Matronics Email Lists Forum Index Matronics Email Lists
Web Forum Interface to the Matronics Email Lists
 
 Get Email Distribution Too!Get Email Distribution Too!    FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

Static Air from Cockpit for Altimeter, Air Speed Indicator

 
Post new topic   Reply to topic    Matronics Email Lists Forum Index -> Homebuilt-List
View previous topic :: View next topic  
Author Message
genie(at)swissmail.org
Guest





PostPosted: Mon Nov 22, 2021 7:43 am    Post subject: Static Air from Cockpit for Altimeter, Air Speed Indicator Reply with quote

Hi Charlie,


Thank you for the advice. I did not know that one could find such small gasoline filters. That does make sense. I think that I will connect the instruments with T-fittings. I will have to check but I believe that they use fittings in inches so I will look for a 1/4" fitting or an adapter to go from 1/8" to 1/4".


George



On 22-Nov-21 15:39, Charlie England wrote:

Quote:




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


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






- The Matronics Homebuilt-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?Homebuilt-List
Back to top
Display posts from previous:   
Post new topic   Reply to topic    Matronics Email Lists Forum Index -> Homebuilt-List All times are GMT - 8 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum


Powered by phpBB © 2001, 2005 phpBB Group