Search found 19 matches

by mastrovetraio
Thu Jun 16, 2016 1:04 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Two pieces LTD displacer
Replies: 4
Views: 3982

Re: Two pieces LTD displacer

I image a single acting power cylinder, and the displacer/s activated by a servo mechanism. Maybe electromagnetic, or better a pendulum (Burnit0017 is a master of ) why I see the displacer not as a piston, but as a "switch" between hot/cold side. On the hot side I see molten lead, and I guess that w...
by mastrovetraio
Wed Jun 15, 2016 4:20 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Two pieces LTD displacer
Replies: 4
Views: 3982

Two pieces LTD displacer

I'm reinventing the wheel. In my poor design you see ONE displacer divided in two halves. The purpose is that you can use heavy materials, and go up with temperature . The divided displacer will not eat energy to the power cylinder. Maybe ??
by mastrovetraio
Fri Jun 10, 2016 11:42 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: The use of concrete for models
Replies: 8
Views: 6178

Re: The use of concrete for models

Hi Tom. Ceramic fiber come also in rigid panels. Airtight, but can not afford pressure. Ceramic fiber panels come in a variety of density in front of a variety of temperature to withstand. I've maded kiln to work up to 900° C with C.F. 5 cm thick and you can put hour hand over, was barely warm with ...
by mastrovetraio
Thu Jun 09, 2016 1:06 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: The use of concrete for models
Replies: 8
Views: 6178

Re: The use of concrete for models

You can make the displacer directly with panels of ceramic fiber. It's stiff and light weight, and easy to work.
by mastrovetraio
Sun Mar 13, 2016 12:24 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: My last made Stirling engine : an alpha Ross 38 cm3
Replies: 10
Views: 4731

Re: My last made Stirling engine : an alpha Ross 38 cm3

Merci. Surtout pour la video du "faire du froid", assez claire. Chapeau !
by mastrovetraio
Wed Feb 24, 2016 10:36 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: What is the difference between thermal lag and lamina flow engines
Replies: 36
Views: 16078

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

https://youtu.be/hrPW2ZAvpQo is a tube of Blade Attila. The difference between his experiment and your is that water is much more dense that air is. That's the reason why I think that's necessary an impedance coupler and (maybe) a longer tube, a "trombone" ..... If this stuff is "thermo-acoustic", w...
by mastrovetraio
Mon Feb 22, 2016 11:31 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: New engines and ideas
Replies: 30
Views: 18920

Re: New engines and ideas

I have understood why the cylindrical work poorly. You speak of "thermo acoustic", but you don't respect the ACOUSTIC. A cylinder will resonate by itself, with counteracting energy. You have to use a double trumpet shape, front to front, with the diaphragm in the middle. No counteracting energy, but...
by mastrovetraio
Sun Feb 21, 2016 9:50 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: New engines and ideas
Replies: 30
Views: 18920

Re: New engines and ideas

Hallo, Tibsim. I think that it's time to found a "group of work", I've seen that you have maked a lot of changes in your metronome, but I think that is necessary to investigate every single component prior to change it...So if you make a "point zero" design (design,not youtube) I can make exactly th...
by mastrovetraio
Sun Aug 09, 2015 7:42 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Making manson engine
Replies: 6
Views: 5779

Re: Making manson engine

About the ratio between the displacer and the power piston, it depends from the ΔT but the bigger the better IF the displacer is really lightweight. For this reason the place where you put the regenerator is wrong. Better around the shaft/pipe. I believe that the most critical hole is that on the tu...
by mastrovetraio
Sun Aug 09, 2015 4:33 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Making manson engine
Replies: 6
Views: 5779

Re: Making manson engine

The displacer must also act as a thermal switch, the goal is to change the volume of a given mass of air in the minimum time, heathing/cooling it. I belive that having the two heath exchanger alternatively "switched on/off" by the displacer will benefit the overall efficiency.
by mastrovetraio
Sun Aug 09, 2015 12:34 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Making manson engine
Replies: 6
Views: 5779

Re: Making manson engine

The idea is clean, logical. But I feel (it's only a feeling, I'm not engineer, neither I never build anything) a lack of heat exchangers. I'm wondering about using the system that is in the photo. It's easy to make with brazed copper, and it's easy to carve fins into the styrofoam.
by mastrovetraio
Tue Aug 04, 2015 4:01 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Gamma not working
Replies: 66
Views: 27634

Re: Gamma not working

Thank you, burnit0017. I will reciprocate with this http://www.cotronics.com/catalog/ Thake a look to the product 931 I hope will be useful
by mastrovetraio
Mon Aug 03, 2015 11:18 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Gamma not working
Replies: 66
Views: 27634

Re: Gamma not working

Hi, burnit0017. High temperature epoxy ? what temperature can it whitstand ? Can You say me the brand ?