Steam Q & A

[derekwarner_decoy]

Hi PD's.......thanks.........as Alistair came back & confirmed

"The rod coming upwards is linked to a rev counter. As far as I remember this is a comparatively recent addition"
 
----- Original Question -----
From: derekwarner_decoy (forum@paddleducks.co.uk)

1) we see the Engineer at his engine console obeying the engine commands  from bridge telegraph.......to the rear of the console [toward the engine] we see a thin [1/2"diameter] vertical shaft [6 1/2'high] & moving up & down with each revolution of the engine.... what is this control rod do  

2) The other surprising item of note is that the engine speed seems to build up to approx 45 RPM which is higher than I imagined

3) a new third question.....the engine console gauge set, two gauges on top & three below..... the center lower gauge appears to hunt between 70 PSI to 110 PSI with each engine revolution... this is what I seem to remember as a six year old viewing the engines of the South Steyene in the 1950's

I have purchased a second 3/4"gauge from ACS & a 1 1/8" from Anton for this purpose... but what are we seeing :?:

Is this  :idea: the decaying expansion of steam in one path :arrow:

  I promised  :rant I will not ask too much more about that P1,V1, on T1 thing again - Derek :twisted:    :music

[Red_Hamish]

Hello all, Derek oh to be technically minded !! You managed to lose me in the first four words of the new question in Part 3 then totally lost me on the rhwetorical surmising of the question. Do I really want to get into steam?

cheers

Jim

[derekwarner_decoy]

Hi PD's - oh I wish Jim....when I see something I  try & wonder what the answer could be :idea:  :?:  :idea:  :?:

Naturally all of the THIRST for knowledge can be greatly assisted by   or two which usually leads to the  :computer where I ask the question

....... From memory our Australian PS Marion has a similar FIVE X steam gauge console set to PS Waverley so one of our OZ paddler members may be able to offer  the  :news  & the answer - Derek  

Oh BTW....did you know Jim that the SUBAROOOOOOOOO'O car people are considering a STEAM power version of your Forrester that floats on water  :?:  :  :twisted:  :

[kiwimodeller]

Where did Jim get a Forrester that floats on water??? How come us ordinary mortals can't buy one like that let alone a steam powered one :  :x

[AlistairD]

What is a Forrester?
 Â 
 Â 
 Alistair in Scotland
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 PS Happy New Year to all paddleduckers
 Â 
 Â 
 ----- Original Message -----
 

  From:    kiwimodeller (livesteam@paddleducks.co.uk)
   To: livesteam@paddleducks.co.uk (livesteam@paddleducks.co.uk)    
   Sent: Sunday, December 31, 2006 10:37    AM
   Subject: RE: Steam Q & A
   

   
Where did Jim get a Forrester that floats on water???    How come us ordinary mortals can't buy one like that let alone a steam powered    one    



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[derekwarner_decoy]

Hi PD's......here is another snap of PS Marions engine gauge set from January 2004... Derek

[derekwarner_decoy]

Hi PD's ---- David came back with...

about 45rpm is the normal cruising speed - if I get on board this year I'll come back with a confirmation, but you'll have to wait till May as its midwinter here.

A few years ago I was lucky enough to see the engines opened "flat out" - that was either 56rpm or 58rpm - looked very impressive.

Thanks David... would she [Waverleys engine] have a critical resonance RPM range [say 20 >22 RPM] :?: where the floor plates & engine sound as if they will EXPLODE  :boom    :?:  :?:

I have ZERO experience with steam up&downer engines, but understand that most if not all two stroke diesel engines [2,000 to 10,000 SHP] have this critical resonance

In days of old the Chief Engineer would drive the advancing speed throught that eg., [78 to 80 RPM red band] on the E/R tachometer - but these days it is bridge controll via a computer  :nose   & hope for the  :arrow: best....................Derek

[derekwarner_decoy]

Hi PD's....a question for.....the loony one with a perpetual smile of rapture to be found in the souvenir shop or the gangway

Morning Walter   ....this is a little off the [MV Balmoral] track, however you may well be the only PD who can answer...

On PS Waverley....if she were DEAD slow ahead>>>>> & the bridge rang down for DEAD slow astern<<<<<.....what sort of time frame exists for the Engineer to complete this/these actions :?:....[close off steam...stop the engine...rotate the steam reversing hand wheel 10 revolutions, reopen the steam supply valve] &  all being manual operations   .....I have spent a few hours on the Waverley WEB site but cannot find any reference to this

This is not a  academic question :rant .... as the reversing linkage function on my JMC3H is required to be set by a servo slowdown to approx 3 seconds.....so [kill the steam on the Tx [right stick] .....wait until the wheel revolutions are ZERO..... = approx 3 seconds....S/W function 5 on the Tx =  + 3 seconds to reverse, + a second or so on the Tx [right stick] the re-apply steam........

So now you can see the issue......[3 seconds + 3 seconds + 1 second] = quite a distance travelled by 19 Kg of PS Decoy irrespective of the actual speed........ :ohno

[Walter Snowdon]

Sorry Derek, I cant answer that as I am not into the technicalities of her engines- from looking at her in action, I know it is a very short time. BUT.... there is a very quiet paddleduck out there who will know the answer as he is an engineer on Waverley!. So come on CORKY- put down your copy of "Lady dont fall Back" and answer this query. Regards, Walter.