Incorrect Aim7F/M motor thrust

[KiubekPL]

The Aim7F/M we have in dcs produces ~137 922N total which equals to roughly 31000lbf total, at 20000 feet.

The documents i provided, claim that it produces 30.649lbf total, at sea level, which when you consider that, it makes the dcs motor severly underpowered compared to real life figures. (motor performs a fair bit better at higher alt so those figures being almost equal means that it is actually severly underperforming)

 

 

Additionally our missile has a burn time of 3.7sec for the boost phase and 10.8sec for the sustainer phase which is incorrect based on most sources (there are more sources claiming the opposite than there are claiming for it).

Both sources i linked bellow claim that it has 4.5sec boost phase and 11.0sec sustainer phase.

 

sources:

https://web.archive.org/web/20111014175637/http://alternatewars.com/SAC/AIM-7F_Sparrow_III_SMC_-_January_1977.pdf

https://web.archive.org/web/20111014204849/http://alternatewars.com/SAC/AIM-7F_Sparrow_CS_-_January_1976.pdf

[AKarhu]

That figure of 30,649 is not the thrust force but the total impulse, as it says (though with weirdly written units). Thrust is given, rather clearly, as 5750 lb for 4.5 seconds during boost and 1018 lb for 11.0 seconds during sustain. (To sanity check, calculating total impulse from those idealized constant figures would result in 37,000 lbf-s, which is in the ballbark with the document.)

[KiubekPL]

1 hour ago, AKarhu said:

That figure of 30,649 is not the thrust force but the total impulse, as it says (though with weirdly written units). Thrust is given, rather clearly, as 5750 lb for 4.5 seconds during boost and 1018 lb for 11.0 seconds during sustain. (To sanity check, calculating total impulse from those idealized constant figures would result in 37,000 lbf-s, which is in the ballbark with the document.)

Yea, i don't think i said it is thrust, i simply said it was "total" as that is the total impulse it produces.

[AKarhu]

Well, my assumption rose as you wrote specifically in units of lbf and newtons, both units of force. (Units for total impulse would be lbf⋅s or N⋅s, though the document reads rather questionably "lb/sec".) Anyways, let that be my mistake.

[Tholozor]

An older discussion regarding this can be found here: