Search found 147 matches

by theropod2
Sun Oct 02, 2011 2:55 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Using glass beads as bearings.
Replies: 1
Views: 3042

Using glass beads as bearings.

All, I was walking around with my wife at Wally World Saturday and took a side trip through the flowers and sewing department. I looked at all the nice long needles and stuff. I happened along a rack of glass beads of all sizes and shapes. Some had long bodies (+13mm) with fairly large holes (+3 mm)...
by theropod2
Thu Sep 29, 2011 12:13 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: First run of beam engine
Replies: 8
Views: 6700

Re: First run of beam engine

Good to read. I almost guarantee that when you get some good bearings and work out all the kinks you'll have a sweet littl engine there. You might get it to run off a candle! Good work! R EDIT: After watching the vid I suggest a small counterweight be added to the flywheel to offset the displacer. Y...
by theropod2
Wed Sep 28, 2011 4:06 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: First run of beam engine
Replies: 8
Views: 6700

Re: First run of beam engine

Congrats and welcome to the forum. :!: Have you an old VCR you can tear apart? The little tape read head (bright aluminum) has a couple really sweet ball bearings. I pry the plastic covers off and wash the factory lube out with rubbing alcohol and replace it with Breakfree. If you're real careful yo...
by theropod2
Sat Sep 10, 2011 3:08 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Possible LTD From Found Tube
Replies: 20
Views: 15021

Re: Possible LTD From Found Tube

I just discovered a similar tube. The packaging containers from bulk CDs and DVDs has a similar plastic tube. It has a much thinner wall, but would work well for the sidewall of an LTD engine. My tube came out of the scrap bin at a local bakery. I think it was part of a flour delivery system, but I...
by theropod2
Wed Sep 07, 2011 10:29 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Stirling Books
Replies: 5
Views: 6676

Re: Stirling Books

I mentioned this in one of the threads, but I thought I post a topic for more to see and to share their favorite Stirling titles. If one is interested in the math of Stirlings, the best book I've come across is "Principles and Applications of Stirling Engines" by C. D. West (ISBN: 0442292...
by theropod2
Wed Sep 07, 2011 7:18 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Possible LTD From Found Tube
Replies: 20
Views: 15021

Re: Possible LTD From Found Tube

To run mine I either sit it on a small bowl of boiling water, or(and more often)I sit it on top of a pot while cooking my lunch. Boiling water is as hot as I have tried, any hotter endangers the foam displacer, I suppose one of those little tea candles would be OK, but if you don't need fire,why us...
by theropod2
Tue Sep 06, 2011 5:25 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Possible LTD From Found Tube
Replies: 20
Views: 15021

Re: Possible LTD From Found Tube

Cutting the foam with a hot wire worked Ok for me. First I had to cut the foam to the right thickness, so I rigged up a wire at the required hight above a board, hooked it up to my workshop low voltage DC supply and slid the foam across the board. I then put a hole in the middle, using a vertical w...
by theropod2
Thu Sep 01, 2011 1:28 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Possible LTD From Found Tube
Replies: 20
Views: 15021

Re: Possible LTD From Found Tube

You could cut it in five 1 3/8" lenghts, if you mark it carefully, and work your way around carefully with a saw, then lay a large sheat of sand paper on a flat surface, and smooth the cut edge. with the 1" foam this would only give 1/4" stroke, it would be better if it was 3/4"...
by theropod2
Wed Aug 31, 2011 2:48 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Possible LTD From Found Tube
Replies: 20
Views: 15021

Possible LTD From Found Tube

All, I found a section of what I think is plexiglass. It is 7" long with an ID of 5 1/8" and an OD of 5 1/2". It has a few scratches but no cracks and it is cut very square now and with smooth ends. plexipipe01.jpg I was thinking of building an LTD engine around this as the displacer ...
by theropod2
Tue Aug 30, 2011 9:18 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: My don't delete me post
Replies: 27
Views: 18599

Re: My don't delete me post

I'm Ferraccio from Italy. snip... Is an engine with a beautiful aesthetic of 1800. Instead I am more critical to its efficiency, and the engineering approach to buil: each lever that moves is really nice. but it's lost work, each pin wheel is friction, which reduces the power. Briefly, the moving p...
by theropod2
Fri Aug 26, 2011 4:10 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: My don't delete me post
Replies: 27
Views: 18599

Re: My don't delete me post

Hi,

I have no idea about the sizing of parts, I just wanted to welcome you and wish you the best of luck. I love those engines and don't understand why it's such a big deal to get someone (not me) to build these engines (to full size) with modern materials.

R
by theropod2
Wed Aug 24, 2011 5:35 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: New Members PLEASE read! - OR, having problems registering, being deactivated
Replies: 511
Views: 522831

Re: "Hi" We are new here!

Just posting a howdy. There was a technical SNAFU which eliminated my previous posts and I'm having to start over.

Take care.

RS