PPRuNe Forums - Search Results

Search: Posts Made By: keith williams

Showing results 1 to 4 of 4
Search took 0.00 seconds.

Forum: Tech Log

7th Oct 2013, 08:50

Replies: 27

Max Endurance Speed / Min Fuel Flow

Views: 13,367

Posted By keith williams

You are quite correct, but I do not believe that...

You are quite correct, but I do not believe that I have ever said that increasing RPM alsays increases TSFC. If I did it was an error on my part.

At idle RPM most of the energy from the fuel is...

Forum: Tech Log

2nd Jul 2011, 16:07

Replies: 27

Max Endurance Speed / Min Fuel Flow

Views: 13,367

Posted By keith williams

Fuel flow is a measure of the power going into...

Fuel flow is a measure of the power going into the engines, but it is not a direct measure of the power coming out of them.

Power output / power input = Efficiency.

Unfortunately engine...

Forum: Tech Log

29th Jun 2011, 13:13

Replies: 27

Max Endurance Speed / Min Fuel Flow

Views: 13,367

Posted By keith williams

I do not believe that it is always as simple as...

I do not believe that it is always as simple as that.

If we take the example flown by FE HOPPY

With all engines operating the thrust required at Vmd may be too low to enable the engines...

Forum: Tech Log

29th Jun 2011, 11:26

Replies: 27

Max Endurance Speed / Min Fuel Flow

Views: 13,367

Posted By keith williams

The problem with the statement that ...

The problem with the statement that

is that it is based on a number of (often forgotten) simplifying assumptions.

One of these assumitons is that the fuel required to produce each unit...

Showing results 1 to 4 of 4