Search found 209 matches

by Trevor
Sat Dec 10, 2016 8:12 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Sterling Diaphragm Engine
Replies: 97
Views: 37366

Re: Sterling Diaphragm Engine

Thanks Ian.I do use dewatering and/or kerosene fluid for aluminium as it is the only thing that works. Got me on the speed though. I was always taught fast with alloys, but this is not necessary so! I have found chattering does stop when going really slow - So your point is taken as gospel to me. Go...
by Trevor
Thu Dec 08, 2016 6:07 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Sterling Diaphragm Engine
Replies: 97
Views: 37366

Re: Sterling Diaphragm Engine

Thank you Thanh - I think I see where I may have been wrong and that is the angle of relief. Mine has been very low or flat compared to yours. Excellent info with the pics - Love them.
I will try what you pics show and let you know in a few days. Like your work Thanh

Trevor
by Trevor
Thu Dec 08, 2016 2:44 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: What are the challenges for making an engine that does real work?
Replies: 18
Views: 9333

Re: What are the challenges for making an engine that does real work?

Hi James - If you can get the book 'Sterling Engine Projects' volume 1 by James G. Rizzo - From Project 5 to 10 he explains and builds an enclosed Sterling Engine.
Regards Trevor
by Trevor
Thu Dec 08, 2016 2:37 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Sterling Diaphragm Engine
Replies: 97
Views: 37366

Re: Sterling Diaphragm Engine

Wow! Thanh. Nice engine with all that paint work. I have to ask you, how did you make the fins with a parting off blade? I have tried many times without not much success. I don't know what I am doing wrong, but the bloody things keep chattering and then snapping the blade. Checked the angle of cutti...
by Trevor
Tue Dec 06, 2016 2:19 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Sterling Diaphragm Engine
Replies: 97
Views: 37366

Re: Sterling Diaphragm Engine

Amen! to that James.
by Trevor
Mon Dec 05, 2016 3:31 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Sterling Diaphragm Engine
Replies: 97
Views: 37366

Re: Sterling Diaphragm Engine

Thanks Ian - I must get some steel shafting for the cranks as you suggest, but I do find it hard to work with and there is no way I can make a crank from a solid piece - Your the Guru here Ian and I am overwhelmed with your work. I promise to try and make a better one next though it is going to be a...
by Trevor
Sun Dec 04, 2016 4:19 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Sterling Diaphragm Engine
Replies: 97
Views: 37366

Re: Sterling Diaphragm Engine

Hi Thanh - The crank shaft is silver soldered, the pins are 3/16" hardened steel and the main shaft is 1/4" Brass which probably wasn't a good idea as it does flex easily. The brass shanks (side plates) were drilled as straight as I could using 4 jaw chuck, however these can be done on a good drill ...
by Trevor
Sun Dec 04, 2016 1:22 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Sterling Diaphragm Engine
Replies: 97
Views: 37366

Re: Sterling Diaphragm Engine

This is the finished engine now showing the radiator on the top. I finished a display at our gemshow today at Tolga with this engine running for 5 hours non stop in 33 dgree heat. The radiator kept the cooling water quite low and was pleasing to see it not getting over hot at any time. The diaphragm...
by Trevor
Sat Dec 03, 2016 3:29 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Heater & Regenerator Design
Replies: 60
Views: 26242

Re: Heater & Regenerator Design

I have no idea of the tubular heat exchanges either, apparently they do seem to work very well. What Ian is saying about the Gamma design is good. It is only a small way from the Displacer rod and makes it easy to fit, however, I have found if you are worried about dead space, it may be worth using ...
by Trevor
Sat Dec 03, 2016 3:21 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Sterling Diaphragm Engine
Replies: 97
Views: 37366

Re: Sterling Diaphragm Engine

That's some high revs there Ian. I like your idea of using steel water pipe for the power piston. I certainly will be using bronze as my next cylinder for another venture so will use water pipe as the piston one that one. I hope I can get to that mark of a 1000 revs with thermal water cooling and a ...
by Trevor
Wed Nov 30, 2016 3:00 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Sterling Diaphragm Engine
Replies: 97
Views: 37366

Re: Sterling Diaphragm Engine

Wow! Nice one Ian. That is a superb engine. I see your point about the radiator and shaft length, but I am stuffed now the way I have set it up on the crankshaft. I will use this engine for trials of different ways as the base and top plates have holes drilled all over it. I have just come back from...
by Trevor
Tue Nov 29, 2016 12:09 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Sterling Diaphragm Engine
Replies: 97
Views: 37366

Re: Sterling Diaphragm Engine

Hi youarenotwelcome friend. Due to this model being a diaphragm type I don't think you can make one to do 10kW. You would need one huge engine that would need to pressurized with helium or hydrogen to get a better dense atmosphere. The model I have shown will do to around 4 to 6inch max. Hope this h...
by Trevor
Tue Nov 29, 2016 12:05 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Sterling Diaphragm Engine
Replies: 97
Views: 37366

Re: Sterling Diaphragm Engine

Hi Thanh - I see your point, but I didn't think that was a good idea in a bigger model (loved your little engine) though. I don't know how you did the graphics to the photo, but you made it look pretty good. I will send another photo next couple of days as I have now moved the radiator away from the...
by Trevor
Mon Nov 28, 2016 2:06 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: What are the challenges for making an engine that does real work?
Replies: 18
Views: 9333

Re: What are the challenges for making an engine that does real work?

HI Thanh - Did you see that big piece of heat shield he was using in that video - Man! wouldn't I like a piece of that right now.
Trevor
by Trevor
Mon Nov 28, 2016 1:59 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Sterling Diaphragm Engine
Replies: 97
Views: 37366

Re: Sterling Diaphragm Engine

Hi Ian, I am not sure that would work due to the height of the cooling tubes, but it is worth a try. Today I took it all apart and got rid of the heater box completely and just kept a shroud around it. I do not know whether you have had any experience in what is known as back heat or wasted heat tha...