The Facebook Marketplace Merlin Engine. Ep2. Building Up The Crank Assembly...
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- Опубліковано 16 лис 2024
- In this second instalment I assemble the crankshaft and connecting rods for this Rolls-Royce Merlin XX, built at Glasgow in 1942 and once fitted to a Handley Page Halifax heavy bomber which crashed in Germany.
My aunt did quality control checks on Merlin engine crank shafts more than possible she checked that one.
As someone who currently works for RR at Derby building modern Civil Jet engines (Trent 1000 & XWB) these videos are fascinating to watch....love a Merlin ❤
I find these videos very informative. There’s not a huge amount of information on the Merlin across UA-cam so it’s nice to watch your videos.
I'd paused the last video to examine the beautiful crank and rods. How the fork roads were made is stunning.
Yes ! On my tablet you can also zoom in for even more detail.
Lovely to see this stage by stage, thank you Peter!
Enjoying this stage by stage build up. Looking forward to the next episode
I've built many auto engines and have been amazed by these Merlins..Thank you for explaining the con rod bolt strech..simple enough. Amazing that they had this kind of reliabilty in the 40's. Those con rods look like art so nice and polished!
A well presented series on this iconic engine is in my 'looking forward to a new video' tag. Thanks Peter.
Wow, great content! Not staggering the cylinder blocks sure kicked off a lot of complexity with the connecting rods!
Thanks Peter for sharing your knowledge on this amazing engine.
It is a pleasure to me looking at your videos.
Very interesting to see the design of this engine and the engineering behind it, very skilled engineers back in the day.
Nicolas
Enjoying these videos, very interesting. Even the bits of the merlin you don't usually see are a piece of artwork 👍
Nice to see how these amazing engines go together .
I have built WW2 V12 German Panther/Tiger tank engines (HL230). They use the same type of knife and fork con rods which are also machined all over. The main bearings are very large needle roller bearings that are oil splash fed .
Thanks Peter, really fascinating. What exceptional craftsmanship went into the making of all the parts. I was under the impression that the Halifax bomber had radial engines? I look forward to more videos.
I find these videos fascinating, I could watch videos of this rebuild in real time (I'm not complaining about the editing)
I used to build Perkins V12 diesels, the Challenger tank engine had head studs but the generator version was fitted with bolts..
I can’t remember what torque settings but each one finished with a 90 degrees turn to stretch it.. That was done with a
breaker bar and was hard work !
Lovely to see the engineering on the Merlin thanks 🙏
Thanks! The CV12 is a great engine. It can make the same power as most Merlins with about 1 litre less displacement. Nearly 3 times heavier though!
This video came up on my feed, I had to go back and find the previous video first to get the background on the engine.
It's really good to watch your technique and hear your explanation.
Not being familiar with "stretch bolts" (I'm an electrical & software engineer), it's interesting to learn about their characteristics. Knowing they twist a little more with each re-tightening, imagining the grain of the forged bolt is a little unsettling (if I were flying behind one).
awesome stuff, that assembly looks insane compared regular car engine
When I saw the shells I thought they were worn out. But as you say they are not white metalled.
Nice informative video Peter.
Brilliant stuff, thank you
Good stuff! I learned a lot, thank you.
Damn..... no wonder it took so long to build a merlin!!!
Yep. 11,000 parts and it takes around 1300 hours to do a full rebuild to flight.
BLODY LUVLEY MATE I CAN'T REMEMBER IF I'VE EVER ACTUALLY SEEN THIS ASSEMBLY PROCESS PRIOR IN MY LIFE @70 THERE'S LOT'S I'VE LOST SO IT'S STILL A TREAT TO WATCH THIS AND THE AMAZING CRAFTSMANSHIP THAT WENT INTO THESE ☝️OR ANY EARLY AIRCRAFT MOTOR FROM THE EARLY YEARS MY GOD THE TOLERANCES HOW IN HELL DID THEY
ACHIEVE SUCH PERCISION TGE PATIENCE AND DEDICATION TO THEIR CRAFT IS NO LESS COMMENDABLE
What a wonderful video
thanks nicely paced with explanatio s along the way
I love the detail in your videos, keep up the good work.
very cool
Top work sir!
I happen to own the exact same torque wrench as you're using. Ipicked it up cheap at the Kempton Park swap meet about 15 years ago.
Fella who sold it to me said it is from aviation industry.
would you mind sharing some info on it please?
Is it the same tool they used at RR when they made Merlins??
That Engine is such a BEAUTYFULL piece of proper engineering!!
They don't make 'em like that any more, right!! I thank you!!
Just found your channel outstanding work love it I will be binge watching 👍
Thanks Peter.
I thought you measured the amount of stretch with a special micrometer that has pointed ends and fits into the bolt ends.
You can do that, yes. That is how the Packard Merlin manual tells you to do it, but Rolls-Royce stayed with this method all the way through production.
I was surprised that where the slot in a nut is just past the pin hole, you tightened the nut even further, instead of packing the nut such a small amount.
Is the crank one solid forging or casting? or is it made up in segments and pressed together like some motor bike cranks were? reason i ask is the crank webs look like the journals come all the way through them and look like a different material to the crank web. (as if the journals were pushed in to the webs)
It`s a one-piece forging with hollow journals, so what you can see are just oil sealing caps.
I like using old tools, but have you had that torque wrench checked for calibration? Ive had old ones off by 20 pounds. And im talking snap on ones from the 1950s and that one looks older.
Excellent
When did they change this design con-rods? Other merlins I've seen have a different split con-rod design.
Top piston ring? When checking the taper on the top piston rings by putting two rings edge to edge against each other I found that the top mark did not correspond to the manual orientation diagram of the taper. This should have been reported up the line so wondered if you had come across this?
On an engine like that you should use all new bolts
Who's the crankshaft end machines ? I have so many questions but I don't know anything about that engine...
I have a Cromwell converted merlin in pieces looking for a new home
Where are the bearings ?
You should mention how the main bearings are in-line bored and the use of plasi gauge. No off the shelf ready to go bearings for these. I know the horrible bedstead like engine stand you are talking about. We also had a lot better one that wrapped around the block giving a lot lot better access.
Ain’t they meteor engine parts ?
Merlin Mk XX
The torque wrench spring is probably so old and inaccurate
I sent you a email not sure if you got it
You did, and I forgot to reply...sorted now!
@@FlightEngineering1 No worries I know your a busy chap!
U should flex gauge to check clearance
It`s not common practice on these. They have larger clearances than a modern engine and the journals and bearings are measured.
If you measure the crank journal and the bearing there is no need to plastic gauge.
Not criticizing but it doesn't look like you too sure of yourself