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Articles by Chris Caldwell
Cavitation Causes, Prevention & More
What causes cavitation? Cavitation results from the formation and subsequent collapse of vapor bubbles within the pumped liquid. There are many possible causes, such as low net positive suction head (NPSH) margin, high velocity recirculating currents in the impeller, hot liquid, etc., but all causes result in the pressure on the pumped liquid dropping below the vapor pressure of that liquid, allowing the formation of vapor bubbles. In which environments/applications is cavitation the biggest worry?
I'm a huge fan of this article.
I'm a huge fan of this article. Good coaching managers are rare. And often, their impact is not easy to see when observing their methods in the moment where coaching happens. When people use the non-coaching methods as a proxy for effective coaching, evaluating the longer term impact coaching creates, the measure of value created shifts from the long term outcomes delivered by coaching methods to a shorter term, run of the mill, manager playbooks for performance evaluation.
Strabane man being touted for UK return
Wanted man......Stephen Maguire. Posted: 6:30 pm October 27, 2021 STRABANE man Stephen Maguire is being touted as the favourite to take on the daunting task of rejuvenating UK Athletics’ performance system which has all but fallen apart since his shock departure.
Urney are happy with the tag of undedogs
Johnny Lafferty and Urney take on unbeaten Eskra this weekend. Posted: 9:00 am October 22, 2021 UNBEATEN runs can’t last forever and Urney are hoping Eskra’s will end this coming weekend when the two teams meet in the LCC Group Tyrone Junior Championship semi-final. The Emmetts went through the Division Three league season unbeaten and also won their opening Championship clash against Brocagh to leave them with a fifteen game streak without tasting defeat.
Christie claims bronze at National Championships
Marcus Christie claims bronze Posted: 9:00 am October 7, 2021 MARCUS Christie and Adam Ward brought excellent seasons to an end at the weekend at the National Championships in County Wicklow. Christie, who broke the Irish 25 mile TT record earlier in the year to earn a spot at the World Road Championships, claimed bronze in the time trial on Thursday, finishing one minute and 11 seconds down on winner, Ryan Mullen, with runner-up, Nicolas Roche 16 seconds adrift.
Jamie aiming to go 'potty' in Portugal
Local snooker ace Jamie Gardiner. DR71 Posted: 9:59 am September 30, 2021 JAMIE Gardiner travels to Portugal today (Thursday) intent on making his mark at the European Snooker Championships. The Dunamanagh man will compete in both the under-18 and under-21 events and he is hopeful that he can mount a serious title challenge in at least one of them.
Ward’s delighted to finish gruelling road race
JUST finishing the European Road Championship’s under-23 men’s road race was a challenge in itself and Dunamanagh’s Adam Ward is delighted to have managed just that.
Bready rider continues winning streak
Marcus Christie continues impressive form Posted: 2:41 pm September 9, 2021 MARCUS Christie continued his superb run of summer form at the weekend when he won the Thomas White Memorial 10-mile TT in County Down on Sunday. The Bready man set a new Irish record over 25 miles earlier in the summer and just two weeks ago he won the Champion of Champions TT over the same distance, breaking the course record in Newtownards, with a time of 49:25 minutes.
Strabane strongwoman powers to novice victory
Strabane's Nicole McMillan in action during her first ever Strongwoman competition. Posted: 3:40 pm August 19, 2021 NICOLE McMillan surprised herself during her first every strongwoman competition recently. The Strabane woman entered the Total Strength Ireland novice open weight event in a bid to dip her toe into the waters of the sport, but she never expected it to go quite as well as it did. Not only did she win the event, she also set personal bests in every event.
Irish title hat-trick for Strabane’s Mark Burke
Mark Burke, right. Posted: 7:47 pm July 30, 2021 MARK Burke was delighted to return to competition at the weekend when he claimed a third Irish title in the sport of strongman. The Strabane man claimed the Irish under-95kg crown in Kilkenny on Sunday when he was also third in the Ulster standings in the open weight category.
Christie smashes Ulster 25-mile TT record
Record breaker Marcus Christie Posted: 9:55 am July 23, 2021 WHEN Marcus Christie feels he has a point to prove there aren’t may time-trialers in the country that can keep pace with the Bready man. And that was the case on Sunday afternoon when the 30 year-old left the rest of the field in his wake to win the Ulster 25 mile TT title on the Woodgreen circuit in Ballymena and break David McCann’s 13 year-old National record in the process.
Tyrone cueists meet 35 years after first locking horns
Patrick Wallace and Dermot McGlinchey meet in NI Championship Posted: 8:06 pm July 17, 2021 THIRTY-FIVE years after their first meeting as a couple of fresh-faced youngsters, two Tyrone snooker legends will again lock horns in the latter stages of the Northern Ireland Championships. This weekend, close friends and long-term rivals on the green baize, Dungannon’s Patrick Wallace and Castlederg’s Dermot McGlinchey will face-off for a place in the last four at Antrim Sports Club.
Dunamanagh teenager edged out in final
Dunamanagh teenager Jamie Gardiner, right, pictured with opponent Chris Clifford ahead of NI U21 final Posted: 5:50 pm July 4, 2021 DUNAMANAGH’S Jamie Gardiner suffered an agonising 5-4 defeat to Christopher Clifford in the Northern Ireland Under-21 Snooker Championship final on Monday night.
Roes skipper Devine prepared for Moortown
OWEN Roes appear to be the embodiment of the competitive nature of division two. It’s a section in which anyone can beat anyone else, and they invariably do, as the Roes have proved by beating Clogher and Aghyaran either side of a somewhat self-inflicted defeat to Rock.
Sprint Academy coming to Strabane
Trevor McGlynn giving instruction at the Sprint Academy in Omagh Posted: 8:45 am June 14, 2021 SPRINT Academy Ireland held the first of its group sessions for underage sports people at Youth Sport Omagh, with further sessions planned for Strabane, when over 30 youngsters attended.
Perry in confident mood ahead of Draper clash
Denis Perry is in confident mood. Posted: 8:58 am June 4, 2021 DENIS Perry believes he will claim a ‘dominant win’ over Brian Draper at Clan Wars 40 this coming weekend in Belfast. The pair were to do battle in March but with the latest lockdown restrictions coming into effect that month, the bout was put back until late May. That has now become early June and despite the lack of certainty surrounding when he would get to take on the young Dubliner, Perry has been fully focused on his preparations.
Sigersons boss confident his team will be 'competitive'
James O'Reilly, left, is confident his team will be competitive. Posted: 8:49 am May 28, 2021 SIGERSONS joint manager, James O’Reilly is confident his side will be ‘competitive’ during the 2021 Tyrone ACL Division Two season.
Magee named Coach of the Year
Daniel Magee received the Badminton Europe Coach of the Year Award for 2020 at last week's European Championships in Ukraine. Photo: Badminton Europe Posted: 9:08 am May 14, 2021 DANIEL Magee was delighted to be named Badminton Europe’s coach of the year at the European Championships in Ukraine. The Raphoe native was rewarded for the success achieved by Ireland’s badminton players during 2019, which saw his siblings, Chloe and Sam, and Nat Nguyen excel on the international stage.
Torrens crowned jockey champion
Simon Torrens won top Conditional jockey award Posted: 8:47 am May 7, 2021 THIRTY-FOUR wins, 25 second places, 32 thirds and 42 fourth placed finishes that earned over half a million in prizemoney during the 2020/21 National Hunt season have ensured that Simon Torrens was crowned Conditional Champion jockey in Ireland.
Skipper disappointed there will be no pro at Foxies
Fox Lodge skipper Aaron Heywood recently pictured receiving sponsorship from Greg Mitchell, of Greg Miutchell Motors. Posted: 10:20 am May 6, 2021 FOX Lodge skipper Aaron Heywood is disappointed that professional Cebo Tshiki isn’t now returning to Ballymagorry for a third spell, but he hopes that will present opportunities for younger players to shine in the first team.
Four seconds of heartache for McGlynn
Ann Marie McGlynn missed out of Olympic qualifying time Posted: 11:02 am April 29, 2021 FOUR seconds. Count them. One, two, three, four. That didn’t take long, did it? It’s an almost imperceptible length of time, but for Ann-Marie McGlynn it might as well be a minute, an hour, or forever for that matter.
Strabane rugby players' delight at return to training
Strabane rugby players returned to training Posted: 1:42 pm April 26, 2021 SAYING Strabane Rugby Club’s players were delighted to return to training last week would appear to be an oxymoron, but after missing the guts of a year because of the Covid-19 pandemic, they really were. For the next six weeks or so, players will meet once per week at the Meadows for some touch rugby games as they attempt to reintroduce themselves the sport following a lengthy lay-off.
Talented Ashleigh scoops top award
Ashleigh McArdle scoops top award Posted: 3:15 pm April 15, 2021 ATHLETICS events may have been at a premium during 2020, but that didn’t stop Ashleigh McArdle from collecting an impressive 13 medals last season. The 13-year-old Ballymagorry girl won an All-Ireland silver medal, eight golds and a silver in the Ulster Championships and two golds and a silver at the Donegal County Championships.
Magee and Reynolds impress in France
Josh Magee, front, and Paul Reynolds. Photo: Badminton Photo Posted: 7:30 pm April 3, 2021 JOSH Magee and Paul Reynolds made an impressive start to tournament play in 2021 at the Orleans Masters BWF Tour 100 event in France last week. Raphoe man, Magee, and his playing partner Reynolds reached the quarter-finals of the prestigious event before the latter’s back injury forced them to withdraw from their last-eight clash with fourth seeds, England’s Sean Vendy and Alex Lande after the opening game.
Porterfield ‘excited’ by new roles
William Porterfield Photo: INPHO/Oisin Keniry Posted: 7:24 pm April 2, 2021 FORMER Ireland captain, William Porterfield has been appointed as assistant coach for the North West Warriors, which he will combine with his playing role. He will work alongside new head coach Gary Wilson, alongside whom he has also been appointed by Cricket Ireland in a coaching consultancy role within the national set-up. Porterfield has been appointed as a Consultant Fielding Coach for Ireland.
Sion open campaign against Big Two
Maddy Harvey-Clifford and Erin McLaughlin clash in the box. DR09 Posted: 6:38 pm March 28, 2021 SION Swifts Ladies couldn’t have asked for a more difficult start to the 2021 season having been handed fixtures against Belfast’s Big Two in the opening two weeks. Tony McGinley’s team will kick off the new season at Linfield on April 28 before hosting last year’s champions Glentoran on May 5.
Curry’s looking forward to getting a tune out of Harps kids
Posted: 6:41 pm March 26, 2021 EAMON Curry is looking forward to guiding the next generation of Finn Harps first team players on their way through the ranks after taking on the under-15 head coach role at the County Donegal club’s Academy. The Strabane man is hoping to develop players who will not only filter through the under-17s, into Tommy Cannings under-19s and into the first team, as well as finding those who can make a career in England or Scotland.
Aidan’s targeting a second Games in a second sport
WHEN Aidan McGlynn hauled himself out of the pool following the first round of the 50 metres freestyle at the Athens Paralympics in 2004, he would have been forgiven for thinking his time as an Olympian was over. He was only 22 years of age, but after finishing in 29.15 seconds, which was around two seconds slower than his qualifying time, he was dejected and lost the support of the Sports Council after failing to hit his pre-event target.
Tyrone GAA star joins in call over underage games
SPORTING stars from Tyrone have added their names to a letter highlighting the frustration within clubs and communities that team sports at underage level are currently banned by Stormont due to the coronavirus restrictions.
Torrens reflects on stunning double at Dublin Festival
Double delight for Simon Torrens at Dublin Festival. Posted: 5:58 pm February 12, 2021 SIMON Torrens enjoyed the best win of his career so far on Saturday at the Dublin Racing Festival and then a short time later he surpassed that to complete a remarkable double on the saddle.
Dennett Anglers deliver wide range of activities
Fishing instructor Damien Devine pictured at the Ballyheather Trout Farm with Amanda Boyd, Conor Hassa, Caroline Hassan, Stacey Sloan and Jackie Sloan. DR13 Posted: 1:22 pm February 7, 2021 The Dennett Anglers Association over the winter months continued to deliver outdoor activities for participants from the Dennett Valley area.
30 years on McColgan reflects on the highs and lows
Peter McColgan leading from the front Posted: 9:15 am January 30, 2021 STRABANE native Peter McColgan spends much of his spare time on the links of Carnoustie these days, but 30 years ago he was at the peak of his powers on the track, at the start of what should have been several more years at the top. Unfortunately for the now 57-year-old, his appearance at the 1991World Athletics Championships in Japan proved to be the beginning of the end of his racing career.
Trev got back on ‘track’ after Olympic dreams shattered
Trevor and Ann Marie McGlynn. JB23 Posted: 5:21 pm January 25, 2021 February 1997 was a month Trevor McGlynn will never forget. The then 18-year-old won the Scottish under-20, Irish under-20, Irish Senior and British under-20 indoor 60 metre hurdles titles – one per weekend – during that winter month 24 years ago.
S&C coach Brady is upbeat about new challenge with Tyrone Seniors
Tyrone ladies will be put through their paces by new S&C coach Mattie Brady. Posted: 7:05 pm January 24, 2021 THERE was no hesitation from Ardboe native Mattie Brady when new Tyrone Senior ladies manager Kevin McCrystal asked him to join his set up at the end of last year. With a glowing reputation as a top Strength and Conditioning coach, taking on the new role was something that excited Brady “ I see it as a fresh challenge,” explained the 31 year old.
U-20 boss Devlin encouraged by the call-ups to senior panel
Posted: 7:25 pm January 22, 2021 TYRONE Under-20 manager Paul Devlin was reappointed on a new three-year term last week, and he says the influx of young players into the senior panel has been a source of encouragement to him.
Bready’s Conor flies out to join Ireland squad
Conor Olphert. Posted: 6:57 pm January 16, 2021 BREADY pace bowler, Conor Olphert was added to the Ireland men’s squad ahead of the concluding ODI series fixtures with the UAE in Abu Dhabi. The 24-year-old and all-rounder, Shane Getkate were drafted in to provide cover for both the squad’s batting and bowling stocks after David Delany suffered an injury.
Last ditch effort made to save Shamrocks
Chairman Gary McGettigan and secretary Andy Kelly are hoping that the gates won’t close on the Shamrocks hurling club. DR46 Posted: 6:59 pm January 15, 2021 A LAST ditch attempt is being made to secure the survival of the Strabane Shamrocks hurling club which has been keeping actively promoting the sport from its north Tyrone base for the past four decades.
Tyrone hurlers fuming
Posted: 7:04 pm January 14, 2021 TWO of Tyrone’s leading hurlers have hit out at the delay in appointing a new manager, which has caused considerable ill-feeling among the hurling fraternity in the county. Team captain Chris Kearns has said he would seriously consider whether it’s all worth it if Mattie Lennon isn’t reinstalled as their senior intercounty manager – while their star forward Damian Casey is concerned that the ship has already sailed and the damage is done.
Senior and Minor county managers concerned at lack of fixture clarity
Kevin Mc Crystal, the newly appointed Tyrone Senior Ladies Football Manager.Jmac-01 Posted: 7:54 pm January 12, 2021 TYRONE’S new ladies manager Kevin McCrystal and officials from the county remain in the dark over the start of the season for their senior and minor inter county squads. A ladies management meeting prior to Christmas confirmed a reduced league programme, with a January 15th start, however the counties remain in the dark.
Gemma leads push for Equality
Posted: 7:51 pm January 11, 2021 Former Tyrone star Gemma Begley believes that everyone involved in Gaelic Games can do their part in pushing for equality – whether the GAA, LGFA and Camogie Associations remain separate organisations or not.
From Prehen Playing Fields to Wigan Athletic - the Noel Ward story
IF you presented Noel Ward’s soccer career in script form to a Holywood producer, they would probably laugh you out of their office. The Dunamanagh native was plucked from obscurity to play for Derry City before moving to Portadown, then on to Aberdeen and then Wigan Athletic where he seemed destined for the top.
Bradley is keen to get started
Killyclogher captain, Mark Bradley, with the Division 1 trophy. JB22 Posted: 7:44 pm January 8, 2021 Fingers crossed the new Inter County season will begin at the end of next month and Tyrone star Mark Bradley for one can’t wait to get started under the new management team of Feargal Logan and Brian Dooher.
Tyrone skipper Sean relieved to chisel out narrow away victory
Tyrone captain Sean O'Donnell in action against Cian McMonagle, Donegal. Posted: 10:00 am December 28, 2020 THE heavy underfoot conditions in Pairc MacCumhaill Ballybofey on meant that the Ulster Minor Championship quarter-final between Tyrone and Donegal was never going to be a classic but that won’t unduly worry the visitors who came out on the right side of a low scoring affair.
Tyrone sides hoping for games
Posted: 7:20 pm December 24, 2020 THE Ulster Schools’ committee has, after consultation with the 32 schools who entered the 2020/21 Schools’ Cup, outlined their proposed formats for the competitions next year. It has been agreed that the 32 schools who entered the Danske Bank Schools’ Cup will now compete in four separate competitions of eight teams – the Schools’ Cup, Schools’ Subsidiary Shield, Schools’ Bowl and Schools’ Trophy.
Regional look to NFL
Tyrone's Cathal McShane rises above Donegal's Eoghan Gallagher. MC 33 Posted: 7:07 pm December 23, 2020 TYRONE are set to face a regional National League campaign against Ulster rivals Armagh, Donegal and Monaghan after the 2021 GAA template was revealed. While some details are still to be confirmed, counties have been gathering information on what their new season will look like – and it will be county teams who are first up to bat.
Canavan’s class proves the difference for Tyrone
Oran McGrath, Tyrone looks for options against Donegal. Posted: 7:06 pm December 22, 2020 Donegal 0-07 Tyrone 0-08 Ruairi Canavan proved to be the difference between the sides as Tyrone downed Donegal by a point in the Minor Championship in MacCumhaill Park on Sunday. Collie Holmes’s team only had three weeks of collective training to get ready for the match and they found themselves in a tough attritional battle where every ball was fought for.
McBrine’s targeting January victories over Afghanistan
Posted: 2:11 pm December 22, 2020 ANDY McBrine knows that January’s three-match series against Afghanistan could be crucial if Ireland are to qualify for the next World Cup. The Donemana man was named in Ireland’s 16-man squad to face UAE and Afghanistan in back-to-back series’ early next year and it’s the latter of those he is particularly focused upon. This will be Ireland men’s first international action since their dramatic run-chase victory over World Champions England back in early August.
Denis proves he’s not to be counted out just yet
Denis Perry, left, and Garath Vaughan. Posted: 7:08 pm December 21, 2020 HE had two title belts in two different weight divisions and he won a World Championship bronze medal in Las Vegas but at the age of 25, Denis Perry stepped away from the MMA world. Initially, it was to be a brief break but as next year became the year after and then the year after that, it looked as though one of Ireland’s brightest prospects in the sport has been lost.
Red Hands young guns seeking an early Christmas present
Daniel Gildea, Donegal gets the pass away for Donegal against Tom Grimes, Tyrone. Photo: Donna El Assaad Posted: 7:50 am December 20, 2020 THE Tyrone U17s will finally get their chance to fulfil their Ulster Championship quarter-final when they take on Donegal this afternoon, and coach Conall Lavery says his overriding feeling is one of relief for the players.
Boyd frustrated by lack of action as ‘Straw bow out
Calvin Mc Kinley and Ryan Deighan contest the ball during the NI challenge ciup game at Vaughen’s Holm. DR62 Posted: 12:02 pm December 19, 2020 DESPITE his team getting a first taste of competitive action this season, Ardstraw boss Nigel Boyd admits he remains frustrated. Ardstraw opened the season with a 3-1 extra-time defeat to Dungiven in the quarter-final of the NI Challenge Cup and that means that his team won’t play again until the new year.
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