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Search: Posts Made By: ft
Showing results 1 to 35 of 434
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Forum: Tech Log
13th Apr 2013, 19:02
Replies: 39
Views: 7,834
Posted By ft

It's the new unit proposed to be used for...

It's the new unit proposed to be used for acceleration by the NAECAMISA (North America Except Canada And Mexico International Standards Agency). It was decided that fathoms per forthnight per moment...
Forum: Rumours & News
16th Dec 2012, 07:58
Replies: 47
Views: 17,818
Posted By ft

bubbers, I think something else was going on....

bubbers,
I think something else was going on. The entire GP reflection area is pretty much off limits, i.e. no roads, taxiways etc (though I've seen, and immensely disliked, access roads on the...
Forum: Tech Log
21st Oct 2012, 14:35
Replies: 52
Views: 23,279
Posted By ft

Yes, very good. Just what I wrote a few posts up....

Yes, very good. Just what I wrote a few posts up.



Note the word 'origin' in the text you quoted. The visual approach slope origin is not the same as the actual VASI unit.

And it is still...
Forum: Tech Log
21st Oct 2012, 12:44
Replies: 52
Views: 23,279
Posted By ft

If you read Annex 14, you will find that the...

If you read Annex 14, you will find that the distances to the aim point and TDZ markings depend on runway length/LDA and not on the approach type. I'm guessing the source of the confusion is the fact...
Forum: Tech Log
21st Oct 2012, 11:37
Replies: 388
Views: 100,136
Posted By ft

One of the things which continues to throw a...

One of the things which continues to throw a spanner in the works each time this subject is broached is the fact that people look at Bernoulli's theorem but only see the equation and forget to look...
Forum: Tech Log
21st Oct 2012, 11:03
Replies: 52
Views: 23,279
Posted By ft

No, but regardless of where they are situated,...

No, but regardless of where they are situated, they are required to deliver you on the correct glide slope to a point 15 to 18 m above the threshold (some caveats apply, but that's the gist of it).
...
Forum: Tech Log
25th Aug 2012, 22:05
Replies: 4
Views: 21,424
Posted By ft

Normally, as per ICAO standards, localizers are...

Normally, as per ICAO standards, localizers are commissioned to 25 nm in the course sector and 17 nm out to 35 degrees off centerline.

In the U.S., and possibly other places, frequency congestion...
Forum: Tech Log
7th Aug 2012, 06:42
Replies: 8
Views: 3,183
Posted By ft

OBN, the automagics will compensate for winds...

OBN,
the automagics will compensate for winds as seen to remain on centerline.
Forum: Tech Log
7th Aug 2012, 06:38
Replies: 6
Views: 4,549
Posted By ft

There is of course a standard laying down the...

There is of course a standard laying down the specifications which an altimeter has to be designed and manufactured to in order to be approved. Unfortunately, it is one of those non-free standards...
Forum: Tech Log
9th Jul 2012, 08:01
Replies: 26
Views: 8,997
Posted By ft

The currently recommended figure of three times...

The currently recommended figure of three times the number of thousands of feet was arrived at through extensive TE research and is now a JAR-compliant standard for most types. In addition, it...
Forum: Tech Log
3rd Jul 2012, 21:39
Replies: 6
Views: 2,476
Posted By ft

Commissioned GP coverage is usually only ten...

Commissioned GP coverage is usually only ten miles, so 4500 above the facility is technically a no-go. Most equipment will pick it up even if it is below the tolerance signal levels, but the facility...
Forum: Tech Log
23rd Jun 2012, 20:20
Replies: 8
Views: 2,080
Posted By ft

What you are describing in a lot of words is what...

What you are describing in a lot of words is what is usually described, in rather fewer words, as an accelerated reference frame.



If you break it down further, it's actually all

F = m * a,...
Forum: Tech Log
23rd Jun 2012, 18:54
Replies: 8
Views: 2,080
Posted By ft

What is G force? It is the load factor, or nz....

What is G force? It is the load factor, or nz. What is the load factor? It is acceleration. Referencing it to the normal acceleration on the surface of the earth is just a way of making the number...
Forum: Tech Log
23rd Jun 2012, 16:56
Replies: 8
Views: 2,080
Posted By ft

FlightPathOBN, in fact it is just as simple as...

FlightPathOBN,
in fact it is just as simple as that. The equation describes the acceleration (a) of an object with velocity v following a curved path with radii r in all and any conditions.

If...
Forum: Tech Log
22nd Jun 2012, 07:49
Replies: 8
Views: 2,080
Posted By ft

a = v^2/r For the prop, I think all will...

a = v^2/r

For the prop, I think all will become clear as you do your airfoil model. Integrate the torque from drag and lift along the blade for various conditions. Consider what the airspeed does...
Forum: Tech Log
3rd Apr 2012, 18:39
Replies: 156
Views: 91,951
Posted By ft

oggers, for once we agree! That does make...

oggers,
for once we agree!

That does make the point clearly. Power used, heat and noise generated, car remaining completely motionless - hence, no work done on the car. Efficiency zero (0).
...
Forum: Tech Log
2nd Apr 2012, 20:25
Replies: 156
Views: 91,951
Posted By ft

If you're not doing any useful work, you can't...

If you're not doing any useful work, you can't claim to be efficient. End of story.

As for your uncontroversial proof of understanding, it dictates that if the Joules leaving the system per time...
Forum: Tech Log
29th Mar 2012, 20:11
Replies: 156
Views: 91,951
Posted By ft

A little understanding is indeed a dangerous...

A little understanding is indeed a dangerous thing.

Force times velocity has been iterated ad nausea throughout this thread.

It's multiplication.

What happens when you multiply by a very...
Forum: Tech Log
11th Mar 2012, 10:16
Replies: 36
Views: 22,029
Posted By ft

As pointed out earlier, lower ambient temperature...

As pointed out earlier, lower ambient temperature does not necessarily mean the temperature in the manifold (which is what matters) is any lower if the MAP is the same. It all comes down to the...
Forum: Tech Log
3rd Mar 2012, 20:35
Replies: 16
Views: 4,192
Posted By ft

I know of a certified WiFi device, was rather new...

I know of a certified WiFi device, was rather new in 2010. They apparently had to block parts of the frequency spectrum normally used though. Rather peculiar if others have been using it without...
Forum: Tech Log
24th Feb 2012, 14:10
Replies: 12
Views: 2,790
Posted By ft

Ah, some kind of semi-intelligent device which...

Ah, some kind of semi-intelligent device which monitors the braking action vs what experience says the aircraft should be able to achieve, and which then by radio informs the tower of the result?
...
Forum: Tech Log
5th Feb 2012, 19:25
Replies: 20
Views: 8,153
Posted By ft

Point-in-case: The data is there, as part of...

Point-in-case:

The data is there, as part of the data package. Part of the AFM has moved into a piece of software referenced from the AFM. Doesn't really change anything, except for the fact that...
Forum: Tech Log
5th Feb 2012, 17:28
Replies: 20
Views: 8,153
Posted By ft

PT6A, please send me a post-card from your...

PT6A,
please send me a post-card from your vacation in the Land of Semantics.

Address:
Fred
Practical Applicability Rd.
RW-127 85 The Real World

;)
Forum: Tech Log
4th Feb 2012, 17:21
Replies: 20
Views: 8,153
Posted By ft

If you really can't find the climb gradient in...

If you really can't find the climb gradient in your performance manuals, I have a feeling you may have a hard time complying with certain requirements to show that you can depart without hitting...
Forum: Tech Log
2nd Feb 2012, 20:35
Replies: 20
Views: 8,153
Posted By ft

Whip out your trusty E6B/CR-3/CR-2, set the...

Whip out your trusty E6B/CR-3/CR-2, set the planned ground speed at the speed index and read the required FPM above the required feet per nm.

Theory: If you are doing the set GS, you'll have the...
Forum: Tech Log
1st Feb 2012, 18:47
Replies: 14
Views: 28,588
Posted By ft

Well, the C172 does have an AoA indicator....

Well, the C172 does have an AoA indicator. Unfortunately, the resolution of the indication is rather low... stall horn on or stall horn off. But an AoA indicator it is. :8
Forum: Tech Log
30th Jan 2012, 18:09
Replies: 36
Views: 22,029
Posted By ft

And here I thought the MAP gauge indicated the...

And here I thought the MAP gauge indicated the pressure in the intake manifold... silly me! Now, where did I get that outrageous idea from? Would that amount be in mass or volume? :8

I have a...
Forum: Tech Log
29th Jan 2012, 18:55
Replies: 36
Views: 22,029
Posted By ft

By my reckoning, the factor of two should have...

By my reckoning, the factor of two should have been a factor of one half, leaving us at one quarter of the calculated power loss?
Forum: Tech Log
29th Jan 2012, 18:08
Replies: 36
Views: 22,029
Posted By ft

Hmmm... one exhaust stroke per cylinder per two...

Hmmm... one exhaust stroke per cylinder per two revolutions though, now that you mention it.
Forum: Tech Log
29th Jan 2012, 17:25
Replies: 36
Views: 22,029
Posted By ft

Work = Force * distance Force = Pressure *...

Work = Force * distance

Force = Pressure * Area

Work = Pressure * Area * distance

Swept volume = Area * distance

Work = Pressure * Swept volume
Forum: Tech Log
28th Jan 2012, 19:10
Replies: 38
Views: 7,890
Posted By ft

I think we're seeing a clash of the justified...

I think we're seeing a clash of the justified equal and opposite reaction to the classical "bullets impinging the wing and bouncing off the underside" flawed explanation of Newtonian lift, and a very...
Forum: Tech Log
28th Jan 2012, 19:03
Replies: 36
Views: 22,029
Posted By ft

italia458, what hot gasses? In a naturally...

italia458,
what hot gasses?

In a naturally aspirated engine, you have expansion affecting the temperature in the manifold. In a charged engine, you (usually) have compression. What's more...
Forum: Tech Log
28th Jan 2012, 14:35
Replies: 36
Views: 22,029
Posted By ft

But... the OAT is lower as the pressure is lower....

But... the OAT is lower as the pressure is lower. As you raise the pressure in the induction system, the temperature will rise again. Now, is the atmosphere lapse rate with pressure higher or lower...
Forum: Tech Log
28th Jan 2012, 08:07
Replies: 36
Views: 22,029
Posted By ft

It will be lower, due to the lower exhaust...

It will be lower, due to the lower exhaust backpressure. IIRC, Aerodynamics for Naval Aviators has an excellent description of this. Hopefully not edited out in later editions in spite of kerosene...
Forum: Tech Log
23rd Jan 2012, 18:56
Replies: 11
Views: 3,224
Posted By ft

Working with the b****y things, that's what...

Working with the b****y things, that's what 'harmonized' means to me. Rereading I see it's not what the poster I was answering meant though, so thanks for bridging the gap! :ok:
Showing results 1 to 35 of 434
 
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