Author Topic: New Member from Northern VA  (Read 2331 times)

Offline 73emgee

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New Member from Northern VA
« on: June 30, 2016, 05:52:33 PM »
Greetings from Bob,

I have a Sherline lathe and CNC mill, just completed my first wobbler, it's tiny only 1 1/4" tall with a 3/4" flywheel, almost pissed myself when it ran.  Mostly interested in learning techniques for using Sherline equipment to make small engines.  Very interested in design concepts, such as matching proper flywheel size to bore and stroke, most efficient placement and size of ports on a wobbler, how much clearance to leave between top of piston and head, etc.  Would very much like to design my own engines using CAD, but need to learn more about proper design elements for an efficient running engine.

Offline zeeprogrammer

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Re: New Member from Northern VA
« Reply #1 on: June 30, 2016, 06:06:15 PM »
Welcome to the forum Bob.

I'd like to see pic of your engine. That's pretty small!
Carl (aka Zee) Will sometimes respond to 'hey' but never 'hey you'.
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Offline b.lindsey

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Re: New Member from Northern VA
« Reply #2 on: June 30, 2016, 06:09:30 PM »
Welcome Bob....from another Sherline user. There are several active threads going on now showing Sherline equipment. Maybe you can glean some information from those as well.
Bill

Offline scc

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Re: New Member from Northern VA
« Reply #3 on: June 30, 2016, 08:24:43 PM »
A very warm welcome Bob,          Regards............Terry

Offline Don1966

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Re: New Member from Northern VA
« Reply #4 on: June 30, 2016, 10:55:45 PM »
Hi Bob and welcome to the group!

 :hi:
Don

Offline Dave Otto

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Re: New Member from Northern VA
« Reply #5 on: July 01, 2016, 01:50:35 AM »
Hi Bob,

Welcome to MEM!

Dave

Offline Flyboy Jim

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Re: New Member from Northern VA
« Reply #6 on: July 01, 2016, 05:04:23 AM »
Welcome Bob,

I too, would love to see some pictures of your engine.

You might want to check out Elmer's engines, if you haven't already:  http://www.john-tom.com/html/ElmersEngines.html  Lots of good info there. I'm betting that by studying his designs that some common denominators, of engine design, would start to stand out.

Jim

Sherline 4400 Lathe
Sherline 5400 Mill
"You can do small things on big machines, but you can do small things on small machines".

Offline bruedney

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Re: New Member from Northern VA
« Reply #7 on: July 01, 2016, 05:34:25 AM »
Welcome Bob

You will soon find that posts on this forum without pictures get you harassed by some, aye Carl  :stickpoke:

Bruce
‘Results! Why man, I have gotten a lot of results. I know several thousand things that won’t work.’ — Thomas Alva Edison

Offline 90LX_Notch

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Re: New Member from Northern VA
« Reply #8 on: July 01, 2016, 04:21:36 PM »
Welcome Bob.

The easiest way to do tiny engines is build one then scale it down.  I did Elmer's Tiny at full scale which is around the size of your engine.  Then I did one at 1/2 scale and finally did one at 1/4 scale.  The 1/4 scale is smaller then an M&M candy. 

To go small, the techniques are the same.  The challenge is in the workholding (and if you can keep your sanity).

-Bob
Proud Member of MEM

My Engine Videos on YouTube-
http://www.youtube.com/user/Notch90usa/videos

Offline 73emgee

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Re: New Member from Northern VA
« Reply #9 on: July 01, 2016, 04:53:34 PM »
OK, here's a picture of my first engine.

Bob

Offline 90LX_Notch

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Re: New Member from Northern VA
« Reply #10 on: July 01, 2016, 05:13:20 PM »
Looks good Bob.  Especially for a first engine.  Congratulations.

-Bob
Proud Member of MEM

My Engine Videos on YouTube-
http://www.youtube.com/user/Notch90usa/videos

Offline zeeprogrammer

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Re: New Member from Northern VA
« Reply #11 on: July 01, 2016, 06:03:15 PM »
First engine with some nice detail on the cylinder. Well done.  :ThumbsUp:
Carl (aka Zee) Will sometimes respond to 'hey' but never 'hey you'.
"To work. To work."
Zee-Another Thread Trasher.

Offline 73emgee

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Re: New Member from Northern VA
« Reply #12 on: July 01, 2016, 08:29:50 PM »
Welcome Bob,

I too, would love to see some pictures of your engine.

You might want to check out Elmer's engines, if you haven't already:  http://www.john-tom.com/html/ElmersEngines.html  Lots of good info there. I'm betting that by studying his designs that some common denominators, of engine design, would start to stand out.

Jim

Really enjoyed your build of Elmer 25, and I'm following Elmer 43.  I like seeing Sherline equipment in use, excellent work.

Offline b.lindsey

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Re: New Member from Northern VA
« Reply #13 on: July 02, 2016, 01:07:49 AM »
Well done Bob...thanks for the picture!!

Bill

Offline Flyboy Jim

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Re: New Member from Northern VA
« Reply #14 on: July 02, 2016, 03:47:18 AM »
Welcome Bob,

I too, would love to see some pictures of your engine.

You might want to check out Elmer's engines, if you haven't already:  http://www.john-tom.com/html/ElmersEngines.html  Lots of good info there. I'm betting that by studying his designs that some common denominators, of engine design, would start to stand out.

Jim



Really enjoyed your build of Elmer 25, and I'm following Elmer 43.  I like seeing Sherline equipment in use, excellent work.

Thanks for the compliment Bob and for the picture of your engine. Like Carl said..........some nice detail on the cylinder.  :ThumbsUp:

Jim
Sherline 4400 Lathe
Sherline 5400 Mill
"You can do small things on big machines, but you can do small things on small machines".