---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Sun 08/20/17: 4 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 07:14 AM - Z-31 questions (Art Zemon) 2. 08:31 AM - Re: Z-31 questions (Bill) 3. 05:14 PM - Re: Z-31 questions (Robert L. Nuckolls, III) 4. 07:13 PM - Re: Z-31 questions (Art Zemon) ________________________________ Message 1 _____________________________________ Time: 07:14:20 AM PST US From: Art Zemon Subject: AeroElectric-List: Z-31 questions Folks, I am looking at Z-31B, to add a ground power jack to my plane. What is the symbol at the very bottom, labeled "GND PWR 2A"? It looks like a circuit breaker with an extra line. For a 14V airplane that will be visiting FBOs at smaller airports, is either the military style or the Piper style plug more common? When I had my Arrow, I carried my own jumper cable. Would it be reasonable to not carry that cable if I install the right jack in the plane? Thanks, -- Art Z. -- https://CheerfulCurmudgeon.com/ *"If I am not for myself, who is for me? And if I am only for myself, what am I? And if not now, when?" Hillel* ________________________________ Message 2 _____________________________________ Time: 08:31:51 AM PST US From: Bill Subject: Re: AeroElectric-List: Z-31 questions Hi Art, See chapter 1, figure 1-13 in the AeroElectric Connection. You'll find "Pullable" and "Switch/Breaker". The latter is the one you describe. Best, Bill On Sun, Aug 20, 2017 at 7:13 AM, Art Zemon wrote: > Folks, > > I am looking at Z-31B, to add a ground power jack to my plane. What is the > symbol at the very bottom, labeled "GND PWR 2A"? It looks like a circuit > breaker with an extra line. > > For a 14V airplane that will be visiting FBOs at smaller airports, is > either the military style or the Piper style plug more common? When I had > my Arrow, I carried my own jumper cable. Would it be reasonable to not > carry that cable if I install the right jack in the plane? > > Thanks, > -- Art Z. > > -- > https://CheerfulCurmudgeon.com/ > > *"If I am not for myself, who is for me? And if I am only for myself, what > am I? And if not now, when?" Hillel* > ________________________________ Message 3 _____________________________________ Time: 05:14:37 PM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Z-31 questions At 09:13 AM 8/20/2017, you wrote: >Folks, > >I am looking at Z-31B, to add a ground power jack to my plane. What >is the symbol at the very bottom, labeled "GND PWR 2A"? It looks >like a circuit breaker with an extra line. I showed a crew-openable breaker . . . either pullable or switch-breaker here . . . as a means by which the pilot can have control over ground power while at the controls. the one time I had to use ground power on my rental was in Kansas City. Overnight was -10F. The guy on the cart had his back to me when he applied ground power to the C172XP I was renting. EVERYTHING was lit up TOO bright . . .he had put 28v to my 14v airplane. With his back to me I couldn't get his attention and the stock GP jack for airplanes that year were hard-wired to the bus. In desperation I hit the starter and the engine thankfully lit right off . . . was spinning like gang-busters! As soon as he heard the engine catch, he shut the power off. I really wanted to climb out and fuss at him . . . but I wasn't going to shut the engine down after all that excitement. He smiled, waved and pulled the plug to wind up the cord. I waved . . . but I didn't smile. Everything was working okay so I came on back to Wichita. Anyhow, that's when I decided that pilot control of the ground power jack was a good idea . . . perhaps even ov protection. http://tinyurl.com/m85ohwx >For a 14V airplane that will be visiting FBOs at smaller airports, >is either the military style or the Piper style plug more common? >When I had my Arrow, I carried my own jumper cable. Would it be >reasonable to not carry that cable if I install the right jack in the plane? Can't say . . . both jacks are in service so I'll bet an FBO has both cables. The cable I carried on my excursions in rentals had jumper-cable clips on the supply end. Wanted to be able to crank from a car battery . . . usually as plentiful as ground power carts and it let you use a vehicle's battery too. Bob . . . ________________________________ Message 4 _____________________________________ Time: 07:13:22 PM PST US From: Art Zemon Subject: Re: AeroElectric-List: Z-31 questions Whoa, Bob, that's one heckuva story! Thanks for explaining. I had thought that the ground power jacks in my old Cherokees had been hardwired to the bus but, not having the wiring diagrams handy, I did not know for sure. Cheers, -- Art Z. On Sun, Aug 20, 2017 at 7:13 PM, Robert L. Nuckolls, III < nuckolls.bob@aeroelectric.com> wrote: > I showed a crew-openable breaker . . . either pullable or switch-breaker > here . . . as a means by which the pilot can have control over ground > power while at the controls. the one time I had to use ground power > on my rental was in Kansas City. Overnight was -10F. The guy on the > cart had his back to me when he applied ground power to the C172XP I > was renting. EVERYTHING was lit up TOO bright . . .he had put 28v to > my 14v airplane. With his back to me I couldn't get his attention > and the stock GP jack for airplanes that year were hard-wired to the > bus. > > In desperation I hit the starter and the engine thankfully lit > right off . . . was spinning like gang-busters! As soon as he > heard the engine catch, he shut the power off. I really wanted > to climb out and fuss at him . . . but I wasn't going to shut > the engine down after all that excitement. He smiled, waved and pulled > the plug to wind up the cord. I waved . . . but I didn't smile. > > Everything was working okay so I came on back to Wichita. Anyhow, > that's when I decided that pilot control of the ground power > jack was a good idea . . . perhaps even ov protection. > -- https://CheerfulCurmudgeon.com/ *"If I am not for myself, who is for me? And if I am only for myself, what am I? And if not now, when?" Hillel* ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message aeroelectric-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/AeroElectric-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/aeroelectric-list Browse Digests http://www.matronics.com/digest/aeroelectric-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.