Search found 2148 matches

by Ian S C
Fri Jun 01, 2018 1:58 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Whispergen mk4
Replies: 14
Views: 1327

Re: Whispergen mk4

I'm not sure where the 10 W 40 goes, it's what I got off a web site. If its a grease either moly, or a Teflon based one, but don't mix them, specially molly and graphite.
Ian S C
by Ian S C
Thu May 31, 2018 6:27 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Whispergen mk4
Replies: 14
Views: 1327

Re: Whispergen mk4

From what I find on the web, the Whispergen uses 10 W 40, or 10 W 40 Long Drain, I suppose that is a synthetic oil. The coolant is automotive corrosion inhibited glycol antifreeze. The address that I can find is;
Bill Higher
Whisper Tech Ltd.,
224 Armagh Street
Christchurch
New Zealand

Ian S C
by Ian S C
Thu May 31, 2018 1:32 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Whispergen mk4
Replies: 14
Views: 1327

Re: Whispergen mk4

I wonder if wood pellets as used in pellet fires could be used for heating.
Ian S C
by Ian S C
Fri May 25, 2018 3:19 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Whispergen mk4
Replies: 14
Views: 1327

Re: Whispergen mk4

With a different burner it is possible to run on liquid fuel such as kerosene, petrol, diesel. Its possible that someone will come up with a method of using solid fuel with thee motors. I don't know if Peter Lyne looks in on this forum, if he does he knows all about these motors. I don't know where ...
by Ian S C
Sun May 20, 2018 3:58 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Yorky's Twin Cylinder Beam Engine
Replies: 14
Views: 1240

Re: Yorky's Twin Cylinder Beam Engine

There is a wide range of fits of the bearings, so you should be able to find a few good ones. One of the two stove top fan motors that I built has used skate board bearings that are so worn I afraid the balls might fall out. That motor is unusual as Stirling Engines go, it's too powerful, the gyro e...
by Ian S C
Sat May 19, 2018 3:59 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Yorky's Twin Cylinder Beam Engine
Replies: 14
Views: 1240

Re: Yorky's Twin Cylinder Beam Engine

That's a neat way of setting up your crankshaft. If you read a bit about building Stirling Engines, you will come across a bit about removing the shields on bearings, and washing out the grease, these bearing don't have grease. If need be some very light oil, just a very small drop can be used, but ...
by Ian S C
Fri May 18, 2018 3:03 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Whispergen mk4
Replies: 14
Views: 1327

Re: Whispergen mk4

Don't worry they built a few thousand, but I live near Christchurch NZ, where they were developed, and until the workshop and design laboratory was destroyed in an earthquake in 2011. The EQ about put an end to Whisper Tech and the Whispergen. Now I can't call in when I'm in town, have a cup of tea,...
by Ian S C
Fri May 18, 2018 2:50 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Yorky's Twin Cylinder Beam Engine
Replies: 14
Views: 1240

Re: Yorky's Twin Cylinder Beam Engine

You can usually find 6 mm bearings in old VHS recorders, I suppose that they are, or have been chucked out over there. A source of 8 mm bearings (not the best bearings) is Fidgits, I got two for $NZ 1 each, less than 50 UK pence. That fly wheel looks good, it should be quite adequate. I had a motor ...
by Ian S C
Thu May 17, 2018 2:21 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Whispergen mk4
Replies: 14
Views: 1327

Re: Whispergen mk4

Hi Saska, I can understand the lime scale on the cooling side, I imagine that can be dissolved. Don't know how the pistons could get rusty unless it has layed up with the motor open to the atmosphere.
Hope you can get at least one running, they are quite a good little motor.
Ian S C
by Ian S C
Wed May 16, 2018 2:12 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Engine running for short period
Replies: 5
Views: 690

Re: Engine running for short period

The cooling system has been one of the main problems in using Stirling Engines in motor vehicles. As for the piston, you might be able to modify it to reduce friction. If you can remove the piston and support it in the lathe so that you can put a number of grooves, about .010" in width and depth on ...
by Ian S C
Mon May 14, 2018 4:26 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Engine running for short period
Replies: 5
Views: 690

Re: Engine running for short period

One of your problems may be that your power cylinder and piston are like metals, generally this is not good practice, you should make the power piston from cast iron. As metals go the only one that can be run together is cast iron, second best is cast iron and steel. What do you do with the water in...
by Ian S C
Sat May 12, 2018 2:18 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Yorky's Twin Cylinder Beam Engine
Replies: 14
Views: 1240

Re: Yorky's Twin Cylinder Beam Engine

A ha, Yorky, you missed the free piston bit, these motors have no crankshaft, the work from the power piston works against a spring, this can be a mechanical spring, or a gas spring, or as in this case using two magnets with like poles facing each other, at the base of the motor you can see the coil...
by Ian S C
Fri May 11, 2018 4:02 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Yorky's Twin Cylinder Beam Engine
Replies: 14
Views: 1240

Re: Yorky's Twin Cylinder Beam Engine

The ideal metal for the hot cap is stainless steel, heat conduction is no problem, it's only got to go the few thou, the thickness of the cap, the thing you don't need is the conduction of heat length wise toward the cold end. With a steel/stainless steel hot cap I use no insulation between the hot ...
by Ian S C
Thu May 10, 2018 2:35 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Yorky's Twin Cylinder Beam Engine
Replies: 14
Views: 1240

Re: Yorky's Twin Cylinder Beam Engine

Yorky, interesting form of construction, I'll follow along as you build your motor. Copper is not really the ideal material, it conducts hear too fast from the hot end to the cold end. Also when heated it looses it's strength, also with heating it corrodes and flakes of copper oxide come off it, bot...
by Ian S C
Thu May 10, 2018 2:20 am
Forum: Stirling and "Hot Air" Engine Forum
Topic: Connecting Rod of a Gamma-configuration Sterling Engine
Replies: 1
Views: 472

Re: Connecting Rod of a Gamma-configuration Sterling Engine

Don't know, I would have to see the motor, but a guess would be that it is a tin can motor, and the displacer is vertical, gravity takes the displacer down and the crank lifts it up, so it only has to be able to take tension. The power piston has to push against the crank, so it must be ridged. Ian ...