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Old 09-24-2019, 01:16 PM   #11
-P51DMustang-
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Well really interesting loopack. Since PL5E II are something around AIM9M... And HMD is available in hornet with those sidewinders (minus a really tinier angle of shot something 40 degrés each aide) its still nice to use in dogfight to gain those few degres corner speed dont allow u to take.
But as in real life this situation occur only few time, there may be no need. But does that mean JF17 Block III will receive new fox2... Mmmhh lets wait and see. Maybe they add J10/J20 HMD only for all other uses (including BVR, Bore mod, A/G HMD support)
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Old 09-24-2019, 01:24 PM   #12
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Hi! Do we have some sort of block fuel calculator like the FPAS in the Hornet, computing optimum Mach/altitude, max range at current speed/alt, etc?
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Old 09-24-2019, 04:22 PM   #13
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The JF-17 doesn't have any fuel flow indication unfortunately. It does have a FPAS-alike page though, but will be included later in the early access process.

With 3 external tanks + 2 PL5E when doing a 0.8 mach cruise at 36000ft, FF can be as low as 1830lbs/h. But if you consider a whole climb, cruise and descend process, the total ferry range can reach 3500km.

At sea level @ 1.0 mach with full AB in combat mode (engine work mode), FF is around 57000lbs/h.
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Old 09-25-2019, 11:08 AM   #14
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There is only one engine.
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Old 09-25-2019, 11:32 AM   #15
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Nice to hear it has a higher Q limit than the MiG-21, being able to go supersonic at low altitudes. Shame about now fuel flow indication. I’m sure we won’t run out of things to put on all that glass
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Old 09-25-2019, 06:04 PM   #16
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Quote:
Originally Posted by Beamscanner View Post
the 1100 liter drop tanks carry about 3300 lbs right?

if so, combat load (2x 1100 tanks, 2x PL5E, 4x SD-10, 1x Jammer pod) allows about ~11,800lbs of total fuel.


assuming average FF between 15,000 - 25,000lbs/h per engine, that gives a flight time of roughly 14-24 minutes.

Add another 2400 lbs if you switch the Jammer out with the 800 litter center tank.. adds another 3-5 minutes of flight time (assuming an average FF of 15 to 25k lbs/h)
I think the weight per liter for fuel in your calculation needs checking. Total aircraft weight for fuel is approximately 10,300lbs. 3000 liters internally, 3000 liters externally. ~5150lbs of fuel internally, so fuel weight per liter is 1.71 lb per liter. Obviously, my used data could be wrong, should only be taken as approximate.

Sources :
https://en.wikipedia.org/wiki/CAC/PAC_JF-17_Thunder
https://www.airforce-technology.com/...longjf17thund/
https://defence.pk/pdf/threads/jf-17...ranges.462726/
https://quwa.org/2017/08/31/profile-...jf-17-thunder/

Last edited by ShadowFrost; 09-25-2019 at 06:17 PM.
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Old 09-26-2019, 06:38 AM   #17
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Quote:
Originally Posted by spiddx View Post
There is only one engine.
HAHA I never really looked at the back. thanks!

Quote:
Originally Posted by ShadowFrost View Post
I think the weight per liter for fuel in your calculation needs checking. Total aircraft weight for fuel is approximately 10,300lbs. 3000 liters internally, 3000 liters externally. ~5150lbs of fuel internally, so fuel weight per liter is 1.71 lb per liter. Obviously, my used data could be wrong, should only be taken as approximate.
Yeah, I didn't see the total internal fuel on that page.

I made my estimates on liters (of jet fuel) to lbs using F/A-18 data.

https://en.wikipedia.org/wiki/McDonn..._F/A-18_Hornet

"3× under-fuselage with a capacity of 13,700 lb (6,200 kg) external fuel"

"up to 3× 330 US gallons (1,200 l; 270 imp gal) Sargent Fletcher FPU-8/A drop tanks"

13,700/3 tanks = 4567 lbs

4567 lbs / 330 gallons = 13.8 lbs per gallon

13.8 / 3.78 = 3.65 lbs per liter

1100 liter fuel tank x 3.65 lbs = 4015 lbs fuel per tank

Not sure where I went wrong. But if the total fuel is 10,300 something I did botched up everything. maybe Wikipedia messed up on the 13,700 lbs from 3 tanks quote.

Last edited by Beamscanner; 09-26-2019 at 06:46 AM.
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Old 09-26-2019, 07:08 AM   #18
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Quote:
Originally Posted by Beamscanner View Post

Yeah, I didn't see the total internal fuel on that page.

I made my estimates on liters (of jet fuel) to lbs using F/A-18 data.

https://en.wikipedia.org/wiki/McDonn..._F/A-18_Hornet

"3× under-fuselage with a capacity of 13,700 lb (6,200 kg) external fuel"

"up to 3× 330 US gallons (1,200 l; 270 imp gal) Sargent Fletcher FPU-8/A drop tanks"

13,700/3 tanks = 4567 lbs

4567 lbs / 330 gallons = 13.8 lbs per gallon

13.8 / 3.78 = 3.65 lbs per liter

1100 liter fuel tank x 3.65 lbs = 4015 lbs fuel per tank

Not sure where I went wrong. But if the total fuel is 10,300 something I did botched up everything. maybe Wikipedia messed up on the 13,700 lbs from 3 tanks quote.
Always a chance my sources are wrong, but the fuels can have different densities but I imagine even with that it wouldn't make for that sort of margin of error. So I don't know, maybe the fuel density on wiki is wrong for the F/A-18?
Either way, in regards to JF-17, your not working with as much fuel as you first imagined AFAIK
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Old 09-26-2019, 08:01 AM   #19
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Quote:
Originally Posted by ShadowFrost View Post
Always a chance my sources are wrong, but the fuels can have different densities but I imagine even with that it wouldn't make for that sort of margin of error. So I don't know, maybe the fuel density on wiki is wrong for the F/A-18?
Either way, in regards to JF-17, your not working with as much fuel as you first imagined AFAIK
Well I also thought there was 2 engines, so that whole post was jacked up
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Old 09-26-2019, 04:14 PM   #20
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Hey you would’ve been close if calculating for FC-31! Though I don’t think we know it’s internal fuel yet

Last edited by AeriaGloria; 09-27-2019 at 01:23 AM.
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