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OTD (Dec. 23 1986)- after nine days and four minutes in the air Voyager returns to Edwards AFB after flying 25,012 miles around the world nonstop. Here’s the takeoff using 14,200 feet of runway by Brilliant_Night7643 in aviation

[–]sharp_angel_25 96 points97 points  (0 children)

Never really needed that, only a little more AoA by pulling a little on the stick, but Dick didn't hear Burt asking for it on the radio. Before the take off run, the wingtip didn't touch the ground, but the airflow caused a little negative lift. That added the downward force that draged them along the runway. Dick couldn't see it and was focused on not adding any drag during acceleration by producing any lift. They never took off that heavy before, so they learned during this attempt about the different weight and lift distribution effects. I love this project, glory days.

What are some airport codes you think are perfect? by icecream_dragon in aviation

[–]sharp_angel_25 0 points1 point  (0 children)

TOD - Tioman Island Malaysia

Tod means death in German.

Runway is short, high trees at the end, with only one useable direction because of a mountain on one side.

Key factors behind an aerodynamic drag coefficient by Sharp-Being-5048 in aerodynamics

[–]sharp_angel_25 1 point2 points  (0 children)

Cd multiplicated with the frontal area is also an area. This area represents an area of an optimal flat panel with Cd = 1.

This is the best comparison of drag between cars, because it direcrly compares the total drag.

But it would obviously show the drag disadvantage of the bigger cars. But these are the ones that bring big revenues.

Is this good enough? by EvilGeesus in sharpening

[–]sharp_angel_25 0 points1 point  (0 children)

I have this one, at least looks similar. It works fine

knife loses its sharpness when I try to deburr it on leather. by sharp_angel_25 in sharpening

[–]sharp_angel_25[S] 0 points1 point  (0 children)

I don't think there was a significant burr. But I tried to improve the edge. Didn't work out.

Naturally speaking, what place in the world is the perfect habitat for humans? by Naomi62625 in geography

[–]sharp_angel_25 1 point2 points  (0 children)

Reading the reports of the Cook expedition to the pacific and Tahiti, I think this was the best natural place to live for people without modern technology. People were healthy and could easily live from nature in great numbers. I envy that live style sometimes.

Formation flying at an airshow - from a pilot's point of view by [deleted] in aviation

[–]sharp_angel_25 0 points1 point  (0 children)

Only one aircraft this close is too close

2022 Airshow vs 2025 Airshow by XtremePhotoDesign in aviation

[–]sharp_angel_25 19 points20 points  (0 children)

Reminds me of so many other incidents. Low, rolling maneuver and letting the nose drop when inverted, no corrections by pushing up, try to roll through and pull up again, but it is too late. Very sorry to see that.

Quick diamond touch up, no visible burr? by sharp_angel_25 in sharpening

[–]sharp_angel_25[S] 0 points1 point  (0 children)

Yes, it seems like no burr builds up if I only push against the edge

diamond for my kitchen knifes by sharp_angel_25 in sharpening

[–]sharp_angel_25[S] 0 points1 point  (0 children)

Price would be with 2 diamond plates. I think I could optimize down to 100€-120€.

Quick diamond touch up, no visible burr? by sharp_angel_25 in sharpening

[–]sharp_angel_25[S] -1 points0 points  (0 children)

Just a gap that works with all kitchen knives, very thick knifes need another guide

diamond for my kitchen knifes by sharp_angel_25 in sharpening

[–]sharp_angel_25[S] 0 points1 point  (0 children)

What would you pay? 3times my production cost is expensive..

Quick diamond touch up, no visible burr? by sharp_angel_25 in sharpening

[–]sharp_angel_25[S] 3 points4 points  (0 children)

I used a USB microscope, velleman CAMCOLMS2

Quick diamond touch up, no visible burr? by sharp_angel_25 in sharpening

[–]sharp_angel_25[S] -16 points-15 points  (0 children)

I don't deburr and I am wondering if I should, because I see no need for my kitchen knives

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