RLWP
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Posts posted by RLWP
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14 hours ago, Philip said:
Is there a 2023 BCN Challenge?
Good question. Probably!
Richard
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Oh, probably. That end can be a mystery because it often has non-standard pulleys fitted. As yours has
The little one looks like it is for a bilge pump, check to see if it has an Allen grub screw somewhere in the side.
As an example of 'customisation', you engine has had the camshaft cut short
Richard
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1 hour ago, Tracy D'arth said:
Thanks Richard, confusing my tapers! Its about 25 years since I played with a ST.
The SABB was a surprise to me!
Richard
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The flywheel will only fit in one location, there's a Woodruff key in the taper. Td'A may be remembering SABB flywheels
The bolt that holds the flywheel on will be incredibly tight, you'll probably find it has been undone and done up with a large hammer and chisel in the past. Although crude, this works in the absence of a large socket. There's also a tab washer
Free the bolt off and unscrew it about a quarter of an inch (6mm). Then put the gearbox shaft back on - you'll find it won't go all the way home because it sits against the head of the bolt. Tighten the three bolts up and eventually there will be a bang and the flywheel will come off the taper
We have new flywheel bolts and tab washers if you want to replace them
Richard
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We scrapped one because of a cracked block - frost damage.
That one looks OK. Nice engine
Richard
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11 hours ago, matty40s said:
How much lock gate oak?
https://iaservices.co.uk/online-sales#!/auctions/b3fc0eb2-bee8-49a5-b82a-90e1ed683cfa?ic=30&page=1
Page 2
Richard
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On 15/10/2022 at 10:01, BEngo said:
A standard three point bore gauge will also measure bore cylindricity.
Technically, it doesn't. It measures straightness, roundness and concentricity. You can infer cylindricity from those figures, not measure it
Richard
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15 hours ago, tommylad said:
Many thanks for this BEngo - I did check and had (and still have) the 2 thou nip stated in the manual. Would be good to have cylindricity checked wouldn't it - although I guess it must be very close anyway else the bearing would've been tight when fitted.
OFF-TOPIC
When working on experimental Stirling engines, we used to get the pistons checked by the metrology department, including cylindricity. They always pointed out, cylindricity is something they couldn't measure.
They can measure straightness, they can measure roundness, they can measure concentricity - but they had no 'cylindricity' measuring tool
Richard
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14 hours ago, tommylad said:
Yes thanks! Lots of lovely engines lying around! I particularly liked the NEW 6 cyl Riley blocks they're machining up!
I've left the big end with them - Martin was very relaxed about the job, apparently the smaller the bearing the harder it is to remetal, so a JP one should be a doddle!
They're impressive, those blocks. I didn't get them to unpack the crankshafts they had in a box
Richard
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On 28/09/2022 at 21:36, tommylad said:
Cheers Richard, I'll give them a try too
Did you enjoy Cov Classics?
Richard
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11 hours ago, tommylad said:
Yes, I think that could be the best option for a more long term solution. When I rebuilt it I was only able to find one NOS big end bearing, which is still fine - but the repro one is really dissapointing. I guess these parts are principally intended for engines which run at the occaisional steam rally, not clocking up proper hours under load in a boat! Coventry boring remetalled my main bearings and although not cheap I was really pleased with the work they did - I'll give them a call.
If that was some time ago, their whitemetalling man has moved to Coventry Classics.
Richard
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Apologies - you are right. I hadn't read the whole thread
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18 hours ago, monkeyhanger said:
Luckily I've managed to purchase a NOS bevel gear. Now I need to make sure I'm doing the right things when fitting it.
Indeed. If it's a Marine JP you are going to have to take the flywheel off, and when you refit the gear housing you must get the fuel pump timing right
Richard
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21 hours ago, monkeyhanger said:
Thanks for that info. That was a page which was not in my manual, although there are no pages missing. Strange!
Not really. There are several versions of the JP manual to trap the unwary. The reprints we sell have the plunger pump added at the back
Wait 'til you try and work out a part number...
Richard
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Last time I dealt with a Fuzhou gearbox on one of the Kingfisher engines it had broken the spindle to the oil pump
Richard
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10 hours ago, Peugeot 106 said:
Richard you've thrown me a bit with this as R&D have come up with different rated mounts front and back. I assume they've applied the 40% front 60% rear rule. Are you saying that this resultant "different resonant frequency" could be beneficial or are you WARNING against it?
I'm warning against my idle, untested speculation.
From the bits of theory I remember the engine is one mass/spring/damper system with the damping coming from mainly from the engine mounts. This system is going to have a (or more likely many) resonant frequency which is determined by all of those. You cannot change the mass, the springing and damping come from the engine mounts
So, in theory, if you've got an engine that's going into resonance at an undesirable cruising speed, you could change the frequency by having different types of mount front and rear
On the other hand - I'm speculating idly and R&D do this for a living. Go with the R&D set up
Richard
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11 hours ago, IanD said:
This means they have the same resonant frequency,
Do they - and is that a good thing? After all, the engine can't wag at different speeds at each end of the block - it's a single solid item
My guess (WARNING) is you end up with a different resonant frequency for the complete engine. And it might be that you completely upset the resonances in the setup to your advantage
I've never done it, I do wonder if different stiffness mounts front and back would be a good thing
Richard
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23 hours ago, Arthur Marshall said:
Bit like everyone says about Listers. They go on for ever and nothing ever goes wrong...
Oooh no - that's not right
Things go wrong, and they still go on running
Without engine mounts
Richard
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1 minute ago, XLD said:
Done all the above. But the quedtion was
Attached to what - a skyhook?
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Kick the pin a couple of times at 90 degrees, then pull it out using the mooring line through the loop
Richard
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We sell them fairly often along with the metal cased lip seals
Richard
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On 01/06/2022 at 09:51, Pluto said:
Perhaps it would be best to go forwards environmentally to horse power, as the grass would be kept down naturally, and rose growers would have something to take home from their boat.
OOh, no. Not horses
Sheep! All we like sheep
Richard
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4 hours ago, tree monkey said:
I can take myself thank you very much
Sure? And where have you been for the last couple of days...
4 hours ago, BlueStringPudding said:Hmm... Monkey and strict instructions to see a doctor, eh...? It's not like he has previous with that. 🤔😶
(If there's a) next time, I'll need to strap him to a sack truck, kicking and screaming, and wheel him there myself 😉
Hannibal Lecter style
I think I've got a large dog cage somewhere, would that be useful?
Richard
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The tub says add hot water
Richard
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BCN Challenge 2023
in General Boating
Posted
Just to say how delighted we are to be handing the organisation of the BCN Challenge to Jon.
Well, he did win it - perhaps we could use that as a precedent. That would shake things up a bit!
Richard