I don't get the power output they use for jet-engines......
40.000 hp is ALLOT. I work on a tugboat with 5500hp, and i bet it can hold back several of these jet engines just by pulling power (or thrust in case of a jetengine).... So how can this be 40.000hp? Or are the hp of a jet-engine different then diesel hp's? :)
@BelgianEvo Thrust calculations, whether for aircraft or tugboats, is always hard to get a feel for. The power of this engine in service is easily measured, because it generates electricity.
Your tug probably pulls with about 50,000 lbs or so. An airborne Olympus has about 35,000lbs of thrust, but is moving at 500 mph or so...
An Olympus in a large tugboat, geared for a similar top speed as yours would pull like a 40,000 hp tugboat.
@AgentJayZ : The tug pulls 50.000kg or 110.000lbs (calculated online because we don't use LBS here :-) I'm sure if you mount 3 of those turbines on the back of the tug and you put them in forward thrust, that the tug will still be able to go astern :-) It's indeed hard to get that you can get 40.000hp from an engine as small as that. The engines in the tug weigh about 25tonnes each..... You can see them on some of my movies :)
@BelgianEvo Ah, you need to take a look at my latest video about power turbines. For a jet powered tug, to use the engines in their air-thrust configuration would be weak, because the closer the jet stream velocity is to the vehicle velocity, the higher the efficiency gets.
So we don't use thrust at all, but a power turbine to get about 35,000 or more Hp out of the exhaust and into a turning shaft. Maybe then a gearbox and then a huge, slow turning prop, and now our boat can really pull.
@AgentJayZ : And yeah, the tug is only moving at aprox 15mph instead of 500mph :-) But it also hs allot of weight/water to move out of the way :) It weighs 1212542lbs or 550tonnes
they seem to be used in many applications from fighters, EE lightning i think, the mighty Vulcan (series 202s) to concorde and i know royal navy ships also use them and now ive learnt they are also used in power stations.. a classic old engine..
So there's no mechanical power take-off? It's the hot exhaust gas itself turning the generator (when it's installed wherever it's going, that is)? Just curious, as I always imagined some kind of geared PTO on these aero-derivative gas turbines to power the electric generator.
@HollywdPatGB Yes... The engine's HP turbine is spinning at around 8,000 and its LP turbine is running at around 4,000. The resulting exhaust is sent through a separate piece of equipment called a power turbine which turns a shaft, and the electrical generator or other load is attached to that shaft.
I seem to remember the early Olympus had steel blades in the low pressure compressor is it still the same? Also the EPR was about 10.1.? I assume you run them more politely now? Thanks again wonderful video, bring back so many memories.
All the LP compressor blades are titanium alloy in all of the engines we have seen so far.
We don't use EPR, but for our test we measure " tailcone pressure", which is the pressure the engine produces against a calibrated exhaust restriction.
hmmmm thanks for uploading Jay. loving this olympus :) Is it the same one in the other video?
Also... some questions. What causes the ticking after shutdown? is this classed as a turbofan or turbojet engine? I would have said turbojet, but i have been wrong.. some engines i have seen that look like this have been turbojets, and others that look identical from the inlet have been turbofans. I always thoght turbofans were ones with honking great blades on (like commercial jets)
I don't get the power output they use for jet-engines......
40.000 hp is ALLOT. I work on a tugboat with 5500hp, and i bet it can hold back several of these jet engines just by pulling power (or thrust in case of a jetengine).... So how can this be 40.000hp? Or are the hp of a jet-engine different then diesel hp's? :)
BelgianEvo 5 months ago
@BelgianEvo Thrust calculations, whether for aircraft or tugboats, is always hard to get a feel for. The power of this engine in service is easily measured, because it generates electricity.
Your tug probably pulls with about 50,000 lbs or so. An airborne Olympus has about 35,000lbs of thrust, but is moving at 500 mph or so...
An Olympus in a large tugboat, geared for a similar top speed as yours would pull like a 40,000 hp tugboat.
AgentJayZ 5 months ago
@AgentJayZ : The tug pulls 50.000kg or 110.000lbs (calculated online because we don't use LBS here :-) I'm sure if you mount 3 of those turbines on the back of the tug and you put them in forward thrust, that the tug will still be able to go astern :-) It's indeed hard to get that you can get 40.000hp from an engine as small as that. The engines in the tug weigh about 25tonnes each..... You can see them on some of my movies :)
BelgianEvo 5 months ago
@BelgianEvo Ah, you need to take a look at my latest video about power turbines. For a jet powered tug, to use the engines in their air-thrust configuration would be weak, because the closer the jet stream velocity is to the vehicle velocity, the higher the efficiency gets.
So we don't use thrust at all, but a power turbine to get about 35,000 or more Hp out of the exhaust and into a turning shaft. Maybe then a gearbox and then a huge, slow turning prop, and now our boat can really pull.
AgentJayZ 5 months ago
@AgentJayZ : And yeah, the tug is only moving at aprox 15mph instead of 500mph :-) But it also hs allot of weight/water to move out of the way :) It weighs 1212542lbs or 550tonnes
BelgianEvo 5 months ago
@BelgianEvo Some of the Royal Navy aircraft carriers, which are smaller than the US ones use two marine Olympus engines, and they can really move.
AgentJayZ 5 months ago
The Marine Olympus is still repaired in the UK by Rolls-Royce. There it is tested indoors an ran on a type of diesel
TheCriticalfilm 11 months ago
they seem to be used in many applications from fighters, EE lightning i think, the mighty Vulcan (series 202s) to concorde and i know royal navy ships also use them and now ive learnt they are also used in power stations.. a classic old engine..
fairclought7 1 year ago
So there's no mechanical power take-off? It's the hot exhaust gas itself turning the generator (when it's installed wherever it's going, that is)? Just curious, as I always imagined some kind of geared PTO on these aero-derivative gas turbines to power the electric generator.
thanks, btw, very cool & interesting video!
HollywdPatGB 1 year ago
@HollywdPatGB Yes... The engine's HP turbine is spinning at around 8,000 and its LP turbine is running at around 4,000. The resulting exhaust is sent through a separate piece of equipment called a power turbine which turns a shaft, and the electrical generator or other load is attached to that shaft.
AgentJayZ 1 year ago
Whats with the piddlizing fire extinguisher.
Like that would help if this goes badly.
skeletorphd 1 year ago
@skeletorphd Yes, I think you're spot on about the usefulness of a 20A10BC fire extinguisher in this case. Still, there are rules...
AgentJayZ 1 year ago
I seem to remember the early Olympus had steel blades in the low pressure compressor is it still the same? Also the EPR was about 10.1.? I assume you run them more politely now? Thanks again wonderful video, bring back so many memories.
102trafalgar 2 years ago
All the LP compressor blades are titanium alloy in all of the engines we have seen so far.
We don't use EPR, but for our test we measure " tailcone pressure", which is the pressure the engine produces against a calibrated exhaust restriction.
AgentJayZ 2 years ago
hmmmm thanks for uploading Jay. loving this olympus :) Is it the same one in the other video?
Also... some questions. What causes the ticking after shutdown? is this classed as a turbofan or turbojet engine? I would have said turbojet, but i have been wrong.. some engines i have seen that look like this have been turbojets, and others that look identical from the inlet have been turbofans. I always thoght turbofans were ones with honking great blades on (like commercial jets)
thanks again!!
GenXCypher 2 years ago
The ticking is in the one-way ratchet mechanism of the starter drive.
So the engine can't turn the starter...
This is a turbojet engine, because it does not bypass any air around the core.
Modern fighters use low ( 1:1 ) bypass turbofans.
Airliners use high ( 6 or more : 1 ) bypass turbofans, and so have great honking 1st stage (fan) blades.
The video from 08 is of engine #61, this video is of engine #60.
They will be working half a world apart...
AgentJayZ 2 years ago
Actually, I just watched the ending again, and in this case, you don't hear the starter ratchet, because it is on the side of the engine.
The clicking in this video is the sound of the big titanium first stage compressor blades shifting in their mounts.
This is normal, as the blades are mounted so they can pivot, but they can't move radially or axially.
AgentJayZ 2 years ago
Should have paid more attention to the video description.....all my questions are answered!
adape2003 2 years ago
Really interesting video, I would be fascinated to get so close to a running turbine! Is this another gas generator for power generation?
adape2003 2 years ago
Yes, this is better. About 25% the resolution of the original footage, and maybe one percent of the impact of actually being there.
N2 is the rpm of the high pressure system of this two-spool engine.
Normal maximum is 8000, and today we got to 7000.
Not bad for a 40,000 Hp engine.
This is the most powerful, but not the loudest, engine we have tested so far...
AgentJayZ 2 years ago