PurePower PW1000G Engine: Customer Testimonials

[sickasso72]

master antigravitics dammit!!!

[jdubincali]

I wonder if there's a way to achieve superior fuel efficiency by utilizing a sub-H20 system, reducing jet fuel consumption without compromising burn levels?

[UpperHudson]

The power in the LP shaft of a 30,000 lbf engine is roughly 30,000 hp or 20,000 kw. If the efficiency of the gearing is 99% (typical of an industrial reduction gearset), you've got 200 kw of heat to dump overboard. That's a big oil cooler, a lot of oil, a lot of air!

[paduajoseph]

@UpperHudson The LP Shaft is diff from the Fan shaft. The Fan's shaft is the one that is geared. In this case the LP shaft has a higher RPM now that it is decoupled from the Fan's Shaft at the same time they took this advantage to Counter-Rotate the LP System from the fan and they also counter-rotated the LP System from the HP System. And by the way the fuel saved from a slower fan is 2%.

[fnp90]

i believe fuel efficiency can be reach when core (hi-press compressor + hi-press turbine) rotates at a very high speed approx. 20000 RPM. In my opinion, by reducing loads on compressor by means of separate main fan from core, engine might functioning more efficiently. Fan blade also can be made as wide chord as possible to overcome slow fan rotation speed. Russian utilize contra rotating wide chord fan blades with their NK-93 engine.

[paduajoseph]

@fnp90 The blades are as wide chord as we expect. So what they did instead is they raised the Bypass Ratio to 12:1 instead of having let's say 7:1 or 5:1.

[Zoloft61]

Geared turbofan, high bypass ratio, hmmm it's beginning to look like a turboprop. So the real question is, what's revolutionary about this engine?

[theghost]

@Zoloft61 turboprop could never have as high rpm.

[kyosaisho]

@Zoloft61 , watch the video again and understand it and youll know..

[paduajoseph]

@Zoloft61 Well, we really don't know if that's all of their technology.

[paduajoseph]

Respond to this video... I think the highest of these is about 40,000 lbs. of thrust.

[UstadonKaUstad]

@Zoloft61 One analogy is like the DC-3 vs. Boeing 787. Although Honeywell had geared turbo fan technology (TFE731), the PW is much bigger (sea level thrust 5000 lbf vs. 30,000 lbf +). Also PW did a smart move by choosing risk-sharing partners (MTU, AVIO, Tech Aerospace etc.) which gives this engine huge advantage by becoming beneficiary of future technologies developed on the GTF platform e.g. intercooling (between comressors), heat recuperation (tLPT to combustor to lower T4)