SEL TEMP & COLD CLIMATE

[737300737300]

What does the SEL TEMP on the Takeoff ref page do? I know you enter a assumed temperature for a reduced thrust takeoff, but what exactly does this mean, and how does it work? Also does anyone have any documentation on the new cold climate fix?

Thanks,
Brad

[shaun]

Hi,
Someone please correct me if i,m wrong. When weather (temperature & pressure altitude), runway conditions and runway length allow, you can opt for a reduced thrust takeoff, therefore to save fuel on takeoff. I suppose what it boils down to is the fact that you can reach VR with less acceleration over a slightly longer distance, therefore saving fuel.

pass on the other one.

Regards Shaun.

[biggles70]

I heard it was a saving on engine wear and tear as well as a fuel saving. But as engines are supremely expensive compared to fuel I would think lower wear and tear might win over fuel costs? Im not an airline bean counter so I wouldnt know really.
Useing lower N1 settings sort of doesnt wind the meter (tachometer) that measures the time to engine overhaul as fast.

In piston engine aircraft, the faster the prop and engine turn the fast the Tachometer clicks over. When paying for hire of an aircraft timed by tachometer, go high and use lower rpm settings and do long descents at low revs as well.

Biggles