# 涨油价要不要提前加油？航油价格和DELTA BURN

10月1日开始，航油又要涨价了。大家在考虑，要不要在9月30日晚上多加点油。但是就和中石化加油站涨价前夜一样，所有人都挤在0点前加油，加油站（加油工）都忙不过来。

46吨 × （7000元每吨 – 7500元每吨 + 0.006吨每吨 × 7000元每吨） = -21068元

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\begin{align}
F_{t1} &= 前段起飞油量 \\
F_{t2} &= 后段起飞油量 \\
F_{land} &= 前段落地油量 \\
F_b &= 前段耗油 \\
\Delta F_b &= 前段增加的耗油 \\
X &= 增加的落地油量 \\
P_{old} &= 老油价 \\
P_{new} &= 新油价 \\

F_{t1} 消耗 F_b &= F_{land} \\

(F_{t1}+X+\Delta F_b) 消耗 (F_b+\Delta F_b) &= (F_{land}+X) \\
\\

Cost_1 &= (F_{t2} - F_{land})*P_{new} \\
Cost_2 &= (F_{t2} - F_{land} - X)*P_{new} + X * P_{old} + \Delta F_b * P_{old}\\
\Delta Cost &=Cost_2 - Cost_1 \\
&= F_{t2}*P_{new}  - F_{land}*P_{new} - X*P_{new} + X * P_{old} + \Delta F_b * P_{old} - F_{t2}*P_{new} +F_{land}P_{new} \\
&= \cancel{F_{t2}*P_{new}}  - \cancel{F_{land}*P_{new}} - X*P_{new} + X * P_{old} + \Delta F_b * P_{old} - \cancel{F_{t2}*P_{new}} + \cancel{F_{land}P_{new}} \\
&= X * (P_{old} - P_{new}) +\Delta F_b * P_{old} \\
\\

\Delta F_b和X之间有比例关系，\\

\Delta F_b &= X * B_{pct} \\
\Delta Cost &=  X * (P_{old} - P_{new}) + X * B_{pct} * P_{old} \\
&= X * (P_{old} - P_{new} + Pct * P_{old}) \\
\\

\because X &>0 \\
\therefore P_{old} - P_{new} + B_{pct} * P_{old} &< 0 \\
\therefore B_{pct} &< (P_{new} - P_{old})/P_{old} \\

\end{align}


# OPT落地性能的Recommended Brake Cooling Time Some operators may instruct their crews to leave the gear extended for a few minutes after each takeoff. Each of these will be helpful, and short-haul operators usually employ one or more of them to avoid fuse plug melting.

For normal operations most landings are at weights below the quick turnaround limit.通常情况下，落地重量都低于quick turnaround limit。
Application of there commended cooling procedures shown will avoid brake over heat and fuse plug problems that could result from repeated landings at short time intervals or a reiected takeoff等待图标中的时间，可以避免在重复落地或中断起飞时造成热熔塞融化. The chart shows the brake energy perbrake added by a single stop. Total brake energy is assumed to be equally distributed among the operating brakes. Total brake energy is the sum of the residual energy from prevous stops plus the energy added.

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# LKTRA37Z限制区，Flight Plan Buffer Zones（FBZ）

LKTRA37Z： Traffic is not allowed to fliehtplan across active military area FBZ

Flight Plan Buffer Zones (FBZ)
Flight Plan Buffer Zones (FBZ) are established around AMC Manageable TSA / TRA for flight planning purposes. The purpose of FBZ is FPL validation only.
The FBZ identification is the same as the TSA / TRA identificationaround which it is established and is supplemented by the letter “z”(for example, LKTSA1Z is the FBZ for LKTSA1).
The activation time of the FBZ is identical to the activation time of therespective TSA/TRA. FBZ are AMC manageable.

# 飞行计划高度优化和Yo-Yo Flight Plan

PROF325的错误原因描述为：

Based on the sequence of requested flight levels and the subsequent profile calculation, a significant drop in altitude is followed by a significant re-climb (i.e. “yoyo”).

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# 787和777分新西兰奥克兰机场的150吨油

12月中旬，接到消息NZAA的燃油不够了，需要各个航司控制加油量。