Falcon vertical card Compass CH701 - Zenith Aircraft Builders and Flyers2024-03-28T10:07:05Zhttps://zenith.aero/forum/topics/falcon-vertical-card-compass-ch701?commentId=2606393%3AComment%3A233863&feed=yes&xn_auth=noLuzius,
I had to de-gauss the…tag:zenith.aero,2012-08-21:2606393:Comment:2338632012-08-21T15:03:04.271ZShay Kinghttps://zenith.aero/profile/ShayKing
<p>Luzius,</p>
<p>I had to de-gauss the tubular frame around the windshield on my 701 a few years ago. It took about 5 minutes to do with a borrowed de-gausser. Compass is mounted under the windscreen crossmember and has been accurate ever since.</p>
<p>Shay.</p>
<p></p>
<p>Luzius,</p>
<p>I had to de-gauss the tubular frame around the windshield on my 701 a few years ago. It took about 5 minutes to do with a borrowed de-gausser. Compass is mounted under the windscreen crossmember and has been accurate ever since.</p>
<p>Shay.</p>
<p></p> Hi Don, just an update on my…tag:zenith.aero,2012-08-21:2606393:Comment:2338102012-08-21T13:16:58.218ZLuzius Thoenyhttps://zenith.aero/profile/LuziusThoeny704
<p>Hi Don, just an update on my wacky compass. A friend of mine had a demagnatizer from his old Real to Real taperecorder its alittle handhold looks like a little curling iron, anyway i went along all the iron parts very slowly and real close cant make contact with it, you can feel a buzz as you go along. I was actualy surprised it did work,so now my compass works real acurate. I now have my airworthness inspection set up for Sep 4th.</p>
<p>Thanks for your info</p>
<p>Luzius Thoeny …</p>
<p>Hi Don, just an update on my wacky compass. A friend of mine had a demagnatizer from his old Real to Real taperecorder its alittle handhold looks like a little curling iron, anyway i went along all the iron parts very slowly and real close cant make contact with it, you can feel a buzz as you go along. I was actualy surprised it did work,so now my compass works real acurate. I now have my airworthness inspection set up for Sep 4th.</p>
<p>Thanks for your info</p>
<p>Luzius Thoeny N58LT</p> I'm using a Falcon Vertical C…tag:zenith.aero,2012-08-17:2606393:Comment:2327452012-08-17T22:01:34.204ZDan Dempseyhttps://zenith.aero/profile/DanDempsey
<p>I'm using a Falcon Vertical Card compass in my zodiac, seems to work fine (at least on the ground). I took great pains to keep it as far as possible from ferous materials.</p>
<p>I'm using a Falcon Vertical Card compass in my zodiac, seems to work fine (at least on the ground). I took great pains to keep it as far as possible from ferous materials.</p> Hi Bob,no i did not do any we…tag:zenith.aero,2012-08-17:2606393:Comment:2327382012-08-17T14:22:58.582ZLuzius Thoenyhttps://zenith.aero/profile/LuziusThoeny704
<p>Hi Bob,no i did not do any welding onthe tube frame,i checked and do have magnetic field on all steel parts . the plan now is to demagnatise some of it. thanks for advice.</p>
<p>Hi Bob,no i did not do any welding onthe tube frame,i checked and do have magnetic field on all steel parts . the plan now is to demagnatise some of it. thanks for advice.</p> HI Bob, iknow about the ajust…tag:zenith.aero,2012-08-17:2606393:Comment:2327372012-08-17T14:17:11.021ZLuzius Thoenyhttps://zenith.aero/profile/LuziusThoeny704
<p>HI Bob, iknow about the ajustment but it does not work at all points north no mater howe we turn the plane.</p>
<p>HI Bob, iknow about the ajustment but it does not work at all points north no mater howe we turn the plane.</p> Hi Don, thanks for the comeb…tag:zenith.aero,2012-08-17:2606393:Comment:2327352012-08-17T14:14:37.315ZLuzius Thoenyhttps://zenith.aero/profile/LuziusThoeny704
<p> Hi Don, thanks for the comeback, iwill try to demagnatise the frame system makes sense.</p>
<p>Thanks to all other replys too.</p>
<p> Hi Don, thanks for the comeback, iwill try to demagnatise the frame system makes sense.</p>
<p>Thanks to all other replys too.</p> Luzius
By the statement "Does…tag:zenith.aero,2012-08-16:2606393:Comment:2326392012-08-16T12:37:18.633ZBob McDonaldhttps://zenith.aero/profile/BobMcDonald
<p>Luzius</p>
<p>By the statement "Does not work in cabin" do you mean it is not accurate to N/S/E/W heading or it does not move when the airframe is rotated. Once installed you have to calibrate (adjust) the compass to a known heading. There is a small brass screw driver for this purpose with the compass. Never use a steel screw driver or force the adjustment past the stops (read manual).</p>
<p>Luzius</p>
<p>By the statement "Does not work in cabin" do you mean it is not accurate to N/S/E/W heading or it does not move when the airframe is rotated. Once installed you have to calibrate (adjust) the compass to a known heading. There is a small brass screw driver for this purpose with the compass. Never use a steel screw driver or force the adjustment past the stops (read manual).</p> Hi Luzius, I have the same pr…tag:zenith.aero,2012-08-16:2606393:Comment:2324292012-08-16T02:52:37.753ZDon Herbelhttps://zenith.aero/profile/DonHerbel
<p>Hi Luzius, I have the same problem. My tech counselor (also a DAR) and an engineer for NORDAM says the welding process for the steel cabin frame magnetizes the tubing and causes the mag compass to go wacko. The fix is to pass a tool called a de-gauser (not sure of the spelling) over the tubing to demagnetize it. It is essentially a coil with AC current passed through it. He says he has used it successfully. I'm going to borrow his, not sure where you can obtain one.</p>
<p>Don…</p>
<p>Hi Luzius, I have the same problem. My tech counselor (also a DAR) and an engineer for NORDAM says the welding process for the steel cabin frame magnetizes the tubing and causes the mag compass to go wacko. The fix is to pass a tool called a de-gauser (not sure of the spelling) over the tubing to demagnetize it. It is essentially a coil with AC current passed through it. He says he has used it successfully. I'm going to borrow his, not sure where you can obtain one.</p>
<p>Don Herbel</p>
<p>CH701 N848DH</p> By any chance did you do any…tag:zenith.aero,2012-08-16:2606393:Comment:2326882012-08-16T02:44:01.415ZBob Pustellhttps://zenith.aero/profile/BobPustell
<p>By any chance did you do any arc welding on your steel tube structure? I know that tube and rag airplanes sometimes drive their magnetic compass crazy and the cause is magnetized steel tubes. Supposedly, it is caused by arc (or most other forms of electric) welding -- not always, but it can happen. The 701 and 750 both have a section of welded steel tube in the cabin structure, the steel could be magnetized.</p>
<p> </p>
<p>For a tube and rag plane, there is a process of wrapping the tube…</p>
<p>By any chance did you do any arc welding on your steel tube structure? I know that tube and rag airplanes sometimes drive their magnetic compass crazy and the cause is magnetized steel tubes. Supposedly, it is caused by arc (or most other forms of electric) welding -- not always, but it can happen. The 701 and 750 both have a section of welded steel tube in the cabin structure, the steel could be magnetized.</p>
<p> </p>
<p>For a tube and rag plane, there is a process of wrapping the tube structure in a wire spiral and passing a controlled current through to de-gauss the structure. Maybe you are in the same need. Come to think of it, you say the compass is best down at the floor near the seat base. That would be the furthest from those welded steel tube areas of the upper forward cabin structure. Does the compass go nuts if you approach the cabin from the outside, say from outside the windshield? How close do you need to get before it goes crazy? Maybe you can use the compass behavior to help locate the source of the magnetic disturbance.</p> Dont have apicture right now.…tag:zenith.aero,2012-08-16:2606393:Comment:2327722012-08-16T02:13:29.920ZLuzius Thoenyhttps://zenith.aero/profile/LuziusThoeny704
<p>Dont have apicture right now. Its mounted on top of instrument pannel I made the bracket out of .050 6061-T6. It does not mater were I hold it inside the cabin exept on the floor close to the seat braket I get alittle movement but not acurate by all means. Thanks for your reply.</p>
<p>Dont have apicture right now. Its mounted on top of instrument pannel I made the bracket out of .050 6061-T6. It does not mater were I hold it inside the cabin exept on the floor close to the seat braket I get alittle movement but not acurate by all means. Thanks for your reply.</p>