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
|
|