• brian Rupnow's Avatar
    12-13-2017, 07:46 PM
    I've just had a ton of design work dumped on me, so this project might languish for a bit. Don't fight boys, I will be back.---Brian
    138 replies | 6955 view(s)
  • brian Rupnow's Avatar
    12-12-2017, 09:09 PM
    It might work--if I had any. This is intended to be a low budget project, using mainly materials that I already have. From what I can determine, the...
    138 replies | 6955 view(s)
  • brian Rupnow's Avatar
    12-12-2017, 08:03 PM
    Aostling--I had the good fortune to meet a hydraulic ram in person about 35 years ago. I met a lady who lived in an old hilltop farmhouse. The house...
    138 replies | 6955 view(s)
  • brian Rupnow's Avatar
    12-12-2017, 05:41 PM
    Decision has been made. The aluminum pistons simply aren't going to cut it. The problem I'm running into is too many pieces bolted together to allow...
    138 replies | 6955 view(s)
  • brian Rupnow's Avatar
    12-12-2017, 04:44 PM
    My Goodness--What a horrible day outside. We're getting lake effect snow coming in off Georgian Bay on the east side of Lake Huron and it's snowing...
    138 replies | 6955 view(s)
  • brian Rupnow's Avatar
    12-11-2017, 05:20 PM
    Here is the "running in" video. https://www.youtube.com/watch?v=waGnhHYoS4o
    138 replies | 6955 view(s)
  • brian Rupnow's Avatar
    12-11-2017, 11:02 AM
    If the pistons do the job without O-rings, then fine. If they don't I can buy rubber cup type seals similar to what are used in water pumps. The...
    138 replies | 6955 view(s)
  • brian Rupnow's Avatar
    12-10-2017, 09:03 PM
    I have made cast iron rings, and have had limited success with them----damned limited. As I mentioned earlier Viton o-rings are both a blessing and a...
    138 replies | 6955 view(s)
  • brian Rupnow's Avatar
    12-10-2017, 06:45 PM
    Aluminum is funny stuff. I know the theory of aluminum expanding at a higher rate than steel, but I have never had an engine seize because of it. I...
    138 replies | 6955 view(s)
  • brian Rupnow's Avatar
    12-10-2017, 04:59 PM
    It has been a snowy miserable weekend here and good wife has a cold, so I've spent more time than usual playing in my machine shop. The compressor is...
    138 replies | 6955 view(s)
  • brian Rupnow's Avatar
    12-09-2017, 03:04 PM
    This morning I reclaimed some of the 1/2" x 1 1/4" aluminum flatbar from my auto-reversing project and used it to make up the two cylinder supports....
    138 replies | 6955 view(s)
  • brian Rupnow's Avatar
    12-08-2017, 04:26 PM
    Any of my engines will run on steam. They might not run for a long time on steam, but I guarantee they will run on steam. We are now in the process...
    22 replies | 1339 view(s)
  • brian Rupnow's Avatar
    12-08-2017, 10:59 AM
    I had to set the timing on the valves by adjusting the positions of the eccentrics in relationship to the crankshaft position. Lots of oil, a prayer...
    22 replies | 1339 view(s)
  • brian Rupnow's Avatar
    12-07-2017, 04:44 PM
    The point is, I don't like having my ass chewed on. It is a steam engine. If I wanted to go to the bother of building a boiler and firebox, it would...
    22 replies | 1339 view(s)
  • brian Rupnow's Avatar
    12-07-2017, 04:34 PM
    The pistons, piston rods, yoke and slider are finished. The piston rod is one solid piece right now, and is Loctited and cross-pinned to the yoke. I...
    138 replies | 6955 view(s)
  • brian Rupnow's Avatar
    12-07-2017, 11:01 AM
    VA60rich--Thank you for the snide comment. How much have you contributed to this forum? How many builds have you posted about? How easy it is for...
    22 replies | 1339 view(s)
  • brian Rupnow's Avatar
    12-06-2017, 06:15 PM
    Like I said Sid--He is a master machinist. I spent my entire life as a design engineer. I've been machining for 7 years. He's been machining for 40.
    22 replies | 1339 view(s)
  • brian Rupnow's Avatar
    12-06-2017, 04:36 PM
    Today was yoke day. Nothing too exciting, just milling, drilling, sawing and tapping. The piece of 1/4" rod stuck through the yoke is going to become...
    138 replies | 6955 view(s)
  • brian Rupnow's Avatar
    12-06-2017, 02:45 PM
    I have a friend in Barrie who recently retired. He has been a master machinist/toolmaker/instructor all of his life, and had heard that I was...
    22 replies | 1339 view(s)
  • brian Rupnow's Avatar
    12-05-2017, 07:23 PM
    6061 it is. Nice stuff, but it really is too soft and gummy to lap well.
    138 replies | 6955 view(s)
  • brian Rupnow's Avatar
    12-05-2017, 05:41 PM
    Each cylinder has it's own piston now. The pistons are a lapped fit into the cylinders----as much as it can be. Lapping aluminum is a bit like trying...
    138 replies | 6955 view(s)
  • brian Rupnow's Avatar
    12-05-2017, 03:01 PM
    This morning I carved out a pair of cylinders from the cold rolled steel square stock. I still have to clean up the bores a little bit with a 3 stone...
    138 replies | 6955 view(s)
  • brian Rupnow's Avatar
    12-04-2017, 08:08 PM
    I clicked on the photo/link and it didn't take me anywhere.
    11 replies | 1039 view(s)
  • brian Rupnow's Avatar
    12-04-2017, 08:07 PM
    brian Rupnow replied to a thread Where to buy gears? in General
    McMaster Carr has a selection of small racks.
    27 replies | 1257 view(s)
  • brian Rupnow's Avatar
    12-04-2017, 06:41 PM
    Every project has to have a beginning. This is really too soon after my last project, the twin reversing steam engine, but I was bored today, and you...
    138 replies | 6955 view(s)
  • brian Rupnow's Avatar
    12-04-2017, 03:07 PM
    I will have to make it and see. This thing is small---It's only 5 1/4" from out to out of the pistons.
    138 replies | 6955 view(s)
  • brian Rupnow's Avatar
    12-04-2017, 02:14 PM
    Okay--A few changes. Biggest change is that we are going to aim for single acting. However--I have left sufficient room to add rod end caps to the...
    138 replies | 6955 view(s)
  • brian Rupnow's Avatar
    12-04-2017, 01:21 PM
    Well, this is getting asinine!! I stopped by my material supplier and priced a foot of 1 1/4" square brass for cylinders. Quoted price was...
    138 replies | 6955 view(s)
  • brian Rupnow's Avatar
    12-03-2017, 12:55 PM
    The second pink gear is not necessary. In fact, none of the gears are required. This compressor is a "whimsy", built not for it's usefulness as much...
    138 replies | 6955 view(s)
  • brian Rupnow's Avatar
    12-03-2017, 10:55 AM
    Time to ask a question. I have looked a great number of Scotch Yoke engines on the internet, and all of them are single acting. This doesn't mean...
    138 replies | 6955 view(s)
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About brian Rupnow

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Date of Birth
July 7, 1946 (71)
About brian Rupnow
Biography:
I am 69 years old, a design engineer by profession, and an amateur machinist.
Location:
Barrie, Ontario, Canada
Interests:
I build hotrods as a hobby, and have been involved in custom cars and drag racing most of my life.
Occupation:
I am a design engineer with 50 years experience designing prototype machinery and factory automation

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Brian Rupnow

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