This worksheet computes the N1% for a flexible temperature derate in the BAe 146. It uses the tables from the 146 Professional operations manual and obeys all the rules written there. For now, it only does the calculation in Engine Anti-Ice OFF situation. It also does a rough take-off distance (up to 35 ft above the field) calculation based on density altitude, N1% and TOW.
Usage:
- in the Aircraft type drop-down menu, choose your variant
- insert field altitude, temperature and QNH
- you also have the option of choosing wether it's an engine anti-ice ON or OFF takeoff
- insert take-off weight; if it is greater than the variant's MTOW, it will turn red
- insert FLEX temp you want to compute; the cell will turn red if bellow 15 C with engine anti-ice ON or bellow 20 without engine anti-ice; try a higher flexible temperature if that happens
- the FLEX N1 percentage will show in the respective cell; if it doesn't obey all the rules stated in the tables, it will turn red, so try another flex temperature
- the T/O distance will show a rough calculation of the take-off distance; compare it with the runway at hand
!!!NOT FOR REAL LIFE FLIGHTS!!!
P.S. I've also made 5 airframes for the -100, -200, -300, -200QT and -300QT in SimBrief reflecting their respective parameters (e.g. weights, passengers, payload). You can use them via the following links:
-100
-200
-300
-200QT
-300QT
voltigeurramon
achitan author
5 months ago
TimVS
Thanks for the useful tool and the Simbrief profiles. Got to look after the engines on this old girl but probably won't use it at LCY!
Fibrohacker
Kick A$$! Thanks
VanDisaster
Hey, thanks! very brave, derating a 146 😀 it's a good sanity check tool too, though.
Thanks for the simbrief profiles also, although the -100 link is apparently invalid.
achitan author
just changed the -100 link and seems to be ok now. thanks for your comment.
2 years ago