Search found 193 matches

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: 372

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: 406

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: 693

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: 2723

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: 642

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: 1299

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: 2909

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: 2067

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: 2909

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: 2909

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: 2317

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: 2317

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
by Trevor
Sat Aug 25, 2018 11:01 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Dual stirling generators electrically heated
Replies: 16
Views: 2317

Re: Dual stirling generators electrically heated

Impressive Engines - I am not sure of the electrical robust radiator running both engines to produce 20kW. It would mean you are getting more energy out than what is going in. If you accomplish this you will go into the history books. Give it a go and I wish you the best - There will be a lot of sur...
by Trevor
Thu Aug 23, 2018 2:40 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Dual stirling generators electrically heated
Replies: 16
Views: 2317

Re: Dual stirling generators electrically heated

Hi Melvin
Not sure what you want to do will work. If both engines are the same size and one is a heater for both, you will be trying to do the "Holy Grail", that is a perpetual motion machine. Physics show this cannot be done if you want the same power output to boyh.
Trev
by Trevor
Sun Jun 10, 2018 1:12 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: the volume ratio between displacer cylinder and power cylinder
Replies: 4
Views: 1439

Re: the volume ratio between displacer cylinder and power cylinder

Hello OscarmikeIan
Ian is correct with the ratios 1.5:1 for Stirling Engines. It is the optimal ratio that has been tested for a very long time.
When using LTD Engines then this will be different.
You cannot have a larger piston capacity that the displacer as the engine will not work at all
Trev