F-15 Stores Drag

[GGTharos]

Thanks, done.

[BIGNEWY]

I will take a look, 

but I have hidden the charts they break our 1.16 rule, @Exorcet

[henshao]

13 hours ago, draconus said:

That's how it is on the chart.

there's more than one chart in there

[henshao]

  

8 hours ago, GGTharos said:

@BIGNEWYPlease look at the chart above.  The acceleration discrepancy is quite significant for this aircraft.   It's too slow in acceleration up to about M1.65 and too fast after.

For example, to reach M1.5 you should take about 190 sec but it takes 220.   30 seconds is a very large deviation; this trend is similar from M1.1 (from 0.8 to 1.1 there is a deviation also, but much smaller) up to M1.5-1.6 or so.

 

@Exorcet does the clean acceleration match?

 

 clean acceleration is extremely close to the -1, still a little quick on the top end

 

	-1	dcs
initial	~.83	~.83
50 sec	~1.21	1.217
100	~1.58	1.577
150	~1.93	1.974
200	~2.23	2.248
250	Beyond 2.38	2.422
300	Time Limited Pursuit	2.526

 

Edited November 22, 2021 by henshao

[Exorcet]

23 hours ago, henshao said:

You did the test with a centerline bag? I tested without one

 

Yes, it's the one I happened across, so I used the chart with the tank. I guess on the plus side it gives us more data.

8 hours ago, BIGNEWY said:

I will take a look, 

but I have hidden the charts they break our 1.16 rule, @Exorcet

Sorry for that, I was using the same data available from the user files so I thought it would be OK to post.

 

11 hours ago, GGTharos said:

 

@Exorcet does the clean acceleration match?

 

Clean is much closer, though I can't post my comparison on top of the chart. It still very slightly underperforms in the transonic, but is pretty much perfect after M 1.6.

2.7.8 OB F-15 Clean accel 40000 lbs

M 1.0	23 sec
1.1	36
1.2	52
1.3	67
1.4	81
1.5	94
1.6	106
1.7	118
1.8	130
1.9	144
2.0	159