Author Topic: Rupnow Overhead Cam-Air Cooled  (Read 35371 times)

Offline Brian Rupnow

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Re: Rupnow Overhead Cam-Air Cooled
« Reply #165 on: March 11, 2017, 01:17:38 AM »
Thank you, gentlemen. This build got me thru the coldest, darkest part of the winter, and overall it went very well, with no do-overs except for the ill fated gas tank. I am always greatly gratified when an engine fires right up and runs first try. When I look back at my first i.c. engine attempts like the Webster and the Kerzel, and all the horrible issues I had with non sealing valves, it makes me give my head a shake. I don't do very much different now than I did five years ago when I first started building i.c. engines, but we must learn by our mistakes, because I seem to have a lot fewer problems now. It's been a fun ride, and I thank all of you who followed along during the build.---Brian

Offline Art K

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Re: Rupnow Overhead Cam-Air Cooled
« Reply #166 on: March 11, 2017, 01:18:24 AM »
Brian,
Sounds great  :pinkelephant: here's the happy dance for you.
"The beautiful thing about learning is that no one can take it away from you" B.B. King

Offline Flyboy Jim

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Re: Rupnow Overhead Cam-Air Cooled
« Reply #167 on: March 11, 2017, 03:31:35 AM »
That's a nice looking and running engine Brian. It's been nice seeing it evolve.

Jim
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"You can do small things on big machines, but you can do small things on small machines".

Offline Roger B

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Re: Rupnow Overhead Cam-Air Cooled
« Reply #168 on: March 11, 2017, 08:36:16 AM »
Excellent  :praise2:  :praise2: A very steady runner  :ThumbsUp:  :ThumbsUp:
Best regards

Roger

Offline Brian Rupnow

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Re: Rupnow Overhead Cam-Air Cooled
« Reply #169 on: March 11, 2017, 02:27:51 PM »
And just to show that I'm not a total barbarian, I dug around in my box of tension springs and found one that will act as a throttle return spring so I can get rid of the rubber band!! It is going to attach to that head bolt nearest to the other end of the spring, but first I have to buy a longer #6 shcs to replace the one that is in there already.

Offline Alan Haisley

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Re: Rupnow Overhead Cam-Air Cooled
« Reply #170 on: March 11, 2017, 04:13:45 PM »

 :ThumbsUp: :ThumbsUp:
Good one, Brian!


Offline Brian Rupnow

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Re: Rupnow Overhead Cam-Air Cooled
« Reply #171 on: March 13, 2017, 12:40:44 AM »
With the completion of this engine I have now built just about every version of the internal combustion engine. I have built  flathead engines, overhead valve engines, overhead cam engines, two cycle engines with no valves, hit and miss engines, and both atmospheric valves and cam operated valves. I know there are more "strange one of" versions of the i.c. engine out there, but I have just about covered all of the popular styles. I have not, and probably will not build a radial i.c. engine, although I have built a 5 cylinder radial "steam engine".

Offline zeeprogrammer

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Re: Rupnow Overhead Cam-Air Cooled
« Reply #172 on: March 13, 2017, 12:55:06 AM »
Just saw the video.
Nicely done!  :ThumbsUp:
Great sound and control.
Carl (aka Zee) Will sometimes respond to 'hey' but never 'hey you'.
"To work. To work."
Zee-Another Thread Trasher.

Offline Art K

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Re: Rupnow Overhead Cam-Air Cooled
« Reply #173 on: March 13, 2017, 01:36:52 AM »
Brian,
I just thought I'd throw this out to muck up the water a bit, but you missed one type of valve mechanism, Sleeve valve. There's even two types to choose from, single and double. Or by example Bristol Hercules or Knight. :mischief:
Art
"The beautiful thing about learning is that no one can take it away from you" B.B. King

Offline Jo

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Re: Rupnow Overhead Cam-Air Cooled
« Reply #174 on: March 13, 2017, 07:55:35 AM »
I just thought I'd throw this out to muck up the water a bit, but you missed one type of valve mechanism, Sleeve valve. There's even two types to choose from, single and double. Or by example Bristol Hercules or Knight. :mischief:

There are some simple single cylinder sleeve valve aircraft engines like the Green 'G 30'  ;)

Jo
Enjoyment is more important than achievement.

Offline Brian Rupnow

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Re: Rupnow Overhead Cam-Air Cooled
« Reply #175 on: March 13, 2017, 02:05:18 PM »
I will think on the sleeve valve engine. I have never seen one, but I have heard about them.---Brian

Offline Jo

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Re: Rupnow Overhead Cam-Air Cooled
« Reply #176 on: March 13, 2017, 02:31:12 PM »
Here is another model sleeve engine: http://www.metallmodellbau.de/Sleeve_Valve_Engine.php

Jo
Enjoyment is more important than achievement.

Offline Brian Rupnow

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Re: Rupnow Overhead Cam-Air Cooled
« Reply #177 on: March 13, 2017, 02:36:39 PM »
Jo--that is pretty impressive. It might be beyond what I am capable of.---Brian

Online Bluechip

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Re: Rupnow Overhead Cam-Air Cooled
« Reply #178 on: March 13, 2017, 03:20:26 PM »
I thought I'd seen one somewhere  :thinking:  Barr & Stroud 350cc bike engine.

http://modelenginenews.org/ed.2009.08.html

IIRC they were an OEM engine used by a few bike makers ... Rex-Acme ???

More piccys:

http://www.bing.com/images/search?q=barr+and+stroud+sleeve+valve+engine&qs=n&form=QBILPG&pq=barr+and+stroud+sleeve+valve+engine&sc=0-20&sp=-1&sk=&ghc=1

And this:

http://madmodder.net/index.php/topic,2456.0.html

Dave
« Last Edit: March 13, 2017, 03:23:58 PM by Bluechip »

Offline Art K

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Re: Rupnow Overhead Cam-Air Cooled
« Reply #179 on: March 13, 2017, 04:21:18 PM »
Dave,
That would be Strictly Internal Combustion issues 83-84
http://www.strictlyic.com/ser01.htm
Art
"The beautiful thing about learning is that no one can take it away from you" B.B. King

 

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