Search found 209 matches

by Trevor
Wed Dec 21, 2016 3:15 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Snifting valve
Replies: 30
Views: 11500

Re: Snifting valve

Thanks Ian - I had no idea, though wouldn't it suck air back through on the vacuum return, or do they make the hole real small?
Trevor
by Trevor
Wed Dec 21, 2016 2:12 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: hot Air Beam Engine with cooling and generator
Replies: 28
Views: 8322

Re: hot Air Beam Engine with cooling and generator

HI Thanh - Er! Don't know how to set up video on this forum or putting on Utube as yet. A few other friends of mine have asked the same question, however I will try over the Christmas break - Just for you
Trevor
by Trevor
Wed Dec 21, 2016 2:09 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Snifting valve
Replies: 30
Views: 11500

Re: Snifting valve

HI aviator - Do they need a balance valve?
Trevor
by Trevor
Wed Dec 21, 2016 2:07 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Help!!
Replies: 9
Views: 6314

Re: Help!!

Hi tibsim - I have tried to make an acoustic generator and your Utube sites are very impressive. Just finished looking at one of your threads and now I see why my generator may have failed. I have used rubber tyre rubber but with little success. You may have resolved my problem and brought back my e...
by Trevor
Wed Dec 21, 2016 1:43 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: hot Air Beam Engine with cooling and generator
Replies: 28
Views: 8322

Re: hot Air Beam Engine with cooling and generator

Nice one Ian. Lovely little engine and love your lathe work. I am afraid am not very good with a lathe, but learning fast. Your thread and Thanh's thread helped me with the parting off work. I can now say I have accomplished it - You were right about the slow speed...Majic. I have just run up my eng...
by Trevor
Tue Dec 20, 2016 2:30 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: What is the difference between thermal lag and lamina flow engines
Replies: 36
Views: 15591

Re: What is the difference between thermal lag and lamina flow engines

This is a picture of the Acoustic engine that works but not good. I will get around to making it work properly one day, but with all the failures it is hard to get that enthusiasm I once had - Must be old age :big smile: .......Trevor
by Trevor
Mon Dec 19, 2016 11:55 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: What is the difference between thermal lag and lamina flow engines
Replies: 36
Views: 15591

Re: What is the difference between thermal lag and lamina flow engines

HI Crazyguy I have built a few of these myself (thermal acoustic engines) and as yet have not got one to operate well. The ones with 3 diaphragms seem to work better than a single one, however using a piece of hose that tunes the engine will also work and it is this design that I seem to work better...
by Trevor
Mon Dec 19, 2016 2:10 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: hot Air Beam Engine with cooling and generator
Replies: 28
Views: 8322

Re: hot Air Beam Engine with cooling and generator

Another pic of what I am doing. You notice the idea of using a Watt linkage failed on me, so I have reverted to just using a long displacer rod. I managed to get the pulley fitted into the lathe by grinding away all the grove section and then only just fitted. At least it is now finished. The bearin...
by Trevor
Sun Dec 18, 2016 4:12 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: hot Air Beam Engine with cooling and generator
Replies: 28
Views: 8322

Re: hot Air Beam Engine with cooling and generator

Yep! The investment powder is for casting metal objects and will take around 1000 deg C. This will be the first time I have used it for this purpose. I don't know if it will work yet - It as we would say, Trial and Error Ian. I buy the meths for around $6.00 for 5 litres here and you are correct - E...
by Trevor
Sat Dec 17, 2016 4:42 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: hot Air Beam Engine with cooling and generator
Replies: 28
Views: 8322

Re: hot Air Beam Engine with cooling and generator

I have used investment powder to make the fire wall - All I need to do now is place the chimney to direct the heat away from the water Jacket.
Trev
by Trevor
Sat Dec 17, 2016 4:38 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: hot Air Beam Engine with cooling and generator
Replies: 28
Views: 8322

Re: hot Air Beam Engine with cooling and generator

I was going to go with gas Ian, but have changed my mind and now going with Meths burner.
Here is the latest pic of the fire box. I used investment powder to make the fire wall to retain the heat so it will not radiate outwards or downwards.
Trev
by Trevor
Thu Dec 15, 2016 2:44 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Re: mod II stirling engine report
Replies: 16
Views: 6434

Re: mod II stirling engine report

Wonderful discussion - I learnt a bit in that discussion and is well appreciated by me :big smile: Trevor
by Trevor
Thu Dec 15, 2016 3:16 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: hot Air Beam Engine with cooling and generator
Replies: 28
Views: 8322

hot Air Beam Engine with cooling and generator

This is my first attempt at making a Beam Engine. This engine will be using the Watt linkage for the displacer. The engine is based on a displacer of 74mm and a stroke of 38mm. The piston is 38mm and will have a stroke of 64mm being a ratio of approx. 2.5 to 1. The water pump is driven by an air ope...
by Trevor
Thu Dec 15, 2016 3:06 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Re: mod II stirling engine report
Replies: 16
Views: 6434

Re: Re: mod II stirling engine report

Hello Aviator 168,
Can one use a good efficient radiator here with a fan blow if you have enough power source to spare. On the small models they work very well.
Trevor
by Trevor
Mon Dec 12, 2016 8:03 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Sterling Diaphragm Engine
Replies: 97
Views: 37366

Re: Sterling Diaphragm Engine

Thanks Ian - Never looked at it that way. We will see how I go next week when I am back from our holiday in the rain.
Trev