unknown.exe wrote:
...the scenario in the checklist folder...
Now, where was this crystal ball of mine

Oh, now I see it clearly. You mean "Mission 3 - Deorbit" and you are flying the stock DeltaGlider. Seriously, try providing more information when you ask a question.
The easiest way to arrive at KSC with the right speed is to use constant deceleration. At least it is easiest if you fly manually and do not want to use any fancy MFDs.
Suppose you start experiencing significant drag at D=4,000,000 m from the base and your airspeed is Va=7,250 m/s. You want to arrive at the base with some speed reserve, say Vb=400 m/s. Then you can determine the required deceleration from
a = (Va^2 - Vb^2) / (2 * D) = 6.55 m/s^2
So just control your vertical speed to keep the acceleration shown on Surface MFD near -6.55. If your rate of deceleration is higher, bank less to reduce vertical speed, if it is lower, bank more.
It will help if you create a table for the expected speed at different distances from the base using the formula
Vi = Sqrt(Va^2 - 2 * a * (D - Di))
where Di is the distance (in meters, multiply by 1000 for kilometers) and Vi should be your speed at that distance. For the numbers above, you should get
Di, km Vi m/s
4000 7250
3500 6783
3000 6282
2500 5737
2000 5134
1500 4451
1000 3642
500 2590
250 1853
125 1341
0 400
check your speed at each distance and apply more/less deceleration if your actual speed is above/below the calculated one. At the final stage use the airbrake to control your speed as you are turning towards the runway and aligning with it.
Post Edited ( 04-14-08 08:07 )