Bristol Hercules Radial Aircraft Engine Demonstration
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- Опубликовано: 6 фев 2025
- This is a longer video that shows the start sequence of a Bristol Hercules engine and a bit of ground-running. They did encounter a small issue with a spring so the actual running doesn't start until 03:40. However, the footage up until that point has some interesting parts, so make sure to watch that as well.
This is probably our best video so far with a nice full frame view of the engine and its beautiful exhaust note coming right at us. Also note how the exhaust pipe goes from green to brown as it heats up.
Enjoy!
I'm just happy someone ever did make sleeve-valve big radials like this. What a beauty
Love seeing old bits of kit, lovingly restored to running condition and not sat in a museum gathering dust. Love the way the exhaust changed colour as the engine got to runnong temp. Nice one!.
The lack of valve train noise really makes this motor sound satisfying! A true marvel of aviation engineering and power!
There is still valve train noise, it just sounds different. The sleeve valve actuation mechanism inside the block is hideously complicated, each sleeve has its own gear fed off of other gears. Lots of gear and linear slider pin noise present.
@@GGigabiteM It looks complicated but that's mostly because there are 14 cylinders and they're all driven from the front (shafts pass between the front cylinders to drive the sleeves of the rear ones).
@@nerd1000ify I know how sleeve valve engines work, which is why I said what I did.
I've seen exploded diagrams of the Hercules and the Centaurus.
@GGigabiteM it's certainly more complicated than a traditional radial with cam rings, but my point is that the complexity is mostly a matter of the multitude of cylinders. If you look at a single cylinder it's not too bad (in fact there are less parts in the valve train than there would be for a poppet valve single) but they've coped that 14 times around the engine which results in the whole 'Swiss watch' look.
I am amazed that things like this were designed and built without computers
they had computers they were called slide rules
i love seeing and hearing these old warbird engines running , a beautiful piece of history ,,I love piston airplane engines
i live in the USA and have a large collection of diesel and gasoline truck and tractor engines ,most notably detroit 2 stroke diesels which i have over 100 of going all the way back to WW2 ,,and one special engine i would dearly love to restore and that's a 1943 Allison V-1710 ,,i also have a nearly complete packard merlin engine i found in a warehouse that i was contracted to demolish
That packard Merlin find made your year glad someone who can appreciate found it
You are so very fortunate to have these wonderful experiences.
Any 4 cylinder detroits for sale?
😅
39liters of awesomeness come alive, total eargasms!.
Well I don't know about you but I had a little more than that
@@garyhurley3271 yes..... I keep going back....... multiple times... (ahem).... now, if you’ll excuse me... NOBODY COME IN HERE!!!
Love the way the exhaust manifold heats up and changes colour, beginnning to glow!
This'll never take off !....
I love the mesmerising dance of that engine and those vanes when they seems like they are barely moving but they’re at full speed
beautiful sound....the start was like the engine start of Flight Of The Pheonix
When a legendary radial roars, you listen!
Now THATS a gorgeous sound.
Totally, almost better than the V8 sound. (11:20)
Amazing how the whole exhaust change its colour when gets warmer
is that for a reason made like that
That motor sounds like it has a bad ass cam in it.
I could listen to that sound all day.
It’s a sleeve valve.
It doesn't have a camshaft.The sleeve valves are gear driven off the crankshaft hence no interval for valve adjustment.Radials don't have camshafts in the true meaning,they have a cam ring fixed to the crank that acts on pushrods and rockers like conventional OHV engine and therefore need for periodic adjustment off the linkage.
A familiar sound! I worked as an engine fitter on the Hastings on first line, then some second line and engine bay work for two years... Flew half way around the world as Crew as well, got over a hundred hours P2 and PUT (Thanks Mick)! Reckon I could still strip one down and rebuild if I had to. Most engine work was restricted to simple maintenance as we had numerous spare brand new engines so didnt bother with major strip downs. Flying back from Gib in 1972 I think it was, we had No3 engine blow up, middle of the bay of Biscay, a LOT of Oil (30 Gallons to be exact) then No2 went awol with a fault, two feathered props but we made it back home, cut a swathe through the Heathrow Stack ;-) lol Great times. (BTW you started using a KiGas pump)..
o2filmisfun: "No3 engine" OF WHAT ? please enlighten us tiny little laymen what you are talking about. Thanks.
@@stranraerwal I would think he means the 'Handley Page Hasting' which I also worked on. I also worked on the 'Vickers Valletta' and 'Varsity' which were powered by another mark of Hercules. On the Valletta when we did some run ups we had cowlings off and the aircraft ladder tied off on the engine with me up the steps hanging on for dear life while the engine was run up to take off power to check for oil and exhaust leaks we used to do this for the air intake shutter to be checked amongst other systems. I also went many thousands of miles and hours in the air as a 'flying spanner' pulled along by the beautiful Bristol Hercules.
@@stranraerwal AWOL Absent Without Leave a military term meaning not there, absent from duty.
@@tr7v8 : I know what "AWOL" means-thanks.
@@stranraerwal No 3 engine of the Hastings A Handley Page Hastings en.wikipedia.org/wiki/Handley_Page_Hastings
Could easily fall right to sleep to this soundscape.
Best revenge on a Sunday morning after the neighbours last night party
Hahaha
Or have a few neighbors call the police for the same reason and make a report
My brother’s neighbor had an old Plymouth Superbird race car that he would fire up on the morning after the people who lived across the street had a wild party the night before. It could be heard several blocks away
@@nathanpinney4230 Thing is... Sometimes idiots are so stupid they don't understand why the noise and you don't want to bother innocent people
Fortunately the new factory fresh engine started very quickly. This takes forever.
That old girl needs to find an airframe and hit the blue again !
AMEN!
Was sure it was a boy!
That would be glorious
Now that's putting on an AIR show of your own.
See how the exhaust changed it's colour..some high exhaust temperatures🔥
I need it because i want it! Great video! Ever better audio!
That was a treat! I love those round engines!!!!
that idle is just delicious!
Pipes changing color is awesome.
What a glorious racket that makes!! Awesome
Sounds utterly glorious!
This engine produce a unique sound, very nice technology, i known it from the 2040hp SNECMA Bristol Hercules from the Nord 2501 Noratlas, and the only radial who make blue flames in the night (conventional radials have more orange flames because run richer....
Orange flames indicate incomplete combustion, not a rich fuel mixture. Sleeve valve engines are more efficient at getting a more uniform charge in the cylinder, so it tends to burn cleaner.
the downfall of the sleeve-valve engine was their horrible oil consumption ,they were much simpler in terms of their valve gear because they had none , the engine was considerably narrower in diameter than a similar sized non sleeve valve engine
@@wildcoyote34 that's totaly false: in good condition was the oil consumption comparable to the oil consumption from a US radial similar power (and TBO from the Bristol engines was 30% higher as US radials!): i see this myself because i was mecanic on Snecma Bristol Hercules (Noratlas aircraft): this engines (Bristol 739 2040HP) was built in France under license up to 1961...Only early conception Knight engines (use for example on some 30's french cars Panhard Levassor up to the 1938 "Dynamic") was oil eaters and the TBO steep was only 30000km!!!, but the Bristol technology is totaly different and much better!
@leneanderthalien actually it is NOT false at all but completely TRUE , the downfall of the sleeve valve engine was indeed it's oil usage and it's extreme complex gear train ,,and the ever increasing size of more conventional poppet valve engines which were easier to produce and cheaper as well ,,there wasn't any one thing the killed them ,,the sleeve valve engine was one of those things that was pretty much a british only thing just like the usage of water cooled engines only a very few american designed planes had liquid cooled engines ,,european planes were pretty much evenly split half and half
@@wildcoyote34 looks you understand nothing from my explanations, i was mecanic on this engine and known it good...oil consumption was not a issue except on a completly worn out engines...
Nothing like the sound of a large displacement radial!
That sound. I will sleep well tonite
Oh yeah loved the video by the way. The first big horsepower engine I ever saw first-hand was when I took a ride in a modified P-51. I wish 8 years old and have been flying my dad's tri-pacer for a year-and-a-half and thought wow this flying stuff is cool and then I met Johnny Rutherford.!!! Holyshit Batman
I'm enjoying watching your good video.
I support you in Korea.
Yc
He’s one of them
Move the wheel chocks. Let's go for a spin. Can you imagine?
Look up Guy Martin's Merlin video. He talks about what happened to his engine when he took the rev limiter off and it jumped the chocks and ran off across the workshop at full power!
lol yeah
God i hope they manage to get some of these motors for the Beaufighter project at Duxford! What a beautiful sound!
JS160LC
They getting 1 up and running then?
Looks like I’m late to the party there.
Time to research 🧐😂
Sounds like my diesel trying to start when it's super cold lol
god..this one sounds so nice. One of the best..Thanks. And probably after 10 minutes that little bucket of fuel is empty...
What a beauty! Thanks for sharing.
Very cool! What a sound! Does the exhaust color change back after it cools down?
Methinks the trailer has the right power to weight ratio
How I want my car to sound at the traffic lights....
Hell yeah!
Engine starts at 3:44
Imagine being the pilot that has to trust that engine back in the day. It takes multiple tries to start it while spitting and sputtering just to get it started then you have to fly with it lol
Remember, these engines are older than most of the people watching this.
Thing is, there are steps to starting the monsters, it's NOT supposed to start immediately, it spins to pump oil first then a couple attempts and boom.. off she goes. These radial engines were extremely reliable to fly with. There was a saying.. only a round cowl fighter is a true fighter plane lol... another was "if you want to impress your girl in WWII take a pic sitting in a p-51,.. If you want to come back from the battle sit in a p-47... I don't have a hercules but would love one. Fantastic machines
I am not downing the p-51 in any way guys n gals, just happen to love the radials and corsairs. p-47s etc... my buddy is p-51 all the way and cannot stand when i tell him it wasn't a great plane, just had a bigger gas tank and if they wanted it to be perfect it should have had a round cowl and same engine as the corsair....whistling death... hehe... of course it was a great plane, but don't tell him i said so lol
Daddski 1 good info that makes sense. How does the oiling system work in them. Since there is a cylinder on the bottom facing down where does the oil drain to and how does it not collect on the bottom (top) of the bottom cylinders piston
@@GLeszega this is a great little video to show basics, they were oil piggies lol, but i can tell you on the miniatures I have (all 5 through 9 cylinder engines on giant scale r/c planes ranging from 80 cc to 450 cc) the top cylinder never caused any issues, oil flow is basically injected then trickles. the videos are better at explaining. The issues i always had were the bottom 2 cylinders loading up and trying to drop out due to excess of fuel/oils. these run very much the same as the big boys jsut smaller. There are two siphon tubes that help with the circulation and moves the liquids from bottom back to top if that makes sense?
lol forgot the url lol ruclips.net/video/2kSkVexs3Os/видео.html
The kids in Bristol are sharp as a pistol when they do the Bristol stomp!
Everything slide rule... Amazing 😍
We would have lost the war if it took that long to start the engine!
But it did.....
I multiplied x4 as with a former seaplane (Short S.45A Solent) had. It was like actually flying with these four monsters running! (There was one in Oakland, CA on static display that I did have a chance to board. That was a number of years ago now whether she has been totally restored in air worthy condition, I just do not know.
now i know why the operator has no hair lol.
Is there a gearbox between the engine and prop? Overdriven, under driven? By how much?
Those 2,000 Horses are screaming to go airborne 😊
Beautiful, thanks for sharing
How hot does the air behind the running engine get? I mean for how long can you stand at those controls before getting barbecued? ;) Oh, and nice sound, by the way, really nice!
the air dillution produced from the propeller is so strong that the t° not significantly rise up behind the engine...
Anyone else notice the sliding door start to close due to the suction of the prop?
Marcus Keeler it happens at 7:00
Turn the intake about 180 degrees, so you can spray in "start-pilot" while starting !
for 39 litre engine , this need a large amouth of start pilot! more seriously, on all radial engines who not run (they are dry sump engines), oil did fill the lover cylinders through the piston rings, and this oil need to be evacuated before the engine is able to run clean...
Дизлайки поставили наверное жены тех ребят которые послушали это дома на хорошей акустике.
I've been thinking about upgrading my trailer it's lacking power on hills, it's a tri Axel so maybe a bigger motor than yours as yours is only a dual Axel trailer. Any suggestions, nothing over the top , just a bit more horse power or should i fit a turbo prop engine. I'm not going racing or anything stupid, just road use .
Do you have air-con in your house? No, I have a Bristol Hercules Engine.
BOTH double row engines need a top end overhaul . A pilot would never fly with engines in this state
Sleeve valve ?? Or is that the Pegasus ?
Sleeve valve, as was the Centaurus. No top end to rebuild.
It would've been nice if the model of Hercules was mentioned. Which variant is this?
That thing is awesome!
Hi Johan,
how do you start your engine. Do you need the "shower of sparks" from an iginition vibrator? (I think, this is the "ticking" sound , before you crank the starter). I don´t need one for starting my Curtiss-engine. Do you also need a primer for starting it, or can you start it only with the carburetor? If I start my engine, I have to use an external, electric-driven fuel pump and only a primer and when engine is running on the primer, than I have to open mixture on the carburetor to "auto-rich" position and not before. My R-3350-32-WA is an "only carburetor" engine, that means, it doesn´t have any injection pumps.
I`m a little bit afraid, mounting a cut-off prop. I know, it is necessarry for cooling radials. We are working on a four-blade-prop this year and I hope, it will work.
Fine qualitity and great sound, perfectly done.
Regards
Andre
***** I've just spoken to our operator and he says that the ticking sound is the fuel pump and that he is using "shower of sparks" even though you don't have to. It will probably start anyway. Apparently the primer goes straight into the compressor and we haven't tried to start it using only the carburettor, we're not sure whether it would actually start.
Thanks for the comment!
turbocompound p
Johan Christersson l
Sounds like it's feeding back through the starter,try adjust the fuel take off solenoid down to .78. Should make it start a bit eadier
lovely sound.
Jason Dalton
If i could that kinda engin in car, would a van cut it?
Nothing like the sound of round!
Blades moving so slow you can almost touch them 😂😂 awesome sound
What does the guy with the handle wind up is it the magneto
If this was a combat plane, they would be blown to shreds by now.
Imagine building an airboat around that monster 😳
Would be insane 😂
Is it that hard to crank after it has been warmed up and started? What I mean is if you shut it off right now will it crank right back immediately or do you have to froch with it again to get it smoking
Sounds great. Almost “tuned cam” like except there is no cam 😅
It's too bad that it can't go over a certain RPM, as I would love to hear it at take-off speed instead of taxiing idle shown here.
They don't to overturn the trailer
Something very unstable sound, skips even on hot
на судно на воздушной подушке ставили 2 двигателя от АН-2,это была потрясающая машина,которая меня однажды даже спасла,по приезде на берег ,Олег меня забрал и сразу по пришествии врачей ,на хирургический стол положили,эта нога у того надо нога.
yo me pregunto: Porque esta gente que tiene la suerte de tener estos hermosos motores nunca los accelera a fondo? y me respondo que: no tienen una verdadera pasion por los motores. Es una lastima no poder disfrutar ni en videos de estas hermosuras mecanicas.
Keep your hand in the pocket!
I need need a new fan, I think I just found one
That engine kicks ass
Which sounds better this motor or my harley🤔😎
The engine starts and every time the guy move a lever the engine stops. After the engine starts remove the learner away the engine knows what to do. LOL
Notice that it didn’t properly start until he stuck a pencil in the carburetor?
The McKenna brothers made a big deal about the Halifax having a blue flame coming from the engines, giving away their positions at night. I really can't find much to confirm this. The Merlins were in many planes so if the Merlin equiped Halifax had the issue so did the lanc and mosquito. If it was the Hercules engine I can't find anything to support that either. Can anyone confirm this or is it just a little bull the McKenna brothers added to their documentary to get some reaction as they commonly do?
Peorhum I'm pretty sure the colour of the flame is due to the fuel, and how much of it is burnt. An efficient burn is blue, an inefficient (not all the fuel is used) is orange. So I think it's not the engine, but I could be wrong!
Just the fact an engine has a flame showing where it is on a night operation can't be a good thing. Colour doesn't mater so much as a flame period. SO do you think the Halifax bomber had this flame giving it's position away?
Those engines that flew at night had flame suppressors. It would be hard to fined a pilot who flew one these days. Most of them are gone now and history will remember them with respect.
All the aircraft piston engines of the WW2 time period had flames coming out of the exhaust systems while in flight. Some exhaust systems were designed to meditate it, but they all produced flames.
That would make an awesome swamp hover craft. 😂😂
Harry Ricardo will be looking down smiling.
I love the strobing effect of the prop, kudos on using a good quality camera =D
You guys please use microphone protection against wind noise (not expensive) !
Bastante falto de preparación en mecánica...lindo y clásico motor inglés de la guerra..
☺👍
Left a dark patch on the concrete under the exhaust
this sound is a lullaby for real men
Does it fit in my honda?
I wanted to see the trailer take off
What a sound!
A perfect dust blower.
That thing would be perfect on my airboat....but where do I stow the fuel?
You TOW the fuel (on a barge)
Caspar Goodrich don’t know what you’re talking about, airboats are fucking killer
Excellent moi ! ,💫🌠
Very good!!
why do you actually need so much power
the aircraft would also advance with less horsepower?
more horsepower also ensures that the propeller runs more rpm?
that's not how it works out, RPM and HP have no real relation
Horsepower is rpm x torque x 3.???? (Or something) you don’t want rpm...you want reliable all day max torque at 2500rpm...any faster the prop is inefficient.....hence the big capacity of aircraft engines.
Goultek Except the HP is torque times RPM.
like last flight of the phoenix
The man is very lucky otherwise wind blow him away
That’s where you ask yourself where’s the rest of the plane lol beautiful engine she needs the sky
that exhaust pipe went from green to brown
Sweet Shoes Dude!
Maravilha. Very bealtiful. Fantástico. 🇧🇷 Lima.
Bataguassú.
Mato Grosso do Sul.
Brasil.