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Classic Aero Machining Service
Приєднався 3 бер 2014
7 Cylinder Gnome Rotary Engine Run
Short video of our 7 Cylinder Gnome Rotary being run on the test stand at the Omaka Aviation Heritage Centre Wings and Wheels Day.
Video provided by James Orphan on behalf of the Omaka Aviation Heritage Centre.
Video provided by James Orphan on behalf of the Omaka Aviation Heritage Centre.
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Відео
Manufacture of Gnome Rotary aircraft engines
Переглядів 4562 роки тому
A couple of run of Gnome #10 fitted with an electric starter. We are test running a Fokker Dr1 prop first followed by a Sopwith 1 1/2 Strutter prop
Manufacture of Gnome Rotary aircraft engines
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This is the very first run of engine #10 which is going into a Fokker DR1
Prop Test
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Shown here is a couple of runs of the Cams Gnome Monosoupape. The first run is with a prop which is for a Sopwith 1 1/2 Strutter and the second run is with a prop for a Fokker DR1. We were checking on a known engine to see what rpm each prop would pull.
Cams Gnome Rotary in Sopwith Pup replica at Omaka New Zealand
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Video of the Sopwith Pup flown by Wayne Tantrum. It is a long taxi out to the runway and you will notice that he is blipping the engine to keep the rpm down. What you can't see is that there are 2 other aircraft formating on him and he is running the engine at the 1/2 ignition setting for much of the flight to reduce his speed to match the other aircraft.
Prop test on100 hp Gnome Monosoupape
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We used the Omaka based Sopwith Pup which is fitted with a Cams new built Gnome 100 HP Monosoupape engine to trial 2 different props. The first prop is what it normally flys with and the second prop is slightly larger and also has more pitch. Engine speed is slightly lower with the larger prop, performance is also a little better. Have only cut out a little part where we changed props in the mi...
Omaka based Replica Sopwith Pup Fitted with 100 HP CAMS Gnome Rotary.
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Video of a short flight in Pup from start through to engine shut down. View from just about and to the left of pilot, top rear centre strut.
Sopwith Pup based at Omaka fitted with CAMS 100HP Gnome Rotary engine.
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Video of Pup flight Tuesday 23rd Feb 2021 Have only trimmed a little bit out of the warm up at the start. Some points to note: After the initial couple of coughs and a warm up and just prior to the chocks being pulled you can here the engine miss a little. What Wayne is doing is closing the Tampier (fuel control) till it starts to miss, then goes forward towards to make the mixture rich and the...
Testing of DR1 prop
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Testing of a new prop for a Fokker DR1 that has been made to run on our Gnome rotary engine.
Gnome video with engine specs
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Here is a video of the Gnome running that has some specs on the engine with it. This engine is using the electronic ignition so no need to hand start it. Note that some of the figures stated will vary depending with different propellers used.
How the Gnome rotary engines works
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Want to know more about how the Gnome rotary works, here is a short video to show you more about it.
Sopwith Pup flying at Classic Fighters Airshow 19
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Sopwith Pup flying at Classic Fighters Airshow 19
Gnome Monosoupape New Build (Single Valve)
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Gnome Monosoupape New Build (Single Valve)
This video is gold
How does the inlet gas reach the cylinder? Via 2-stroke like scavenge ports?
they actually did make a six cylinder at one point... with the peculiar firing order one expects... as did lamplough but he chose scavenged two stroke over fourstroke...
Just brilliant engineering. My goodness ... like what was that design discussions going on when such things are being conceptuelised !!!
High maintenance ,but did the job
is a dual or 3 bank of 5-9 cylinders possible making one out of vw parts? custom rods, crank, and case of course if such doesnt already exist.
Comment ont ils fait pour équilibrer le tout ? Tous ces cylindres en rotation, ça s'équilibre simplement avec la l'inertie du moteur ?
World War I pilots inhaled and swallowed a considerable amount of castor oil during flight, leading to persistent diarrhea. Perhaps this is why WWI pilot uniforms were brown.
Still using castor oil? I wonder if regular 2 cycle oil would work, like in marine outboard motors?
that 200lbs of rotating mass and it slinging oil out must have been horrible in an open cockpit 1200lb plane
i wouldnt enjoy that hunk of metal spinning so fast. impressive regardless. and here i am unable to fix my 125cc chinese scooter engine lol
just stack two of them, gear them oppositely, give them own prop, doubling the HP and eliminating the precession issue. ...no one has the balls to try this????????????
I think that would be sooo heavy
I am having a hard time understanding this, can someone help me understand?
What part do you not understand?
The engine block spins
WOW! Thanks for explaining.
I want to know ho the made the machinery they used to make the fantastic engines back in the early 1900's.
I know this engine tech was short lived, but at some point did they find a way to control engine power? As many on this noted, it either full power or idle
Some manufacturers were developing carburetors with throttles mounted to the hollow crankshaft but Rotary engines were quickly reaching the limits of their potential.
Fascinating... mind blowing engineering really. Especially for 100 years ago
Monosoupape literally means one valve. So that explains part of the engine. But I think it also had a butterfly/reed valve, in top of each piston. So it would suck in fuel and air mixture through that butterfly valve in the the piston, and then the exhausts would be released through the single real valve in the top. Real valve, as in being controlled by the cam. But I might be wrong here. I have some vague recollection that the piston valve was not really needed, and it kept jamming, because of the stickiness of the castor oil used for lubrication. So the Monosoupape version, that is the single valve version, might be a later version that did away with the piston butterfly/reed valves. And used ports in the cylinder walls instead, like a two stroke engine. Which would make the name make sense, pointing out that we now only have one valve, the reliable one, and have gotten rid of the troublesome piston top valve. I'll have to google for this info some day in the future... 🙂
🟥 Fascinating engineering but it looks like a lot of reciprocating mass.
If you've ever been around world war 1 era rotary engined planes they sound weird when they come in for a landing. Remember there's no throttle so either it's on full power or it's off. The pilot will line up with the runway and turn off the engine. They loose speed and the pilot turns the engine back on to gain a little bit more power then cuts it off again. The prop windmills when the power is cut so restarting is easy. Eventually they land and the engine stays off.
I would love to see some diagrams of that fuel delivery system. I have a good mechanical mind and it feels like some 2 stroke elements going on here. Very interesting.
Induction to the cylinders is similar to that found in two-strokes but relies on suction in the cylinders rather than pressure in the crankcase. The earliest Gnôme engines had suction-operated intake valves in the pistons. Later this design was abandoned in favor of induction ports in the cylinder skirts. Since the crankshaft and crankcase also serve as the induction system, oil was mixed in the fuel and blown from the exhaust, again similar to two-stroke operation. These were four-stroke engines, however.
Who the hell puts music over this
I believe it was developed for the perpose of allowing long wait times on the field to await the signal to take off, without the problem of overheating.
That was a great explanation, I never realised how the carburation worked before.
This engine is a masterpiece, true rotary engine I think France used them on their Spads
Not spads, neiuports
nicely done! thx
Great video really enjoyed watching, what a interesting engine.
For those who don't understand terminology .... SLOW DOWN, and explain what the parts do in simple terms
What’s the point of the entire thing rotating?
Why waste the power produced by the engine in rotating the engine itself
It provides cooling and eliminating the need for a heavy flywheel, they ran extremely smooth without vibration and also didn't needed to be warmed up deforestation takeoff
Great video; very informative.
what about the internal crank and con rod arrangement?
So basically it’s a two-stroke, right? I think Bleriot’s 3 cylinder Anzani engine worked on the very same mechanical principle..
...top drawer post, good animator!...be well!..l
It's not a rotary. A wankel is a rotary. This is a rotational engine. I know my machine shop experience would mean nothing on the internet nowadays but please look it up. I know it's not that big of a deal but to me it's like when people say that the merlin engine gave the mustang it's great range. It's just not true. Or today's engines are so clean and efficient. It's just not true.
Wankel is a rotary PISTON engine, not a rotary engine.
@@alexjohnward so. It's not a rotory because it has a rotor?
A four stroke using two stroke induction and transfer, with valve exhaust.
WHAT IS 2-STROKE INDUCTION?
How is 2-stroke induction different than 4-stroke induction?
"Is that an engine or a flywheel?" "Yes."
Interesting, good demonstration
wouldn't all that rotating mass be like a a big gyroscope in the nose?
Yes. In practice if a pilot in a Camel wanted to change direction 90 degrees to the left, it was easier and faster to simply do a 270 degree turn to the right.
The gnome rotary; the best worst engine ever.
love to see the comparison with listed pros/cons next to the ww1 rotaries
Should design two banks, make it contra rotating.
So it has transfer ports but air flow reverses down the exhaust so it operates as a four stroke.
Flying is inherently dangerous. Add a wood framed fuselage and wings, add 30 gallons of fuel, add being shot at with .50 caliber machine guns, and top it off with this 100 HP motor. Then a life expectancy measured in weeks makes sense.
In WWI they pretty much all used 0.30 caliber MGs.
I’m not sure how true it is but I heard these rotary engines were made because early attempts at radial engines couldn’t keep the cylinders cool effectively enough so they made it so the entire engine rotated to create better air flow over the cylinders. Obviously this problem was solved due to the reemergence of static radial engines but I’ve never found what actually made them dissipate heat better.
@@RM6737Look son, you are completely full of shite. There is no such thing as a "Rotary Radial" it is an OXYMORON. An engine can either be a Rotary, or a Radial... it cannot be both. Please stop posting lies and ignorant misinformation about a topic that you are very clearly not qualified to discuss intelligently
Static radials were designed to run very rich which cooled the engine. Eventually engineers designed much better cylinder head fins so rich mixture was not needed. That is how Lindbergh crossed the Atlantic without running out of fuel.
I never knew the cylinders are what rotated on these things. That is just crazy, and impressive how they were able to come up with this well over 100 years ago. I also got a little giggle over both the fuel per hour as well as oil per hour use. I knew rotaries use oil, but having figured out how much per hour it used was needed for an aircraft.
Excellent discussion - thank you very much! Can't say how much I appreciate outfits like this building working replicas of such historic engines. So see, hear (and smell) one running a century after they ceased to be used is just amazing. Gotta hand it to the original designers - the Gnome and Rhone engines and their Oberusel clones powered important aircraft right through World War One.
Well….I learned nothing.
Don't feel bad. Only way anyone could have gotten anything out of that would be if they already knew how these engines work.
It's still a 4 stroke, isn't it?