I know, its a reverse engineered aim54 seeker on a hawk motor.
Fakour 300kg of fuel and 340kg of dry missile weight.
AIM-174 from available data 360kg of fuel and 500kg dry missile.
So 174 has a bit less delta, but kinetic energy is higher because mV²/2.
Are they the same propellant?
Nope. 235s vs 265s specific impulse.
Yeah I’ve been looking into this and it seems the propellant is the cause of the difference. The mim23 has a 9 foot motor that burns for roughly 25-32 second burn time. Thrust should be around 13.00 kN. The MK 104. has a length of roughly 9.5 feet. Idk burn time so i cant calculate thrust.
Also idk where you got this from but, the fakour weighs 450kg, with roughly 400kg of that being fuel and motor housing, unfueled the booster alone weighs roughly 111kg. So you’re looking at roughly 161 kilos of dry weight. The problem is the propellant is far less efficient as well as the fakour having more drag due to larger missile diameter.
Afaik delta V calculates drag against thrust and wieght. So the increased drag of fakour plus the longer motor, better propellant, and thinner diameter of the MK 104 means to me that while we don’t have numbers to run calculations for the aim174b, I am quite convinced the Aim17b will have considerably more delta v. This is also evident in the fact that hawk is a mach 2-2.5 missile, where as the Aim174b is a mach 3.5 missile.
WT wiki and gszabi table give around 640kg weight
Delta V uses tsiolkovsky formula. V= specific impulse x ln(full mass/dry mass)
So it doesn’t account for drag then.
Yes.
Maybe it does, i’ll keep looking, but i think that’s the weight of a hawk missile. not the fakour necessarily. Though idk why it would weigh so much less being essentially a modified hawk.
The weights i was using were for the rim23a, rim23b has a bigger motor. i apologize.
Im still convinced aim174b has more delta v due to longer motor and better propellant. though im not sure by how much exactly.
Calculation show that it has 20m/s less delta v. External factors like drag and launch speed are applied during flight and change. Delta v for vacuum is always the same