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Anonymous Wed 21 Oct 2015 12:14:48 No.891010 View Reply Report Delete

Quoted By: >>891023 >>891027 >>891079 >>891419

Why do turbofans even exist when turboprops are more efficient and produce longer range?

Anonymous

Anonymous Wed 21 Oct 2015 13:34:34 No.891023 Report Delete

Quoted By:

>>891010
"The cowl around the turbofan's large fan allows it to perform better than an open propeller at high speeds..."

http://aviation.stackexchange.com/questions/4966/what-is-the-difference-between-a-turbofan-and-a-turboprop-engine

Anonymous

Anonymous Wed 21 Oct 2015 13:58:17 No.891027 Report Delete

Quoted By: >>891372

>>891010
> produce longer range

The Dash 8 400 series can take 68-86 people up to 1567 miles at 414 mph.

A comparably sized jet, the E-175 for example, can carry the same number of people up to 2400 miles at 553 mph.

An ATR 72-600 can carry about the same number of people less than 1000 miles at a cruise speed of 316 mph.

Anonymous

Anonymous Wed 21 Oct 2015 15:32:11 No.891079 Report Delete

Quoted By:

>>891010
Turboprops are shorter range, though, OP. Turboprops are more fuel-efficient and cheaper to run but have shorter range, hence their being used on smaller regional lines

Anonymous

Anonymous Wed 21 Oct 2015 16:08:04 No.891091 Report Delete

Quoted By: >>891291

A powerful enough turboprop to power an long liner is too loudly for airports norms.

But this is going to change with next technology like open rotor. Google it.

Anonymous

Anonymous Thu 22 Oct 2015 01:01:00 No.891281 Report Delete

Quoted By:

jet power still has better power to weight ratio and high altitude performance.

Anonymous

Anonymous Thu 22 Oct 2015 01:46:23 No.891291 Report Delete

Quoted By:

>>891091
They have no chance of being a better solution than top-mounted, next generation, ultra high bypass turbofans.

Anonymous

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Anonymous Thu 22 Oct 2015 13:23:10 No.891372 Report Delete

Quoted By: >>891401

>>891027
with the same amount of jet fuel?

Anonymous

Anonymous Thu 22 Oct 2015 14:56:16 No.891401 Report Delete

Quoted By:

>>891372
The dash 8 400 series goes farther on 1 lb of fuel that the E-175 which in turn goes farther on 1. Lb of fuel than the ATR-72

Anonymous

Anonymous Thu 22 Oct 2015 15:02:11 No.891404 Report Delete

Quoted By:

Propellers are beautiful

Anonymous

Anonymous Thu 22 Oct 2015 15:33:02 No.891419 Report Delete

Quoted By:

>>891010

Have you looked at time between overhauls, maintenance costs, etc.?

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