---------------------------------------------------------- Europa-List Digest Archive --- Total Messages Posted Sat 03/05/05: 9 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 02:06 AM - Re: issues with Rotax 914 voltage regulator/rectifier? (Duncan McFadyean) 2. 05:14 PM - Fin Comm Ant. (DuaneFamly@aol.com) 3. 05:29 PM - Transponder RF connector (MJKTuck@cs.com) 4. 05:50 PM - Re: Transponder RF connector (Michael Grass) 5. 07:11 PM - Re: Fin Comm Ant. (Cliff Shaw) 6. 07:36 PM - Re: Fin Comm Ant. (DuaneFamly@aol.com) 7. 08:22 PM - Re: Fin Comm Ant. (Paul McAllister) 8. 09:10 PM - Re: Europa flight training () 9. 09:27 PM - Re: Europa flight training (Paul Boulet) ________________________________ Message 1 _____________________________________ Time: 02:06:43 AM PST US From: "Duncan McFadyean" Subject: Re: Europa-List: issues with Rotax 914 voltage regulator/rectifier? --> Europa-List message posted by: "Duncan McFadyean" <> Do we need to? Mine is mounted on the firewall close to the air (exit) vent. A temperature label stuck to hte body of the regulator has read a maximum temp. of 70C in 200 hours of service; and this was probably during heat soak after shutdown or during a long taxiing hold, when the regulator would have little to do. It's agreed that mounting the regulator close to the exhaust headers (numerous examples of this are around) gives little chance of survival.. Duncan McF. ----- Original Message ----- From: "Jan de Jong" Subject: Re: Europa-List: issues with Rotax 914 voltage regulator/rectifier? > --> Europa-List message posted by: Jan de Jong > > Very interesting material on the subject (IMO) ... > Gilles Thse and Jrme Delamare have tested the Rotax alternator and > the Ducati Energia rectifier/regulator and written 3 articles (with > another to follow but that hasn't appeared): > http://foxpapa.com/rubrique.php3?id_rubrique=138 > > The first article (alternator) shows: > - listing of basic properties > - no-load: output voltage (100Vp-p max.), harmonics composition, > effective value as a function of rpm > - impedance at various stator currents > - short circuit: impedance and effective current as a function of rpm > (21A max.) > - short circuit temperature rise (30 degrees + 17 after stopping - > considered ok) > > The second article (battery) shows: > - battery Hawker SBS8, 7.4Ah > - discussion of battery role > - discharged at 5A for 45 minutes > - 40 minutes of recharging at 14.3-14.4V, current starting at 17A > > The third article (rectifier/regulator) shows: > - diode bridge rectified, no load > - diode bridge rectified with capacitor, no load > - with shunt regulating resistor at max rpm, no load > - with shunt regulating transistor at max rpm, no load: dissipates 260W! > - with series regulating resistor, worst load, at max rpm > - with series regulating transistor, worst load, at max rpm: dissipates > 220W! > - controlled one polarity thyristor rectification, on-off; hard on the > hardware > - controlled one polarity thyristor rectification, each wave; this is > how it works > - (JdJ: and dissipates 80W apparently - see below) > - load budget for various conditions > > The fourth article would likely have reported on the marginal thermal > situation of the regulator. > Gilles gave a short version on the aeroelectric forum: > - regulator dissipates max. 80W, at 240W output > - heatsink to sea level ambient air thermal resistance is 2 degrees C/W > (measured) > - junction to heatsink thermal resistance is 0.3 degrees C/W (estimated) > - junction to sea level ambient air thermal resistance is 2.3 degrees > C/W (the sum) > - so 80W gives a 184 degrees C increase in junction temperature above > ambient > - 125 degrees C is a reasonable maximum for a semiconductor junction > - (JdJ: the maximum I have seen on a datasheet was 175 degrees) > - so marginal is hardly the term to use > - but moving air helps a lot - with a PC-type fan the 2.3 number changes > to 0.8 > - so then 80W gives a 64 degrees C increase in junction temperature > above ambient > > My conclusion: > A solid state device is extremely reliable if its limits are not > exceeded, so that is apparently what we do. > Could we not mount the regulator next to the radiators somehow instead > of on the firewall. That would guarantee moving air. Four meters of > 10awg weigh 200g. The mounting should probably allow the capacitor to > join. Can't think of further input. > ? > > Jan de Jong > 461, too slow, starting on the wings.. > > ________________________________ Message 2 _____________________________________ Time: 05:14:50 PM PST US From: DuaneFamly@aol.com Subject: Europa-List: Fin Comm Ant. --> Europa-List message posted by: DuaneFamly@aol.com Good day All, Just a quick question on the length of the Comm ant. installed in the tail fin. From all the archive threads that I have read, the length of 1.9259 feet seems to be a good number. But, is that then cut in half with the coax center connected to one side and the coax shield connected to the other? Or is it left whole for the center conductor and an equal length added to the other side for the shield? Thanks in advance for any input. Mike Duane A207 Redding, California XS Conventional Gear Just about to put the top on but still finding little things to do before that. ________________________________ Message 3 _____________________________________ Time: 05:29:54 PM PST US From: MJKTuck@cs.com Subject: Europa-List: Transponder RF connector --> Europa-List message posted by: MJKTuck@cs.com Hi Folks, I'm in the process of hooking up a Garmin 327 transponder. The instructions show the cable going into one of those 90 degree BNC RF connectors where you solder the inner cable onto the male pin, put a little U-shaped 50 ohm match bushing inside and then put the cap on. The shielding is then soldered to the casing. The problem is this type of connector wasn't supplied and the one I got from Aircraft Spruce (the only one they do apparently) is a simple straight BNC connector with the shielding crimped on the end (i.e. no u-shaped bushing). Do I need to get a BNC connector like they show in the manual or will the regular one work just as well? Regards, Martin Tuck N152MT Wichita, Kansas ________________________________ Message 4 _____________________________________ Time: 05:50:40 PM PST US From: "Michael Grass" Subject: Re: Europa-List: Transponder RF connector --> Europa-List message posted by: "Michael Grass" Hi Martin, as long as you do not have to make a sharp bend in your coax cable, a straight connector is a good choice. Actually I would prefer a straight connector over the 90 deg type. The HF signal does not like a sharp change of direction. Michael Grass A266 TriGear ----- Original Message ----- From: Subject: Europa-List: Transponder RF connector > --> Europa-List message posted by: MJKTuck@cs.com > > Hi Folks, > > I'm in the process of hooking up a Garmin 327 transponder. The > instructions > show the cable going into one of those 90 degree BNC RF connectors where > you > solder the inner cable onto the male pin, put a little U-shaped 50 ohm > match > bushing inside and then put the cap on. The shielding is then soldered to > the > casing. > > The problem is this type of connector wasn't supplied and the one I got > from > Aircraft Spruce (the only one they do apparently) is a simple straight BNC > connector with the shielding crimped on the end (i.e. no u-shaped > bushing). > > Do I need to get a BNC connector like they show in the manual or will the > regular one work just as well? > > Regards, > Martin Tuck > N152MT > Wichita, Kansas > > > ________________________________ Message 5 _____________________________________ Time: 07:11:19 PM PST US From: "Cliff Shaw" Subject: Re: Europa-List: Fin Comm Ant. --> Europa-List message posted by: "Cliff Shaw" Mike I used the RST Engineering kit for my antennas. They are the .5" copper tape type. I glassed over them on inside of the fus and tail. The COM is 20.3" on each leg and "V"ed at 10 to 30 degrees. I think it makes a little bit of different in the length depending on how they are laid out in relation to each other. There are 3 Ferrite Balun over the coax at the antenna end. Mine seem to work well in all directions of flight. Cliff Shaw 1041 Euclid ave. Edmonds, WA 98020 425 776 5555 http://www.europaowners.org/WileE ----- Original Message ----- From: Subject: Europa-List: Fin Comm Ant. > --> Europa-List message posted by: DuaneFamly@aol.com > > Good day All, > > Just a quick question on the length of the Comm ant. installed in the tail > fin. From all the archive threads that I have read, the length of 1.9259 > feet > seems to be a good number. But, is that then cut in half with the coax > center > connected to one side and the coax shield connected to the other? Or is it > left whole for the center conductor and an equal length added to the > other side > for the shield? > > Thanks in advance for any input. > > Mike Duane A207 > Redding, California > XS Conventional Gear > Just about to put the top on but still finding little things to do before > that. > > > ________________________________ Message 6 _____________________________________ Time: 07:36:05 PM PST US From: DuaneFamly@aol.com Subject: Re: Europa-List: Fin Comm Ant. --> Europa-List message posted by: DuaneFamly@aol.com Thanks Cliff. I'll go with those measurements and set up. This will be my backup antenna with a coax connection accessible for my handheld. Do Not Archive Mike ________________________________ Message 7 _____________________________________ Time: 08:22:07 PM PST US From: "Paul McAllister" Subject: Re: Europa-List: Fin Comm Ant. --> Europa-List message posted by: "Paul McAllister" Hi Mike, I went with the Bob Archer antenna in the fin, the main reason being that it would be much more robust than a copper foil one. The antenna is an E shape and its pretty tricky to get in to fit in the fin area, but with some fiddling around you can get it in the right spot. I haven't had any comms problems with this antenna. Paul ________________________________ Message 8 _____________________________________ Time: 09:10:15 PM PST US From: Subject: RE: Europa-List: Europa flight training --> Europa-List message posted by: Hi Paul No reply from Bob. If he received the email he, unlike Kim, would not fail to respond. Soo, either he didn't get it, is traveling, or is thinking about it... Have you read Faa AC 90-89A? 99 pages of well done stuff about flight testing, first flights, check lists, etc. You can down load it at www.faa.gov. If we don't find someone to transition us, I plan to test fly my own. Jacobsen did his. The FAA guide talks of using long runways, lifting off a few feet and then landing. Sounds ok. Tom -----Original Message----- From: owner-europa-list-server@matronics.com [mailto:owner-europa-list-server@matronics.com] On Behalf Of Paul Boulet Subject: Europa-List: Europa flight training --> Europa-List message posted by: Paul Boulet Hi All; I'm have a bit of trouble finding someone with Europa time that could help transition myself and one other pilot into solo flying my creation. Is there someone out there that would like an expense paid trip to the Phoenix, Arizona area to help us out? The plane was professionally built by Phoenix composites and it's been throughly checked out...first by Kim Prout and on a separate trip by John Hurst. Thanks... Paul Boulet, N914PB; trying to fly off my 40 hours; still need paint, speed kit installation and interior installed advertising on the Matronics Forums. -- No virus found in this incoming message. Checked by AVG Anti-Virus. -- No virus found in this outgoing message. Checked by AVG Anti-Virus. ________________________________ Message 9 _____________________________________ Time: 09:27:55 PM PST US From: Paul Boulet Subject: RE: Europa-List: Europa flight training --> Europa-List message posted by: Paul Boulet Thanks Tom. Yeah...I think I'm close to flying myself without any instruction. I might take an hour or so of dual in a Citabria just to bone up on my taildragger skills and also work on getting that tail down immediately. It seems like you pretty much have to stall the Europa into a landing so as to get that tailwheel down, not balloon, and of course not unicycle (can you spell groundloop) the plane. I'm in Las Vegas next weekend for a wedding...perhaps the following weekend I can go... thanks again for chatting with me about this Paul --- beecho@beecho.org wrote: > --> Europa-List message posted by: > > > Hi Paul > > No reply from Bob. If he received the email he, > unlike Kim, would not fail > to respond. Soo, either he didn't get it, is > traveling, or is thinking > about it... > > Have you read Faa AC 90-89A? 99 pages of well done > stuff about flight > testing, first flights, check lists, etc. You can > down load it at > www.faa.gov. > > If we don't find someone to transition us, I plan to > test fly my own. > Jacobsen did his. The FAA guide talks of using long > runways, lifting off a > few feet and then landing. Sounds ok. > > Tom > > -----Original Message----- > From: owner-europa-list-server@matronics.com > [mailto:owner-europa-list-server@matronics.com] On > Behalf Of Paul Boulet > To: europa-list@matronics.com > Subject: Europa-List: Europa flight training > > > --> Europa-List message posted by: Paul Boulet > > > > Hi All; > > I'm have a bit of trouble finding someone with > Europa time that could help > transition myself and one other pilot into solo > flying my creation. Is > there someone out there that would like an expense > paid trip to the Phoenix, > Arizona area to help us out? The plane was > professionally built by Phoenix > composites and it's been throughly checked > out...first by Kim Prout and on a > separate trip by John Hurst. > > Thanks... Paul Boulet, N914PB; trying to fly off my > 40 hours; still need > paint, speed kit installation and interior installed > > > advertising on the Matronics Forums. > > > -- > No virus found in this incoming message. > Checked by AVG Anti-Virus. > > > -- > No virus found in this outgoing message. > Checked by AVG Anti-Virus. > > > > Contributions > any other > Forums. > > http://www.matronics.com/subscription > http://www.matronics.com/FAQ/Europa-List.htm > http://www.matronics.com/archives > http://www.matronics.com/photoshare > http://www.matronics.com/emaillists > > > > > >