Monday, October 17, 2016

2016 High school graduation rate hits record high of 83.2 percent

2016 High school graduation rate hits record high of 83.2 percent

Seattle Times

High school graduation rate hits record high of 83.2 percent
http://www.seattletimes.com/nation-world/high-school-graduation-rate-reaches-new-high
Originally published October 17, 2016 at 3:12 am Updated October 17, 2016 at 10:25 am

The administration reported significant differences in graduation rates among groups. 
Asian Americans had a 90.2 percent graduation rate, while 
whites were at 87.6 percent, followed by 
Hispanics at 77.8 percent, 
African-Americans at 74.6 percent and 
Native Americans at 71.6 percent.


2016 US High School Graduation Rate
1.00 is same was white -2.00 means twice as bad
1.25 means 25% better.

grad dropout
Asian 90.2 9.8 1.27
White 87.6 12.4 1.00
Hispanic 77.8 22.2 -1.79
AfricanAm 74.6 25.4 -2.05
NativeAm 71.6 28.4 -2.29

All groups dropout rate is about twice rate of whites

Asians have dropout rate about 25% less

Thursday, May 26, 2016

F-105 Thunderchief vs F/A-18E/F Super Hornet

F-105 Thunderchief vs F/A-18E/F Super Hornet

The original YF-17 was a lightweight fighter to counter the poor performance of the massive F-105 Thunderchief in dogfights. Irony:  The Super Hornet is even heavier, similar wing loading. The main difference is nearly twice as much thrust.  If F-105 had a tiny wing unsuited for maneuvering, the Super Hornet wing is just as heavily loaded.

Payload: 14,000 lb     vs 17,750 lb

Super Hornet has wider wings, slightly shorter and less tall.
Length: 64 ft 4.75 in           60 ft 1¼ in
Wingspan: 34 ft 11.25 in     44 ft 8½ in
Height: 19 ft 8 in                16 ft

Wing Loading:    93 lb/ft2    /   : 93 lb/ft²     same

Super Hornet has about same dry thrust with one engine as F-105

Thrust dry             14,300  / 13,000 lbf
Thrust afterburner: 24,500 lb /   44,000 lb
Thrust/Weight:  0.74         /  0.93

Super Hornet is heavier
weights                          
empty            27,500 lb   /  32,081 lb
combat          35,637     /  47,000 lb
max takeoff   52,546 l   / 65,180 lbs

Range

Super Hornet
Range: 1,275 nmi (2,346 km) clean plus two AIM-9s[21]
Combat radius: 390 nmi (449 mi, 722 km) for interdiction mission[162]

Ferry range    2,210 mi / 2,070 mi    ~same
Max mach  Mach 2.08    Mach 1.8   F-105 over M2, F-18 slightly under M2
Max speed  1,372 mph,   1,190 mph