---------------------------------------------------------- RV-List Digest Archive --- Total Messages Posted Mon 08/27/07: 5 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 04:40 AM - Re: Another remote compass solution () 2. 05:30 AM - Re: Leather supplier (Greg Young) 3. 09:53 AM - Re: Re: Another remote compass solution (Dave Cudney) 4. 04:30 PM - Re: Re: Another remote compass solution (Sam Buchanan) 5. 04:42 PM - You've gotta read this (Jerry Hansen) ________________________________ Message 1 _____________________________________ Time: 04:40:44 AM PST US From: Subject: RV-List: Re: Another remote compass solution All of you right. A few notes The electric Ritchie boat compass is not made any more, so if you get one its old new stock. You may find them hard to get now. I was going to use one and bought it. I decided to get a Dynon EFIS, which as a mag compass, so I did not use it. GPS has made the compass obsolete? True ATC wants us to fly heading, usually, but if VFR with a GPS "Track" is way better any day. If you have TRACK why in the world would you care or need mag heading? (smile laugh). Seriously you are not dead reckoning with a GPS on board. I look at the compass rarely, may be to double check the EFIS. On the Boeing B737 there is a wet compass, folded up and out of view most of the time. For Day VFR experimental, a "whisky" or "jelly jar" compass of ANY KIND is needed for day VFR! Reference the link below. (periheliondesign.com has all kind of cool electrical stuff for RV builders.) http://www.periheliondesign.com/downloads/MINIMUM%20INSTRUMENT%20AND%20EQUIPMENT%20REQUIREMENTS.pdf No compass is needed at all in an experimental for day VFR (see above). Think about how much you really ever used a wet compass in the past. In the past we used it to set the vacuum powered DG. I fly a no electric J-3 sometimes and dead reckon. Yes it has a use but with GPS, not much. However the advice below is probably good advice: "GPS should be used in conjunction with dead reckoning, not to replace it. Electronics are man-made and subject to failure without warning." (no argument) As a CFI and instrument instructor in the past I taught all kinds of compass trivia and lead/lag-dip, but really it's not practical for much. If the GPS goes out a heading would be nice of course, but I hate instruments that lie. I almost rather no compass than one that's useless, assuming you are VFR and have GPS of some kind. Cheers George --------------------------------- ________________________________ Message 2 _____________________________________ Time: 05:30:20 AM PST US From: "Greg Young" Subject: RE: RV-List: Leather supplier I bought leather from B&B to do both my RV and Navion. They have a lot more than what they bring to Oshkosh & Sun N Fun. I got a sample at SnF and called them a few weeks later. I got 6 hides and they made sure they were all from the same dye lot. Excellent quality at $135/hide. It was a good deal for me particularly since I got to see and touch it before I bought. Apparently they are Cessna surplus since my color was tagged as Caravan Charcoal. Nice folks to deal with. Plan on a check or COD since they don't do credit cards. They are in the Yeller Pages: B&B AIRCRAFT SUPPLIES 913-884-5930 AN HARDWARE, AIRCRAFT SURPLUS AND LEATHER SEAT SKINS Regards, Greg Young - Houston (DWH) RV-6 N6GY - project Phoenix Navion N5221K - just an XXL RV-6A > > > Hi Ted- > > >Does anyone know of a source for leather to upholster my seats? > > B&B Aircraft used to bring quite a selection to OSH. I don't > know anything about the leather market, but their prices for > aircraft hardware and electrical bits were certainly among > the best on the field. > > glen matejcek > aerobubba@earthlink.net > > 4:55 PM ________________________________ Message 3 _____________________________________ Time: 09:53:45 AM PST US From: Dave Cudney Subject: Re: RV-List: Re: Another remote compass solution I was going through the same ruminations a week or so ago as to wether or not a Dynon D 100 would classify as a "magnetic compass". It does have a magnetrometer , but requires power for it to work --- and I do have a back up battery in the D 100 which is supposed to work for about 1 1/2 hours after power failure. As opinions were split as to wether this would suffice, I decided to use a Pegasus whiskey compass from S.I.R.S. which I got from AC Spruce for $200. The compass is TSOD as a backup AC compass. So far I am impressed with how compact, light, and durable it seems to be. Luckily I found a spot for it in the panel where it is unaffected by any stray magnetic fields. I now have five devices in the aircraft which will give me heading information not including VOR --- seems like overkill particularly when I'll probably use the 396 in the gismo mount most of the time. The gist of the opinions I got from folks who have gone through the process was that it all depends on the DAR that you get as to wether or not you need a non powered, whiskey type compass. I decided not to tempt fate and got the Pegasus. It doesn't weigh much more than the metal in hole I cut out of the panel for it. good luck dave On Aug 27, 2007, at 4:39 AM, wrote: > All of you right. A few notes > > The electric Ritchie boat compass is not made any more, so > if you get one its old new stock. You may find them hard to > get now. I was going to use one and bought it. I decided to > get a Dynon EFIS, which as a mag compass, so I did not > use it. > > GPS has made the compass obsolete? > > True ATC wants us to fly heading, usually, but if VFR with a > GPS "Track" is way better any day. If you have TRACK why > in the world would you care or need mag heading? (smile > laugh). Seriously you are not dead reckoning with a GPS on > board. I look at the compass rarely, may be to double check > the EFIS. On the Boeing B737 there is a wet compass, > folded up and out of view most of the time. > > For Day VFR experimental, a "whisky" or "jelly jar" > compass of ANY KIND is needed for day VFR! > Reference the link below. (periheliondesign.com has all kind > of cool electrical stuff for RV builders.) > > http://www.periheliondesign.com/downloads/MINIMUM%20INSTRUMENT%20AND > %20EQUIPMENT%20REQUIREMENTS.pdf > > No compass is needed at all in an experimental for day > VFR (see above). Think about how much you really ever > used a wet compass in the past. In the past we used it to set > the vacuum powered DG. I fly a no electric J-3 > sometimes and dead reckon. Yes it has a use but with GPS, > not much. However the advice below is probably good advice: > > "GPS should be used in conjunction with dead reckoning, > not to replace it. Electronics are man-made and subject to > failure without warning." (no argument) > > As a CFI and instrument instructor in the past I taught all > kinds of compass trivia and lead/lag-dip, but really it's not > practical for much. If the GPS goes out a heading would be > nice of course, but I hate instruments that lie. I almost rather > no compass than one that's useless, assuming you are VFR > and have GPS of some kind. > > Cheers George > > ________________________________ Message 4 _____________________________________ Time: 04:30:37 PM PST US From: Sam Buchanan Subject: Re: RV-List: Re: Another remote compass solution Just for the sake of the DAR I splurged on a suction cup compass from Walmart, less than $5 as I recall. The compass was tossed into the flight bag once he left the airport. He did say I would need a correction card...... ;-) Sam Buchanan RV-6 Classic, 812 hrs =================================== Dave Cudney wrote: > I was going through the same ruminations a week or so ago as to wether > or not a Dynon D 100 would classify as a "magnetic compass". It does > have a magnetrometer , but requires power for it to work --- and I do > have a back up battery in the D 100 which is supposed to work for about > 1 1/2 hours after power failure. As opinions were split as to wether > this would suffice, I decided to use a Pegasus whiskey compass from > S.I.R.S. which I got from AC Spruce for $200. The compass is TSOD as a > backup AC compass. So far I am impressed with how compact, light, and > durable it seems to be. Luckily I found a spot for it in the panel > where it is unaffected by any stray magnetic fields. I now have five > devices in the aircraft which will give me heading information not > including VOR --- seems like overkill particularly when I'll probably > use the 396 in the gismo mount most of the time. > > The gist of the opinions I got from folks who have gone through the > process was that it all depends on the DAR that you get as to wether or > not you need a non powered, whiskey type compass. I decided not to > tempt fate and got the Pegasus. It doesn't weigh much more than the > metal in hole I cut out of the panel for it. > > good luck > dave ________________________________ Message 5 _____________________________________ Time: 04:42:00 PM PST US From: "Jerry Hansen" Subject: RV-List: You've gotta read this http://www.avweb.com/news/ceocockpit/ceo_of_the_cockpit_73_those_devilish_li ttle_airplanes_195936-1.html Jerry Hansen Gillespie Field, CA ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message rv-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/RV-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/rv-list Browse Digests http://www.matronics.com/digest/rv-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.