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Forum: Tech Log

17th Jan 2018, 23:25

Replies: 21

Vy equals 1.32*Vx

Views: 6,542

Posted By Vessbot

Yes. Interesting point about the U-2, which lived...

Yes. Interesting point about the U-2, which lived in coffin corner: separately from the wing aerodynamics, at its altitudes, idle power on the engine climbed so high that it met with the turbine temp...

Forum: Tech Log

17th Jan 2018, 23:20

Replies: 21

Vy equals 1.32*Vx

Views: 6,542

Posted By Vessbot

I missed this post earlier. Yes, 1.32 is only...

I missed this post earlier. Yes, 1.32 is only true at sea level, and only true as an approximation. There is no exact mathematical law by which it reduces to 1.00

Forum: Tech Log

17th Jan 2018, 22:39

Replies: 21

Vy equals 1.32*Vx

Views: 6,542

Posted By Vessbot

Yes you did, apparently without realizing it....

Yes you did, apparently without realizing it. "Coffin corner" means the speed-altitude point where the increasing stall speed converges with the decreasing Mach limit. There, you can only fly at one...

Forum: Tech Log

17th Jan 2018, 19:21

Replies: 21

Vy equals 1.32*Vx

Views: 6,542

Posted By Vessbot

eckhard What you say is true, but I think...

eckhard

What you say is true, but I think it's belaboring the point. If the OP is asking about Vx/Vy type stuff, then I think they're still trying to figure out how the performance-limited ceiling...

Forum: Tech Log

17th Jan 2018, 16:38

Replies: 21

Vy equals 1.32*Vx

Views: 6,542

Posted By Vessbot

The higher you climb, performance decreases until...

The higher you climb, performance decreases until it necessarily reaches a point when you you cannot climb any more, i.e., rate and angle are both zero and the best you can do is level flight.

If...

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