same problem so know exactly what you are up against. There is a solution. Ideally you need a trusty assistant - though I did succeed by myself (it took a whole afternoon though :-( ) I used a long socket, and filled it with spare nuts such that it prevented the nut you are attempting to tighten - sliding down into the barrel of the socket. I magnetised the socket by stroking it a few times with a strong magnet - that ensured that the nut would not drop out. Now the nut can be held precisely. The next bit seems non-intuitive, but tighten the bolt (not the nut) from the other side of the aircraft using your assistant and a long socket drive extension. All you need to focus on is keeping the nut in place (a long socket is easier to hold) until the thread catches. The only other thing to consider is keeping the washers in place until the bolt is inserted - this was done by sticking the washers using a blob of grease. It is possible to achieve without resorting to an angle grinder! Nigel On 23/02/2014 23:52, Rob Housman wrote: Assuming that I am not the only one foolish enough to attempt a retro-fit of Mod 76 (Dynon) to a completed airframe I would appreciate any help from others who have done so. I am currently at an impasse. Removal of CS10 and replacing it with CS10/2 was tedious but relatively straightforward to complete, although the Europa Factory instructions manage to overlook a few essential points. I am stymied by my inability to get the nut on the bolt that attaches the rod end to the horn on CS10/2. With perseverance I managed to get the bolt through the horn on CS10/2 and the rod end, but my not very large hands cannot do both: hold the MS31042-3 nut and rotate it after I get it near the threaded end of the AN3-7A bolt. So far I have failed even to get the nut aligned so the bolt could be turned into the nut. At this point I am considering cutting another access hole in the bottom of the fuselage but only as a last resort would I start cutting. Suggestions? Best regards, Rob Housman Irvine, California Europa XS Rotax 914 S/N A070 Airframe complete Avionics in progress sp; - The Europa-List Email Forum utilities such as List Photoshare, and much much --> http://www.matron================== <http://www.matronics.com/Navigator?Europa-List> < - content also available via the Web --> http://forums.matronics.com - List Contribution Web generous nbsp; --> http://www.matronics.com/c= <http://www.matronics.com/contribution> <http://www.matronics.com/contribution>




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