How to use the “Limitations” tab, with “K” enabled:
1/ Start by filling the fields DOW, MZFW, MTOW et MLW...
Please note that, in regards to the MTOW and MLW, the day’s limitations might be more restrictive than the structural ones (runway condition, length, weather, obstacles etc...). You should of course input the most restrictive one.
2/ Then, fill-in the “trip” and “at LW” fields. Most airlines flight log should give those predicted figures.
This input is the starting point of all calculations ! All trip and LW figures displayed (in green because computed by the app) thereafter will be based on this initial input.
3/ Then, fill-in the taxi (optional) and the K figure.
Note that you only need to input the decimals, as the “1.” will be displayed automatically.
Now, when you press the “Done” button on the keyboard to validate K, A FIRST COUPLE TRIP / LW will AUTOMATICALLY be displayed IN GREEN in the “trip” and “at LW” fields.
Understand that the initial values you entered are still retained by the app. They are not displayed any longer though (except if you re-edit the K field, as these values are all linked).
These initial values will only be deleted by:
- a NEW “trip” input (and its corresponding “at LW” input),
- a touch on the “Clear flight” or “Clear all” button.
Now, 2 things can happen:
- Your are limited by your LW:
The displayed trip figure corresponds to your MLW. If no Bloc or Payload figures were imposed, the app displays the max Bloc that would still enable you to carry the max payload your plane can handle (MZFW - DOW). If one of these 2 figures WAS imposed, the app adjusts the other one to display the max value that would keep you within limitations.
- Your are limited by your TOW:
Now, this is tricky ! The displayed trip figure would then correspond to the LW resulting from a take-off at your MTOW. And, that LW is displayed in the “at LW” field. The Bloc / Payload figures are displayed along the same logic as above.
4/ You can then choose a LW of your choice: simply input it in the “at LW” field, and the trip figure will adjust to that new LW.
NOTE: NO Bloc / Payload figures will then be displayed by the app until you have chosen either a bloc or a payload. Once you’ve input one of them, the other will adjust to ensure a landing at your selected choice.
I do hope I was clear enough !
Please feel free to give me feedback at : serge.iphone@me.com
Jet Fueling
Last update: 3.2, on march 01 2009.
Submitted on: august 27 2008
Category: Utilities
Sub-category: Productivity
Latest changes:
- "Fueling" tab:
1/ Fuel "density" (specific gravity) can now be expressed in Kg/l, lb/USg or lb/ImpG, REGARDLESS of the fuel figures input unit. (thanks to Hayo Harmens for this suggestion !).
2/ Added a navigation/dismiss toolBar on the keyboard
3/ Added a "morphing" action in order to present all editable fields when the keyboard is presented.
4/ Added à third option to the "inverted calculation": British Airways crooked way of doing things (wink to Captain Colin Dick...), called: "BA's Computed Remaining"...
- "Limitations" tab:
1/ A "transport coefficient" (labeled "k" here) can now be used. It allows for a "trip" correction due to extra (or less) carried weight (fuel and/or cargo), and therefore provides a more accurate Bloc / Payload couple to remain within limitations.
3/ New color coding:
BLUE for imposed values by user,
GREEN for application-computed values.
