No joy. Did a couple tests at 200m/280kph and bombs come up short. Need to either bump up the elevations or the speeds to make the sight work.

Edit: Hi, yes. I understand them to be bombing angles for level bombing. Just need to find the TAS/elevation combinations for each angle to make it work.

Edit II: Managed to score EAD tank with the 200 meter bombing angle. Throttle at 110%. IAS around 330-350 kph. Was using 250kg and full tank gas. Target tank was at sea level. That bottom angle is a little distorted with 2DOF, so you have to take that into account.

No, it's not-the problem would be trying to implement something that had innumerable variations IRL.

The problem is that I was dropping bombs short when going 300 kph.

EDIT: I see you've reached that conclusion too.

The targets were at sea level, yes.

Yes. However each of those plates is pretty long, so the distortion is quite small. You can "correct" for it: If you press shift+F1, the lowest plate lines up perfectly, but is now off-center. Pause the game. You can see where it indicates on the terrain (a tree for instance). Going back to normal view you can see that the same tree/object is now just on top of the windscreen frame.

So, rather than dropping where the distorted 4th angle indicates, I've been dropping when the targets disappear under my nose.

Even so, the bombs fly far short.

I can hit targets at 100 meters only by dropping in an area between the 3rd and 4th indicators.

At 50 meters, the second indicator works perfectly.

Along the nice authentic manual of HS129, there is also a great book to read about HS129. It is 'HS129 Panzerjager!' by Martin Pegg published from Classic Publications.

In the Page 50, I found some useful information on the gunsight & vanes.

'This consisted of a Revi C12/C or C12/D sight, on the side of which was mounted a crude form of bombsight comprising four horizontal vanes with vertical wires passing through them. Release heights of 10, 50, 100 or 200m(33, 164, 328, 656 ft) were marked on the vanes and the pilot aimed his bombs by aligning the target with the particular vane appropriate for release altitude.'

That's all and there is no related picture or description with it. So it's a bit confusing. Which vane is for 10m? Is that top for 10m or the bottom one is for 10m? Well I don't know.
:)

top vane -> 10m
bottom vane -> 200m

I believe that they are supposed to be incendiaries?

It would be nice to see incendiary effects improved in 4.10 (eg. The napalm effect of the M-13)

really? that seems counter-intuitive to me, but will give it a pop.