Simviation Forum

Jul 25^th, 2010 at 1:20pm

RAFAIR100 Offline
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If there is no legend on the dial of an ASI, is it possible to determine whether it is calibrated in knots or mph?

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Reply #1 - Jul 25^th, 2010 at 1:35pm

Fozzer Offline
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[quote author=RAFAIR100 link=1280078448/0#0 date=1280078448]If there is no legend on the dial of an ASI, is it possible to determine whether it is calibrated in knots or mph?[/quote]

Have you tried changing to the "Mini Panel" (W Key) to compare the reading on both instruments?

The Mini-Panel ASI will most likely be reading; "knots".

Paul...G-BPLF...FS 2004...FS Nav... 8-)...!

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Reply #2 - Jul 25^th, 2010 at 2:04pm

Hagar Offline
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Press Shift + Z. The IAS is shown in knots at the top of the screen.

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Reply #3 - Jul 26^th, 2010 at 1:21pm

RAFAIR100 Offline
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Thank you Hagar. I should have known that.

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Reply #4 - Jul 26^th, 2010 at 1:31pm

Hagar Offline
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It's easy to forget these things. Wink

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Reply #5 - Jul 26^th, 2010 at 8:16pm

patchz Offline
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[quote author=Fozzer link=1280078448/1#1 date=1280079320][quote author=RAFAIR100 link=1280078448/0#0 date=1280078448]If there is no legend on the dial of an ASI, is it possible to determine whether it is calibrated in knots or mph?[/quote]

Have you tried changing to the "Mini Panel" (W Key) to compare the reading on both instruments?

The Mini-Panel ASI will most likely be reading; "knots".

Paul...G-BPLF...FS 2004...FS Nav... 8-)...!

http://www.disastercenter.com/convert.htm[/quote]
[color=#000000]Why does it stop at 150 kts Paul? ::) And what the heck happened to the roll eyes smiley? :-/[/color]

If God intended aircraft engines to have horizontally opposed engines, Pratt and Whitney would have made them that way.

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Reply #6 - Jul 27^th, 2010 at 3:54am

Fozzer Offline
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An elderly FS 2004 addict!
Hereford. England. EGBS.

Posts: 24861

patchz wrote on Jul 26^th, 2010 at 8:16pm:

Fozzer wrote on Jul 25^th, 2010 at 1:35pm:

RAFAIR100 wrote on Jul 25^th, 2010 at 1:20pm:

If there is no legend on the dial of an ASI, is it possible to determine whether it is calibrated in knots or mph?

Have you tried changing to the "Mini Panel" (W Key) to compare the reading on both instruments?

The Mini-Panel ASI will most likely be reading; "knots".

Paul...G-BPLF...FS 2004...FS Nav... Cool

...!

http://www.disastercenter.com/convert.htm

Why does it stop at 150 kts Paul?

And what the heck happened to the roll eyes smiley? Undecided

Here you go Larry!:.... Grin

...

...!

It is familiar with the maximum speed of my trusty Cessna 150....
..no point in carrying the list further... Wink

...!
...... Grin

....!

Actually, the list is for Wind Speed, on the ground....the stuff that blows your Trash Can over... Shocked

....

....!

I've got various Conversion Tables bookmarked in my Browser.

Metres (NOT Meters!) to: Rods, Poles, Perches, and Chains...etc.. Kiss

...!

Paul.... Grin

...

...!

patchz wrote on Jul 26^th, 2010 at 8:16pm:

And what the heck happened to the roll eyes smiley? Undecided

[/color]

Un-check the Box which says: "You want to use your own code, and dont like Smilies".... Wink

....!

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Reply #7 - Jul 27^th, 2010 at 1:10pm

patchz Offline
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It wasn't checked Paul. I just figured something was going on with the server or YaBB. Cheesy

And I get meters/metres, rods and poles, but what the heck do fish (Perches) and chains have to do with it? Undecided

If God intended aircraft engines to have horizontally opposed engines, Pratt and Whitney would have made them that way.

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Reply #8 - Jul 27^th, 2010 at 1:55pm

Hagar Offline
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patchz wrote on Jul 27^th, 2010 at 1:10pm:

And I get meters/metres, rods and poles, but what the heck do fish (Perches) and chains have to do with it? Undecided

The word perch is from the French perche, derived from the Latin pertica, meaning a pole or staff. Originating in Roman antiquity, it spread with the Roman Empire and was likely re-introduced to England with the Norman Conquest of 1066. In the Roman Empire, France and England, it also could mean area (square perches), and among operative masons of the Middle Ages, volume.

The (Gunter's) chain used to be an important item of surveying equipment. It's an actual chain 22 yards in length. They have one on display at the Weald & Downland Museum at Singleton which is a few miles from where I'm sitting. I remember taking a photo of it when I last visited.

Photo: http://www.orbitals.com/self/survey/chain/chain.html

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Reply #9 - Aug 1^st, 2010 at 10:25am

Nav Offline
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Posts: 717

Quote:

The (Gunter's) chain used to be an important item of surveying equipment. It's an actual chain 22 yards in length. They have one on display at the Weald & Downland Museum at Singleton which is a few miles from where I'm sitting.

Don't think you'd need to look in a museum - as a (now retired) Chartered Surveyor, it would still be my preferred method of measurement. If only because it's a damn sight lighter than most of the alternatives (like the 100-foot Engineers Chain)!

Maybe off-topic, but it was a brilliant (1620) invention, and is so far the only entirely-successful application of the 'decimalisation' principle (that is, the principle of using measurements divisible by ten) that has yet been devised.

It was basically a chain 66 feet (22 yards) long, divided into 100 links.

Thing is, British (and American) property is still measured in yards, translated into acres and furlongs. It's a nuisance, though, that these are measured in feet and yards, and those are usually based on 12, not 10. Gunter, way back then, solved that problem by making his chain 22 yards long - which meant that 10 chains made a furlong, 8 furlongs made a statute mile, and - probably most important - 10 SQUARE chains made an acre........

So - Gunter produced the only sensible 'metric system' that has ever been invented - 'metricating' the Imperial system of measurement.

Of course, the French then produced the current, nonsensical, Metric System, which has left all of us drowning in a sea of decimal points; as one example, an acre is (approximately

) 4,046.8564224 sq. metres.......

I'd have much preferred that the world had adopted Gunter's principle -it would have saved a lot of complicated calculations.

For English, Aussie, and other cricket fans, I should add that Gunter's Chain was (and remains) the reason why a cricket pitch is 22 yards long. Which, on reflection, is probably the perfect length for a good game? So, arguably, Gunter got THAT right as well?

Though of course, nowadays, the poor guy laying out a new pitch would have to make it exactly 6.7056 metres long........

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