※ 引述《SIG552 (本槍價值參仟伍佰元整...)》之銘言：
: r大說對了，野馬長航程的秘密就在內載燃油的容量。以早期的NA-73X原型機為例，其內
: 載燃油量就有180美制加侖，據稱是噴火的兩倍以上。到了設計P-51B時，又在座艙後方另
: 外加裝了一具85美制加侖的油箱，再加上兩具77加侖的外掛副油箱，燃油總攜帶量達到
: 419加侖，更不用說燃油總攜帶量高達489美制加侖的P-51D...
: 相對的，噴火系列的內載燃油量就少得很多。再以使用類似引擎的噴火Mk.Ⅸ/ⅩⅥ為例，
: 其內載燃油容量為一具57美制加侖的機身油箱及兩具共44美制加侖的翼內油箱，合計101
: 加侖，比噴火Mk.Ⅴ之前的機種好，但仍不如P-51B的265加侖。正因為燃油攜帶量的差異，
: 很自然的野馬的航程會比噴火來的遠。
無意中翻到一個網頁：
http://www.cyberessays.com/History/79.htm
Effects of the P-51 in World War II
This final Mustang design was superior to anything else that
flew at the time. The P-51B had a huge internal gasoline tank capacity
(around 425 gallons) and its engine was very economical, using about
half the gasoline of other American fighters. This meant its range was
1080 miles and could be extended to 2600 miles when extra drop-tanks
were attached to the wings. This made its range far more than any
Allied or German fighter's.
看來也跟RR的引擎有關
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