Rookie Posted September 9, 2015 Report Posted September 9, 2015 Why does some of the Mooney's have this wire from the tail to the top of the fuselage? I'm very interested in a F and it has one! Quote
RobertGary1 Posted September 9, 2015 Report Posted September 9, 2015 (edited) Its an antenna for ADF, an old style radio that is uncommonly used in the United States nowadays. -Robert Edited September 9, 2015 by RobertGary1 Quote
N201MKTurbo Posted September 9, 2015 Report Posted September 9, 2015 But if it was all working, it made a great AM entertainment radio! The old Bendix coffee grinder could pick up AM stations from half way across the country! 1 Quote
gsengle Posted September 9, 2015 Report Posted September 9, 2015 And if it's working you have to know how to do NDB approaches on your IR check ride :-o Sent from my iPhone using Tapatalk 3 Quote
M20F Posted September 9, 2015 Report Posted September 9, 2015 And if it's working you have to know how to do NDB approaches on your IR check ride :-o Sent from my iPhone using Tapatalk If you can find one :-) Quote
Rookie Posted September 9, 2015 Author Report Posted September 9, 2015 Thanks Guys, good to know! Quote
N201MKTurbo Posted September 9, 2015 Report Posted September 9, 2015 They really aren't that hard, especially if you make a waypoint at the NDB on your GPS! Quote
RobertGary1 Posted September 9, 2015 Report Posted September 9, 2015 And if it's working you have to know how to do NDB approaches on your IR check ride :-o Sent from my iPhone using Tapatalk Oh, no I've gotten around that for students. You take a piece of tape and put it above it and write "INOP". -Robert, CFII 1 Quote
Mooneymite Posted September 9, 2015 Report Posted September 9, 2015 I'm not sure what all these guys are talking about. That wire was put on the planes to allow birds to alight and poop on your plane. 2 Quote
M20F Posted September 9, 2015 Report Posted September 9, 2015 In the day an ADF approach was better than nothing and ADF airways were definitely interesting, but they really were great at showing how wind impacts a plane. I I love my Garmin but once or twice a year I buy paper charts and fly a Victor airway. It is sad in a way to see something's go :-( Quote
Andy95W Posted September 10, 2015 Report Posted September 10, 2015 I wasn't sure what this topic was about when I read the title. Now I realize the intention was to make me feel old. 2 Quote
1964-M20E Posted September 10, 2015 Report Posted September 10, 2015 And if it's working you have to know how to do NDB approaches on your IR check ride :-o Sent from my iPhone using Tapatalk When I did my check ride a few years ago I had an ADF and did not have to do an ADF approach. I believe partly because thee were none close. I did practice ADF approaches and they are fun to play with. I would also tune in NDBs for added situational awareness. In New Orleans we have WWL which is 100,000W transmitter on 870am I could pick that up most anywhere and make my way home to New Orleans if I had to. Then again all I need to do is pickup the gulf coast and fly east or west and I get home sooner or later. Quote
Marauder Posted September 10, 2015 Report Posted September 10, 2015 When I did my check ride a few years ago I had an ADF and did not have to do an ADF approach. I believe partly because thee were none close. I did practice ADF approaches and they are fun to play with.I would also tune in NDBs for added situational awareness. In New Orleans we have WWL which is 100,000W transmitter on 870am I could pick that up most anywhere and make my way home to New Orleans if I had to. Then again all I need to do is pickup the gulf coast and fly east or west and I get home sooner or later. When I did my check ride, they were fair game and I had to do one. I remembered I struggled with them in training because of the reverse directional stuff you needed to know when flying away from the station. I think it was Richard Collins who wrote an article "It's over yonder" that finally made everything click for me. I also know that one guy developed his own NDB approach at my airport in NY based on a local radio station. I was at the airport when he popped out of the bottom of the cloud layer over the road paralleling the airport and below the power lines lining the road. He got lucky... I don't miss the NDB approach and have gotten rather fond of LPVs... Sent from my iPad using Tapatalk Quote
Bob_Belville Posted September 10, 2015 Report Posted September 10, 2015 I don't miss the NDB approach and have gotten rather fond of LPVs... Sent from my iPad using Tapatalk Amen! The NDB 03 approach to KMRN over Fiddlers NDB was no fun at all when the wind was blowing, and the wind always was blowing something like 300/07. FIQ is 7 miles from the end of 03. If you flew IFR over 25 years ago you'll remember how current you had to be to stabilize heading, pass over the NDB, keep the needle stable (not centered if there was crosswind) and watch the stopwatch to the missed approach limit. The only backup to the clock was a cross radial from BZM vortac 25 miles away. 1 Quote
Marauder Posted September 10, 2015 Report Posted September 10, 2015 Amen! The NDB 03 approach to KMRN over Fiddlers NDB was no fun at all when the wind was blowing, and the wind always was blowing something like 300/07. FIQ is 7 miles from the end of 03. If you flew IFR over 25 years ago you'll remember how current you had to be to stabilize heading, pass over the NDB, keep the needle stable (not centered if there was crosswind) and watch the stopwatch to the missed approach limit. The only backup to the clock was a cross radial from BZM vortac 25 miles away. What I remember was "double the correction angle" to get back on course and take "half back out" to stay on course all the while doing this with a magnetic compass that was constantly needing to be swung and a DG that precessed with the best of them. I almost forgot the famous "transpose" your heading onto the compass card. Man... thinking back on those days is like looking into our Neanderthal past. NDB was one step up from rubbing two sticks together. Sent from my iPad using Tapatalk 1 Quote
Andy95W Posted September 10, 2015 Report Posted September 10, 2015 NDB was one step up from rubbing two sticks together. Hmmm... Fire in the cockpit, or shoot an NDB approach. Tough call... 3 Quote
Raptor05121 Posted September 10, 2015 Report Posted September 10, 2015 I just got around to taking the NDB antenna off my plane last night. Quote
RobertGary1 Posted September 10, 2015 Report Posted September 10, 2015 I remember my first NDB. When I took my IFR checkride they were still asking us to do them. I remember looking up and seeing the airport was not in front of me and my instructor thinking I'd done a good job! Not a sight you're used to if you're used to an ILS. -Robert Quote
mike_elliott Posted September 10, 2015 Report Posted September 10, 2015 Why does some of the Mooney's have this wire from the tail to the top of the fuselage? I'm very interested in a F and it has one! Its practical use is for a clothes line to dry out your rained soaked sleeping bag, clothes etc at Oshkosh when camping in the north 40. In a former life, it was a sense antenna for a masochistic instrument called an ADF...Gawd, I love teaching ADF approaches! Quote
Bob_Belville Posted September 10, 2015 Report Posted September 10, 2015 Gawd, I love teaching ADF approaches! Not sure if you're being sarcastic or you're a sadist. Quote
mike_elliott Posted September 10, 2015 Report Posted September 10, 2015 Not sure if you're being sarcastic or you're a sadist. Both, but I really did enjoy teaching an ADF approach. It was cool to see the light bulb go off in a student when they finally got it from a situational awareness standpoint with the ol' steam gauges. One doesn't get much of a chance to do this now days, but that's really better and safer. 1 Quote
Bob_Belville Posted September 10, 2015 Report Posted September 10, 2015 Both, but I really did enjoy teaching an ADF approach. It was cool to see the light bulb go off in a student when they finally got it from a situational awareness standpoint with the ol' steam gauges. One doesn't get much of a chance to do this now days, but that's really better and safer. I was a math major and geometry was always pretty easy for me so the "situational awareness" wasn't hard to visualize. But the precision required to hold airspeed, vertical speed, altitude, and heading were not so easy. And the ADF in my first Mooney was turned like an AM radio - analog! I added a digital frequency read out to make tuning easier. Of course one had to listen and confirm the NDB's Morse code. Just remembering it makes my palms sweat a little. 1 Quote
Marauder Posted September 10, 2015 Report Posted September 10, 2015 Not sure if you're being sarcastic or you're a sadist. Bob -- we have seen these sadistic instructors before... 1 Quote
Piloto Posted September 13, 2015 Report Posted September 13, 2015 Later ADF receivers like the KR 87 have the sense (wire) antenna integrated into the loop antenna. The purpose of the sense element is to resolve the signal direction ambiguity in the loops elements. On some corporate jets you may see the tail wire antenna, but it is not for ADF but for HF radio. Original loop DF antennas were installed on top of the cockpit and were manually rotated to determine signal direction. José Quote
Rookie Posted September 16, 2015 Author Report Posted September 16, 2015 So if I buy a Mooney that has this antenna on it, can I take it off? It's not a pretty thing! Quote
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