---------------------------------------------------------- Europa-List Digest Archive --- Total Messages Posted Wed 07/28/10: 10 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 02:43 AM - Re: Monowheel landing gear dampers (Kingsley Hurst) 2. 05:40 AM - Re: Monowheel landing gear dampers (GRAHAM SINGLETON) 3. 11:53 AM - Negative "G" (Fergus Kyle) 4. 12:23 PM - Voltage reading of 25V (Karl Heindl) 5. 02:33 PM - Re: Monowheel landing gear dampers (Kingsley Hurst) 6. 02:49 PM - Re: Monowheel landing gear dampers (Kingsley Hurst) 7. 04:32 PM - Re: Voltage reading of 25V (rampil) 8. 04:37 PM - Re: Voltage reading of 25V (Bud Yerly) 9. 06:22 PM - Re: Voltage reading of 25V (Karl Heindl) 10. 10:04 PM - Re: Voltage reading of 25V (Greg Fuchs) ________________________________ Message 1 _____________________________________ Time: 02:43:44 AM PST US From: "Kingsley Hurst" Subject: Re: Europa-List: Monowheel landing gear dampers > Has anyone experienced flying the Monowheel without the dampers ? Well I certainly haven't Guerner but if I may just add a little to Bud's comment . . . . . The original Europa had no rubber suspension relying on the balloon tyre to dampen the bumps. Europa found this was not good enough so introduced the rubber block but found it to have too much rebound. They then inroduced the hydraulic dampers to arrest the rebound and were finally satisfied they had it right. This is my recollection of the progression so if you dispense with the dampers, you will be reverse engineering so to speak what has been done before. Cheers Kingsley in Oz. ________________________________ Message 2 _____________________________________ Time: 05:40:17 AM PST US From: GRAHAM SINGLETON Subject: Re: Europa-List: Monowheel landing gear dampers Kingsley=0Ayour recollection is pretty well correct but there was an additi onal =0Acomplication, the XS tailwheel was introduced shortly afterwards, ( I'm pretty =0Asure.) With the original Mustang/P51 tailwheel bounces were m uch more of a =0Aproblem. You might get away without dampers on the XS, the y tend to wear out =0Aquite soon anyway.=0Abtw Guerner is Remi's surname =0AGraham=0A=0A=0A________________________________=0AFrom: Kingsley Hurst < hurstkr@redzone.com.au>=0ATo: europa-list@matronics.com=0ASent: Wednesday, 28 July, 2010 10:42:01=0ASubject: Re: Europa-List: Monowheel landing gear d edzone.com.au>=0A=0A> Has anyone experienced flying the Monowheel without t he dampers ?=0A=0AWell I certainly haven't Guerner but if I may just add a little to Bud's comment =0A. . . . .=0A=0AThe original Europa had no rubber suspension relying on the balloon tyre to =0Adampen the bumps.=0AEuropa fo und this was not good enough so introduced the rubber block but found =0Ait to have too much rebound.=0AThey then inroduced the hydraulic dampers to a rrest the rebound and were finally =0Asatisfied they had it right.=0A=0AThi s is my recollection of the progression so if you dispense with the dampers , =0Ayou will be reverse engineering so to speak what has been done before. =========================0A == ________________________________ Message 3 _____________________________________ Time: 11:53:15 AM PST US From: "Fergus Kyle" Subject: Europa-List: Negative "G" This may not be the place to ask, but experience here might be better than elsewhere. My question (following the MG specs sheet regarding neg G) is: I believe the Rotax restriction on the 900 series engines is NO Neg G, yet several have remarked on "jinking" the undercarriage to lock recalcitrant outriggers and similar moves. What is the proper limit? - is an instantaneous neg G manoeuvre a No-no or is there perhaps some leeway ( No inverted flight, etc.)? What thinkest thou sirrah? Cheers Ferg ________________________________ Message 4 _____________________________________ Time: 12:23:49 PM PST US From: Karl Heindl Subject: Europa-List: Voltage reading of 25V This one is for you electric specialists: All I did was to move the battery back to the firewall from the rear fusela ge. I fire up the engine for a highspeed taxi test for my MG configuration and I get a voltage reading of 25. I swapped regulators - I always carry a spare - but no change. I also get the same reading with the alternator switched off. What could I possibly ha ve screwed up ? To make things even more perplexing=2C the oil pressure indication does not drop below 93=2C as the engine is warming up=2C but maybe the two are some how related. All readings are from the EIS. Never had a problem like this b efore. Any help appreciated. Thanks=2C Karl ________________________________ Message 5 _____________________________________ Time: 02:33:10 PM PST US From: "Kingsley Hurst" Subject: Re: Europa-List: Monowheel landing gear dampers Yes Graham, the XS tailwheel DID come a little while afterwards. I hadn't considered that at all and I suspect you are quite right. Only one way to find out I guess. > btw Guerner is Remi's surname Thank you for pointing that out . . . . how embarrassing . . . . I have seen Remi's name enough times now to know . . . . . I'm not all that far behind you in age so I'm sure at least YOU will understand. BTW, if you come over this time next year, you can sleep in OUR new house. Cheers and regards to Joan please. Kingsley Do not archive From: GRAHAM SINGLETON To: europa-list@matronics.com Sent: Wednesday, July 28, 2010 10:38 PM Subject: Re: Europa-List: Monowheel landing gear dampers Kingsley your recollection is pretty well correct but there was an additional complication, the XS tailwheel was introduced shortly afterwards, (I'm pretty sure.) With the original Mustang/P51 tailwheel bounces were much more of a problem. You might get away without dampers on the XS, they tend to wear out quite soon anyway. btw Guerner is Remi's surname Graham ________________________________ Message 6 _____________________________________ Time: 02:49:45 PM PST US From: "Kingsley Hurst" Subject: Re: Europa-List: Monowheel landing gear dampers > btw Guerner is Remi's surname Sorry Remi. Kingsley Do not archive. ________________________________ Message 7 _____________________________________ Time: 04:32:59 PM PST US Subject: Europa-List: Re: Voltage reading of 25V From: "rampil" sounds like a bad ground! -------- Ira N224XS Read this topic online here: http://forums.matronics.com/viewtopic.php?p=306619#306619 ________________________________ Message 8 _____________________________________ Time: 04:37:21 PM PST US From: "Bud Yerly" Subject: Re: Europa-List: Voltage reading of 25V Karl, Not knowing your bus wiring, Do you have a spare / backup battery, and if so did it accidentally get wired in series? Double the voltage and a higher than normal voltage to the sender tends to drive the pressure up and temps down (I think, I may have to do some research as I may have that backwards.) I know, dumb question, but I thought I'd ask. Bud ----- Original Message ----- From: Karl Heindl To: europa-list@matronics.com Sent: Wednesday, July 28, 2010 3:23 PM Subject: Europa-List: Voltage reading of 25V This one is for you electric specialists: All I did was to move the battery back to the firewall from the rear fuselage. I fire up the engine for a highspeed taxi test for my MG configuration and I get a voltage reading of 25. I swapped regulators - I always carry a spare - but no change. I also get the same reading with the alternator switched off. What could I possibly have screwed up ? To make things even more perplexing, the oil pressure indication does not drop below 93, as the engine is warming up, but maybe the two are somehow related. All readings are from the EIS. Never had a problem like this before. Any help appreciated. Thanks, Karl http://www.matronics.com/Navigator?Europa-List http://www.matronics.com/contribution ________________________________ Message 9 _____________________________________ Time: 06:22:23 PM PST US From: Karl Heindl Subject: RE: Europa-List: Voltage reading of 25V Hi Bud=2C Good try. There are other small batteries=2C but they are totally isolated =2C some 9 volts for variometer and stall warners=2C and a small 12V for an exterior alarm (to scare animals off the runway or warn pedestrians when t axiing etc.). I merely reconnected the battery leads to the two posts which I have on top of the starboard footwell. I must have caused a short or ground somehow =2C but I just don't see it. The engine starts and is running fine=2C but I only let it run for a minute or so. Karl From: budyerly@msn.com Subject: Re: Europa-List: Voltage reading of 25V Karl=2C Not knowing your bus wiring=2C Do you have a spare / backup battery=2C and if so did it accidentally get w ired in series? Double the voltage and a higher than normal voltage to the sender tends to drive the pressure up and temps down (I think=2C I may have to do some rese arch as I may have that backwards.) I know=2C dumb question=2C but I thought I'd ask. Bud ----- Original Message ----- From: Karl Heindl Sent: Wednesday=2C July 28=2C 2010 3:23 PM Subject: Europa-List: Voltage reading of 25V This one is for you electric specialists: All I did was to move the battery back to the firewall from the rear fusela ge. I fire up the engine for a highspeed taxi test for my MG configuration and I get a voltage reading of 25. I swapped regulators - I always carry a spare - but no change. I also get the same reading with the alternator switched off. What could I possibly ha ve screwed up ? To make things even more perplexing=2C the oil pressure indication does not drop below 93=2C as the engine is warming up=2C but maybe the two are some how related. All readings are from the EIS. Never had a problem like this b efore. Any help appreciated. Thanks=2C Karl href="http://www.matronics.com/Navigator?Europa-List">http://www.matronhr ef="http://forums.matronics.com">http://forums.matronics.com href="http://www.matronics.com/contribution">http://www.matronics.com/c ________________________________ Message 10 ____________________________________ Time: 10:04:20 PM PST US From: "Greg Fuchs " Subject: RE: Europa-List: Voltage reading of 25V Hmm..Not sure, My first thought was along the line of what Ira had said..bad ground somewhere. Try making some measurements between the power and ground rails with a handheld meter to confirm what the EIS was reading. Take the measurements with the key on and the engine off, to eliminate all chance of actually producing deadly avionics voltages from a spinning alternator. What is the EIS reading in this configuration(engine off)? Could there be something that was connected to the rear-ward wiring that became disconnected when moving the battery up front? Is the ground strap to the engine block still connected? Greg _____ From: owner-europa-list-server@matronics.com [mailto:owner-europa-list-server@matronics.com] On Behalf Of Karl Heindl Sent: Wednesday, July 28, 2010 12:23 PM Subject: Europa-List: Voltage reading of 25V This one is for you electric specialists: All I did was to move the battery back to the firewall from the rear fuselage. I fire up the engine for a highspeed taxi test for my MG configuration and I get a voltage reading of 25. I swapped regulators - I always carry a spare - but no change. I also get the same reading with the alternator switched off. What could I possibly have screwed up ? To make things even more perplexing, the oil pressure indication does not drop below 93, as the engine is warming up, but maybe the two are somehow related. All readings are from the EIS. Never had a problem like this before. Any help appreciated. Thanks, Karl ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message europa-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Europa-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/europa-list Browse Digests http://www.matronics.com/digest/europa-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.