KiloNewton/Pound foot of thrust into Horsepower units

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SUMMARY

The forum discussion centers on converting engine thrust from Kilo Newtons and Pound-feet into Horsepower and Watts, specifically in the context of aviation engines. Participants clarify that thrust and power are fundamentally different quantities, emphasizing that there is no direct conversion between thrust and horsepower. The discussion also highlights the importance of understanding the propulsion system, as jet engines do not have output shafts like turboprop engines. Key insights include the conversion of Watts to Horsepower, which is established as 746 Watts per Horsepower.

PREREQUISITES
  • Understanding of thrust and power dynamics in aviation engines
  • Familiarity with units of measurement: Kilo Newton, Pound-force, Watts, and Horsepower
  • Knowledge of propulsion systems, particularly jet engines and turboprop engines
  • Basic physics principles related to force, velocity, and power calculations
NEXT STEPS
  • Research the relationship between thrust and power in jet engines versus turboprop engines
  • Explore the General Electric CF6 and LM2500 engines for practical examples of thrust and horsepower
  • Study the principles of power generation in aviation, including the RR Trent 60 gas turbine
  • Investigate the potential of fuel-electric hybrid systems in aviation engines
USEFUL FOR

Aerospace engineers, aviation students, and anyone interested in understanding the performance metrics of aviation engines and their comparison to automotive engines.

  • #91
jbriggs444 said:
This appears to be word salad. Possibly you envision heating up a material to the point where its atomic nuclei and their component protons and neutrons spontaneously disassociate into a "plasma" of quarks. We cannot heat a meaningful quantity of material to such a temperature, cannot confine the resulting plasma, cannot use such a process to perform useful work and cannot cause any particular material to "precipitate out". The idea of the residue being reusable is not sensible since the energy inputs to the process would be huge and almost certainly unrecoverable.
Perhaps.
 
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  • #92
What are group's comment on Bell Boeing V-22 Osprey? I feel the aircraft design is quite sufficient to inspire a class of heli-crafts of near future for both passenger and cargo modes. Yet it is not much talked about.
 
  • #93
Arjun Singh said:
What are group's comment on Bell Boeing V-22 Osprey? I feel the aircraft design is quite sufficient to inspire a class of heli-crafts of near future for both passenger and cargo modes. Yet it is not much talked about.
What market would it be serving? If you are competing against turboprop craft, the ATR 72 is larger, cheaper, faster and has fewer crew.
 
  • #94
jbriggs444 said:
What market would it be serving? If you are competing against turboprop craft, the ATR 72 is larger, cheaper, faster and has fewer crew.
ATR 72 is a conventional fixed wing aircraft. I am talking about hybrid design of the Osprey. Aviation infrastructure, especially in emerging economies is concentrated towards major cities. Short Take-off/Vertical Take-off and landing aircrafts on the other hand do not require huge runways and thus can be served by airports with limited space and thus comparatively affordable infrastructure. Aircrafts like Osprey are basically made for defence purposes and here the operating costs are superseded by their unique field deployment capacities. A class of aircrafts built on such a platform for civilian use with comparative long haul and passenger capacities to their fixed wing counterparts, would surely consider low operating and maintenance costs as its prime design feature. Depending upon their application, these aircrafts can add an entirely new branch of premium and civil utility aviation infrastructure, to operate coordinatively alongside the present day high yield conventional infrastructure.
 
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  • #95
David Lewis said:
Unless it's massless, each quantum object does have its own gravitational field

Massless particles have a gravitational field too.

Cheers
 
  • #96
cosmik debris said:
Massless particles have a gravitational field too.

Cheers
Ain't these particles somehow part of gravity itself?
 
  • #97
Arjun Singh said:
Ain't these particles somehow part of gravity itself?

Ummm, no!

Cheers
 
  • #98
cosmik debris said:
Ummm, no!

Cheers
So how would you describe their quantum presence? Is their masslessness designates some sort of quantum threshold for energy to create mass?
What's your view?

Cheers!
 
  • #99
Arjun Singh said:
So how would you describe their quantum presence? Is their masslessness designates some sort of quantum threshold for energy to create mass?
What's your view?

Cheers!

I don't know what any of this means, sorry.

Cheers
 
  • #100
Arjun Singh said:
What are group's comment on Bell Boeing V-22 Osprey?
If you need an airplane with VTOL capability then the Osprey might be one to consider, but you will pay dearly for that capability.

Arjun Singh said:
Ain't these particles somehow part of gravity itself?
My understanding is a photon will warp spacetime because of its momentum.
 
  • #101
David Lewis said:
If you need an airplane with VTOL capability then the Osprey might be one to consider, but you will pay dearly for that capability.

My understanding is a photon will warp spacetime because of its momentum.
You mean by high fuel consumption due to VTOL?
 
  • #102
Poor fuel efficiency is only the tip of the iceberg.
 
  • #103
David Lewis said:
Poor fuel efficiency is only the tip of the iceberg.
What else?
 
  • #104
Mechanical complexity, low reliability, astronomical acquisition & operating cost, maintenance requirements, accident rate and pilot skill required.
 
  • #105
David Lewis said:
Mechanical complexity, low reliability, astronomical acquisition & operating cost, maintenance requirements, accident rate and pilot skill required.
Yet all these factors can be sorted out in the design upgrades of later class of VOTLs/STOLs. I believe Osprey's current design is good enough to inspire a whole new class of aircrafts without competing with conventional helicopters or fixed wing planes. A lot of its maintenance and handling complexities if any are I believe due to its unique use of twin turbo shafts which perhaps in future designs would become more integrated with the wing and fuselage, making the aircraft easier to operate.
 
  • #106
You're right. As technology advances, VTOL will become more competitive with conventional fixed wing.
 
  • #107
David Lewis said:
You're right. As technology advances, VTOL will become more competitive with conventional fixed wing.
I believe VTOLs will add to the vital side of aviation nomenclature of near future, let's say within a decade or so if I am not over stating. The reliability, frugality, handling parameters, usability and overall performance criteria of conventional fixed wing planes I don't think can be competed with in the traditional operational domains, at least not in foreseeable future.
 
  • #108
David Lewis said:
My understanding is a photon will warp spacetime because of its momentum.
Relativity equation states that energy of a particle is product of its mass and square of its velocity at the speed of light. At this state the particle mass simply converts to energy aligned to universal law of conservation of energy. To go beyond spacetime threshold a force has to be acting on the photon by virtue of its change in momentum or simply it needs to accelerate, p=mv or f=m(v2-v1) which is not possible in our dimension so thankfully spacetime would stay intact. Am i right?
 
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  • #111
This thread has veered a ways off-topic now, so it's a good time to tie it off. Thank you to all who contributed. :smile:
 

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