Author Topic: Edwards 5 Cylinders.  (Read 9573 times)

Offline glorfindel

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Re: Edwards 5 Cylinders.
« Reply #120 on: May 17, 2019, 04:55:49 PM »
Sliced 16 flanges yesterday!!

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Offline glorfindel

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Re: Edwards 5 Cylinders.
« Reply #121 on: May 21, 2019, 05:44:55 PM »
Those oil ring gave me some trouble!!!



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Offline glorfindel

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Re: Edwards 5 Cylinders.
« Reply #122 on: June 04, 2019, 12:57:57 PM »
That will be about it for now guys. I'm out for about 2 month!!!

To do list:

-Intakes/exhaust tubes.

-Taping 1/4-32 glow plug threads.

-Electrical circuit for the glow plugs.

I hope my first protoype will work. I already have new ideas for my own design based on the Edwards.



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Offline glorfindel

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Re: Edwards 5 Cylinders.
« Reply #123 on: September 05, 2019, 04:19:58 PM »
I'm back!! ;-)

Here is my solution to not have to bent the 115° elbow in the intake tubes.

I 3d printed an elbow at 115° with PVC material.

On the pic, i also did the 45°, but i will bend it instead (this one is easy)

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Offline petertha

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Re: Edwards 5 Cylinders.
« Reply #124 on: September 08, 2019, 06:37:39 AM »
I'm going through a similar induction tube exercise on my radial, but it has an even more convoluted 3D path. I'm getting satisfactory bending & flaring results using 5/16"  aluminum Versatube. Now I am experimenting with different ways to make a joint from 2 pipe segments to simplify matters & not look too hideous. Pic shows an aluminum sleeve jointed with JB weld or aluminum epoxy since heat isnt really a concern on the induction pipe. (Its just a scrap piece, only one end would be flared). This isn't final but shows promise. I've also been hunting for thin walled silicon tubing to make an assembly joint because I'm not even sure I can get a rigid pipe into the head port with its threaded fitting & then down into the carb manifold O-ring fitting. A flexible outer tube sleeve isn't pretty but function rules over aesthetics. Heck, even 'real' engines use rubber where its required. The current design looks like something that will give me seal grief.

https://www.aircraftspruce.ca/catalog/mepages/3003versatube.php?clickkey=17152

Offline Admiral_dk

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Re: Edwards 5 Cylinders.
« Reply #125 on: September 08, 2019, 09:35:33 PM »
Looks like you get at a very good and even result from your flaring tool  :ThumbsUp:

I do understand why you would like to use the 3D printed tubes, but I'm not sure they will withstand the heat from the engine ....

Offline glorfindel

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Re: Edwards 5 Cylinders.
« Reply #126 on: September 10, 2019, 12:38:17 PM »
Looks like you get at a very good and even result from your flaring tool 

I do understand why you would like to use the 3D printed tubes, but I'm not sure they will withstand the heat from the engine ....
It's not pretty, but it will work. I can print it in different material and pvc will hold temp and manage fuel.

If not, i'll have to make some jigs and bend the tubes ;-)

This is a prototype, looking good is not my priority.

Maybe some day i'll learn the art of bending tubes tho ;-)

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