Marc Zeitlin's latest activity

Yes, I did see that. The formula is fine for adjusting Vs to non-zero bank angles. But, even at zero degree bank angle the wing still...

If you read the article, he's very clear that he's assuming a stall speed in the turn of Vs/cos(bank angle), as the math demands. He's...

Unless we want to start going down the rathole of political argumentation, it would be better to leave political commentary out of these...

And this thesis, from 1936 (Caltech), says pretty much that, and has some references to other documents that say similar things...

That's not how 91.413 tests work. A Transponder check, done every 24 months per 14 CFR Part 91.413, is done IN the plane, including the...

I can't address the VP-X specifically, from memory. But some of the distribution boxes have one or more single-point-of-failure...

Agreed - for very simple planes, fewer than 30 hours may very well be required. And what set me off on the first posting was that the...

I do. And while I CERTAINLY agree that the 3,053'd RV-7 is going to be WAY more similar to the 15th RV-7 is than the 3,053'd Long-EZ is...

I will disagree that it can possibly take substantially less than 40 hours to TRULY test a new aircraft, kit or otherwise, modification...

Hi Jim, I won't pretend to be an expert, but I did have several careers in electronics, and I've been doing electrical/electronic...

I haven't been paying close attention - is PM really discussing some 40 hour limit on flight testing? And flying the plane outside of...

So there's been a bunch of speculation here regarding the Airworthiness Certificate, Operating Limitations, Area Restrictions, and other...

Since the LSA requirement states that CAS is used for stall speed limitations, if one doesn't know what one's CAS is in relation to IAS...

You're conflating two different things. You're absolutely correct that the INSTRUMENTS need to be calibrated, so that when they're fed a...

This is true. With E-AB aircraft, very few do ANY testing, other than flying around in circles at mid weights and mid CG during their...