A guide about dive bombing that might increase your chances of survival & dive bombing accuracy.
Being a bomber plane can be difficult, more profoundly if the targets are small; from flak gun emplacements to mobile vehicles capable of shooting down airborne crafts. The chances of an AA to at least get knocked out by the small blast radius of bombs from a plane are minimal, let alone a bomber trying to approach one of them without getting detected. Most dive bomber or single propeller plane pilots skip bomb their targets, I observed. Some very few can dive bomb better. Here's a guide for those that need to know more about dive bombing.
How to Dive Bombing
The guide will have methods of how to dive bomb but demands little requirements for the methods to work accordingly (mostly effective against motionless targets). The guide will have two requirements & most importantly the three methods. Method 3. is the last & most important part of the guide, or relevant to dive bombing. Pardon my English if I have errors.
Requirement 1. Dive Bomber Plane with Airbrakes (Optional)
To perform the dive bombing method, you will need airbrakes or flaps that decrease the airspeed of your plane. It is used when you're close & approaching to the target & when you're going for the dive below it.
The airbrakes or flaps will decrease your airspeed in the dive, giving you more time to aim & less difficulty to pull up from the intense drag of the plane's airspeed & weight.
If the plane does not have airbrakes, control the engine or airspeed of your aircraft & do not throttle before & during the dive until you have pulled up.
Requirement 2. Bombs with Flaps
A clipped 2x2x4 fuel tanks that resembles a 100kg or 500kg bomb. Add flaps at the end of it. Their purpose is to stabilize the direction of where the gliding bomb is heading & will only travel downward during the dive & its release.
You might also want to add a 1x1x1 tungsten nitro tank on the bomb's tip so that the weight of your bomb will drag itself to its center of mass while falling in mid-air, more chances for your bomb to land to where it is aimed.
Method 1. Gain High Altitude
Now the important parts; the methods. Starting with gaining high altitudes, minimum being 1,200 meters from ground I suggest.
Get into higher altitude in any level as you please, as long as your plane is agile enough to pull up from the higher dives. The reason why you must gain altitude possibly more than 1,500 meters from ground is because the velocity of the AA projectiles decrease as they travel further, thus rendering their inaccuracy. You might also be less likely to get spotted, & they have no chance hearing the roaring of your engine to alert your presence.
Method 2. Approaching Target
With high altitude, it is almost impossible to spot targets on the ground from a plane. Have a camera in your plane's cockpit. It shall serve as a scope for the plane's guns & bomb, but most importantly will act as the binoculars of a pilot to see things from great distances a little better (zoom-in in the camera & look around while holding right mouse button).
Okay, approach your target in high altitude. Slow the plane down when you're close to it while maintaining around 200 km/h of airspeed. Make sure to only dive when it's very close & below you from the high altitude.
Method 3. Dive Bombing
With the AA below you, assuming they will reach their maximum arc of fire, you are invulnerable from its AA fire.
Never throttle the engine. With airbrakes or slow airspeed, roll your plane 180° to either side while letting gravity drag you down, & finally perform the dive. Then, aim your bomb with the spinner, or the tip of the propeller of your plane through your camera. Then, drop the bomb to your aiming target, pull up, & throttle your plane out of the place.
The sequences of pictures below shows how the 180° roll is done, following the dive.
I hope you find this anyway useful or gives you any ideas.