Official Fulqrum Publishing forum - Friday Official Update, July 20, 2012

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Well, that's the plan more or less: if we have an incentive to go up there in force it will be better gameplay for everyone ;)

A few days ago i was dive bombing in a Ju88 and had a human gunner. I was dodging a Spit all the way home as best as i could and the player manning the guns was doing a very good job, so we managed to reach home base with only light damage.

The only serious damage what that the hydraulic pump got shot off, so we couldn't extend gear and flaps. I had to side-slip it in to control speed by drag and executed a belly landing.

One of the best sorties i ever had, my gunner was going "wow, look at that" on the chat as he watched the string of bombs explode during the pull up, all sorts of fun, immersive things, and then it hit me. I was excited just getting a mission with the kind of outcome many bombers had in the real battle.

Just imagine how much better it's going to be and how hectic, if we have 5-10 player controlled bombers level bombing from altitude, 110s for top cover trying to BnZ the RAF, Hurricanes trying to force the 110s to TnB, 109s trying to cover the 110s and Spits trying to tie up the 109s. Or spawning in Manston and taking off as the bombs go off around you, aimed by real people who will see you taxing through their scope and try to get you, instead of AI bombers that hit a predetermined spot. It's going to be madness i tell you :-P

Terminal Velocities

Quote:

Originally Posted by Wolf_Rider (Post 447685)

Determine the weight of the falling object. The easiest way to do this is usually to measure this quantity directly. You can also estimate weight if you know the construction materials and dimensions.

2
Calculate the frontal area of the falling object. The frontal area is the apparent area facing in the direction of falling. You can determine this area by measuring the outline of the object from that orientation. For example, if the falling object were a cone, the tip of the cone would point straight downward, and the frontal area would appear to be a circle equal to the area of the circular base of the cone.

3
Determine the drag coefficient of the falling object. You can usually avoid having to calculate the drag coefficient yourself by looking up an approximate value in a reference book or on the Internet. If you need a highly precise value, you should consult with an engineer.

4
Determine the gas density of the medium through which the object will be falling. If the medium is the air, then you should know that air density decreases with altitude, which means that the object's terminal velocity will decrease as it gets closer to the ground (where the gas is denser and pushes back harder, providing stronger braking power). Thus you can calculate terminal velocity at any one altitude using simple mathematics, but to calculate the change in the terminal velocity over a long-distance fall, you will require the use of calculus or empirical approximations. Air density also changes with the weather; there is no uniform density value for a given altitude. To get the most accurate measurements of air density, you will need to multiply average air density values by local weather condition offsets. Atmospheric information is available in the United States from the National Weather Service, a service of the National Oceanic and Atmospheric Administration.

5
Calculate terminal velocity at a given altitude with this equation: Terminal V = sqrt ((2 x (Object Weight)) / ((Frontal Area) x (Drag Coeff.) x (Gas Density))).

In plain English, the terminal velocity of the object is equal to the square root of the quotient of twice the object's weight over the product of the object's frontal area, its drag coefficient, and the gas density of the medium through which the object is falling.

Read more: How to Calculate Terminal Velocity | eHow.com http://www.ehow.com/how_6134922_calc...#ixzz21SPSlnUQ

Thanks for this very interesting item - I haven't looked at the article yet, but you might need to consider a few more variables before identifying a value for Cd for the bomb.

1. Bombing altitude. If you are bombing below the height needed to attain terminal velocity, the bomb won't attain it, and the Cd value will need to be computed from a theoretical velocity.

2. The Cd of falling objects will generally increase to a point where the object has shock waves generated from it at near-sonic bomb velocities. As the bomb goes sonic/trans-sonic the Cd will probably drop slightly.

3. The Germans did an awful lot of aerodynamic research during the war, and I would be surprised if the likes of Schlichting et al did not provide a pretty comprehensive Cd-Velocity envelope for specific bombs, or a more generic CD-velocity profile for use in general calculations?

4. My own interest in this has been from determining the theoretical 'effective' range of WW2 aircraft cannon/mg, in which the highest velocity (and drag) is established at the muzzle and thereafter decays through sub-sonic drag. For my calculations, I found a very interesting article on the net by a team of Indian researchers who managed to investigate and tabulate the trans & sub-sonic CD values of a fired test cannon shell. I appreciate that the bomb is probably more aerodynamic than the shell, but the CD - Velocity characteristic will be similar.

5. Air density - or static pressure - is generally a function of altitiude but of course changes due to atmospheric conditions. If my memory serves, air density can be calculated from P/RT where P is the pressure at altitude (which will vary as the bomb descends), the gas constant R for air and the absolute temperature. No-one can predict precise values from the (discomfort) of a bomb-sight, but these values should be reasonably accurate.

Hopefully I can now take off my annorak, as it's getting rather warm in the UK ;-)

Marx

Quote:

Originally Posted by MD_Marx (Post 447738)

As the bomb goes sonic/trans-sonic the Cd will probably drop slightly.

[...]

my annorak, as it's getting rather warm in the UK ;-)

Marx

Wait wait... transonic drag is much higher than subsonic. This why it is called the Mach wall.

Quote:

Originally Posted by MD_Marx (Post 447738)

Though I didn't write that up, it does suggest that the calculations required are not a simple feat

and I guess that's why (the yanks, at least, in the later stages and the PTO) went back to iron sight "guestimating" , dive and skip bombing for low level raids?

Yeah, that's me, flying on a wing .. ready to stall. :grin:

http://forum.1cpublishing.eu/attachm...0&d=1342791429

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Hi

Do we have a new patch in this week so .... ?

Quote:

Originally Posted by BlackSix (Post 446828)

Hello gentlemen!

We’re virtually done with the move and are back to work. The new iteration of the patch is due next week! Sorry, couldn’t push it out today...

^^ posted July 20th, 2012.
So it's been a week, did a unicorn come down & deliver this magical patch while I was in the kitchen making a samich or somethin?