Amigator
FULL MEMBER
- Joined
- Oct 13, 2017
- Messages
- 496
- Reaction score
- -1
- Country
- Location
IAF said that Tejas endurance is 59 mins only. Suppose they are assuming it in clean mode (without external fuel tanks). At 2011 French Air show in PAF Thunder presentation it's mentioned that JFT's endurance is 3.5 hrs.
Suppose it's with external drop tanks. Then a JFT's endurance in different conditions would be:
(Note: JFT has two types of Side Drop tanks. One variant can accommodate 800 ltr. & other 1100 ltr. I am supposing that above mentioned endurance is calculated with full capacity i.e. Internal Fuel + (2 * 1100 ltr. external side tank) + (1 * 800 ltr. center line tank)).
1) Internal Fuel + 1 drop tank of 800 ltr. + 2 drop tank of 1100 ltr
2320 kg internal + (818 kg * 1) + (1091 * 2) = 2320 + 818 + 2182 = 5320 KG => 3.5 hrs.
2) Internal Fuel + 1 drop tank of 800 ltr. + 2 drop tank of 800 ltr
2320 kg internal + (818 kg * 1) + (818 * 2) = 2320 + 818 + 1636 = 4774 KG => 3.14 hrs.
3) Internal Fuel + 2 drop tank of 1100 ltr (Just Side Fuel Tanks)
2320 kg internal + 1091 * 2 = 2320 + 2182 = 4502 KG => 2.96 hrs.
4) Internal Fuel + 2 drop tank of 800 ltr (Just Side Fuel Tanks)
2320 kg internal + 818 * 2 = 2320 + 1636 = 3956 KG => 2.60 hrs.
5) Internal Fuel + 1 drop tank of 800 ltr (Just Center Fuel Tanks)
2320 kg internal + 818 = = 3956 KG => 2.06 hrs.
6) Only Internal Fuel
2320 kg => 1.52 hrs.
According to these calculations JFT endurance is not bad at all. But Tejas 59 mins are bad!!!
Suppose it's with external drop tanks. Then a JFT's endurance in different conditions would be:
(Note: JFT has two types of Side Drop tanks. One variant can accommodate 800 ltr. & other 1100 ltr. I am supposing that above mentioned endurance is calculated with full capacity i.e. Internal Fuel + (2 * 1100 ltr. external side tank) + (1 * 800 ltr. center line tank)).
1) Internal Fuel + 1 drop tank of 800 ltr. + 2 drop tank of 1100 ltr
2320 kg internal + (818 kg * 1) + (1091 * 2) = 2320 + 818 + 2182 = 5320 KG => 3.5 hrs.
2) Internal Fuel + 1 drop tank of 800 ltr. + 2 drop tank of 800 ltr
2320 kg internal + (818 kg * 1) + (818 * 2) = 2320 + 818 + 1636 = 4774 KG => 3.14 hrs.
3) Internal Fuel + 2 drop tank of 1100 ltr (Just Side Fuel Tanks)
2320 kg internal + 1091 * 2 = 2320 + 2182 = 4502 KG => 2.96 hrs.
4) Internal Fuel + 2 drop tank of 800 ltr (Just Side Fuel Tanks)
2320 kg internal + 818 * 2 = 2320 + 1636 = 3956 KG => 2.60 hrs.
5) Internal Fuel + 1 drop tank of 800 ltr (Just Center Fuel Tanks)
2320 kg internal + 818 = = 3956 KG => 2.06 hrs.
6) Only Internal Fuel
2320 kg => 1.52 hrs.
According to these calculations JFT endurance is not bad at all. But Tejas 59 mins are bad!!!