Author Topic: another Snow engine  (Read 157729 times)

Offline vcutajar

  • Full Member
  • *****
  • Posts: 2555
  • Marsascala, MALTA
Re: another Snow engine
« Reply #525 on: October 30, 2016, 09:19:46 PM »
Thanks for the update Achim.  Still following along.  Why is it that the final parts take so long to make?

Vince

Offline fumopuc

  • Full Member
  • *****
  • Posts: 3231
  • Munich, Germany, EU
Re: another Snow engine
« Reply #526 on: October 30, 2016, 11:37:14 PM »
Thanks for the update Achim.  Still following along.  Why is it that the final parts take so long to make?

Vince

Hi Vince, may be because we postpone them to the end and we excuse oneself by doing easier or nicer things in advance ?
« Last Edit: October 31, 2016, 02:54:20 PM by fumopuc »
Kind Regards
Achim

Offline cwelkie

  • Full Member
  • ****
  • Posts: 195
Re: another Snow engine
« Reply #527 on: October 31, 2016, 01:03:31 PM »
I'm silently watching from the sidelines in great admiration for your work on this engine and its display.  It is coming along beautifully.  I imagine you are savouring every part along the way.
Charlie

Offline fumopuc

  • Full Member
  • *****
  • Posts: 3231
  • Munich, Germany, EU
Re: another Snow engine
« Reply #528 on: October 31, 2016, 03:02:17 PM »
Roger, Don,  Dave and Charlie, thanks for watching and the friendly words.

This morning the hole for the water plumbing fixation was made.
I have used the little Proxxon drill press for it and made it moveable. Let`s call it Chris (crueby) method.
Also the thread cutting could be done with the chuck of the drill press, turning it by hand and adjusting the lever with the other hand.
So the water plumbing is fixed now at a specified position and the exhaust has to pass it now, hopefully.
Kind Regards
Achim

Online Roger B

  • Global Moderator
  • Full Member
  • *****
  • Posts: 6133
  • Switzerland
Re: another Snow engine
« Reply #529 on: October 31, 2016, 03:11:03 PM »
When I use my little Proxxon drill for tapping I always take off the cover, remove the drive belt and turn the pulley by hand.
Best regards

Roger

Offline crueby

  • Full Member
  • *****
  • Posts: 18554
  • Rochester NY
Re: another Snow engine
« Reply #530 on: October 31, 2016, 03:17:46 PM »
Its definitely handy to be able to take that drill press to the work for baseplates that would be too hard to hold on a larger floor standing drill press.

Offline fumopuc

  • Full Member
  • *****
  • Posts: 3231
  • Munich, Germany, EU
Re: another Snow engine
« Reply #531 on: November 06, 2016, 04:12:20 PM »
At the end of a whole day fiddling around I learned a very important lesson, which means that my CAD and my model is very close.
I have tried to go ahead with the exhaust manifold, but I had to recognize and accept, that my bending with r=22 mm for the 7 mm brass tube is working nice, but this pipe bend does not fit in this application. 
The first bending has shown it already and also the attempt to bend 120° instead of 90° was not successful.
Good to know that the CAD does give a confirmation.
I will try it with a smaller bend radius, but that means to make some new tools.
Kind Regards
Achim

Offline vcutajar

  • Full Member
  • *****
  • Posts: 2555
  • Marsascala, MALTA
Re: another Snow engine
« Reply #532 on: November 06, 2016, 08:23:22 PM »
Hi Achim.  I don't know if I am going to suggest something stupid, but here goes.  How about making a 90 degree elbow?

Vince

Offline fumopuc

  • Full Member
  • *****
  • Posts: 3231
  • Munich, Germany, EU
Re: another Snow engine
« Reply #533 on: November 13, 2016, 04:52:39 PM »
Hi Vince, yes a 90° elbow with a radius less than 18mm could solve the problem.
Unfortunately I do not have  the tools for my bending system, so I have to make them.
The bending with the radius of 22 mm is already a challenge for the 7x0,3 mm brass tube so I have change my mind and didnīt try it with the smaller bending radius.


The final and very easy solution is shown in the two pictures now.
"Mr. Doug Kelley, I apologize for not staying with your excellent design, but sometimes a very special task does need an easy solution."
Kind Regards
Achim

Offline crueby

  • Full Member
  • *****
  • Posts: 18554
  • Rochester NY
Re: another Snow engine
« Reply #534 on: November 13, 2016, 05:32:29 PM »
Here is another way of making elbows/tees with no bending, turned parts then soldering:

http://www.modelenginemaker.com/index.php/topic,5980.msg127633.html#msg127633

Online Roger B

  • Global Moderator
  • Full Member
  • *****
  • Posts: 6133
  • Switzerland
Re: another Snow engine
« Reply #535 on: November 13, 2016, 07:48:25 PM »
A nice solution to the problem  :ThumbsUp:  :ThumbsUp:  :wine1:
Best regards

Roger

Offline fumopuc

  • Full Member
  • *****
  • Posts: 3231
  • Munich, Germany, EU
Re: another Snow engine
« Reply #536 on: November 27, 2016, 06:11:55 PM »
Hi everybody, a dark and wet day here in Munich so it was shop time.
Some soldering was done and the exhaust manifold is nearly finished.
A hard solder was used to fit the 4 straight short tube pieces into the collector pipe.
First picture shows the final mock up which was made.
The position, length of the single pipes in the flanges, was marked with a scriber followed by the next partly disassembly of the engine.
The already at the intake manifold proofed heat isolation set up was made with the 1 mm SS wire again.
Some heat protection with aluminium sheet, has given enough covering for not melting  the paint/powder again.
The flux is from the local plumber shop and the soft solder has a melting point at 220°C so an easy job for the micro torch.
Finally the manifold polished and again fitted together with the engine.
Next to do, a muffler.

« Last Edit: November 28, 2016, 08:53:03 PM by fumopuc »
Kind Regards
Achim

Offline fumopuc

  • Full Member
  • *****
  • Posts: 3231
  • Munich, Germany, EU
Re: another Snow engine
« Reply #537 on: November 27, 2016, 06:25:30 PM »
... and the muffler.
The rest of a 25 mm brass tube and some fittings from the plumber shop.
The body, 25 mm tube with side plates, was fixed with silver solder, the rest with soft solder.
Kind Regards
Achim

Online Roger B

  • Global Moderator
  • Full Member
  • *****
  • Posts: 6133
  • Switzerland
Re: another Snow engine
« Reply #538 on: November 27, 2016, 07:48:22 PM »
Not long now  :ThumbsUp:  :ThumbsUp: I like the way you space the flanges with some lengths of wire to reduce heat transfer  :praise2: I might try your muffler design for my vertical engine  :wine1:
Best regards

Roger

Offline Dave Otto

  • Full Member
  • *****
  • Posts: 4693
  • Boise, Idaho USA
    • Photo Bucket
Re: another Snow engine
« Reply #539 on: November 27, 2016, 08:55:00 PM »
Nice progress and update Achim.

I really like the way the exhaust manifold turned out; I tend to like it better that one stock one with the curved pipes. The muffler also turned out great!
Like Roger said; good idea using the wire to space the flanges; I will file this one away for use in the future.


Dave

 

SimplePortal 2.3.5 © 2008-2012, SimplePortal