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Building a bigger Benson Engine

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JasonB28/12/2011 18:31:36
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I've started to write up the build of my 1 1/2 times larger version of Anthny Mount's Benson Engine over on HMEM if anyone is interested. I'll do it there as its easier than posting pics to this forum but as a taster this is where I'm at for now
 

Jason
JasonB28/12/2011 20:36:50
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Oh just realised I left off the link, I've also added the entablature now
 
AndyB28/12/2011 20:39:43
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I'm there Jason.
 
Cracking!
 
Andy
Stub Mandrel28/12/2011 20:59:11
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Nice.
 
I couldn't understand the 'paint splatter' on the base until I looked at the other thread!
 
Neil
JasonB15/01/2012 19:21:27
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I've just added the build up of the cylinder and valve chest over on HMEM, read it here
 


J
JasonB29/01/2012 19:09:02
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Just added how to turn a 6" length of 1 1/2" x 1/2" steel into a pile of swarf and this over on HMEM
 

JasonB05/02/2012 13:34:07
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Well the cold has not kept me out of the workshop this weekend, having to file the piston rod guide to profile helped stave of hypothermia.
 
I've jumped ahead a bit but having got the engine to a stage where it could be test run I could not resist plugging in the compressor, here is a short video.
 
Its running on 10psi and with all this recent talk of getting piston rings a good fit I should point out that there are No gaskets, No gland packing and No piston ring material yet so should be able to get it down to a nice smooth tick over once its all set up properly and the governor is fitted.
 
J
Stewart Hart05/02/2012 14:50:18
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Cracking Job Jason
 
Stew
JasonB04/03/2012 08:48:43
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Latest progress update here

J

AndyB04/03/2012 09:29:41
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Hi Jason,

I am still following...with admiration and my learning head on!

Andy

JasonB11/03/2012 19:12:24
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Last bit of construction can be seen on HMEM

J

JasonB19/03/2012 18:47:36
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Well its all done

And a video of it running

And as usual more photos on HMEM site
Jason
Ady119/03/2012 19:47:19
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Looks like a real pro job

I'm not jealous or anything, green is my natural colour...

Stub Mandrel19/03/2012 20:19:52
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4318 forum posts
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A beautiful engine Jason, but your 'flyby" camerawork makes me feel seasick! (I'm just jealous, like Ady)

Neil

Ian S C20/03/2012 10:22:19
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Not being a steam guy it took a second or two to work out that most of the noise was your compressor, but what it the rest of the sounds, sort of squeaky. What sort of pressure, and revs? Ian S C

JasonB20/03/2012 13:42:53
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60-70 rpm with the balls just lifting and the compressor reg wound down to 15psi.

If you look at the last post in the link to the build on HMEM I mention that "squeak" which I think is actually a whistling noise. I did not have it when I ran the engine without packing & gaskets and think it is a part blocked passage caused by the liqid gasket getting into the lower cylinder port which is making the noise on the downstroke as the air is exhausted. It does not make the noise when turned over by hand. Need to whip the cylinder off and clear the obstruction.

J

Engine Builder20/03/2012 18:13:07
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267 forum posts

Great work Jason, wonderful workmanship. It runs very sweet. I too like the slightly larger models.

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