Author Topic: Horiz. vs. Vert. Convergence (Read 375 times)

XrightyX · « **on:** March 25, 2005, 11:54:23 AM »

Sorry if this goes over old, familiar ground...I'm too lazy to look it up.

In AH2 does convergence in the hanger set both horizontal and vertical convergence?

JB73 · « **Reply #1 on:** March 25, 2005, 12:06:23 PM »

IIRC yes it does, but they are not individual things you can set seperately

Cobra412 · « **Reply #2 on:** March 25, 2005, 02:55:36 PM »

Convergence and harmonization is set automatically when you select your convergence range.

MANDO · « **Reply #3 on:** March 25, 2005, 06:44:46 PM »

Currently, harmonization is set at convergence point, that is, where your bullets will cross the sight center going down. It would be good to be able to set conv and harmonization separatelly.

Cobra412 · « **Reply #4 on:** March 25, 2005, 07:22:02 PM »

How exactly do you plan on doing them seperately and what affects do you plan on getting of of such a setup?

MANDO · « **Reply #5 on:** March 25, 2005, 07:39:18 PM »

Real 190A5, for example:

all weapons harmonized to 400m, MGFF with convergence at 200m, Mg151/20 with convergence at 300m and both Mg17 firing in paralel.

For 190A8:

All 151/20 harmonized to 550m, MG 131 at 400m firing in paralel.
Inner set of 151/20 with convergence at 600m, outer 151/20 with convergence at 400m.

XrightyX · « **Reply #6 on:** March 25, 2005, 08:06:35 PM »

Okay, so there is convergence and harmonization, right?

So my question now is...does it change with altitude?

In real life, it would. Guns have different muzzle velocities and the rounds have different radii, so the ballistics will change with altitude and the subsequent change in air density. It doesn't matter for a plane that has all of the same guns, but with LW planes (30 mm especially) it would matter.

Unless I'm way off here. Gonna sit down with my old physics book tonight and try to work out the equations.

Is this modeled in AH? If not, what is the magic altitude at which guns have harmonization and convergence that is carried to all alts?

Cobra412 · « **Reply #7 on:** March 25, 2005, 08:28:29 PM »

I've got the graph for the 190 A8 R1.

The convergence and harmonization was suppose to have been adjusted by HTC if I remember correctly.

I think the problem is we adjust our convergence settings in AH2 differently than how the planes were done originally. Granted I'm sure they could be changed but it seems the maintenance manuals call out for for specific boresighting procedures.

Instead of being able to converge our rounds at anything we would like now on the A8 they were converged and harmonized at a specific ranges per the maintenance manuals. Unless someone else can come up with some documentation that says the guns were constantly boresighted differently depending on a type of mission then this shouldn't be able to be changed in the first place. The guns should all be set to what the manuals state they were suppose to be set to and there should be no deviation.

This is no different than how I do my boresighting on the LANTRIN Targeting Pods for the F-15E. It's also no different than how I boresight the HUDs, and INS mounts. They have specific tolerances that have to be met. The gun on the F-15 is the same. It's set to a specific range and left that way.

If they were constantly changed then later on when lead computing systems came out the computers would have to be altered everytime you changed the convergence on the aircraft. The new boresight values have to be input in order for the system to properly adjust the lead computing.