---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Fri 03/12/21: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 05:39 AM - Re: AC tug (rd2) 2. 07:39 PM - Re: Milspec wire followup: PTFE vs ETFE (Bob Kuc) ________________________________ Message 1 _____________________________________ Time: 05:39:01 AM PST US From: rd2 Subject: Re: AeroElectric-List: AC tug I found a used mobility scooter for $200.00, works well Very easy to convert and I have old batteries and the charge lasts a long time -->From: skywagon185guy Subject: Re: AeroElectric-List: AC tug Many times you can find those used small garden riding mowers for sale cheap. Throw the defunct mower section away, and tape up the cracked seat cushion and you might have a winner. ________________________________ Message 2 _____________________________________ Time: 07:39:09 PM PST US From: Bob Kuc Subject: Re: AeroElectric-List: Milspec wire followup: PTFE vs ETFE I was building a plastic plane. At sun-n-fun I while back ago, I bought wire from aren't vendor. It was labeled 20-3 uninsulated and was bundle in 100 ft rolls. Now I am building an rv7a and have some left over. Is there a way to tell if the wire I have is ok for use in airplane? Coating on wire is smooth and shiny and wire looks to be coated. Should I run.p and get fresh wire from spruce? Thanks Another Bob K. On Thu, Mar 11, 2021, 11:59 PM Charlie England wrote : > > > On Thu, Mar 11, 2021 at 10:48 AM Robert L. Nuckolls, III < > nuckolls.bob@aeroelectric.com> wrote: > >> At 11:22 AM 3/10/2021, you wrote: >> >> Question for Bob N. or others who've used a lot of milspec wire: >> I'm aware of the obvious differences between PTFE & ETFE; 'P' has higher >> temp rating but tends to 'cold flow'. I >> >> I'm pretty sure I've encountered PTFE in pre-built harnesses from some >> avionics mfgrs,=C3=82 based on the way the insulation strips,=C3=82 vs k nown-ETFE >> wire I have on hand. If we install with reasonable care, is there any >> reason to fear using PTFE for wiring throughout the airframe? >> >> >> PTFE (Teflon) is not 'more' desirable than ETFE (Tefzel) and >> it has some downsides. >> >> Greg Richter and I had some lengthy discussions on this >> about 17 years back after I reviewed his "Wiring for Smart People" >> publication. >> >> https://tinyurl.com/qxvr6nx >> >> I'm aware of no manufacturer that uses Teflon >> for general airframe wiring. Of perhaps 30000 >> feet of wire I have in inventory, I don't think >> there is a hundred feet of Teflon. >> >> Here's a copy of the Wire Bible which was >> updated on the website this morning. This is >> a searchable pdf file that will allow you to >> quickly identify about any wire product by >> specification. >> >> https://tinyurl.com/ydgacclw >> >> Having said that, Teflon is not 'evil'. If you >> got a heck of a deal on some I would not discourage >> it's use in avionics harnesses but it's kinda >> finicky to strip. >> >> https://tinyurl.com/bol9x2n >> >> >> >> >> Bob . . . >> > I'd agree that P is less desirable than E, because I'm not concerned abou t > extreme temp ratings and had minor concern about cold flow. I had spotted a > 'deal' on about 1K ft of P (IIRC, it was ID'd as M22759/9), but then foun d > the same quantity of E (M22759/16) for about a penny more per foot. Not a > big enough price delta for the hassle. > > Many thanks for the info; if I run across some P with a bigger price delt a > in the future, I may well add some to my 'inventory'. > > Charlie > > ------------------------------------------------------------------------------------- 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.