Thread: True Altitude?
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Old 12-07-2013, 12:54 PM
FrankB FrankB is offline
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Join Date: Feb 2010
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Quote:
Originally Posted by Soldier_Fortune View Post
The formula I've posted has given you a TAS = 367 km/h, right?
I've calculated TAS = 340 km/h with an E6-B, and I confirmed this result with an app for Android which I have.
Right.

Quote:
Originally Posted by Soldier_Fortune View Post
- Air density at bombing altitude:

AD = 0.0036*[P/(Tmap-0.0065*ALT)]
While your formula works ingame, this does not seem to compute the correct density according to the ISA tables (at 11000m it should be 22632 Pa), so I used the source formula

AD = (P*M)/[R*(Tmap-0.0065*ALT)]

where R and M is universal gas constant and molar mass of dry air and that gives me the constant 0,00348, giving same results as ISA tables.

Quote:
Originally Posted by Soldier_Fortune View Post
Please: test these equations, and let me know how they work for you.
Your equations (and my slightly altered one) were spot on on both test scenarios as defined above.
I also tried to increase the altitude to 5000m as you suggested before, and at least one of the bombs was still hitting the target pattern. Great!

...until I switched from SB-2 to Ju-88 or B-25.
On both maps and both altitudes the bombs fell always short. Too short. Maybe 2-3 bombsight degrees.
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