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I always wondered why the Merlin (and other aviation V-12s) used complicated split connecting rods; rather than staggering the cylinder banks like modern automotive V8s, and using identical rods. length should not be an issue as it would add less than an inch to total engine block length.

TH-cam at its best. Really inspiring to do and make good work. Was the three-gear wheel made on a shaper?

The freedom machine is alive and making music 🎶 I like to thank all the veterans who flew and worked on planes in the war. Freedom does not come. CHEAP. Thank you for keeping history alive.

That Merlin sounded lovely.

Really enjoyed the inset video of the controls. Bravo to Reg for the steadicam work - that can't have been easy at all!

Well done! That R3350 purrs like a kitten now!

What a treat to see how the magic is made in this legendary engine. As someone who is fascinated by all things mechanical, you are living my dream! Thanks for posting.

So it really does spit fire.

Guy has his own Merlin on a trailer, any idea why he didn't use his own?

It is undoubtedly the most iconic piston engine, particularly of its time, but as an indentured British engineer, I would like to add in no2 position,…..the Jaguar XK engine! The first saved all our freedoms and the second enriched those freedoms! They both sound superb and really both look the part from an engineering stance too! Wonderful concepts and brilliantly executed design and manufacturing to boot! Thanks to all those excellent people involved in those pre computer times! Cheers

Real Spitfires are probabpy rare and expensive, but wouldn't it be awesome if replicas were available, and reasonably approachable, so this engine can be mounted on it, if only for the purpose of being a stand...

This is the HARDEST run of the Merlin I've ever seen! Amazing power and sound!

An absolutely superb weekend; glorious weather for a change, Thank you Gentlemen for your professional display 👍🏻😄🇬🇧

What are the six circles with four holes each for in the impeller casing?

Could the damaged diffuser vanes be removed and replacement ones be pinned and epoxied in place?

Прекрасно! Поршневая авиация завораживает!

When you start to think about the engineering involved with these engines, the context in which they were designed and built, and the people who made them, I feel hugely grateful to you and your peers for keeping these engines running for us all to witness and enjoy. Thank you!

The Historic Aero Engine Orchestra of Great Britain !

No fancy AI editing, just great content :)

Every material on the topic of Merlin guts is great! Show us more! Cat't imagine why your voice sound so sad...

Great series

Noob question: Why does the wheel case need to be fastened with so many bolts?

These comments are so British

I assume the trailer is carefully weighted, or secured. At 500 hp, it might be producing about 1000 lbs of thrust, but I suppose that's not sufficient to start raising the nose of the trailer.

Awesome job. Great series.

A very instructive video. I wonder if the damaged stator (7:31) vanes can be welded "back". This process has to be done to a 200 degree C. heated stator housing using the right aluminum alloy. Afterwards, time consuming grinding and polishing brings the part back very close to the original state. One Merlin saved. Once I let a damaged engine backplate (magneto holder) of my aircraft be restored that way. That was NOT expensive. The welder must be an expert though. It could be usefull to mount the intake elbow to the diffusor without innards. If possible measure the alignment of both bearing chambers in assembly, as well as the roundness of them. Zeiss measuring machine is needed/hired. Identifying possible mismatch is important on turbo machinery Rolls Royce is a good brand, but everything was made under war-strain on delivery. Good luck.

No music , it's unnecessary and distracting

...now I understand why Rolls Royce is Rolls Royce....

Impeller is out of balance? Would explain the wear and the markings on the nut.

Got a little warm towards the end of the video,feathered prop causing not enough air flow through the radiator?

i for one wanted you to put some mad max goggles on and ride that trailer around the field using the rear dolly to steer like a boss , and get a million subs prob !

One of the best scenes on YT. Running the Merlin in the back garden. Beautiful.

An orchestra on wheels; a salty conductor.

👍👍

Incredible. Love the mindful approach corresponding with the object rather than just going through a process. Impressive and reassuring.

Have you considered TIG welding material back and machine the diffuser vanes back to shape? I get that it would be a lot of work and maybe prohibitively expensive but I'm just curious. Good content as always!

Mind blown

Outstanding vids Subbed "Nuff Said" :)

Once again,brilliant,love these old motors.Thanks.

Brilliant,thanks.

Can also recommend Sir Stanley Hookers book. It’s brilliant.

Why do you not run the engine up to 2,700, heck even 3,000 RPM even for a brief moment? I'm dying to hear full throttle sounds here lol The Merlin engine and its note will never, ever get old!

a big turbo that ! wheres the super charger hidden i didnt see it in the vid me lol

lovely note from these engines

Brilliant, I love every build video that comes from this channel, it’s absolutely fascinating.

its like they had a surplus of bolts to get rid of... i would go slightly insane doing all them up...

You were wasted at Pirelli Peter. This is fascinating

Those castings are exquisite. I can only imagine the cost of reproducing them today. Great channel, cheers from New Zealand.

That motor sounds so smooth and effortless, as though it would run for thousands of hours pulling a Constellation across the skies😃

Thanks for this always cool to see.