Whispergen mk4

Discussion on Stirling or "hot air" engines (all types)
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staska
Posts: 25
Joined: Thu Sep 05, 2013 10:10 am

Whispergen mk4

Post by staska » Wed May 16, 2018 5:56 am

Just got two of these, dissasembling and cleaning them. Bought for scrap price as natural gas boiler. With some pressure. But not nominal.

Sad part - small rust on piston, very minor on cylinder and a lot of gum/limescale on water side of cold heat exchanger..
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Ian S C
Posts: 2137
Joined: Thu Dec 02, 2010 5:15 am
Location: New Zealand

Re: Whispergen mk4

Post by Ian S C » Thu May 17, 2018 2:21 am

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

Blaf
Posts: 30
Joined: Fri Mar 02, 2018 2:50 am

Re: Whispergen mk4

Post by Blaf » Thu May 17, 2018 2:26 am

Damn, where did you manage to get them for scrap price? I want one too! :)

Ian S C
Posts: 2137
Joined: Thu Dec 02, 2010 5:15 am
Location: New Zealand

Re: Whispergen mk4

Post by Ian S C » Fri May 18, 2018 3:03 am

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, and talk Stirling Engines, and there is no hope of getting a motor.(never say never).
I sent a message off to Peter Lyne in Ashburton NZ, just down the road from here, he was in on the motor from it's earliest days. At least he may be amused, or interested to know that they have been around long enough to become scrap.
Ian S C

staska
Posts: 25
Joined: Thu Sep 05, 2013 10:10 am

Re: Whispergen mk4

Post by staska » Sun May 20, 2018 5:01 am

Mk5 was quite popular in germany, you could get them on ebay.de for 150 ey for not working, 1000-1500 used, 3000++ for new. But they have cracking hot side heat exchangers.

About mine - do not imagine too. On one motor lime scale popped up cold heat exchanger and water got inside. On other dont imagine. Not dry nitrogen ?

Ian - any ideas on using them not on natural gas ?

Ps. It is still good feeling to have this nasa level technology in garage :)

staska
Posts: 25
Joined: Thu Sep 05, 2013 10:10 am

Re: Whispergen mk4

Post by staska » Sun May 20, 2018 9:56 am

Adittionally - if you will get in touch with one of authors, could you ask for some info on lubrication, assembly, gap in piston rings etc..

cbstirling2
Posts: 143
Joined: Sat Dec 17, 2016 9:35 pm

Re: Whispergen mk4

Post by cbstirling2 » Fri May 25, 2018 1:08 am

So cool!
CBStirling2

cbstirling2
Posts: 143
Joined: Sat Dec 17, 2016 9:35 pm

Re: Whispergen mk4

Post by cbstirling2 » Fri May 25, 2018 1:09 am

staska wrote:Mk5 was quite popular in germany, you could get them on ebay.de for 150 ey for not working, 1000-1500 used, 3000++ for new. But they have cracking hot side heat exchangers.

About mine - do not imagine too. On one motor lime scale popped up cold heat exchanger and water got inside. On other dont imagine. Not dry nitrogen ?

Ian - any ideas on using them not on natural gas ?

Ps. It is still good feeling to have this nasa level technology in garage :)
In the USA, the administration thinks those technologies are part of an elaborate hoax.
CBStirling2

Ian S C
Posts: 2137
Joined: Thu Dec 02, 2010 5:15 am
Location: New Zealand

Re: Whispergen mk4

Post by Ian S C » Fri May 25, 2018 3:19 am

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 Dr Clucas is these days, he designed it.

staska
Posts: 25
Joined: Thu Sep 05, 2013 10:10 am

Re: Whispergen mk4

Post by staska » Wed May 30, 2018 9:00 am

thanks for reply. I know that sad history of whisper gen. And any other kinematic stirling. And looking into it as mechanist with some metalworking knowledge and having lathes - it should be simplified.
Now in the middle of cleaning. And dissambling cold hx and liner.

Solid fuel or not - ground charcoal to powder and mix with water. it will burn with preheated air nicely. and handle as well as diesel.

Ian S C
Posts: 2137
Joined: Thu Dec 02, 2010 5:15 am
Location: New Zealand

Re: Whispergen mk4

Post by Ian S C » Thu May 31, 2018 1:32 am

I wonder if wood pellets as used in pellet fires could be used for heating.
Ian S C

Ian S C
Posts: 2137
Joined: Thu Dec 02, 2010 5:15 am
Location: New Zealand

Re: Whispergen mk4

Post by Ian S C » Thu May 31, 2018 6:27 am

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

staska
Posts: 25
Joined: Thu Sep 05, 2013 10:10 am

Re: Whispergen mk4

Post by staska » Thu May 31, 2018 6:30 am

Pellets yes if super quality. But no - when to much ash. I am using them for heating, quality is not constant. I will make more photo. As far as i can see and feel - it some kind of moly or graphite filled grease. Not 10w40 sure.

Ian S C
Posts: 2137
Joined: Thu Dec 02, 2010 5:15 am
Location: New Zealand

Re: Whispergen mk4

Post by Ian S C » Fri Jun 01, 2018 1:58 am

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

cbstirling2
Posts: 143
Joined: Sat Dec 17, 2016 9:35 pm

Re: Whispergen mk4

Post by cbstirling2 » Sun Jun 24, 2018 6:06 am

Any luck getting the whisper gen running again?
CBStirling2

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