Search found 2135 matches

by Ian S C
Wed Sep 19, 2018 4:43 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Design and Manufacture of Beta Stirling
Replies: 4
Views: 519

Re: Design and Manufacture of Beta Stirling

The cooling system on a Stirling Engine is possibly more important than the heating, that's why most of my motors are water cooled, even one of my small ones has water in a hopper. That motor has a power piston of 5/8" diameter and a stroke of 1/2". the displacer is 5/8" bore by 3/4" stroke. Ian S C
by Ian S C
Wed Sep 19, 2018 4:26 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Problem Rider Ericsson model
Replies: 9
Views: 156

Re: Problem Rider Ericsson model

The breather valve/snifter valve as far as I know is there to bring the pressure back to atmospheric as it tends to drop a bit over time. How good is the cooling system, motors with pumps often pass the pumped water through the water jacket, and if you pump from a fairly small container, and back in...
by Ian S C
Mon Sep 17, 2018 5:01 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Problem Rider Ericsson model
Replies: 9
Views: 156

Re: Problem Rider Ericsson model

Put the heat up, and take up the extra power with the water pump, these motors are designed to work with a load, also more interesting to any onlookers. I have one BETA motor with a pump, it draws the water from a container on the floor, about 3ft, it passes through the water jacket on the motor, th...
by Ian S C
Sun Sep 16, 2018 2:21 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Problem Rider Ericsson model
Replies: 9
Views: 156

Re: Problem Rider Ericsson model

Test 070 (640x480).jpg Hi Rik, did you build the Rider motor your self, and was it a kit of castings? For a 2" motor I don't think you have a big enough flame, I think you will find it needs quite a bit bigger than a cigarette lighter. My motor of similar size uses the burner from a camp stove. Ian...
by Ian S C
Fri Aug 31, 2018 4:50 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Alpha vs Beta
Replies: 3
Views: 437

Re: Alpha vs Beta

No the ALPHA motor is a different motor, the hot and cold cylinders both generate power, where as the other Stirling type motors have the one power cylinder, and use some of that power to drive the displacer. My second build is based on Dyna, a BETA motor designed by James G. Rizzo, it has a bore of...
by Ian S C
Wed Aug 29, 2018 3:08 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Alpha vs Beta
Replies: 3
Views: 437

Re: Alpha vs Beta

I can assure you that an ALPHA motor has a higher power to weight over either a BETA, or GAMMA motor. The swept volume of the cylinders of an ALPHA is equal, ie 1:1, I'v only built one unpressurised Ross Yoke ALPHA motor, 35 mm bore x 22 mm stroke, about 5 Watt at the crankshaft. Ian S C DSC01351.JPG
by Ian S C
Tue Aug 28, 2018 4:21 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Wood burner Sirling fan engine
Replies: 1
Views: 171

Re: Wood burner Sirling fan engine

My GAMMA one uses the 1.5 : 1 ratio, and the Ringbom one is about 2 : 1, but it sorts out it's own ratio depending on the load.
Ian S C
Image
by Ian S C
Tue Aug 28, 2018 4:11 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: We are back
Replies: 4
Views: 215

Re: We are back

I missed that, my computer, and landline phone went down about 2 wks ago. Ah well, fingers crossed.
Ian S C
by Ian S C
Tue Aug 28, 2018 4:07 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: ITS GENIOUS™ - 10 kW portable CHP stirling
Replies: 16
Views: 17515

Re: ITS GENIOUS™ - 10 kW portable CHP stirling

By the look of their Facebook site they seem to still be in business, but there is nothing much about sales of their machines.
Ian S C
by Ian S C
Tue Aug 28, 2018 3:47 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Dual stirling generators electrically heated
Replies: 15
Views: 475

Re: Dual stirling generators electrically heated

Electric al generation by a Stirling Engine of (say) 1Kw might at most develop .75 Kw to .8 Kw, a heating element might have a similar efficiency, producing say .5 Kw of heat, and the engine might take up 50% of that, it ain't gonner work mate. But an electric powered Stirling Engine is a good demon...
by Ian S C
Sun Aug 12, 2018 1:35 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: ITS GENIOUS™ - 10 kW portable CHP stirling
Replies: 16
Views: 17515

Re: ITS GENIOUS™ - 10 kW portable CHP stirling

We have not heard from Inestol since May 21st 2015, I wonder how many they have sold since then? Ian S C
by Ian S C
Wed Aug 08, 2018 5:30 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Gamma type cylinder and displacer
Replies: 24
Views: 1303

Re: Gamma type cylinder and displacer

When I design my motors, I like to make the power piston stroke the same or shorter than the diameter of the piston, and calculate the swept volume, then I select the tube to make the displacer, and if I can make it a little larger in diameter, and with luck it is near enough that if the same stroke...
by Ian S C
Wed Aug 08, 2018 5:10 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Small Stirling Engine
Replies: 10
Views: 462

Re: Small Stirling Engine

The little Bohm HB7-A02 often needs the power cylinder, and piston cleaned, I use a bit of paper kitchen towel, it has a stainless piston in an aluminium bore, not a mix that I would use. My own small motor has a 3/8" bore by 1/2" stroke, both the piston and cylinder are cast iron. The flywheel is 5...
by Ian S C
Mon Aug 06, 2018 4:06 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Small Stirling Engine
Replies: 10
Views: 462

Re: Small Stirling Engine

To put a photo up click on the box to the left of the Submit box, click on insert image, then attachments. You may need to reduce the photo size, I use 640 x 480, and just bring it straight from your computer. The only motor I'v bought is this one, I build my own. Ian S C [img] DSC01049%20(640x480)....
by Ian S C
Sat Aug 04, 2018 2:37 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Gamma type cylinder and displacer
Replies: 24
Views: 1303

Re: Gamma type cylinder and displacer

Yes Bumkin is correct. About the bronze, I can't help much there, some bronzes are harder than others, and I would go for the harder of the two. You should aim for as polished as possible for the bore of the power cylinder. It's usually best to have the displacer cylinder the same or larger than the...