Ceengland
Joined: 11 Oct 2020
Posts: 391
Location: MS
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 Posted: Mon Nov 22, 2021 6:41 am Post subject: Static Air from Cockpit for Altimeter, Air Speed Indicator |
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On Fri, Nov 19, 2021 at 10:34 AM George Nielsen <genie(at)swissmail.org (genie(at)swissmail.org)> wrote:
| Quote: | --> Homebuilt-List message posted by: George Nielsen <genie(at)swissmail.org (genie(at)swissmail.org)>
As my Avid Flyer does not have any specialised orifices for static air
it uses cabin air for this purpose. (The air speed indicator is
connected to the pitot tube.) My plan is to connect these instruments to
a filter so that no dust or anything can enter their static air source.
Does anyone have a good idea on how to make such a filter connection or
where I can find one? Thanks.
George Nielsen
Avid Flyer I-66401
The Hague, the Netherlands
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Hi George,
The simplest way I can think of is to use a gasoline filter from a small engine with a 1/8" NPT fitting on one end; it will screw directly into the 1/8" NPT fittings found on panel instruments in the USA. Downside is having that weight hanging off the end of an instrument.
Another way is basically anything you'd see in this google search. That search was for 1/4" ID hose size, so you'd need an adapter to go from the typical 1/8" NPT fitting on the instrument to a 1/4" hose barb, and a short section of 1/4" ID rubber or plastic hose to connect to the filter. Ideally you'd be connecting multiple instruments, so you'd use 'T' fittings with the filter on the last 'T' in the chain.
The hose & thread sizes are common sizes in US instruments, but if yours are metric, I'd think that you'd have metric versions in Europe.
Charlie
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Charlie |
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