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Venturi without mesh screen (installation) --- Enya Rear Induction engines too! Cox_ba12





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Venturi without mesh screen (installation) --- Enya Rear Induction engines too! Empty

Venturi without mesh screen (installation) --- Enya Rear Induction engines too!

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Venturi without mesh screen (installation) --- Enya Rear Induction engines too! Empty Venturi without mesh screen (installation) --- Enya Rear Induction engines too!

Post  sosam117 Sat Jul 24, 2021 3:29 pm

Hello Cox Forum Members,

Have you ever ordered a Tee Dee venturi and there is a groove for the mesh screen but there is no screen?

Venturi without mesh screen (installation) --- Enya Rear Induction engines too! 01_ven10


Well, I decided I was tired of venturi without screens and did something about it.
Below is what it took to get screens on all of my Tee Dees that the venturi with the mesh screen groove but didn’t have the screens installed.

Venturi without mesh screen (installation) --- Enya Rear Induction engines too! 12_fin10


1st thing was to get the correct mesh screen count that Cox used. Cox used a 60-mesh count screen. I did this by carefully measuring the one venturi I had that had a mesh screen installed. Then I went on-line to get a mesh screen that was the same count (per inch).
Venturi without mesh screen (installation) --- Enya Rear Induction engines too! 02_60-10


Next was to figure out the diameter size needed to fit the venturi correctly (into the groove).
I found out the 3/8” diameter was the correct size (after many trials of sizes: inch and metric).

Venturi without mesh screen (installation) --- Enya Rear Induction engines too! 03_scr10
Venturi without mesh screen (installation) --- Enya Rear Induction engines too! 04_thr10


After I punched out the screen to 3/8 dia., I rolled the screen over a 5/16 ball to make it domes shape to insert the screen into the groove into the venturi.
Venturi without mesh screen (installation) --- Enya Rear Induction engines too! 05_scr10


Next was to make sure that all of the screen was in the groove.
Venturi without mesh screen (installation) --- Enya Rear Induction engines too! 06_scr10
Venturi without mesh screen (installation) --- Enya Rear Induction engines too! 07_scr10


The next step was to use a ruler and flatten the screen down to seat it into the groove into the venturi.
I used a metal 6 inch ruler to flatten the screen.

Venturi without mesh screen (installation) --- Enya Rear Induction engines too! 08_scr10
Venturi without mesh screen (installation) --- Enya Rear Induction engines too! 09_rul10
Venturi without mesh screen (installation) --- Enya Rear Induction engines too! 10_bef10


Photo of before and after the screen mesh flattening is below:
Venturi without mesh screen (installation) --- Enya Rear Induction engines too! 10_bef11
Venturi without mesh screen (installation) --- Enya Rear Induction engines too! 11_bef10


And that is it! A Cox Tee Dee venturi with the mesh screen installed in the venturi.

I did play around with a 10mm dia. Screen, which seats in the groove as well.
The plus with the 10mm diameter screen is, you use your thumb to carefully press down on the screen to seat it in the groove. With the diameter being oversized you’ll get a domed shape screen in your venturi and it will look like one of those high performance intakes?


Venturi without mesh screen (installation) --- Enya Rear Induction engines too! 12_fin11
Venturi without mesh screen (installation) --- Enya Rear Induction engines too! 13_ven10


Last edited by sosam117 on Sun Jul 25, 2021 6:34 pm; edited 1 time in total (Reason for editing : Title --- Enya Reed engines as well.)
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Post  944_Jim Sat Jul 24, 2021 3:45 pm

Good job, and thanks for the write-up. I have a sneaking feeling the screen may improve fuel draw a bit too.
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Post  KariFS Sat Jul 24, 2021 3:47 pm

Hey, that’s pretty cool! So the mesh just stays there, no need to punch in the lip on the venturi or anything like that?

I have a couple of old Tee Dees with the mesh missing, and a piece of stainless really high-count mesh somewhere, definitely need to try that!

What is that punch-tool thing that you used?
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Post  rsv1cox Sat Jul 24, 2021 3:56 pm

All stars, great effort, great result!
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Post  Ken Cook Sat Jul 24, 2021 4:16 pm

I like it and I see use for doing so. I have several H&R fuel filters that have the screen mesh missing. These are quite small inline filters that H&R used to produce and are now offered by Brodak. Replacement screens aren't offered. I haven't tried the Brodak version and I would venture to say that if it could be cheapened, it was. When these were taking apart for cleaning and one tried to blow out any residual dirt in the screen, you lost it forever. That's when I learned to clean the screen, hold it with needle nose and light it on fire. I never lost one since but I have several without screens. I tried the mesh screen from the top of Cox fuel cans but they were just a bit too small.
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Post  davidll1984 Sat Jul 24, 2021 4:53 pm

This is a nice ad i like this Me by pure chance I found a screen that came from a carburetor kit for a Weed wacker de screen was exactly Perfect for a .049 tee dee ventury Small Cox Logo Babe Bee .049 RC Plane
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Post  balogh Sat Jul 24, 2021 5:27 pm

Been there done that on KB intakes. Used a 13mm Oring hooked twisted around the fuel nipple and the NV seal tube, holds the mesh screen down as a yoke.

Venturi without mesh screen (installation) --- Enya Rear Induction engines too! 20200713

Another time I added a screen from a bathtub tap and fixed it on the TD09 venturi with the neck cut off of a balloon:
Venturi without mesh screen (installation) --- Enya Rear Induction engines too! 20190613


Helped improve the fuel draw a bit
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Post  sosam117 Sat Jul 24, 2021 9:47 pm

KariFS wrote:Hey, that’s pretty cool! So the mesh just stays there, no need to punch in the lip on the venturi or anything like that?

I have a couple of old Tee Dees with the mesh missing, and a piece of stainless really high-count mesh somewhere, definitely need to try that!

What is that punch-tool thing that you used?

The venturi already has a lip that was made during machining, the next step was to install the mesh screen like I did.
I do the same thing when I install a screen on the Bee engine's back plates.
Though I use a smaller ball (to curve the screen) and the screen purchased from either Matt or Burnie.
Then insert it into the back plate and flatten out the screen.

The punch set I used is from Precision Brand Products, Inc.
They are just up the road from me  in Dowers Grove and I purchased the metric and inch sets from them.
The "ThruPunch" inch sets (two of them) I have go from 1/8" to 3/4", and the 7/8" to 1-1/4"
(set #1 -- 1/8, 3/16, 1/4, 5/16, 3/8, 7/16, 1/2, 5/8, 3/4)
(set #2 -- 7/8, 1, 1-1/8, 1-1/4)
The metric "ThruPunch sets goes from 3mm to 20mm ( 3, 4, 5, 6, 7, 8, 10, 12, 16, 20mm)

Their address is:
2250 Curtis Street
Downers Grove, ILLinois 60515 U.S.A

website is:
www.precisionbrand.com

I also use their "ABC Blackener" and "Tool Blackener" to get the black finish on the cylinders and starter springs
https://precisionbrand.com/product-category/blackeners/

Nice little store in a industrial section of Downers Grove.
hard to find the store if you do not know what you are looking for?


Last edited by sosam117 on Sat Jul 24, 2021 9:59 pm; edited 1 time in total (Reason for editing : Screen lip -- already there.)
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Post  sosam117 Sat Jul 24, 2021 10:19 pm

The punch sets I have have been very useful since I purchased them in 2018.
They have helped in making cylinder head shims, shims for crankshafts (thrust shims -- from copper).
Washers, and other things.

They have come in handy when I have been rebuilding my engines.
The crankshaft play has been reduced (because of using a started on them)
Helped in SPI timing and making thrust bushing behind the prop driver and shimming between the crankcase housing and the thrust washer to reduce the crank end play, so the crank  doesn't rub against the backplate or reed cage.

Venturi without mesh screen (installation) --- Enya Rear Induction engines too! _die_i10
Venturi without mesh screen (installation) --- Enya Rear Induction engines too! _hole_10
Venturi without mesh screen (installation) --- Enya Rear Induction engines too! Finish11

Venturi without mesh screen (installation) --- Enya Rear Induction engines too! Assy_f10
Venturi without mesh screen (installation) --- Enya Rear Induction engines too! Head-c10
Venturi without mesh screen (installation) --- Enya Rear Induction engines too! 11-atd10

Venturi without mesh screen (installation) --- Enya Rear Induction engines too! 10-hea10
Venturi without mesh screen (installation) --- Enya Rear Induction engines too! 07aa-s10
Venturi without mesh screen (installation) --- Enya Rear Induction engines too! Texaco24
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Post  sosam117 Sun Jul 25, 2021 5:18 pm

Sending a dozen mesh screens to KariFS.

Venturi without mesh screen (installation) --- Enya Rear Induction engines too! Img_0082
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Post  rsv1cox Sun Jul 25, 2021 6:03 pm

I Love This Forum!
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Venturi without mesh screen (installation) --- Enya Rear Induction engines too! Empty Installing mesh screens on my Enya Rear Induction Reed engines.

Post  sosam117 Sun Jul 25, 2021 6:32 pm

Well since I got KariFS Tee Dee mesh screens done.
I decided to move on to the other engines that needed the mesh screens installed.

Yes they are not Cox engines but Enya rear induction reed engines.
The photo is only three of the eleven Enya rear induction reeds engines I have.
A mix of Enya .049 and Enya .06 Reed engines.

Venturi without mesh screen (installation) --- Enya Rear Induction engines too! Img_0083

The next photos show that these venturi do not have the mesh screens as well.
Venturi without mesh screen (installation) --- Enya Rear Induction engines too! Img_0084
Venturi without mesh screen (installation) --- Enya Rear Induction engines too! Img_0085


I do have one Enya reed engine that has a mesh screen that I repaired with JB Weld a few months ago.
Venturi without mesh screen (installation) --- Enya Rear Induction engines too! Enya_093


That engine had the mesh screen and a clip.
But as you can see, Enya used a brass screen where I'll be installing a stainless steel screen.

Venturi without mesh screen (installation) --- Enya Rear Induction engines too! Enya_094


So, I measured the recessed diameter in the venturi and it measured 6mm.
Venturi without mesh screen (installation) --- Enya Rear Induction engines too! Img_0086


Next  was to punch out a dozen mesh screens for the engines.
Venturi without mesh screen (installation) --- Enya Rear Induction engines too! Img_0087


Then to make the clips to hold the screens in place.
I used the 5mm punch to bend the .020" music wire around.

Venturi without mesh screen (installation) --- Enya Rear Induction engines too! Img_0088


Then I used my Dremel to cut the wire loops into "C" clips to hold the screens.
Venturi without mesh screen (installation) --- Enya Rear Induction engines too! Img_0089


And last was to install the mesh screen and the clip into the Enya's venturi.
Venturi without mesh screen (installation) --- Enya Rear Induction engines too! Img_0090


I did this to the other three I had there on my bench.
Venturi without mesh screen (installation) --- Enya Rear Induction engines too! Img_0091


Now on to getting the other Enya rear induction reeds done, just like these three.


Last edited by sosam117 on Sun Jul 25, 2021 6:39 pm; edited 1 time in total (Reason for editing : brass screen verses stainless screen.)
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Post  davidll1984 Sun Jul 25, 2021 8:22 pm

Thumbs Up  this is Somting cool sosam117 enya Very beautiful works Well done that should protect the engine
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Post  KariFS Thu Aug 05, 2021 9:54 pm

Busy day at the mailbox of Kari’s Sanctuary of Neglected Little Engines!

Thanks again Mike!

Venturi without mesh screen (installation) --- Enya Rear Induction engines too! D2726110
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Post  sosam117 Fri Aug 06, 2021 2:39 pm

Kari,
Glad I could help you out on making those screens for your Cox engines.
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