REFLECTOR: Builder POH additions

[Terry Miles]

Keith,

 

Yes, I know.  Thanks for helping out again, but that's right to my point.
It is for us to determine performance numbers and in particular for
takeoff/landing data.    

 

Imagine a chart labeled "Takeoff Performance"  with Density Altitude on one
axis and the takeoff ground run on the other.  Now see three sample lines
drawn on the body of the chart.  One for 2900 pounds, 2500 pounds, and 2200
pounds.  Then a series of notes for runway slope, surface winds, other (?).
Do you plan on gathering and then tablizing or graphing takeoff performance
data like that in the course of your phase one fly off?   Look at FAR 91.103
What are we to do?  It doesn't say "Does not apply to runways over 5000
feet."  

 

What will you-or any of us-do when asked say on a ramp check what is being
used for a takeoff performance calculations on any given day?   And 2nd
question how do you plan to present this info in your POH.   If we had a
basic chart for the XL airframe and engine type it would be nice starting
point:  Standard Day, no slope, no wind, dry surface.etc.  Mac's thoughts on
Ken B's ref to the Cirrus might be a nice tool.  Then in the course of phase
one comparison testing, you could develop your own set of deviations from
chart values.   

 

It would be nice to find a performance engineer somewhere to give us some
advice as to how to develop a baseline takeoff data chart.  As time permits,
this is on my list of phase one questions/goals.  (and why I am making this
inquiry)     I don't know.  I depend on you guys a lot for what's accepted
GA practice, and what gets passed off as a mute point based on excess runway
length.  I am only the result of my own experience, and takeoff performance
was always calculated and cross checked by a 2nd crew member for every
flight.  It surprises me in light of FAR directive that the factory "Owners'
Flight Manual" has nothing.    

 

Terry 

 

  _____  

From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of Keith Hallsten
Sent: Sunday, February 24, 2008 3:50 PM
To: 'Velocity Aircraft Owners and Builders list'
Subject: Re: REFLECTOR: Builder POH additions

 

Terry,

 

The purpose of the Phase 1 test flight period is to develop the information
for the flight manual for your plane.  Since experimental planes do not
conform to a type certificate, they are all somewhat different and no
pre-published performance figures are directly applicable to them.  One
Velocity XL might be similar to another Velocity XL, but that's not assured.
We each have to determine the performance numbers that are applicable to our
particular version of the Velocity family of aircraft.

 

Keith Hallsten

 

 

  _____  

From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On
Behalf Of Terry Miles
Sent: Saturday, February 23, 2008 11:50 AM
To: 'Velocity Aircraft Owners and Builders list'
Subject: REFLECTOR: Builder POH additions

 

Hi,

 

I have been working a document that could be construed as a POH supplement.
I have seen some pretty fancy and extensive POH by some builders.  

 

What are all of you doing?  

 

As far as what is FAR legal, at a ramp check, wouldn't the Velocity
published Flight Manual and Weight and Balance book suffice for the POH
requirement?  

(Obviously the wgt and bal numbers would have to be airplane to airplane
specific.) 

 

In the area of performance I haven't seen any Velo specific charts for
things like measuring tkof wgt, density alt, and ground roll.  Does anybody
have a basic set of performance charts for the XL?

 

As for systems operations and descriptions:  I have a pretty extensive
collection of my own notes and of course a lot of avionics Pilot Ops Guide
books and the like, but I am thinking now that they should be considered as
part of a hangar library rather than formally made a part of  the POH.
That said:   I do plan to fly cross country with a laptop loaded with all
this stuff and a spare USB drive with backups.

 

Last, to give an example of what I mean, here is one done by a Long EZ guy.
I also have the PDF version of this if anybody wants it.  It is complete
with all kinds of nice artwork and charts that's over a meg in size.  

 

Anybody wanna talk about what their POH looks like?

 

Thanks,

Terry

 

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