Search found 114 matches

by derwood
Fri Dec 05, 2014 8:03 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Thermal lag plans
Replies: 7
Views: 7749

Thermal lag plans

Here is a picture tutorial for building the big thermal lag engine. If you have any questions just ask. The file was too big to upload directly to the site.

https://www.mediafire.com/?hdbcbnj9d2f8sdc
by derwood
Wed Oct 29, 2014 11:08 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: thermal Lag with rocket stove
Replies: 0
Views: 29647

thermal Lag with rocket stove

The rocket stove seems to do better than the propane. I'm getting ready to make an attempt to pressurize. I'm going to have to make an airtight crank case. http://youtu.be/tXbXcl8yb0c
by derwood
Thu Jul 10, 2014 2:05 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Thermal lag generating electricity
Replies: 6
Views: 6159

Re: Thermal lag generating electricity

I tried a smaller motor and it did not work well. The motor I am using seems to be a good match after all. I also am unsure about pressurizing this type of engine. One concern I have is an increase in pressure when the piston moves outward. This occurrence does not happen under normal atmosphere. Pe...
by derwood
Wed Jul 09, 2014 1:08 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Thermal lag generating electricity
Replies: 6
Views: 6159

Re: Thermal lag generating electricity

Thanks! Yes it's a vw beetle cylinder. 87mm. The generator is a 5.5 amp 12vdc motor. It's too big for this engine. the dc motor has quite a bit of resistance with out a load. I need to get my hands on 2 amp 12 volt motor. I am also trying to figure out an easy way to pressurize the engine.
by derwood
Tue Jul 08, 2014 7:11 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Thermal lag generating electricity
Replies: 6
Views: 6159

Thermal lag generating electricity

Thought I would post this for anyone who is interested.

https://www.youtube.com/watch?v=ZjNDsxsGRqM
by derwood
Thu May 08, 2014 10:45 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Thermoacoustic engine restrictors
Replies: 3
Views: 3872

Re: Thermoacoustic engine restrictors

Hey Dick, I have hundreds of hours testing this type of engine. Many times I have had to walk away from testing for months at a time. Too many variables begin to consume my thoughts to the point where I dream about it. Be careful! With that said I can confidently say that acoustics have nothing to d...
by derwood
Wed Mar 26, 2014 8:24 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: Alpha type 3D printed Stirling
Replies: 5
Views: 5409

Re: Alpha type 3D printed Stirling

I got my printer about 3 weeks ago. I will print this very soon. Thanks!
by derwood
Mon Mar 10, 2014 3:22 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: High powered Stirling going into production
Replies: 72
Views: 80188

Re: High powered Stirling going into production

Starting to look like the real deal!
by derwood
Mon Feb 24, 2014 5:54 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: High powered Stirling going into production
Replies: 72
Views: 80188

Re: High powered Stirling going into production

5kw seems like a lot of power for the size.
by derwood
Fri Jan 24, 2014 4:39 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: My stirling engine project
Replies: 21
Views: 11539

Re: My stirling engine project

It will create more dead space. That will decrease power.
by derwood
Thu Dec 05, 2013 8:35 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: HHO, woodgas, OTTO alternative
Replies: 6
Views: 5657

Re: HHO, woodgas, OTTO alternative

Hey, I have been wanting to comment on this for a while. I have built several wood gas generators over the last eight years. The only way I have found to eliminate the tars is to use charcoal or wood with a good filtering system. When using biomass/wood, The end result is charcoal (glowing carbon). ...
by derwood
Thu Oct 24, 2013 4:04 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: large lamina flow build
Replies: 139
Views: 157443

Re: large lamina flow build

This engine will mount to my rocket stove very soon. I am thinking of making a shroud and using the fresh air intake of the stove to pull air through the shroud.
by derwood
Wed Oct 23, 2013 6:41 pm
Forum: Stirling and "Hot Air" Engine Forum
Topic: large lamina flow build
Replies: 139
Views: 157443

Re: large lamina flow build

Thanks for the support everyone.
by derwood
Tue Oct 22, 2013 5:17 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: large lamina flow build
Replies: 139
Views: 157443

Re: large lamina flow build

Yes, The heat exchanger has much room for improvement. I have used a small pump to drip water over the cylinder and It will sustain 950 rpms. Eventually I will make a cylinder with a water jacket. using the vw cylinder makes this engine very easy to build and it does run a very long time without wat...