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Author Topic: It Works!!  (Read 2590 times)

MichaelK

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Re: It Works!!
« Reply #25 on: November 22, 2011, 10:39:16 AM »
Ian,
Two good qestions,
I'm not too sure about the valve, on the bench it was brilliant, however after runniing it in the proper enviroment , maybe it is installed upsidedown?? The valve does'nt seem to shut off completly at full steam pressure (2.5bar, when the saftey valve blows off) Does any one have experiece with the DRG valve? I think that it only might work properly with the pressure going 1 way, so the pressure from the steam  seals the valve seat properly.
 Without the flywheel,      I think the prop, working in the water, acts as the flywheel. After the first run, a flywheel seems not to be neccessary. Maybe in the future, when I've got more experience and on-water time,  ?????
Thanks for your interest
Mick

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Ted Welding

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Re: It Works!!
« Reply #26 on: November 22, 2011, 10:59:26 AM »
Mick,

I don't have any experience of the DRG valve, but from the look of it I assume it has an internal disc that rotates to progressively expose holes in the underlying seating plate, and allow steam to pass.  The disc in these valves are generally not fixed directly to the operating shaft, but are held in contact with the seating plate by means of a spring. Incoming steam normally comes in on the rotating disc side of the set-up and keeps the disc firmly pressed against the seating plate.  If the steam comes in the other way, it will still work, but will tend to lift the disc off the seating plate, and allow steam to escape round the disc, particularly when closed down.  From the photo you posted, I wonder whether the valve is working in this fashion, as I would have expected to see the steam coming in on the same side as the disc operating mechanism. If so it's just neccessary to reverse the valve so steam is coming through the valve in the other direction.

As I say, I don't have direct experience of this valve, so please feel free to shoot me down, blow raspberries, etc!

Regards

Ted
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Circlip

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Re: It Works!!
« Reply #27 on: November 22, 2011, 02:08:08 PM »
Wish people wouldn't keep calling steam drying coils superheaters. Even the toy trains fitted with loops in the fire tubes don't superheat the steam, they are however successful at drying it. You might not think it's effective cos the performance doesn't increase (or decrease) but dry steam is better than wet.  O0 :-))

  Regards  Ian.
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ooyah/2

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Re: It Works!!
« Reply #28 on: November 22, 2011, 07:59:30 PM »
Quote from: Circlip on November 22, 2011, 02:08:08 PM
Wish people wouldn't keep calling steam drying coils superheaters. Even the toy trains fitted with loops in the fire tubes don't superheat the steam, they are however successful at drying it. You might not think it's effective cos the performance doesn't increase (or decrease) but dry steam is better than wet.  O0 :-))

  Regards  Ian.

Ian ,
You won't get people to stop calling them super heaters when commercial boiler makers still wrongly call them "Superheaters "

George.
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MichaelK

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Re: It Works!!
« Reply #29 on: November 23, 2011, 06:27:16 AM »
 OK, I took out the steam drying thingo,  O0 did'nt make any difference to the amount of water I was wasting at start-up! <*<
Mick
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MichaelK

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Re: It Works!!
« Reply #30 on: November 23, 2011, 06:32:39 AM »
Ted,
Your comment is what my gut feeling is.  O0
It is also a case of controlling (by servo) the regulator. There is'nt a lot of space in the engine room, {:-{ as it is I have to lean the whole plant over on it's side to install and remove. However, these little things are sent to try us I suppose. >>:-(
I will reverse the reg, and let you know of the results.
Mick
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Circlip

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Re: It Works!!
« Reply #31 on: November 23, 2011, 07:38:22 AM »
Your waste water at start up will always happen Mick, unless you attack everything outside the boiler with a blow torch, it's condensation and despite any lagging will be present untill the system "gets up to temperature" so in our sizes, is lagging really neccessary? Saves burning ones self on hot metal.

  Yes George, why cloud a good sales pitch with the truth? Some will always be impressed with the virtues of snake oil.

   Regards   Ian.
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You might not like what I say, but that doesn't mean I'm wrong.
 
What I said is not what you  think you heard.

MichaelK

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Re: It Works!!
« Reply #32 on: November 23, 2011, 08:11:13 AM »
Thanks Ian,
At this stage, I'm letting the startup water go into a Heinz BakedBean can :embarrassed: (off site), then swaping the plastic pipe from the exhaust to run through the condenser.
It seems to work! :}
Early stages in this Lady's life! O0
Mick
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Circlip

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Re: It Works!!
« Reply #33 on: November 23, 2011, 09:37:15 AM »
All other things aside, the boat and plant look superb, wasn't trying to put a "dampener" on the post.

  (Coat on and typing from halfway down the yard)

  Regards  Ian.
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You might not like what I say, but that doesn't mean I'm wrong.
 
What I said is not what you  think you heard.

ooyah/2

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Re: It Works!!
« Reply #34 on: November 23, 2011, 01:39:46 PM »
Ian,
I would have thought that you had inside loo's by now , rather having to put your coat on to get to the bottom of the yard.
Mind you I have seen loo's with phones but never plugs for lap tops.

George.
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MichaelK

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Re: It Works!!
« Reply #35 on: December 04, 2011, 05:56:26 AM »
Quote from: MichaelK on November 22, 2011, 10:39:16 AM
Ian,
Two good qestions,
I'm not too sure about the valve, on the bench it was brilliant, however after runniing it in the proper enviroment , maybe it is installed upsidedown?? The valve does'nt seem to shut off completly at full steam pressure (2.5bar, when the saftey valve blows off) Does any one have experiece with the DRG valve? I think that it only might work properly with the pressure going 1 way, so the pressure from the steam  seals the valve seat properly.
 Without the flywheel,      I think the prop, working in the water, acts as the flywheel. After the first run, a flywheel seems not to be neccessary. Maybe in the future, when I've got more experience and on-water time,  ?????
Thanks for your interest
Mick


An update
I reversed the valve, so that the steam enters the side where the actuating arm is, and now it shuts off completly

Regarding the flywheel, it dos'ent seem to be necessary. I had the motor ticking over super slow this morning, slow enough that the baot was'nt making headway against the breeze
Worked fine!
Mick
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charles fitton

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Thanks Mick..
« Reply #36 on: December 14, 2011, 12:41:07 PM »

Charles try http://www.john-tom.com/MyPlans/Steam%20Engines/ModelSteam%20BoatPlans/DampfPinasse/SteamBoatPinasse.pdf
There is lots of interesting stuff on the john-tom website. :-)


I did- and I like the plans. Been there often enough , Can't imagine why I didn't find them before...

f
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MichaelK

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Re: It Works!!
« Reply #37 on: December 15, 2011, 10:04:01 AM »
Hi Charles,
If you go down the same road (stream?) as I did, remember!     that there is a little bit of a "whoops" toward the bows, due to the oroginal plan been folded and bent and photocopied before it was put up on the net.
I gor over that little problem, I'm sure you can too. :-))
Good luck
Mick
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MichaelK

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Re: It Works!!
« Reply #38 on: December 20, 2011, 06:37:11 AM »
I've finally got round to you-tubing my boat! O0

Try to ignore the commentary!! <:(

http://www.youtube.com/watch?v=kxNZjt0Fa9s

I think that you might have to copy and paste the link. Or is it frowned upon to put youtube videos on this site? {:-{
Mick



This is fine.  Just click on the link to see Mick's film
ken
« Last Edit: December 20, 2011, 04:25:23 PM by Tug---Kenny »
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