Today's Message Index:
----------------------
1. 03:54 AM - Re: Next Generation Z-Figures (pilot_pat)
2. 04:29 AM - Re: Plumbing Instruments (racerjerry)
3. 06:33 AM - Re: Plumbing Instruments (Christopher Cee Stone)
4. 06:57 AM - Re: Plumbing Instruments (Ernest Christley)
5. 09:26 AM - Re: Plumbing Instruments (Sebastien)
6. 09:30 AM - Re: Plumbing Instruments (Sebastien)
Message 1
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| Subject: | Re: Next Generation Z-Figures |
Please advise where I may find the "copious notes including a pre-flight checklist
that will exercise all functionalities before launching into the blue."
I understand if they are not issued yet; I did try to find them.
Thanks
Pat
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=501403#501403
Message 2
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| Subject: | Re: Plumbing Instruments |
I ran into a problem with Nylon fittings about 25 years ago during my very first
solo flight of my then recently completed ultralight aircraft. Most Nylon fittings
are injection molded (not machined), leaving a tiny seam at the mold parting
line. During climbout, airspeed read significantly LOW (right at published
stall speed) and scared the CRAP out of me. A few other problems, like
motorcycle type windscreen collapsing into my lap didn't help either.
Nylon fittings work well if you recognize that they MAY leak. Pitot and Static
systems must be leak tested before first flight. EASY! Insert an altimeter
into each system; pump it up to 10,000 feet and witch for a slow decay. If it
has not lost more that 1,000 feet after one minute, you are good to go.
Yes, Teflon tape on pipe threads will help attain a seal; just make sure that whenever
the fitting is removed that you take extra care to remove all traces of
tape remnants from the inside of the female threads. And don't over-tighten
fittings as the wedge action of pipe threads may easily split plastic instrument
cases.
Jerry King
--------
Jerry King
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=501405#501405
Message 3
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| Subject: | Re: Plumbing Instruments |
No tape! Teflon or otherwise. It will extrude out of the threads as tiny
slivers and enter the system with less than desirable consequences.
Use a joint compound that is plastc compatible.
Loctite thread sealer 5772 or Loctite thread sealant with PTFE 1527514
.chris stone
RV-8
On Thu, Apr 15, 2021 at 7:20 PM rparigoris <rparigor@hotmail.com> wrote:
> rparigor@hotmail.com>
>
> Hi Group In process of wiring and plumbing instruments. Question: I have
> Male Nylon 1/8" NPT hose nipples going into metal female threads on Dynon
> D10A and Altimeter. Should any thread compound or tape be applied before
> assembly? Thx. Ron P.
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=501400#501400
>
>
Message 4
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| Subject: | Re: Plumbing Instruments |
Better yet, use plastic fittings.=C2- They'll deform to seal the mate co
mpletely.=C2- It's not like they have to deal with any heat or pressure,
or carry any load.
Message 5
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| Subject: | Re: Plumbing Instruments |
The restriction against Teflon tape applies to oil and fuel hoses. It has
no bearing on pitot or static connections. There are tens of thousands of
amateur built and certified aircraft flying around with Teflon tape on the
NPT ends of the fittings without consequence. Note that the tape is
only useful on the NPT ends, there is no benefit to adding it to the
compression end of the fittings.
On Fri, Apr 16, 2021 at 6:40 AM Christopher Cee Stone <rv8iator@gmail.com>
wrote:
> No tape! Teflon or otherwise. It will extrude out of the threads as tiny
> slivers and enter the system with less than desirable consequences.
>
> Use a joint compound that is plastc compatible.
>
> Loctite thread sealer 5772 or Loctite thread sealant with PTFE 1527514
>
> .chris stone
> RV-8
>
> On Thu, Apr 15, 2021 at 7:20 PM rparigoris <rparigor@hotmail.com> wrote:
>
>> rparigor@hotmail.com>
>>
>> Hi Group In process of wiring and plumbing instruments. Question: I have
>> Male Nylon 1/8" NPT hose nipples going into metal female threads on Dynon
>> D10A and Altimeter. Should any thread compound or tape be applied before
>> assembly? Thx. Ron P.
>>
>>
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=501400#501400
>>
>>
>>
>>
>>
>>
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Message 6
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| Subject: | Re: Plumbing Instruments |
I believe the original poster said they were using Nylon fittings. While
these fittings will seal better than metal ones without tape, they will
still seal better with tape.
On Fri, Apr 16, 2021 at 7:05 AM Ernest Christley <echristley@att.net> wrote:
> Better yet, use plastic fittings. They'll deform to seal the mate
> completely. It's not like they have to deal with any heat or pressure, or
> carry any load.
>
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