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Post by baz62 on Nov 8, 2012 21:02:01 GMT 12
Thats in the Halswell Domain Al? I'll give you a shout when I have the Bristol nameplate ready. (yeah only been a year or so in the making..... :
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Post by beagle on Nov 8, 2012 21:10:13 GMT 12
Forum Meet ?
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Post by martytheduck on Nov 8, 2012 22:20:12 GMT 12
Oil filter CPT Right Engine Attachments:
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Post by martytheduck on Nov 8, 2012 22:20:47 GMT 12
Oil filter CPT Right Engine Attachments:
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Post by martytheduck on Nov 8, 2012 22:21:20 GMT 12
Oil filter CPT Right Engine Attachments:
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Post by martytheduck on Nov 8, 2012 22:21:47 GMT 12
Oil filter CPT Right Engine Attachments:
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Post by martytheduck on Nov 8, 2012 22:22:07 GMT 12
Oil filter CPT Right Engine Attachments:
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Post by johnnyfalcon on Nov 10, 2012 13:47:48 GMT 12
Oh dear....
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Post by dazz on Nov 10, 2012 14:02:03 GMT 12
Mmmm, that's not good! Having sat for a long time perhaps it's to be expected? I wonder if she was ' making metal' with SafeAir before they parked it?
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Post by baz62 on Nov 10, 2012 16:12:31 GMT 12
I don't think she was making metal after Al got that one running again but if you look back in the resurrection story this engine did have oil pressure issues for a while. And I think this was the one where the oil pump casing was sludge after water ingress. Have to wait till Al can dive into her innards and have a look.
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802gwr
Warrant Officer
Posts: 30
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Post by 802gwr on Nov 16, 2012 12:18:45 GMT 12
The sump scavenge filter collects the big bit ! Have a look at the Purolator filter there is a good chance it's full of fine metal. The Purolater filter is located on the left side of the lower supercharger casing. Good luck!
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Post by suthg on Nov 20, 2012 19:12:23 GMT 12
It looks like a main bearing has shed a layer of white metal... very sad.
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Post by krashguard on Nov 26, 2012 8:30:55 GMT 12
Al, Greetings from Nanton, Alberta and our Bomber Command Museum of Canada. I am the slightly off-center "bloodhound" who went looking for any Bristol Hercules engine hand tools to help with the 2 Hercules engines and 1/2 a Hastings we found in a scrapyard in Malta and shipped back to our museum in 2010 -2011. I knew that Hawkair had Bristol Freighters and had sold them but maybe they had some tools left to help with these 2 Hercs we had?. Lo and behold we ended up with all 4 engines and the spares left (after Sept. 2011) that were stored at the Hawkair Terrace, B.C.base. Thanks to our new friends at Hawkair, including Paul Hawkins who has been of great support, we now have the a not-small collection of Hercules engines and the extra heads, cylinders, and a bunch of cool (do you think you will ever use that stuff - yes, but I am waiting for that time to appear in the future) things. Our Hercules team here at the BCMC has discovered the great work (Larry and you) have done and if I said the phrase "If you build it, they will come" I think you follow me on the compliment of what a good idea you had and excellent effort you have made. Our Hercules team here in Nanton is trying to walk in your guys shoes as we have got our first Herc turning over after prelube (it is a Herc 734 with less than 10 hours on it since a major at 1500 hours half- life) and last week we got spark from the mags. Found one broken ring on a cylinder head, replaced same, and now all the heads are going back on next Tues night (our team is 4 die-hards Herc "virgins" who are on a fast learning curve - except we don't get paid for our physical efforts). Bottom line is we appreciate what you and your Hercules supporters are doing and we would like to brainstorm with your guys and hopefully we could share info and KIWI shortcuts, avoiding British "technology" breakthroughs that take a long time to solve, and we could help out with sharing/horsetrading on some Bristol goodies. You need to ask me the questions and I can give answers on mutual assistance, although this would be between blizzards and sneak Indian attacks, which pop up here in cowboy country, while you are having sunshine down there. Cheers, Karl Kjarsgaard, BCMC and Halifax 57 Rescue (Canada)
How old am I? I am so old that when I flew in the bush for Wardair in 1972-1974 out of Yellowknife, I got checked out in a Bristol 170 CF-WAB (about 50 hours!) then the airlines hired me, so adios to that era for me.
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Post by Radialicious on Nov 28, 2012 23:02:50 GMT 12
Hi Karl - very nice to hear from you guys. Dave forwarded me your message today. It's great that you are in the process of putting life back into another Hercules. I'm sure that everyone here would love to follow your progress on that project and those of us that can help, surely will. This forum is great for discussing plans and drawing from the experience of others. Getting a Hercules turning over by hand is a great achievement alone! The fact that you have a spark means that you mastered the puzzle that is the Bristol/Rotax low tension booster circuit. Well done! I should contact the team at the Queensland Air Museum in Caloundra to see how their Hercules project is progressing too. We are currently pondering the fate of the starboard engine on ZK-CPT. The metal that has found its way into the scavenge filter is ferrous in that it was attracted to the magnetic plugs in the filter body. That tends to rule out white metal type bearing surfaces and sleeves. The crankshaft in the Hercules is supported on large roller bearings and from what I have seen of the sleeves, they aren't very magnetic. I tend to agree with Dazz in that they were in open air storage, unpreserved internally and this engine was possibly making metal at the end of its service life. The engines fitted to ZK-CPT aren't the engines she was delivered to Omaka with. Those serviceable units were removed and sold along with many others at the end of the Bristol fleet flying days. The port engine was officially serviceable but with only a handful of hours remaining. Nothing is known of the history of the starboard unit. The engines that are in place today were sourced, fitted and run briefly before being inhibited in the late '80s/early '90s. Inhibiting is a process of applying preservative to internal surfaces and components to prevent corrosion and decay. Often this is achieved with greases and oils that are known to 'stick around'. However these compounds aren't usually intended to protect things indefinitely. When I worked on Cessna Golden Eagles with the RNZAF, we had a programme that maintained the inhibiting on our spare GTSIO-520's. At set calendar intervals, the storage plugs were removed from each cylinder, the prop shafts were rotated and the inhibiting oil reapplied. A series of notes were left around the engine to warn people not to turn the prop shaft. Obviously any movement internally would remove the oil coating and immediately provide a home for corrosion to take hold. ZK-CPT was inhibited once and the engines importantly, were never immobilised. It is interesting to watch people when they visit CPT as many of them try to see if they can move the propellers. The reduction gear in the Hercules engine actually assists in the destruction of the inhibiting film if the prop is moved. Its .444:1 ratio means that for every degree of rotation of the prop, the engine turns more than twice that amount. An innocent tug on a prop blade could move each piston several inches in its cylinder. In the early days of the reactivation project, our intention was to re-inhibit the engines and immobilise them. I built a pair of aluminium channels that picked up on the spinner attach screws and on screws on the inner surface of the nose cowl. These channels would remove the ability for visitors to move the prop. In the end, we decided to keep running the engines periodically instead. With the knowledge that the starboard engine had small amounts of metal in her scavenge filter, the filter would be pulled before each run to monitor things. As we know, the starboard engine suffered from day one with corrosion problems internally probably due to twenty years of outdoor storage with no cover on the oil tank filler cap. I suspect water entered the oil tank and found its way into the oil system. This was quite clearly the case when I removed the oil pump to investigate the oil pressure problem in the early days. If the engine was as ill as I think it may have been internally, she did quite well to behave as well as she did over the three years that she was active for. As people have said, it is a shame that she is suffering but I also think that it is great that she was able to wake up and get rowdy for all of us enthusiasts around the world. To put the preservation of both engines on CPT in context with my own Hercules engine; - they were inhibited once twenty something years ago, - the inhibiting wasn't able to be maintained, - movement of the props probably destroyed the inhibiting anyway a long time ago, - they were stored in the open, BUT after very little attention, they were both able to be started and run again. Beautifully My Hercules; - was stored indoors since retirement other than a brief few days at the Renwick dump, - no propeller reduction gearbox was fitted and thus no means of turning the crankshaft, AND needed to be surgically disassembled due to being rusted solid in 12 of 14 cylinders. From there she needed complete replacement of the 14 sleeves and one cylinder before she could be reassembled with a view to a running restoration. When those facts are considered, I really take my hat off to ZK-CPT for even being remotely interested in being awoken. Her storage and preservation conditions should have made such a project all too hard. So yeah it is a shame that for the moment, we aren't running the starboard engine. I would like one day to find the source of the metal and do something about it. It is nice to be able to run both engines for visitors to the Omaka AHC. That also gives us the ability to taxi CPT at the Classic Fighters airshow. A long term plan is to try and find a replacement engine and prepare it for use in a hangar/workshop prior to fitting to the aircraft. It's not impossible to work on those engines in situ but is certainly not easy. With two healthy engines, CPT would be able to be run more often. I have my fingers crossed that we can come up with a fix. I'm sure though that if there is anywhere in NZ with the ways and means of making it happen, Omaka is it. There is still a lot of love for that old aircraft up there and much experience and know-how still around for a successful outcome.
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Post by steveh on Dec 30, 2012 14:16:06 GMT 12
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Post by TS on Mar 27, 2013 13:35:06 GMT 12
Not CPT but some good old film of Safe Air in 1968.
It starts at 3.06 secs.
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Post by ZacYates on Apr 13, 2015 16:44:29 GMT 12
I'm hoping this thread bump is welcomed, after enjoying Al, Marty and CPT in action again at Omaka last weekend I got hit with Bristol fever once more and am about to embark on a model kit build of her.
I've just finished reading through this thread since the start - Al, my remarks a few years back on a Bristol resurrection book based on this thread/diary still stand! - and it hit me that next year is the 30th anniversary of CPT's delivery to Omaka. Dare I ask what plans are in place to mark this? Perhaps a re-enactment of sorts? I'd be keen to make the trip down.
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Post by ianmcgoo22 on Jun 7, 2018 15:17:23 GMT 12
Hello from Canada! I was looking at YouTube tonight and quite by accident found a video of Capt. Marshall taxiing the Bristol around at your big Easter airshow in 2017. I'm glad to see she's still able to run. I followed this thread faithfully when it was current, and I thought the aircraft must have been parked again when the thread went dormant a few years ago. Can we have an update on what's happened to the Bristol in he meantime, please?
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Post by baz62 on Jun 7, 2018 16:35:24 GMT 12
Well Al had to take the starboard engine out and put the one he had trailer mounted in it's place. There was metal in the filters and whilst trying to diagnose the culprit found the master rod had a crack in it........so that was that. Al will probably be along shortly with a bit more detail but I think he's going to look at resurrecting another engine so he can get his engine back. Over to you Captain Marshall.
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Post by joey05 on Jun 7, 2018 18:05:40 GMT 12
Notice her having a "bath" outside the Sounds Air hangar on Tuesday!
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