Post by oldpop2000 on Aug 21, 2020 19:54:35 GMT -5
A TBF has two combat loads, as an example, the torpedo normal and the torpedo overload. What is the difference, the fuel and oil load. In the former, the fuel load is 199 gallons in the center and outboard tanks. In the over load, the fuel load is 301 gallons and the oil load is 17 versus 13. But the real difference is the fuel load.
In the bomber mode, it only has one load-out and that is full fuel and oil, plus 1 x 1000 lbs. bomb.
Now this is just an example. The Kate torpedo bomber most likely has the same weight configuration. One torpedo but two difference fuel and oil loads.
All aircraft have three weight configurations: empty, combat and full. Empty means no fuel, ammunition and ordnance. The combat weight depends on the type of aircraft, the mission and of course ordnance requirements.
For a dive bomber, there could be as many as five bomber configurations and if it is like the SBD, two scout configurations. The scout configuration always had either the same or more fuel load using external tanks. Again, if you want more ordnance, something has to suffer, its usually range.
A fighter can have a fighter configuration either with no external tanks or two maybe even one under the fuselage. If it is going to perform a fighter bomber mission, then it will be configured with a bomb maybe a 1000 lbs. bomb and two external fuel tanks.
The final configuration maximum configuration and I think this is self explanatory. It is the maximum amount of fuel, ammunition and ordnance the plane can carry and still get off of the deck. Now, if the plane is stationed on an island base with and airfield, this can be changed a bit because it will have a long take-off run.
As one can see, this can be very complex. The air operations officer, the fleet admiral and captain with the staff after receiving the scouting report now has to determine range to target and this will dictate the fuel load and that will affect the ordnance load. It can also affect the fleet movements. At Midway, after the confirmation of the Japanese carriers, Spruance turned the Enterprise and Hornet toward the enemy fleet, and raced to meet it. Why? To decrease the range and improve the recovery chances. Fuel load and ordnance load had to be balanced. The key is range which is fuel load. Avgas, BTW, weighs 6 lbs. per gallon. So, if I have 300 gallons total, that is 1800 lbs.
A Yorktown class carrier could carry about 178,000 gallons. If you had 90 aircraft with 300 gallon tanks, that's about 27,000 gallons for air strike. That is 6.5 full strikes and its time tor refuel at sea. The Japanese carrier Kaga stored 154,000 gallons of avgas, Akagi 150,000, while Hiryu and Soryu each carried 134,000 and Zuikaku 150,000 gallons. The later Unryu class had their storage slashed to 48,000 gallons, as it was understood that a carrier or its planes was not likely to live long enough to use much more. The US carrier Lexington carried 132,000 gallons while Enterprise had an avgas stock of 178,000 gallons. The newer Essex carried more, about 240,000 gallons, while the Independence carried 122,000 gallons. The British carrier Illustrious had an avgas stock of 50,540 imperial gallons, Indomitable had more at 75,000, and Implacable carried 94,650. The relatively modest avgas capacity of RN carriers reflects not only that they were intended to operate fewer aircraft but also that they had better access to bases. It was a clear inconvenience late in the war when more and thirstier aircraft were operated. Carrier-borne aircraft had a fuel capacity of 150–300 gallons. There was then avgas for about 10 sorties per plane before replenishment was necessary (with 5–7 sorties typical for late-war RN carriers).
Last Edit: Aug 22, 2020 8:51:28 GMT -5 by oldpop2000