Feet Per Minute Conversion Question

"John Giddy" wrote in message ...
"Lennie the Lurker" wrote in
message
om...
| (JJ Sinclair) wrote in message
...
| feet per sec X 0.508 = meters per sec
|
| This from the 1987 SSA MEMBERSHIP HANDBOOK.
|
| Haven't seen an updated book in 20 years. It has lots of
useful information,
| like this in it.
| JJ Sinclair
|
| 1 meter =39.37 inches. Methinks someone screwed up, like
JJ. Maybe
| try .3048, just seems to agree with fact, and good math,
not new math,
| not french math, either. Nautical mile 6080 feet, as
against 5280 for
| statute mile.
|
| nautical mile - statute mile =1.1515
|
| statute mile - nautical mile = .8684

Lennie,
6080 feet is the United Kingdom Nautical Mile
6076.115 feet is the United States Nautical Mile
According to the conversion program I use (Prokon, by Harold
Schwartz, Jefferson City, MO)
Cheers, John G.

So change the last two digits to correct it. Then try to read that
off your VSI. I don't use converstion programs, just an old copy of
the math tables published by Industrial PRess, copyright 1929.
Sometimes factors applied with my old Post Versalog. Close enough for
most matters, except for nitpickers.

Ups, make that;
Hundreds of feet per minute times 0.508 = meters per second.
JJ Sinclair

300 fpm = 3 knots
500 fpm = 5 knots

etc., etc., etc.


Mike Yankee

(Address is munged to thwart spammers.
To reply, delete everything after "com".)

1 Knot = 1 NM/Hr = 6080ft/Hr * 1Hr/60min = 101.3 Ft/min
For practical variometer purposes, equate 1 knot to 100 ft/min

Dave Ellis


"Steve B" wrote in message
om...
I think in Feet Per Minute... I must be from a different country.

How do you convert Kts per Sec / Meters per sec / Kilometers etc... to
Feet per minute

Thanks

1Knt equals approx 100feet per min..

BT
"Steve B" wrote in message
om...
I think in Feet Per Minute... I must be from a different country.

How do you convert Kts per Sec / Meters per sec / Kilometers etc... to
Feet per minute

Thanks

For practical purposes in flight, 1 meter/Sec = 2 knots = 200 ft/Min
100 knots is about 185 Km/Hr
Not exactly but close enough for mental arithmetic.

--
Hartley Falbaum
"Steve B" wrote in message
om...
I think in Feet Per Minute... I must be from a different country.

How do you convert Kts per Sec / Meters per sec / Kilometers etc... to
Feet per minute

Thanks

(Steve B) wrote in message . com...
I think in Feet Per Minute... I must be from a different country.

How do you convert Kts per Sec / Meters per sec / Kilometers etc... to
Feet per minute

Thanks

While the other responses give the data, there is one point I'd like
to add. Within about 1% accuracy, 100 fpm = 1 kt = 1/2 m/sec. Forget
the 0.508. Who has the mental accuracy (or instrument accuracy) to
work to three significant figures?

It struck me as strange that, within this roughly 1% accuracy,
nautical miles make more sense than either statute miles or the metric
system. When they standardized on the metric system, it's interesting
that they did not decimalize time. We still have 60 sec/min and 60
min/hour. So m/sec and km/hr do not have any nice relation, at least
for those of us who think decimally. But converting fpm to kts is easy
because 6000 (the approximate number of feet in a nautical mile) is
divisible by 60. So, when I have a 1% upgrade on a takeoff runway and
take off at 60 kts, it knocks 60 fpm off my climb rate. Not too much.
But a 2% grade knocks 120 fpm off, getting to be a bit more of a
concern.

Too bad a nautical mile isn't exactly 6000 feet. Or that the metric
guys didn't change to 100,000 seconds per day (now there are 86,400)
and break the day into 10 hours, each with 100 minute, each with 100
seconds. I guess it says something about how deeply ingrained time is
in our culture that they didn't, or couldn't, mess with it. (See E T
Hall's "The Dance of Life" if you're interested in delving further.
It's at least as good in my opinion as his better known "Beyond
Culture.")

Martin

When they standardized on the metric system, it's interesting
that they did not decimalize time.

"They" (the revolutionary French in the late 18th C) did, including days and
months (which aren't arbitrary but relate to astronomical events). But it
wasn't popular or accurate and usage reverted to the old units after a few
years.

How do you convert Kts per Sec / Meters per sec / Kilometers etc... to
Feet per minute

Look at a Winter brand vario. Full scale = 1,000fpm, 10 kt, or 5 m/s, as
the customer prefers. Only the face-plate is changed, it's the same unit
otherwise.

Navigational question for the day;
One minute of latitude = 1 nautical mile. At what point on the earth does 1
minute of longatude = 1 nautical mile?
JJ Sinclair