Hp displacement ratio

[jediali]

Turbine engines/Turbo Prop engines supposedly have the most power for their total size. A job for Myth Busters?

the gas turbine (jet engine) continually intakes, compresses, ignites, and exhausts therefore has a high power to weight ratio. It also gets more efficient as the air speed increases outside rendering the compression process less work. Furthermore they use roughly an effective compression ratio of 40:1 increasing the fuel efficiency.

(In the same theory a 2-stroke engine has a higher power to weight ratio than a 4-stroke because it completes the cycle in half the time)

[770]

Theres a turbine about the size of a viper engine with 70,000 hp. Its amazing how turbines rarely make their way into cars.

[culver]

the gas turbine (jet engine) continually intakes, compresses, ignites, and exhausts therefore has a high power to weight ratio. It also gets more efficient as the air speed increases outside rendering the compression process less work. Furthermore they use roughly an effective compression ratio of 40:1 increasing the fuel efficiency.

(In the same theory a 2-stroke engine has a higher power to weight ratio than a 4-stroke because it completes the cycle in half the time)

As I recall from my time at Rolls Royce-Alison their compression ratio was more like 9:1. The pressure in the combustion chamber is very low compared to a piston motor. Also, in automotive sized units they are not very efficient and they have poor throttle response for automotive type needs.

[culver]

Theres a turbine about the size of a viper engine with 70,000 hp. Its amazing how turbines rarely make their way into cars.

I seriously doubt the 70K hp claim. RR-Alison and Honeywell launched a new helicopter engine in the late 90s. It had about 800hp and weighted about 400lb. Future versions of that motor were expected to produce over 1000hp. Nothing around 70k hp. The 5000hp turboprop motors are MUCH larger than a Viper V10.

[jediali]

As I recall from my time at Rolls Royce-Alison their compression ratio was more like 9:1. The pressure in the combustion chamber is very low compared to a piston motor. Also, in automotive sized units they are not very efficient and they have poor throttle response for automotive type needs.

thanks for that contribution, i heard wrong

[henk4]

All else being equal your efficiency is better if you run a larger engine at lower RPM.

check this link

http://en.wikipedia.org/wiki/W%C3%A4...Sulzer_RTA96-C

and also in there is a link to specific fuel consumption. Quite interesting read...

[derekthetree]

You understood what I meant right...

Sorry for the odd wording but we all know F=Mx(AxA)

also some odd lettering what does your "A" stand for??

[hightower99]

also some odd lettering what does your "A" stand for??

A=Acceleration...

Force is equal to mass times the acceleration squared.

[derekthetree]

A=Acceleration...

Force is equal to mass times the acceleration squared.

umm. no

meet Newton's second law

http://en.wikipedia.org/wiki/Newton's_laws_of_motion#Newton.27s_second_law:_his torical_development

[jediali]

gee, lots of mathematicians here.

[derekthetree]

gee, lots of mathematicians here.

excuse me! maths is the poor relation of the true font of knowledge that is physics

[jediali]

i agree! and engineers take what scientists find out and apply it

[Sweeney921]

Force is equal to mass times the acceleration squared.

hahahaha F=ma

[hightower99]

sorry i guess that is what happens when i am posting at almost 1am and drunk out of my mind...

and when nobody gets the joke...

[jediali]

sorry i guess that is what happens when i am posting at almost 1am and drunk out of my mind...

and when nobody gets the joke...

what joke? tell us pleeasssse..