Search found 196 matches

by Trevor
Sat Jun 15, 2019 2:19 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Robinson Hot Air Engine
Replies: 5
Views: 93

Re: Robinson Hot Air Engine

Pretty awesome. Certainly would be nice to have one of those. I made up the displacer and the regenerator and finally got it all together today. I ended up with a 20mm depth displacer and a 20mm stroke. Fired it up and away she went. Pretty good watching the linkage work. I will set up some pics aft...
by Trevor
Thu Jun 13, 2019 5:13 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Robinson Hot Air Engine
Replies: 5
Views: 93

Re: Robinson Hot Air Engine

Thanks Ian. Nice looking engines and I hope mine will look something of the same. I used a small milling machine from a neighbour to make a water channel through the top section and I might as well make a small water cooler on the bottom as well. After a lot of thought, I will go with an internal re...
by Trevor
Wed Jun 12, 2019 3:24 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Robinson Hot Air Engine
Replies: 5
Views: 93

Robinson Hot Air Engine

HI all I am in the process of making a Robinson Sterling engine with a piston diameter of 39mm and a stroke of 34mm giving me a 40.6CC volume. My displacer cylinder is 69mm internal diameter (stainless Steel). With a ratio of approx 1.6:1 the displacer cylinder has a stroke of 18mm which isn't much ...
by Trevor
Fri Mar 08, 2019 3:56 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: My First Rhombic Drive Engine
Replies: 7
Views: 778

Re: My First Rhombic Drive Engine

Hi Vjdeep Nice looking motor and well done. It appears that your piston and liner are both alloy - If this is so you will have an enormous amount of friction as alloy to alloy will gall and cause trouble to you. If you can change the liner to steel or cast iron. Ian knows a lot about this problems a...
by Trevor
Sat Feb 02, 2019 1:24 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: cold acceptor in cold head for cryocooler
Replies: 3
Views: 633

Re: cold acceptor in cold head for cryocooler

Hi Ian & Yakka Reference to your observation of a person using the cold water from gas. I built a nice Beta motor for a friend just recently and we had all sorts of problems with the gas container going so cold that the motor would stop due to very little heat caused from bottle getting to cold and ...
by Trevor
Fri Feb 01, 2019 3:10 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: What type of Stirling Engine
Replies: 7
Views: 1113

Re: What type of Stirling Engine

Hi Mac I have made an LTD engine 14"Diameter using a large rubber diaphragm. Heating was done by solar hot water from a small homemade thermo heater. The water was pumped from the reservoir through copper tubing wound inside the displacer. I do not have the photos any more as the computer failed and...
by Trevor
Thu Jan 31, 2019 12:35 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Burnt pancake displacer (carbon foam)
Replies: 8
Views: 3140

Re: Burnt pancake displacer (carbon foam)

Another good use for that Bumkin would be to wrap the dough around the heater casing to prevent heat loss, especially when vertical heating from the bottom. This then would stop outside heat from going to the cooling end.
Trevor
by Trevor
Wed Dec 05, 2018 2:13 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Thanks boydhouse
Replies: 2
Views: 860

Re: Thanks boydhouse

Here! Here! Tis and excellent Forum
by Trevor
Wed Dec 05, 2018 2:11 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Hello from a new member
Replies: 3
Views: 1621

Re: Hello from a new member

Welcome from Trev. You will find this Forum most helpful and exciting.
It was the best thing I did, by joining, and have learned a hell of a lot.
by Trevor
Fri Sep 21, 2018 11:24 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Problem Rider Ericsson model
Replies: 16
Views: 3629

Re: Problem Rider Ericsson model

OK Rick - Everything you have done seems OK, however the snifter valve maybe the culprit. I see you had it fully open - This will cause too much air to enter and/or exit from the displacer chamber. Not sure how the valve is to be set, but normally it is loose and only lets air in when below atmosphe...
by Trevor
Mon Sep 17, 2018 5:22 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Design and Manufacture of Beta Stirling
Replies: 8
Views: 2500

Re: Design and Manufacture of Beta Stirling

Hi Lucas
Personally I would like to see more cooling area - approx 25% towards the heater end.
The rest looks OK - Should be a powerful engine when finished.
Regards Trev
by Trevor
Mon Sep 17, 2018 5:18 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Problem Rider Ericsson model
Replies: 16
Views: 3629

Re: Problem Rider Ericsson model

Hi Rick Do you have good lubrication on the piston as it can slow down considerably if running too dry, also, as Ian suggested - Do you have a good load on the engine as this will stabilize the engine to a constant speed. Also you will need a constant heat source that is not based on the side etc bu...
by Trevor
Sun Sep 16, 2018 2:38 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Problem Rider Ericsson model
Replies: 16
Views: 3629

Re: Problem Rider Ericsson model

Nice looking model Rik. Ian is right with the heat required. When using a low flame, it will start to run reasonbaly well and then stop. Definitely requires more heat. I do see a gas torch lying on the left of the photo. Have you tried this on it flat out and do you have any water cooling for the di...
by Trevor
Mon Aug 27, 2018 10:55 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Dual stirling generators electrically heated
Replies: 16
Views: 2972

Re: Dual stirling generators electrically heated

Good one Melvin - Keep the fingers crossed
Trev
by Trevor
Mon Aug 27, 2018 4:22 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Dual stirling generators electrically heated
Replies: 16
Views: 2972

Re: Dual stirling generators electrically heated

From a heat source with Sterling engines recovery is at most 35% - Very good efficiency compared to other motors.
What you are saying is fine, but all that heat is wasted - check out the other threads in this forum and you will understand.
Maybe some one from this forum can answer better than me.
Trev