How much is actual question for which you likely won’t find info without entering sekrit dokuments territory.
Gaijin already assumed those 4kg extra translated to 3.75kg of propellant more. You might get more out of the missile by convincing Gaijin to reduce air drag, after all AMRAAMs are one of the best long range missiles despite one of the weaker motors for their weight.
Funnily enough, it only has ~5% more thrust in game
Dual pulse motors aren’t about increasing thrust, just applying second kick when it should help.
Yes but
ER empty weight is currently 75kg with 47kg of propellant, however SR has an empty weight of 74.75kg with 42kg of propellant… Yet the ER only has 5% more thrust despite having ~10% more propellant, which I assume is also far more efficient than the one on the SR
Also there’s no actual info that the ER’s empty weight isn’t actually less than the SR
Also, if it has the same propellant effectiveness, how would it reach 2x the range from a static ground launch?
Total thrust of ER is about 10% extra though?
Derpy ER:
first pulse thrust: 18800N
first pulse burn: 4s
second pulse thrust: 17625N
second pulse burn: 2s
18800*4+17625*2=110450
110450 divided by 47(kg of propellant) gives us exactly 2350N/kg
Regular Derpy has 101661,2N, divided by 43,25 results in 2350,55N/kg rounded
110450/101661=1,086, or 8,6% more thrust, while propellant (47/43,25) mass increases by the same 8.6% unless you go really deep into thousandths for accuracy.
Now, I have absolute suck all of missile/propellant knowledge, so asked some AIs and while “N/kg” isn’t valid unit, but “N*s/kg” is bit more usable. And known air to air missile propellants supposedly land around 2400N*s/kg mark, without entering powdered unicorns territory. So trying so squeeze more juice out of that hebrew lemon might be about as difficult, as from WPU-16B motors used in C5 onwards AMRAAMs - ie it won’t happen.
I see forum formatting doesn’t like * used out of context. Solved it?
i probably messed up my maths then
You can also check it directly in the missile spreadsheet. Both SR and ER have about a 240s specific impulse (similar as Ns/kg but normalized with the weight of the propellant instead of the mass) for either booster or sustainer.
Last time I’ve looked into missile sheet it was lacking Derpy ER.
:c Community Bug Reporting System
I am really disappointed that we aren’t getting the Derby ER on aircraft even though it only features a marginal performance improvement over the regular variant
It would’ve been such a cool gimmick but I guess we can’t have any nice things
We have absolutely nothing on it using different propellants iirc, just stages. The increased efficiency comes from the stages self managed usage
I’m aware, double is stated for both ground and air. Interestingly when it comes to MR equipped missiles it only increases ranges by 20km, it doesn’t go up beyond that there strangely
Are we sure in this being a thing or is it a prediction
350m/s, my bad
Aim120B, Aim-120C-5, Aim-120C-7, Aim-120C-8. Possibly D variants as well but these are the variants I’m aware of the IAF equipping
To me it’s just a huge NO! If such aircraft never ever tested or used a certain type of weapon then it should not have it in the game. Giving ahistorical loadout isn’t a solution especially if it’s for balance purpose.
I am among those wanting historical loadouts for aircrafts, not fictional ones
Except it was. The F-16I has the capability to carry almost if not everything airborne Israel has (that can be put on it ofc).
Considering the Barak can carry them, the Sufa can guaranteed too.
This is also without even bringing up the “compatibility” thing, which just makes the chances even higher.
Anyway, yea it would be a good addition once the 120D, PL-12A, MICA and such are fully fixed too.
in that case… It should have them. gonna change my vote so. And thanks for your info. always glad when someone can reply with facts!
I think this thing will be happened if they give the Upgraded F16I with aesa radar then bring I Derby ER cause now F16I is don’t have aesa
That’s an F-16D (thus I made Giving the F-16D its I-Derby ER )
As it currently stands, the Derby ER only offers a marginal improvement over the regular derby so it still wouldn’t be able to compete with top tier missiles
i think that is a sign for me to go to sleep
The problem is that we still don’t have anything explicitly stating the Sufa in particular is compatible with the Derby series. Not even all the Baraks are presumed compatible, since only Block 30 testbeds loaned to Rafael mounted and tested them (which is enough for them to be added to the game, as if a single in service example is modified or tests a weapon, the vehicle ingame meant to represent all examples of this vehicle as a whole can get them, hence the tested centerline Aim-9D for the Shahak report). Sadly we don’t have that luxury for the Sufa, and given past report denials we’ll need it for this as the devs are being a bit of a stickler about it
Now we might be able to get something out of this if we can compile a proper report based on the “compatible with everything” thing and if the Derby is apart the IAFs arsenal, but I’m not sure about the latter part
