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Author Topic: Steam engine from China qb3  (Read 8077 times)

derekwarner

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Re: Steam engine from China qb3
« Reply #75 on: March 16, 2020, 07:41:44 am »

Yes...... :o ...each Japanese SAITO steam engine has inlet and exhaust outlet tube retaining nuts are M7.0 mm x 1.0 P......... O0


As Carl says .........it is good that many manufacturers have adopted the 1/4" x 40 TPI as their standard tube/nut connection......


[but any member with a beautifully/functional Niggle Glass Quatrz tubed lubricator will find the tube connections are M6 x 0.75P threaded connections]



Derek
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Derek Warner

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Illawarra Live Steamers Co-op
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www.ils.org.au

southsteyne2

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Re: Steam engine from China qb3
« Reply #76 on: March 17, 2020, 02:19:50 am »

Come on Derek not much Brasso here ,have you launched Decoy yet ?
CheersJohn

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carlfmiller

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Help with Photos please
« Reply #77 on: April 06, 2020, 02:12:48 am »

Need a little help, I want to start a new thread on how to make the leather upholstery on a model boat, I have it written but needs to have in-line (embedded) photos and I cannot tell how to do that in this forum. Can somebody remind me how this is done?


Here's a view of what I want to describe, but no longer relevant to this thread


And why cannot I not see the photo attachments in the preview?


Grrr   


Carl



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KNO3

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Re: Steam engine from China qb3
« Reply #78 on: May 01, 2020, 10:36:00 am »

If you upload the pictures he'd top the forum, I don't think there's a way to display them as you'd like in a single posting.
But there is a work around: make a new post for each picture (or group that fits together with the same description), that way the text stays together with the corresponding picture.
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barriew

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Re: Steam engine from China qb3
« Reply #79 on: May 01, 2020, 02:53:31 pm »

If you use a picture host rather than the attachment facility, you can insert the photo link in your text where you want. I assume the Mayhem picture host works this way but haven't used it.


Hope this helps,


Barrie
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carlfmiller

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Re: Steam engine from China qb3
« Reply #80 on: June 25, 2020, 05:34:32 am »

Raphael I need a memory jog. In some forum you had some sage words abut how to adjust the Microcosm P5 gas attenuator. I need to try doing it, never got to it and now I forget where you told me that good stuff. Do you rememner? or if not can you tell me again the sequence for adjusting the P5 after the diaphragm is replaced?  My unit is totaloy ut of adjustment since I messed with it.


The M29 with P5 is in my launch Cecilia which is a separate thread but I don't find the subject there.


And BTW I see in this thread I made some references to the build I was doing of the cllnker style launch with TVR1A and 3" boiler.  I finally go it to the water and it is a big success and a lot of fun to see go.


https://www.youtube.com/watch?v=EglzcUZKxzU


Carl



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rhavrane

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Re: Steam engine from China qb3
« Reply #81 on: June 25, 2020, 07:56:00 pm »

Bonjour Carl,
I would be very happy if my videos (In French, sorry) would help you. Here are the ones I talk about adjustents.
My process is simple, I adjust my attenuators step by step :
  1 - I close the little idle screw to hear if the pressure acts when the steam part is dismantled and wheb I press on the piston with my finger. The fire might almost die., not obvious on this example : [/size]https://www.youtube.com/watch?v=qE5naje6s7g
  2 - If Ok, I keep the screw closed and install the attenuator to see at which pressure it operates. Adjust it by unscrewig the spring to low or scewring it to raise the target pressure (personally, I like 30 PSI)
  3 - When this is OK, adjust the idle screw which is VERY sensitive ! A few degrees ans it is full open, as if you had no attenuator, main issue for lot of us :
https://www.youtube.com/watch?v=pvwAnXhN4WE
I hope this will help you.
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RaphaŽl
RaphaŽlopoulos Steam Lines UnLimited
Membre du Modele Yacht Club de Paris http://mycparis.fr/
Membre de l'Offshore Club de Paris : http://site-ocparis.wifeo.com/
My YouTube channel: http://www.youtube.com/user/rhavrane

carlfmiller

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Re: Steam engine from China qb3
« Reply #82 on: June 26, 2020, 09:31:51 pm »

Jin now sells a pack of the diaphragms for the P5.


https://www.ebay.co.uk/itm/153869304544


 The implication of having so many is that the diaphragm needs frequent replacement.  Is this really the  case? My usage is very low so I don't see why the diaphragm should fail unless it gets rotten.


Thanks for the instruction above, just one question-- in step two, is the flow screw closed completely? If it is closed completely, how is there any flow during the adjustment?


Carl
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rhavrane

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Re: Steam engine from China qb3
« Reply #83 on: June 26, 2020, 10:55:14 pm »

Bonjour Carl,
To my opinion, Jin's diaphragms are made of rubber, hence their quick deformation and the need to change them often,
https://www.youtube.com/watch?v=aU37YAuOkKM Furthermore, rubber becomes hard as wood aftera while: https://www.youtube.com/watch?v=a56Y87gb-NU
that's why I use 0,5 mm nitrile : https://www.youtube.com/watch?v=5JUTaTuS-N0


My step 2 is to be sure that the idle screw is closed enough to hear when the pressure operates the shutdown. As I say, I wish to adjust one parameter after another.

It does not matter if the gas is closed or not, I make several trials by making the pressure drop. Hopefully, on most of the attenuators I have, even full screwed, there is some gas passing through, enough to be heard but not enough to have a reliable idle level in the wind of the pond, otherwise I have to light again the torch when the gas comes back with the dropped pressure.


When I have adjusted the spring on step 2, The pressure parameter is set, I drop one more time the pressure, the gas comes back full speed and I go to step 3 which is, as say, very accurate because a few little degrees on the neddle screw change everything as you can hear it on my videos.


I am sorry if I am not accurate enough, do not hesitate to ask further information if needed.
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RaphaŽl
RaphaŽlopoulos Steam Lines UnLimited
Membre du Modele Yacht Club de Paris http://mycparis.fr/
Membre de l'Offshore Club de Paris : http://site-ocparis.wifeo.com/
My YouTube channel: http://www.youtube.com/user/rhavrane

carlfmiller

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Re: Steam engine from China qb3
« Reply #84 on: April 30, 2021, 03:53:19 am »

It's almost a year later. I took my P5 apart and replaced the diaphragms (what a funny word) and in being forced to rebuild it, I learned how it operates and which way to turn the thumb screw. (clockwise on the thread increases the cut-off pressure--again, so "obvious" nobody said it) I have it set again at 30psi, and Cecilia with her Microcosm M29 is ready for another splash. I followed Rafael's steps, easy.


I didn't see a pack of spare diaframs (there, much better spelling) offered from Jim, so I wrote and asked and he is supposedly sending me 6 pairs for $25US.   I didn't attempt to obtain nitrile and make my own-- who could make replacements at $2 a pop?


And now Jin has the P5B-- does anybody have that and does it work?  Looks smaller/simpler. I wonder, probably has the same life limitation as the P5?  But maybe it has only a single diafram.  Experience, anyone?


BTW back to the thread start-- I see Q3B and its reverser valve looks sweet.   I looked at the Q2 but it is sold out, and was pretty expensive anyway.  Nice on-line video of it. Q3B seems a little expensive as well, in my opinion.


But who knows what Jin's M36 engine does? It sure looks like the MSM Avon but bigger.  B x S is 10 x 12mm; He says displacement is 7.6cc but I calculate r2 x pi x L x 2 x 2= 25 x 3.14 x 12 x 4= 3.76cc , or what did I do wrong?  Seems like a deal for only $210 and free shipping to US.  I cannot find a video of it, or anyone's experience with it.    The reverser valve looks like a nice tight fit, no leaks up there. And the outrider bearing looks very substantial.  This ought to be a winner, why not?


http://www.microcosm-engine.com/m36-new-twin-cylinder-oscillating-engine-p-166.html#.YItwFi9h1QM


-Carl



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rhavrane

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Re: Steam engine from China qb3
« Reply #85 on: April 30, 2021, 08:18:15 am »

Bonjour Cartl
Your calculations are correct, I find 3,78 cm3  ok2
I have not this machine but several oscillating ones and 60PSI (+/-4 bar) seems too much as operating pressure to my opinion.
And about prices, the demand makes the offer in our case as there are less and less manufacturers, especially in France  :((
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RaphaŽl
RaphaŽlopoulos Steam Lines UnLimited
Membre du Modele Yacht Club de Paris http://mycparis.fr/
Membre de l'Offshore Club de Paris : http://site-ocparis.wifeo.com/
My YouTube channel: http://www.youtube.com/user/rhavrane

carlfmiller

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Microcosm M36
« Reply #86 on: May 04, 2021, 08:50:25 pm »

I am curious about the Microcosm M36, so I ordered one. Jin sent me a cryptic note that it might leak-- which of course an oscillator will do, so no way 60psi, more like 25psi, and let's see what it can do. I also ordered another M29 with a 85mm vertical boiler to see what sort of boat that will go in.  Hmmmm-- I might have more engines than boats-- any suggestions?   %)
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