Takeoff distance calculations?

What ever number you get from a calculation, a table or a
graph is only as accurate as your skill at reading the data.
A digital computer, whether a PDA or a desktop PC may return
results to 9 decimal places, but the answer is still just a
guess. Add 50% of the stuff that helps and 150% of the
stuff that hurts and then add 10-25% to take-off distance
and reduce climb by 50% and you'll live a lot longer.


--
James H. Macklin
ATP,CFI,A&P

--
The people think the Constitution protects their rights;
But government sees it as an obstacle to be overcome.
some support
http://www.usdoj.gov/olc/secondamendment2.htm
See http://www.fija.org/ more about your rights and duties.


"Frode Berg" wrote in message
...
|
| "Casey Wilson" N2310D @ gmail.com skrev i melding
| news:P01cg.5963$ix2.4053@trnddc03...
|
| "Frode Berg" wrote in message
| ...
| Hi!
|
| I fly a Piper Arrow 180 hp from 1968
|
| Anyone have a spreadsheet or programme to calculate
takeoff and landing
| distance letting you input weights, pressure alt,
temperature?
|
| Frode
|
| I don't, but you do. Check out the POH that came
with the aeroplane.
|
|
| No POH with the 68 Arrow I'm afraid, but only an "Owners
handbook"
| Piper didn't start making POH's until a few years later,
or so I've been
| told.
|
| Anyway, I'm all for paper, eraser and all that analogue
stuff of yesteryear
| and next year, but it would be fun to be able to calculate
light the Boeing
| drivers do the excact "estimated" runway distance needed.
|
| (excact estimated, can I say that??)
|
| Anyway, the Owners handbook has a few diagrams, but the
resolution for all
| the graphs I've ever seen in various other POH's aren't
too good.
|
| They give you a general idea, and there's lot's of
interpolation going down.
| Now, I'd never base a take off down to cm (or inches for
you yanks) of
| available runway, but putting in a couple of figures into
the PDA and
| getting a figure back out is an interesting idea to me.
| I can always grab the paper version and try to make a more
or less straight
| pencil line down the graph, but what the hey, the PDA is
sitting there, so
| an axact figure is possible, and I'm not scared by excact
calculations.
|
| :-)
|
| Just another thing to put into my PDA and fiddle with
while waiting for the
| weather to clear up....
|
| Frode
|
|

Excellent point. Especially when calculators were first commonly
available, I would see people report results to all eight digits, when
the input numbers would maybe support two digits of accuracy.

Another huge variable is pilot technique.

tom

GiGo, garbage in, garbage out.


"tom" wrote in message
oups.com...
| Excellent point. Especially when calculators were first
commonly
| available, I would see people report results to all eight
digits, when
| the input numbers would maybe support two digits of
accuracy.
|
| Another huge variable is pilot technique.
|
| tom
|