MK-20: Need some help, boys...

[Callsign JoNay]

Can someone help me understand how to use MK-20 in the Tomcat? I don't see anything in the kneeboards for setting a burst height. How do I configure this weapon?

 

Weapon wheel: Do I choose MK20A, B, or C? (I've noticed Jester chooses C).

 

Mech fuze: Jester leaves it at Nose/Tail, but that seems to be his default setting for many weapons. In the heatblur manual it states to use nose/tail for the high drag MK-82s, but I don't see anything about MK-20.

 

Elec Fuze: Jester leaves it to INST, but the manual says to use VT.

 

 

I've tried just about every configuration of the above. My cluster casing bursts at about ~1000 MSL, and the bomblets explode at ~400 feet above the targets. None of my targets are getting destroyed or taking damage, and I don't see any dust from the ground being kicked up like in the youtube videos out there.

 

Edit: No, wait, the bomblets are making it to the ground. But the footprint is tight requiring the same accuracy I would need if I was using an MK-82.

Edited February 1, 2021 by Callsign JoNay

[Frederf]

Rockeye II are meant to be a kind of shotgun bomb being of small spread to compensate for typical inaccuracy in delivering unitary bombs. It is possible to "sprinkle" them over a wide area but the effect is greatly reduced. If you kill one BMP a single or pair that is considered a success. For a line of trucks, yeah a less dense pattern can get multiple per weapon.

 

Rockeye II have two possible fuze installations the MK 339 timed fuze and the FMU-140 radio-proximity fuze. Both are entirely mechanical, armed by arming wire. Normal operation in either fuze is accomplished by pulling the primary arming wire in which case the dispenser will dispense after the primary delay (MK 339) or at the set prox distance (FMU-140). If the secondary option wire is pulled on either fuze the dispenser will burst after the secondary arming time (MK 339) or after a set time (FMU-140). If only the option wire is pulled the weapon will dud. This may be set up as primary wire nose, option wire tail.

 

First I would check which fuze is modeled. If you drop one from 20,000 and it explodes a few seconds after release then it's a MK 339. If it explodes at the same height above terrain regardless if released at 10,000' or 30,000' then it's a FMU-140. Try dropping with N, T, and N/T fuze. T should dud. N should act normally. If N/T acts identically to N then the option wire is not modeled. If the T solenoid is connected to the option wire you should see the fuze behavior change when using N/T as opposed to N.

 

"VT" will not change the bomb behavior but it may change how the airplane predicts the bomb will travel. I recommend using the "freeze" DCS function during a dive where the computer pilot impact point is displayed. If the aimpoint shifts when changing between VT and INST then the airplane is providing different aiming and VT should be used. If the aim point is unchanged by this selection then this option can be ignored.

 

Rockeye IIs are set on the ground and can't be altered in flight except for choosing N, T, N/T, or none fuze activation upon release. I would guess that the bombs are configured as FMU-140 without option wire and set to a fixed height like 1500' or  900' or 1200'. There was a bug that F-18 CBU-99s were passing their height of function and then waiting 1.5s to burst which caused their burst to happen too low. This may also be happening with the F-14 if it is using the same weapon logic.