Author Topic: Edwards 5 Cylinders.  (Read 12735 times)

Offline glorfindel

  • Full Member
  • ****
  • Posts: 97
Re: Edwards 5 Cylinders.
« Reply #120 on: May 17, 2019, 04:55:49 PM »
Sliced 16 flanges yesterday!!

Envoyé de mon SM-G965W en utilisant Tapatalk


Offline glorfindel

  • Full Member
  • ****
  • Posts: 97
Re: Edwards 5 Cylinders.
« Reply #121 on: May 21, 2019, 05:44:55 PM »
Those oil ring gave me some trouble!!!



Envoyé de mon SM-G965W en utilisant Tapatalk


Offline glorfindel

  • Full Member
  • ****
  • Posts: 97
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.



Envoyé de mon SM-G965W en utilisant Tapatalk


Offline glorfindel

  • Full Member
  • ****
  • Posts: 97
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)

Envoyé de mon SM-G965W en utilisant Tapatalk


Offline petertha

  • Full Member
  • ****
  • Posts: 323
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

  • Full Member
  • ****
  • Posts: 1877
  • Søften - Denmark
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

  • Full Member
  • ****
  • Posts: 97
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 ;-)

Envoyé de mon SM-G965W en utilisant Tapatalk


Offline glorfindel

  • Full Member
  • ****
  • Posts: 97
Re: Edwards 5 Cylinders.
« Reply #127 on: December 23, 2019, 05:19:54 PM »
Glow driver circuit done.

Envoyé de mon SM-G965W en utilisant Tapatalk


Offline petertha

  • Full Member
  • ****
  • Posts: 323
Re: Edwards 5 Cylinders.
« Reply #128 on: December 23, 2019, 09:22:38 PM »
Tell us more! From existing schematic or your own design? What are the specs? (input voltage, output voltage & current level per plug circuit).

Offline glorfindel

  • Full Member
  • ****
  • Posts: 97
Re: Edwards 5 Cylinders.
« Reply #129 on: December 24, 2019, 11:53:06 AM »
Tell us more! From existing schematic or your own design? What are the specs? (input voltage, output voltage & current level per plug circuit).
I forgot to take a pic of the electrical drawing!!! I'll do it when i go back to work.

Input will be lipo 7.2V, it can support up to 5amp each/25amp total (25amp fuse) and output is adjustable ( the little blue thing with a screw on top), but set to 1.5V

It's five times the same little circuit.

The thing could have been more complex/efficient, but this one will work.

I'm getting very close to do my first start!!!

Envoyé de mon SM-G965W en utilisant Tapatalk

Offline petertha

  • Full Member
  • ****
  • Posts: 323
Re: Edwards 5 Cylinders.
« Reply #130 on: December 24, 2019, 03:37:32 PM »
Awesome. I'm going to need something like that for my (Ohrndorf) 5-cyl glow radial. I have the LiPos & charging gear. I assume you designed the circuit yourself because I haven't seen one quite with those specs. Good luck with the Edwards start, keep us posted. Happy Holidays.

Offline glorfindel

  • Full Member
  • ****
  • Posts: 97
Re: Edwards 5 Cylinders.
« Reply #131 on: December 25, 2019, 04:02:02 PM »
Awesome. I'm going to need something like that for my (Ohrndorf) 5-cyl glow radial. I have the LiPos & charging gear. I assume you designed the circuit yourself because I haven't seen one quite with those specs. Good luck with the Edwards start, keep us posted. Happy Holidays.
I'll give you the drawing, no problem.

Envoyé de mon SM-G965W en utilisant Tapatalk


Offline glorfindel

  • Full Member
  • ****
  • Posts: 97
Re: Edwards 5 Cylinders.
« Reply #132 on: January 03, 2020, 03:04:48 PM »
Here is the drawing.

Envoyé de mon SM-G965W en utilisant Tapatalk


Offline Admiral_dk

  • Full Member
  • ****
  • Posts: 1877
  • Søften - Denmark
Re: Edwards 5 Cylinders.
« Reply #133 on: January 03, 2020, 08:14:09 PM »
Thank you for the schematic - but I'm sorry to say that there's an error (or five) on it as all the 2N2905 are wrongly connected - or should I say that you have swapped the Collector and Emitter pins on them  :old:

There's also the possibility that the symbols are wrong in the library for the software  :thinking:

Best wishes

Per

Offline glorfindel

  • Full Member
  • ****
  • Posts: 97
Re: Edwards 5 Cylinders.
« Reply #134 on: January 03, 2020, 08:33:15 PM »
Thank you for the schematic - but I'm sorry to say that there's an error (or five) on it as all the 2N2905 are wrongly connected - or should I say that you have swapped the Collector and Emitter pins on them  :old:

There's also the possibility that the symbols are wrong in the library for the software  :thinking:

Best wishes

Per
It's a friend at our electronic department who made it.

Maybe the board is connected the right way??

I'll address your concern monday and will come back with an answer. ;-)

Envoyé de mon SM-G965W en utilisant Tapatalk