Tag Archives: leak compound steam

Spring ’24 – work so far

Well, as we reach March 2024, I should jot down some notes on the work being undertaken this winter.

Work done

We made a list of jobs to be done back when we fetched Befur out last autumn. The completed work is shown below in Green, still to be done in Red:

  1. Cleaning the inside of the boiler, removing oil t0 improve efficiency (reduce fuel consumption) Done – notes and video here
  2. Cleaning the inside of the condenser, for same reasons and improve vacuum – Done – notes with Boiler Work above.
  3. Remachining the LP crosshead and glands as it is now clear that this is the principal source of the hateful knocking the engine makes. – LP Done – see below
  4. Replacing the pump drive worm box, as this is at the point of failure, and adding “assistance springs” to reduce the torque requirements on this box, to extend its probable life! (probably another post here too). – See below
  5. Replumbing the condenser to be “contraflow” as this should improve it’s efficiency too.
  6. Attempting to design and fit a clutch to the prop drive to allow it to freewheel when sailing.
  7. Attention to paint and varnish
  8. Possibly fitting a reinforcing  inner fore-deck and removing the anchor chocks and resealing to improve weatherproofing.

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A review of 2022 & Happy Christmas

Waiting to Tow Aurora back to Ferry Nab

An apology – we’re not dead!

Well, I guess that’s what progress looks like – I haven’t written a thing since we re-launched in May, so it’s actually been going rather well! But a tentative phone call from friends in Australia to discover if Befur’s lack of posting indicated we were no longer shuffling along this mortal coil suggested it was time to write something!…. But, all is well, Lou, I and Befur are in good fettle….

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Getting to the end of the worklist

I’m falling behind! No progress update since January – sorry.

We have been working hard to get her ready for re-entering the water… This winter’s workslist has turned into quite a major refit.

The list below shows the work we are undertaking, and all is completed except installing the engine and the work on mast and rigging.

Maintenance

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Comparing old and new valve timing

As a last post on the subject of correcting the valve timing on the Leak  Compound in Befur (prior to “sea trials” later in the year), here we will look at the results from the static (blowing) valve timing tests, and compare to the results prior to rebuild. But first a video of it running on air with the new timing…

I just updated this post to improve the pictures and ordering to allow simpler comparisons between old and new timing data.

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Valve Setting on a Leak Compound

This time we are looking at how to fix the problems with the Leak’s valve gear design. This is now part of our Leak Hints and Tips section on the known errors or problems with Leak design……

As we get to the end of January 2022, the tuning/rebuild/shopping of Befur’s engine continues, once this is complete we can get on with the list of hull and fittings-related work. But it seems we should at least explain what work the last few months have contained…

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Progress – a new scotch crank pump drive

A last quick post for the day, then it’s back to the cold workshop….

The pump drive on Befur has been an on-going source of angst and failure… So we redesigned and rebuilt it!

This appears to be much better, and pending final cleaning, plating etc. here is a video of it in action on the bench!

A Digital Engine Indicator

The Digital Engine Indicator

The Digital Engine Indicator

As my first job was working as an Instrument Technician for Shell Research in the Applied Physics department, I became interested in the measurement of physical systems… thus I was interested in Engine Indicators as a tool for evaluating engine performance, and measuring valve events and gas-flow in steam and very large marine diesels.

 

An Engine Indicator – Wikipedia Commons Image

Given my later life in computing I concluded that a digital version of one of these instruments could be made to evaluate the performance of Befur’s engine.

I penned an article for The SBA’s Funnel magazine, but the publication of this has been delayed, so I am publishing it here for those interested.

It’s still a prototype, and in need of further development, but it has provided some interesting data – which at least prompted further analysis and investigations into what happens inside Befur’e engine…

I have attached to this post a PDF describing the Digital Engine Indicator, which you can read and download here

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Engine Rebuild – Valve timing analysis

As you may have seen from earlier posts, and here we are embarking on a major winter “shopping” of Befur, to address a number of problems.

Measuring the valve timing on the bench

One of these tasks is to analyse and reset the valve timing of the engine to improve efficiency and performance. Continue reading

Winter Work (some progress)

 

 

Well, we have been working on the list we made in the last post, and have some positive news, and some better understanding of the problems…

Wear

I spent a couple of days with the engine on the bench and a dial indicator attempting to find and measure the wear or absence of same…. We have a page or two of measurements…

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