• brian Rupnow's Avatar
    10-15-2017, 08:37 PM
    brian Rupnow replied to a thread Back to Steam-- in General
    Sid--It looks very deceiving, because the crank webs are not parallel sided, but are triangular shaped. The crank is quartered. As far as increasing...
    190 replies | 13553 view(s)
  • brian Rupnow's Avatar
    10-15-2017, 03:41 PM
    brian Rupnow replied to a thread Back to Steam-- in General
    JTiers--There is a world of sliding parts on something like this. Aside from rotational stiffness between the crankshaft and it's bearings and the...
    190 replies | 13553 view(s)
  • brian Rupnow's Avatar
    10-15-2017, 02:54 PM
    brian Rupnow replied to a thread Back to Steam-- in General
    I think I fixed it. Somebody please let me know.---Brian
    190 replies | 13553 view(s)
  • brian Rupnow's Avatar
    10-15-2017, 01:26 PM
    brian Rupnow replied to a thread Back to Steam-- in General
    As I promised, here is a YouTube video of the engine to date, and a top view, showing the soldered piston to piston rod connection. I noticed after...
    190 replies | 13553 view(s)
  • brian Rupnow's Avatar
    10-15-2017, 07:19 AM
    brian Rupnow replied to a thread Back to Steam-- in General
    Today we're going to change things up a bit from the original Stuart engine. The piston will have one 1/16" diameter Viton o-ring. The piston rod is...
    190 replies | 13553 view(s)
  • brian Rupnow's Avatar
    10-14-2017, 07:05 PM
    brian Rupnow replied to a thread Back to Steam-- in General
    Okay--I have to say it--I'm stoked!!! It has been a long and busy day, but the first stage of assembly has been a great success. I completed the...
    190 replies | 13553 view(s)
  • brian Rupnow's Avatar
    10-14-2017, 03:43 PM
    brian Rupnow replied to a thread Back to Steam-- in General
    Well actually---It's all assembled now, and I'm very pleased. Everything goes up and down and round and round, without any interferences.--And, if I...
    190 replies | 13553 view(s)
  • brian Rupnow's Avatar
    10-14-2017, 09:40 AM
    brian Rupnow replied to a thread Back to Steam-- in General
    I don't have the equipment to weld aluminum. I did consider opening the hole a bit more, J B welding in a cheater bushing and going that route. I...
    190 replies | 13553 view(s)
  • brian Rupnow's Avatar
    10-13-2017, 07:03 PM
    brian Rupnow replied to a thread Back to Steam-- in General
    I don't have a particularly good answer for that, other than "$hit happens".
    190 replies | 13553 view(s)
  • brian Rupnow's Avatar
    10-13-2017, 05:01 PM
    brian Rupnow replied to a thread Back to Steam-- in General
    Good eye, Rich. My original plan was to use #4 shcs on the con rod caps, and #5 everywhere else. Then at the last minute, I decided "Heck, lets make...
    190 replies | 13553 view(s)
  • brian Rupnow's Avatar
    10-13-2017, 03:11 PM
    brian Rupnow replied to a thread Back to Steam-- in General
    Today I finished the con rods. They turned out quite well. No, it isn't your eyes, that gudgeon pin hole in one of the rods is off center a bit. It...
    190 replies | 13553 view(s)
  • brian Rupnow's Avatar
    10-12-2017, 06:42 PM
    brian Rupnow replied to a thread Back to Steam-- in General
    I'm now into "second set-up" with the con-rods, machining the other side. Same fixture, but with a spacer washer of appropriate thickness between the...
    190 replies | 13553 view(s)
  • brian Rupnow's Avatar
    10-11-2017, 06:32 PM
    1-800Miner--Glad you survived it with just a scare and bruises. ---Brian
    38 replies | 2179 view(s)
  • brian Rupnow's Avatar
    10-10-2017, 08:29 PM
    brian Rupnow replied to a thread Material properties in General
    When in doubt, go thicker. The extra thickness isn't going to cost that much more, and you'll sleep better at night.
    15 replies | 524 view(s)
  • brian Rupnow's Avatar
    10-10-2017, 09:02 AM
    Lakeside--it is probably posted a thousand places, but please tell me--What is the chrome fix? I an running windows 10?--- Brian
    29 replies | 1907 view(s)
  • brian Rupnow's Avatar
    10-09-2017, 01:52 PM
    brian Rupnow replied to a thread Back to Steam-- in General
    My, but there is a world of set-up work in these con rods. By the time I'm done with two of these things, I'll be qualified to start machining...
    190 replies | 13553 view(s)
  • brian Rupnow's Avatar
    10-07-2017, 11:48 AM
    Something very important that I forgot to mention in my first post---I never drill and ream the crankshaft webs as separate pieces. I stack all of...
    29 replies | 1907 view(s)
  • brian Rupnow's Avatar
    10-07-2017, 11:09 AM
    brian Rupnow replied to a thread Back to Steam-- in General
    I couldn't stand being idle any longer, so--This morning I turned the final outside diameter on that short end of cast iron that was in my lathe,...
    190 replies | 13553 view(s)
  • brian Rupnow's Avatar
    10-06-2017, 08:13 PM
    3PhaseLightbulb--You are very quick with your answers and expertise. I have to ask--Have you ever done this?---Brian
    29 replies | 1907 view(s)
  • brian Rupnow's Avatar
    10-06-2017, 05:12 PM
    I have tried my hand at just about every kind of crankshaft construction I know of. Many successes, some that went terribly wrong, and some that I...
    29 replies | 1907 view(s)
  • brian Rupnow's Avatar
    10-05-2017, 01:14 PM
    brian Rupnow replied to a thread Back to Steam-- in General
    I seem to have worked my way through the greatest part of the pain, with the help of physiotherapy, Oxycodone, and time. I am still feeling a bit...
    190 replies | 13553 view(s)
  • brian Rupnow's Avatar
    10-05-2017, 01:14 PM
    brian Rupnow replied to a thread Back to Steam-- in General
    I would just love to be doing some more with this project right now, but the pain in my back and right leg is just so ferocious I can't. All I can...
    190 replies | 13553 view(s)
  • brian Rupnow's Avatar
    10-05-2017, 01:13 PM
    brian Rupnow replied to a thread Back to Steam-- in General
    I decided to do something easy this afternoon. My flywheel is going to be a two part assembly with an aluminum center and a cast iron outer rim. I...
    190 replies | 13553 view(s)
  • brian Rupnow's Avatar
    10-05-2017, 01:12 PM
    brian Rupnow replied to a thread Back to Steam-- in General
    I got up this morning and drilled/dowelled the crankshaft webs to the main crank and to the rod journals. I don't think that in a million years this...
    190 replies | 13553 view(s)
  • brian Rupnow's Avatar
    10-05-2017, 01:12 PM
    brian Rupnow replied to a thread Back to Steam-- in General
    Other than a bit of cleanup work, the crankshaft is finished. It fits where it is supposed to, goes round and round without smacking into anything,...
    190 replies | 13553 view(s)
  • brian Rupnow's Avatar
    10-05-2017, 01:11 PM
    brian Rupnow replied to a thread Back to Steam-- in General
    All I have left to do is the final trimming and pressing and cleanup. So far, so good.
    190 replies | 13553 view(s)
  • brian Rupnow's Avatar
    10-05-2017, 01:11 PM
    brian Rupnow replied to a thread Back to Steam-- in General
    When you press fit a crankshaft together with Loctite, the Loctite actually acts as a lubricant--but---Ya don't have time to stop and take many...
    190 replies | 13553 view(s)
  • brian Rupnow's Avatar
    10-05-2017, 01:10 PM
    brian Rupnow replied to a thread Back to Steam-- in General
    I have everything ready for pressing together. That web on the extreme left is just a brass "pattern" that was made up to be able to accurately...
    190 replies | 13553 view(s)
  • brian Rupnow's Avatar
    10-05-2017, 01:10 PM
    brian Rupnow replied to a thread Back to Steam-- in General
    So---With much butt clenching and clackety-clackety-clackety, I successfully parted off four discs on my lathe which are destined to become...
    190 replies | 13553 view(s)
  • brian Rupnow's Avatar
    10-05-2017, 01:09 PM
    brian Rupnow replied to a thread Back to Steam-- in General
    It doesn't show up really well, but this is the second step in my crankshaft build. After cutting off the 12" length of 1 1/4" cold rolled to about...
    190 replies | 13553 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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