Hi Itkovian, welcome to BOBII and the BOBII forum and community. We have many IL2 players who enjoy BOBII as well. The two sim are different as you might expect and we do approach and model things differently. remember that the BOB only covered a short period in the history of air war in WWII (about 90 days or so) and you will be flying and fighting only BOBII A/C and using the 1939 tech.
1- While flying an IA mission in a spit (mk1A I believe), I get a strange sputtering from the engine especially at max throttle. Basically the engine sound cuts off for an instant, and the pilot's "head" is pushed foward as if there was a moment of deceleration (it's not the sound cutting off, as there is an accompanying visual effect).
Is this an accurate simulation of how the merlin behaves at max throttle or some such, or a bug/computer issue?
I think you are just pointing the nose of the RAF fighter (Spit or HUrri) down. In the BOB the RAF A/C had negitive-G carbs and they would cut out if pointed down. Many RAF pilots would flip upside down before attacking to avoid the issue.
2- Sounds in general seem to be more "rarefied" in the cockpit than IL-2. For example, very rarely will I hear machine gun fire, or nearby aircraft engines (and as far as I can tell, all I hear is the sound of the engine zooming past).
Is that normal? A more realistic simulation of sounds a pilot might hear in a dogfight? Especialy unsettling was not hearing guns being fired at me at all, except when they hit me. Is that intentional?
The sim trys to simulate the sounds that the BOB pilots would actually hear but as always this is subject to debate.
You may not always hear the enemy's bullets fire but you should hear the bullet hit your A/C and see the tracers when there is a miss.
3- There is this strange visual effect that happens sometimes when I get hit, where the screen basically goes crazy, with double/triple images and graphical clipping appearing everywhere and I lose all control.
Is this the pilot injury effect? And is that how it is meant to show? I can't help but think that could be a graphics issue (especially the clipping).
I think (again a guess) you are discribing a simulation of a rudder being hit and the rudder failing but that is just a guess based on my experience. It is said that the inside of the cockpit becomes very "violent" after a rudder has failed with the pilot being penned in and confused.
I guess we would need a screen shot to confirm for sure.
4- Is it just me, or is gunnery specifically more difficult in this sim than in IL-2? Target size is set to low, but I imagine that is not any different from IL-2, but I am having more difficulty landing a hit than IL-2. It's as if the rate of fire on the brownings is slower.
We think we have modelled the bullets per the specs (In BOBII we use the specs to model). The 303's will shoot per the specs very closely. Most IL2 players find deflection shooting different in BOBII and maybe even a bit harder. Most kills in the BOB were made by LUF and RAF pilots within 20 degrees of the 6 O'clock position as deflection shooting so so difficult for many of the pilots (this is from Stephen Bungay's "The Most Dangerous Enemy" which is the historic Bible for many of us around here).
Of course the 303's danage effects will be less than the 50 cal and cannon damage you may be use too but as history showed the 303's did get the job done in the hands of a experienced pilot..
If you have not found the User Manual (located in your BOBII folder in the Docs folder) please review it to understand how to control the game with its many options, keys, and features. The Key discriptions are in appendix H and the Bdg.txt parameters are in appendix A.