• brian Rupnow's Avatar
    Yesterday, 07:28 PM
    One of the companies I worked for during my career made hot chamber die-casting machines. The "gooseneck" or injection cylinder was made from H13...
    24 replies | 513 view(s)
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    Yesterday, 06:08 PM
    I have been revisiting the Jan Ridders "Two Stroke Puppy" design, and though I have heard of problems with it, (This is not my experience...
    24 replies | 513 view(s)
  • brian Rupnow's Avatar
    Yesterday, 05:37 PM
    brian Rupnow replied to a thread Opposed Twin I.C. in General
    J Tiers---the simple truth is that I SUCK at making cast iron rings. I have done it 3 separate times and had two total failures and one semi failure,...
    513 replies | 40892 view(s)
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    Yesterday, 05:13 PM
    Yow Ling--You are right. In my burst of enthusiastic writing, I just plain forgot the exhaust stroke, which coincides with the compression stroke. I...
    24 replies | 513 view(s)
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    Yesterday, 05:07 PM
    brian Rupnow replied to a thread Opposed Twin I.C. in General
    Chipmaker--None of my engines run for long periods of time, so I find it difficult to answer your question. Under load, they perform very well, no...
    513 replies | 40892 view(s)
  • brian Rupnow's Avatar
    Yesterday, 03:43 PM
    No, I don't want diesel, glow, nor compression ignition engine plans. The old single cylinder Maytag engine would be just about perfect . The right...
    24 replies | 513 view(s)
  • brian Rupnow's Avatar
    Yesterday, 02:01 PM
    My working knowledge of two strokes?--Well, they have piston, rings, connecting rod and crankshaft similar to 4 cycle engines. They do not have a...
    24 replies | 513 view(s)
  • brian Rupnow's Avatar
    Yesterday, 12:35 PM
    Tifamm--Your links don't work.---Brian
    24 replies | 513 view(s)
  • brian Rupnow's Avatar
    Yesterday, 10:21 AM
    After building 10 four stroke i.c. engines, I would kind of like to try my hand at a two stroke. I have seen the Jan Ridder plans, and I know that...
    24 replies | 513 view(s)
  • brian Rupnow's Avatar
    02-04-2016, 09:35 PM
    Weight transfer theory---Remember when pre 1965, every drag car out there had its nose jacked up high in the air, for supposed "weight transfer" to...
    12 replies | 508 view(s)
  • brian Rupnow's Avatar
    02-04-2016, 03:00 PM
    Back in the day, I used to drag race my 1960 Chev Impala with high performance 283 against Camaro's running 396's, and about half the time I could...
    12 replies | 508 view(s)
  • brian Rupnow's Avatar
    02-03-2016, 06:29 PM
    brian Rupnow replied to a thread Opposed Twin I.C. in General
    I have been asked on one of the forums I post on about the temperature of the engine, and how effective the fan blades on the outside of the flywheel...
    513 replies | 40892 view(s)
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    02-02-2016, 04:10 PM
    brian Rupnow replied to a thread Opposed Twin I.C. in General
    This is it!!! The polished brass top plate with the embedded magnets fits snugly in place, doesn't rattle when the engine is running, and yes, I can...
    513 replies | 40892 view(s)
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    02-02-2016, 09:26 AM
    brian Rupnow replied to a thread Opposed Twin I.C. in General
    dp--the brass lid just sets on there, It has no gasket, nor is it air tight in any sense of the word. Any gas pressure will escape with no...
    513 replies | 40892 view(s)
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    02-01-2016, 07:58 PM
    brian Rupnow replied to a thread Opposed Twin I.C. in General
    I went up to Princess Auto this morning and bought a package of 10 "supermagnets" for $6.00 ---These things are incredibly strong in their attraction...
    513 replies | 40892 view(s)
  • brian Rupnow's Avatar
    01-31-2016, 06:47 PM
    brian Rupnow replied to a thread Splicing Videos in General
    Thank You Dp.---I had no idea that it could do all those things.---Brian
    8 replies | 321 view(s)
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    01-31-2016, 05:26 PM
    brian Rupnow replied to a thread Gasket Making in General
    RWO--I don't agree with you. On small model engines where some of the ports are almost smaller than the bolt holes, any of that "squeeze like...
    15 replies | 1295 view(s)
  • brian Rupnow's Avatar
    01-31-2016, 03:01 PM
    Okay--You heard him mention the 400 series highways at the very beginning of the video. Hell, that's just an average morning commute down the 400...
    11 replies | 806 view(s)
  • brian Rupnow's Avatar
    01-31-2016, 02:44 PM
    brian Rupnow replied to a thread Splicing Videos in General
    I also found out that when you save a movie on Windows Live Movie Maker (which saves it as a .wmv format), that there are choices when you go to...
    8 replies | 321 view(s)
  • brian Rupnow's Avatar
    01-31-2016, 12:28 PM
    brian Rupnow replied to a thread Splicing Videos in General
    CosmosK was absolutely right. it works. Thank you very much.---Brian https://youtu.be/8S8JU22PyT8
    8 replies | 321 view(s)
  • brian Rupnow's Avatar
    01-31-2016, 11:55 AM
    brian Rupnow replied to a thread Opposed Twin I.C. in General
    Got my laser tach out this morning and took a few readings. The lowest idle rpm without "faltering" seems to be about 1175 rpm. this surprises me a...
    513 replies | 40892 view(s)
  • brian Rupnow's Avatar
    01-31-2016, 11:32 AM
    brian Rupnow started a thread Splicing Videos in General
    This is a subject that I know absolutely nothing about. I have watched other peoples Youtube videos where they start a video on a subject, then reach...
    8 replies | 321 view(s)
  • brian Rupnow's Avatar
    01-31-2016, 10:11 AM
    brian Rupnow started a thread Gasket Making in General
    For everyone of us who delves into the magical world of model engines, be they steam or internal combustion, there is always a need for gaskets. ...
    15 replies | 1295 view(s)
  • brian Rupnow's Avatar
    01-30-2016, 11:08 PM
    brian Rupnow replied to a thread Opposed Twin I.C. in General
    I have just went in and reloaded the final Youtube video, using a different format to get a crisper, cleaner video with no fuzziness. It is much...
    513 replies | 40892 view(s)
  • brian Rupnow's Avatar
    01-30-2016, 08:12 PM
    brian Rupnow replied to a thread Opposed Twin I.C. in General
    Cuttings---An opposed twin cylinder engine is self balancing. It has equal amounts of moving mass on both sides of the crankshaft. Here is a nifty...
    513 replies | 40892 view(s)
  • brian Rupnow's Avatar
    01-30-2016, 04:30 PM
    brian Rupnow replied to a thread Opposed Twin I.C. in General
    Someone has asked that I post a few still shots of the finished engines, so here it is.---Brian.
    513 replies | 40892 view(s)
  • brian Rupnow's Avatar
    01-30-2016, 01:56 PM
    brian Rupnow replied to a thread Opposed Twin I.C. in General
    As I promised, here is a better lighted and better planned video. I do a bit more "voice over" on this video to explain some things about the engine....
    513 replies | 40892 view(s)
  • brian Rupnow's Avatar
    01-29-2016, 07:07 PM
    brian Rupnow replied to a thread Opposed Twin I.C. in General
    "Awesome" is a word that is often overused!--However, after a quick relapping of the valves on the left hand cylinder and a new head gasket for that...
    513 replies | 40892 view(s)
  • brian Rupnow's Avatar
    01-29-2016, 05:12 PM
    brian Rupnow replied to a thread Opposed Twin I.C. in General
    --I can't really feel a difference in the exhaust gas temperatures between the right and left hand exhaust stacks, but I can't really feel any...
    513 replies | 40892 view(s)
  • brian Rupnow's Avatar
    01-28-2016, 09:54 PM
    The last thing you want is to tamper with the heat control and have the thing run away on you in the middle of the night while you are sleeping....
    8 replies | 595 view(s)
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About brian Rupnow

Basic Information

Date of Birth
July 7, 1946 (69)
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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