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CLUB NIGHT 15th OCTOBER 2024 – SUBMARINE ESCAPE.
On a dark wet night when nobody really wants to travel, there is at least our MSRVS club night at Longford Lane to look forward to. Our speaker for the evening, Graham Stubbs regularly makes the 50 mile trip up the M5, along with Dan Cutting, as they are staunch club members who thankfully don’t seem to mind the dark wet nights. Must be made of some stern stuff! This talk was the follow up to Graham’s talk from June last year, when he gave us an insight into his experience as a young man entering the Royal Navy. It’s a tough life in the Navy, as anyone who has ever served will let you know. Grahams chosen career was in submarines, which requires exacting training with regard to operations and safety. Long before setting foot aboard a submarine, there is some serious training to face, for instance, how to escape a stricken vessel that could be hundreds of feet below the surface of the sea!
Graham showed pictures of the Submarine Escape Tower, located in Fort Blockhouse, a former military training site in Gosport (opposite His Majesties Naval Base in Portsmouth). The tower, built between 1949 and 1953, was conceived after a report by Captain Phillip Ruck-Keene just after WW2, to revamp submarine escape procedures in the face of advancing technology and submarine design. War tends to rapidly advance technology, and many lessons had to be leaned, particularly from such accidents as HMS Thetis and HMS Truculent, in which both civilian and military personnel were lost needlessly. Paul Barnett is booked to give a talk on HMS Thetis in June 2026. Will have to wait for that one. The Submarine Escape Tower houses the Submarine Escape Training Tank (S.E.T.T.), which is 20 feet in diameter and holds 100 foot head of water. That’s 200,000 gallons of water, which incidentally, was kept at 34 degrees centigrade ( 94 degrees Fahrenheit ) possibly due to the fact that the instructors are in it throughout each day.
The tank mimics the two main methods of escape. First , the non preferred way , Compartmental, which utilises either the forward (Torpedo Room) or the aft (Engine Room) compartments, each of which is sealed from the main central cabin by watertight bulkheads. Secondly, the preferred method, Tower Escape, in which a tall cylindrical vessel ( built into the main cabin ) big enough for 2 men (at a time) to enter, is closed from the cabin, then flooded by outside water via a hatch in the top, where the 2 men can escape straight up to the surface. Each man would be wearing a bright orange escape suit, which was double skinned and inflated with air for breathing and sufficient buoyancy for a quick ascent to the surface. Facilities at the bottom of the tower allowed groups of trainees to practice these 2 methods. Even at 100 foot depth, the water pressure is around 50 PSI ( 3.5 barg) above atmospheric, so the escapee’s would start with a deep breath and release air all the way to the surface to relieve built up lung pressure from depth back to atmospheric when they reached the surface of the water. Failure to release the air gradually could result in exploded lungs, which would be fatal. The tank has a cable running up the centre to help guide each escapee and prevent them from colliding with the sides of the tank. The inflated escape suits are not particularly hydrodynamic, so may wander sideways on their way to the surface. In a real escape situation in the open sea, there is not likely to be any obstacles to collide with between the stricken submarine and the surface of the water.
Before trainees attempt the full 100 foot escape, there are 2 other platforms higher up the tank for 30 foot and 60 foot depth escapes. These escapes are performed by trainees who are wearing only swimming trunks, and used primarily to practice the slow release of air upon ascent to the surface. No breathing apparatus or air supply is used for this part of the training. The escape cylinder containing a trainee and an instructor, would be flooded. A curtain hanging from the top of the cylinder would trap enough air in the flooding cylinder for a deep breath before the trainee ducked under the curtain and into the main tank. The instructor would not release the trainee until he is blowing hard, such is the serious nature of ascent through water, even from a depth of 30 feet.
All trainees upon reaching the surface, would climb out onto the platform and rest for a few minutes so they could be assessed as fully recovered from the exercise. Apart from Graham having partaken in this training, in the audience was Nigel Graham, who had also experienced these escapes when he was a civilian contractor working in the Tower. Nigel shared his experiences with us and described some updates made in the facility since Graham’s training days.
The Tower was commissioned for use in July 1953 and tens of thousands have since trained in it before it was closed in 2020. Due to the advances in submarine design and updated escape procedures, the tower is no longer required as a training facility, but it remains as a listed building. Trainees completing the Tower training programme would then receive their ‘Submarine Pay’, but with more training to come, they were still a long way from actually boarding a submarine for active service.
Derek England.
CLUB NIGHT TALK 17th SEPTEMBER 2024 – PHRASES, SAYINGS AND PROVERBS – AND THEIR ORIGINS.
For September, we had a new take on the talk. No engineering or pioneer based subjects, and not a hint of steam engines! It was my turn to talk on a subject I have found interesting since I studied languages back in school. Phrases, sayings and Proverbs form a part of our everyday language, but how much do we know about their origins and true meanings?
I brought along a list of 34 phrases, sayings, proverbs, and even words that had changed meaning, so as to be sure of having sufficient material for an hour’s talk. Thankfully, comments and chat from the members ensured that by number 29, we were about an hour and twenty minutes in and it was time to curtail the talk for the all important raffle! I kept the definitions and explanations as light and humorous as I could, hoping not to bore everyone with one of my pet interests. Then I finished up with the expression “There’s no fool like an old fool” followed by the admission that I had reached 73 years of age that day. Then out of the blue, Liz Kidley presented me with a birthday cake, which was cut into slices to share with all those present.
I am not a public speaker and only have experience addressing meetings of project engineering staff. Apart from that, I have been the Spokesman whilst on Jury Service about ten years ago. That was quite a stimulating experience. This all goes to show that anyone who has an interest or passion that they have studied, can give a reasonable talk at our MSRVS club nights, or for any other small gathering. Many other MSRVS members have given memorable talks in the past, without having lots of experience as speakers.
CLUB NIGHT 16th JULY 2024 – MOVIE NIGHT – FILM DOCUMENTARY ON STEAM ENGINE DEVELOPMENT.
Well it’s summertime and the steam up/rally season for MSRVS members, as well as for many other like minded souls, is well under way. Despite some poor weather, there have been some good meetings with many new memories made. Our July Club Night meeting featured a documentary film about the origins of steam as the driving force behind the industrial revolution, particularly in the fields of mass production and transport. Who would be a better person to talk us through this rich and important history than Mr Fred Dibnah! Fred’s very down to earth analysis and description of the engineering and politics makes easy listening for non technically minded people, and food for reflection for the more involved devotees of steam. If only Fred were still with us and available to deliver a talk in person! However, we were able to bring out the Club projector to watch Fred’s work via DVD. Thankfully the modern electronic technology has been used to record the history of old technology for us to reflect on, in this wonderful hobby of operating steam engines.
Fred talked us through from Thomas Newcomen’s early beam engines of 1712, for pumping water out of deep mines, through to Richard Trevithick’s road going ‘Puffing Devil’ steam powered engine. A replica of this engine was built, and registered for use on the road in 2001, to commemorate 100 years since the original engine of 1801, and the substantial improvements made between Newcomen’s and Trevithick’s time. Newcomen’s engine was of low pressure steam, which having delivered one stroke of the piston, the steam was condensed in the cylinder to effect an ‘atmospheric’ second stroke to bring the piston back to the top of it’s stroke. Trevithick used Boulton and Watt’s improved principle of an external condenser to prevent constant heating and cooling of the cylinder, thus improving fuel efficiency. Trevithick had a constant battle with Boulton and Watt for use of their patents without royalty payment, and fitted ‘Puffing Devil’ with a double acting cylinder arrangement. The need for an external condenser was overcome by ejecting the spent steam from the cylinder directly to atmosphere up a chimney.
Talking among ourselves after the film, It was easy to compare the pioneering work done during those early years to the more leisurely and enjoyable pastime experienced by today’s steam engine operators, and for those who just love to watch. I’m not saying that operating a modern engine is easy, and it certainly is not. There is a lot of time and trouble needed to prepare an engine for a show. Not to mention the expense. However, those early pioneers had little precedent to follow when developing efficient steam power. There were no material stockists, engineering standards or accessible fuel suppliers to rely upon, so all these things needed to be developed, and that takes time.
I can’t help thinking that the modern engine operators at the steam ups and rallies have a more encompassing experience than those former engineers. Camper vans and families are nowadays there to enhance a weekend gathering. Drivers are relaxed with one hand on the steering wheel as they cruise around on their engines, enjoying the passion of those pioneers and explorers of earlier times.
Derek England.
CLUB NIGHT 18th JUNE 2024 – A COUNTY GOES TO WAR – LAND GIRLS, VINDI BOYS, DAD’S ARMY AND MUM’S THE WORD.
The listed talk for Tuesday was regarding HMS Thetis, a submarine disaster, starting from it’s launch date, which was blamed on neglected paintwork. This talk will be re-scheduled for a later date.
However, since in June 2024 we are witnessing the celebration of the 80th anniversary of the D-Day landings, our speaker Paul Barnett thought it more appropriate to present a talk based on his long term research of Severn estuary, river and Gloucester to Sharpness canal war time history. Paul has given us talks before on Gloucestershire’s involvement in the war effort, which has proven difficult to research due to military records not released for decades after the events. Also there were restrictions to prevent war planning being made public at critical times.
Men of service age and fitness were conscripted into military service, except for those in reserved occupations. As a largely agricultural county, this meant that many women joined the Land Girls to work on the farms. Women also filled in the previously male dominated other professions where those men had gone to war. Apart from digging for victory to feed the populace, someone had to keep the home fires burning for combatants to return to after the conflict. Men in reserved occupations joined one of the many Home Guard units. Some units were based at village or district, and even company locations.
Virtually all metals were classified as strategic material for war production.Timber, however, was not a classified strategic material, so was not seen as much of a target for Nazi interest when the bombing started. So import of various timbers from around the world continued at Lydney, where a shadow factory was built at the Pine End Works to process the logs. Mounted between centres, the logs were were turned into clean cylindrical form before being unrolled into thin sheets, from which plywood structures could be fabricated. The DeHavilland Mosquito fighter/bomber was one such aeroplane constructed from plywood. The Horsa troop transport gliders were also fabricated in a similar manner. Gloster Aircraft built nearly 3000 Hurricane fighters during WW2, where most of the fuselages were constructed from timber.
Between 1939 and 1966, the demasted sailing ship Vindicatrix was moored at the Old Dock in Sharpness as a training hulk for the Merchant Navy.
The early WW2, from September 1939 to May 1940 was known as the ‘Phoney War’ because little action by the Nazi’s was seen locally. Children in Gloucestershire were among the one and a half million in Britain to be evacuated from populated or otherwise anticipated bombing target areas to relatively safe rural districts. However, this early inactivity caused many parents to request return of their children, even to relatively ‘safe’ towns as Cheltenham. The county had significant engineering bases to produce aircraft, land and maritime equipment to support the war effort, but the public were not aware how important a role the county was playing at that time.
After the war, Nazi planned invasion routes targeting the county as an important seat of resistance to them, were revealed by German sources. Also, much of the equipment and personnel for the Allies ‘D’ Day invasion was shipped from the Severn estuary and bound for the English channel ports ahead of the action. This was so top secret during the war, that little more than rumours circulated the local population, and decades later, few eye witnesses can be found with genuine information about activities in the war. Mum certainly was the word!
Derek England.