Zen Flange

 

The setup of our reader, Itay

The setup of our reader, Itay

Figure 1: General Assembly Drawing

Our most popular 8mm pitot flange uses two 3D printed barbed nipples as connectors for pneumatic lines. That design is functional, yet the user is required to drill holes in the nipples with a 1mm drill, which can be quite a task. To alleviate that burden, we decided to produce a new nipple design, with the code-name Zen. The resulting flange is also easier to 3D print.

The assembly is fast and revolves around a signle 3D printed part (STL file). An assembly cheat-sheet can be seen in Figure 2.

Assembly Sheet

Figure 2: Assembly Sheet

Printed Zen Flange

Figure 3: Printed Zen Flange

The assembly procedure doesn’t consist but of trimming three tubes and gluing the whole thing together. Let the overall length of your probe be L(mm), in our example L=200. The overall length is defined as the distance from the tip of the probe to the back of the flange, excluding the nipples.

  1. The external pipe has an outer diameter of 8mm and an inner diameter of 6mm. A carbon fiber tube is a good choice. Trim it at L-18mm, which is 182mm in our example.
  2. Drill the static pressure ports on the outer pipe, at a distance of 36mm from the front pipe end. Drill 8 holes of 1mm diameter, 45° apart. This procedure is identical to our previous probe model.
  3. Cut a nipple of length of 10mm (refer to assembly sheet item 105), for example out of a brass tube, with outer diameter of 3mm and inner diameter of 2mm.
  4. Cut the total pressure pipe (item 104) at a length of L-7mm (193mm in our case), for example out of a brass tube, with outer diameter of 3mm and inner diameter of 2mm.
Rendered Section View

Figure 4: Rendered Section View

Video 1: Assembly Test Video

When you have prepared all the parts, make a little assembly check as per Video 1.

After a positive assembly check you can glue the pieces together. The important interface is that between the Pitot head (102) and the total pressure pipe (104). It is critical that this glue seal is airtight. Once you glue the external pipe (103) on the Pitot head you will not be able to repair any leaks.

Once you have glued all the parts together, you should test if the two pneumatic paths are free of obstacles and airtight. If it is available, a Pitot-static tester can be used. If not you can perform a quick test by following this simple procedure:

  1. Blow into the + nipple. The air should flow unobstructed down to the total pressure port.
  2. Seal the total pressure port with your finger and blow into the + hole. There should be no air leaks.
  3. Blow into the – nipple. The air should flow unobstructed down to the static pressure ports.
  4. Seal the static pressure ports with adhesive tape and blow into the – hole. There should be no leaks.

Congratulations! You have a new Pitot-static probe!

N10-006  
ICBB  
1Z0-060  
101-400  
352-001  
350-080  
c2010-657  
1z0-808  
1z0-434  
PR000041  
70-177  
JN0-360  
1Z0-051  
200-120  
MB2-704  
70-411  
CAS-002  
9A0-385  
70-270  
1Z0-803  
2V0-621D  
EX200  
CISM  
70-480  
OG0-091  
1Y0-201  
100-105  ,
N10-006  
MB2-707  ,
CISM  ,
PEGACPBA71V1  
M70-101  
2V0-620  ,
70-246  
300-206  ,
1Z0-061  ,
500-260  ,
100-105  ,
70-270  ,
70-463  
350-029  
500-260  
210-260  ,
9A0-385  
EX300  
9A0-385  ,
350-018  
350-050  
810-403  
220-802  
000-105  
210-065  
PEGACPBA71V1  ,
MB6-703  ,
OG0-093  
MB2-707  
9L0-066  

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