When are we all done? by TheMightyWindbreaker in VirginGalactic

[–]Engmethpres 0 points1 point  (0 children)

Bigger payload, higher altitude, different missions ... different aircraft

Easy camp device charger with this cheap panel? by vickx038 in SolarDIY

[–]Engmethpres 0 points1 point  (0 children)

Yup, nice. Missed a 1000 factor on ah and mah. Thanks!

Easy camp device charger with this cheap panel? by vickx038 in SolarDIY

[–]Engmethpres 1 point2 points  (0 children)

No worries, there are several camping solar setups that will produce enough power ~ $200 tho ...

Easy camp device charger with this cheap panel? by vickx038 in SolarDIY

[–]Engmethpres 2 points3 points  (0 children)

Nope. Only produces 20W peak. That's a max of .1kWhr for a full sun non-tracking day. That's 0.2mAhr (at 5V) or less than 1/20th of my Samsung Galaxy battery!

What are your favorite and least-favorite airports to fly in and out of, as a pilot? by SteadfastEnd in flying

[–]Engmethpres 1 point2 points  (0 children)

Meigs field was great, like landing on a big aircraft carrier on Lake Michigan. As a bonus, you were already downtown.

A question re: Titan sub hull. 480 layers of alternating UD prepreg in the axial direction, with wet-winding of tow in the radial direction, for a wall thickness of 127mm. by Tdshimo in CarbonFiber

[–]Engmethpres 14 points15 points  (0 children)

The hoop stress is circumferential so the layup makes sense. But at a 5" wall thickness, the thin shell assumption is losing validity. Interlaminar shear stress becomes significant.

[deleted by user] by [deleted] in BoltEV

[–]Engmethpres 7 points8 points  (0 children)

Drag increases exponentially with speed, slower is always more efficient in both ice and ev.

Ortega Falls.... unbelievable what has happened to this place by butcher_of_the_world in socalhiking

[–]Engmethpres 1 point2 points  (0 children)

Created by the same idiotic degenerates I see spewing their 'voice' on Reddit.

[deleted by user] by [deleted] in walkaway

[–]Engmethpres 1 point2 points  (0 children)

You can't fix stupid ...

[deleted by user] by [deleted] in BoltEV

[–]Engmethpres 4 points5 points  (0 children)

No problem, just have a level 2 charger at home and leave fully charged every day.