The "Flying Millyard" 5 Litre V Twin first test run

Allen super love it

Genius

NUKEN FUTS !

What a GENIUS. God Bless Him!!!!!

He must be really good friends with his neighbours

A modern engineering Tesla.....😍

Verdadeira obra prima.👏👏👏👏👏👏👏👏🇧🇷🇧🇷🇧🇷🇧🇷🇧🇷

Some of the particulars,
Flying Millyard ; Engine type, Aircooled pushrod, 2-valve 70-degree V-twin ; Displacement, 4888cc ; Bore x stroke, 146 x 146mm ; Compression ratio, 6:1.
note: the low compression ratio
Modern street motorcycles usually ring in somewhere between 9.5:1 to 13.5:1
That's still amazing good for 4888cc

seriously impressive!!!

What a guy, wish I had his knowledge

Great video of a truly awesome feat of engineering, (and I don't used the term 'awesome' lightly or in the modern context where almost everything is labelled as being 'O-some' and/or 'Legen-derry'..) That engine is just a fantastic thing to behold.. However, with my retired Firefighter's head on, I would have to point out that having that flame-belching exhaust pointing directly at that plastic petrol can was not Allen's finest hour when it comes to personal Health & Safety.. I'm really hoping it was being used as a catch tank for a crankcase breather ?..

Holy crap, thats is so cool, look at the heads, the cooling fins are so sexy.

I was in a local bar lately and one of the ornaments was a full Pratt & Witney aero engine! Hard to imagine two of those monster cylinders in a Motorcycle!!! Also heard of a chap in New Zealand I think it was using two cylinders from a MERLIN engine in a bike????

🤩🇺🇸👍

10 litre v4 next please😅

Makes a Harley engine look unbalanced.

Was there anybody in this World who thought that Allen’s Engines wouldn’t start/run?

5 liters? No way.

The mad scientist!!!

Mad as a fish ! 👍👍

Can we have a 10 hour ASMR video loop of this ticking over please?

He is brilliant engineer see his mountain bikes he made for his son amazing person ,and see his workshop where build everything will surprise 😀 you all

🎶 "Good morning, neighbours..."🎵

One cylinder is bigger than my car, by 100cc.

Might help to wear a rubber mouth-piece, like boxers use, once you get that engine in a bike frame, uh?

That thing is a monster ready to eat everyone around it - including it’s creator. You could tell he delicately revved it at his own peril - just a bit - then backing away quickly before it became hungry…

For some reason, old truck engines were usually 71 cubic inches per cylinder, so I assume that old aircraft engines are twice that, or 142ci per cylinder. The math usually adds up pretty close, and here we see it again, 2 cylinders off a radial aircraft engine works out to about 5 liters, close to 300ci. What a beast!

How the heck do you make one of these ❤️

Badass

Very cool motor i want this in my garage😎😎

Looks like old Jaguar SU Carbies,Nostalgic 👍

Dang show off! If I only had the talent!!! What is that equal to? 70 deg v twin?

I often wonder about your neighbours 😂

Makes a harley look very meek

The five litre Vee twin is gorgeous, but it could be improved aesthetically if the side covers and ancillary items weren’t so ‘simple geometric shapes.’ A little creative CNC machining would improve the look of it no end. Alan, you are obviously a genius engineer to do what you do, but a little mechanic Le design would improve it immensely. Love your work Allen. You are an amazing man.

How long can you idle an air cooled 5liter without a fan?

A good sound, when cell phone is ringing!

I wanted something lighter for tossing into corners, so i went with this small twin.

That thing would be a torque monster!

I keep watching this one. My idea of a Vee twin! 🤣👏👏

Ive noticed ......
All your engines always idle perfectly and don't stall after revving.
"Just perfect " !!!!

👍💪♥️

Now put it in a cruiser.

Imagine Allen and Guy Martin together in a shed on a project...!!

Saw you on here Simon !

I wonder how economical it is

That is just sooo British. Someone working alone, builds a one-off 5l V twin motor in a shed, and when it fires up, there is no hootin' n' hollerin' like children, no high 5s. In fact, barely a facial expression to be seen!

my first thought was to see this on the front of a scaled up morgan 3 wheeler.

Harley Davidson makes the biggest Vee Twins…. Allen Millyard… hold my petrol can.