trimtab's latest activity

The FFT (or DFT, in the case of digital acquisition), yields a real and imaginary part. The square root of the sum of the squares is...

1. Collect data with a dummy channel indexed to an odd multiple greater than one of the rotating mass. 2. FFT the results. 3...

A soundcard is another option.

The Doak was an exercise in how to barely lift two people with 60gph of kerosene. Interesting though. I hope VTOL doesn't have to be...

Single seat, 325 lb useful after full fuel. Accommodate a 6'8 pilot without issues 450 mi range. 265 mph cruise. VTOL or < 100' takeoff...

Good summary here ..

It's a good summary using yet another approach to arrive at similar results.

That's what Pete Buck did on the Sonex for the most part.

According to an Alcoa resource I used years ago but cannot find now, extrusions impart significantly different defects at the corners...

Excuse the barn find dust.

I've tensile tested several Nicopress cable assemblies. In all cases, the cables broke, leaving the crimps and eyes intact.

The pie-cut-and weld method works fine. TIG is fast enough for this. You can also buy pre-bent sections and weld them together. It is...

I agree with you. It’s worth $30 to do the research on your own.

Looks like $750 for a $30 roll of turbulator tape for sailplanes. What part of a Cessna is laminar that needs turbulator tape...

As a founder of the largest maker space in the Rocky mountain region, I think there is a large overlap that cod be useful for the EAB...