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Marc Zeitlin's latest activity
Help Support HomeBuiltAirplanes.com:
Marc Zeitlin
reacted to
Vigilant1's post
in the thread
Engine failure turn back.
with
Like
.
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...
Today at 10:28 PM
Marc Zeitlin
replied to the thread
Engine failure turn back.
.
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...
Today at 8:05 PM
Marc Zeitlin
replied to the thread
10/23 Raptor Video
.
Unless we want to start going down the rathole of political argumentation, it would be better to leave political commentary out of these...
Today at 3:45 PM
Marc Zeitlin
replied to the thread
10/23 Raptor Video
.
And this thesis, from 1936 (Caltech), says pretty much that, and has some references to other documents that say similar things...
Apr 12, 2021
Marc Zeitlin
replied to the thread
TONS of low cost King Mode C's out there... opinions?
.
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...
Apr 11, 2021
Marc Zeitlin
reacted to
rv7charlie's post
in the thread
Where to look for source of temporary electrical system failure?
with
Like
.
I can't address the VP-X specifically, from memory. But some of the distribution boxes have one or more single-point-of-failure...
Apr 9, 2021
Marc Zeitlin
replied to the thread
New Optional Task-based Phase 1 Flight Test Program for E-AB
.
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...
Apr 6, 2021
Marc Zeitlin
replied to the thread
New Optional Task-based Phase 1 Flight Test Program for E-AB
.
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...
Apr 5, 2021
Marc Zeitlin
replied to the thread
New Optional Task-based Phase 1 Flight Test Program for E-AB
.
I will disagree that it can possibly take substantially less than 40 hours to TRULY test a new aircraft, kit or otherwise, modification...
Apr 5, 2021
Marc Zeitlin
reacted to
rv7charlie's post
in the thread
Where to look for source of temporary electrical system failure?
with
Like
.
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...
Apr 5, 2021
Marc Zeitlin
replied to the thread
10/23 Raptor Video
.
I haven't been paying close attention - is PM really discussing some 40 hour limit on flight testing? And flying the plane outside of...
Mar 30, 2021
Marc Zeitlin
replied to the thread
10/23 Raptor Video
.
So there's been a bunch of speculation here regarding the Airworthiness Certificate, Operating Limitations, Area Restrictions, and other...
Mar 29, 2021
Marc Zeitlin
replied to the thread
Adjusting Airspeed for Altitude
.
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...
Mar 26, 2021
Marc Zeitlin
replied to the thread
Adjusting Airspeed for Altitude
.
You're conflating two different things. You're absolutely correct that the INSTRUMENTS need to be calibrated, so that when they're fed a...
Mar 26, 2021
Marc Zeitlin
replied to the thread
Adjusting Airspeed for Altitude
.
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...
Mar 25, 2021
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