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Search: Posts Made By: john_tullamarine
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Forum: Tech Log
2nd Aug 2018, 09:49
Replies: 388
Views: 99,887
Posted By john_tullamarine

My German is worse than non-existent so I have no...

My German is worse than non-existent so I have no idea what the text in the graphics is saying. However, the graphics appear to suggest that the writer does not acknowledge downwash ? Looking at the...
Forum: Tech Log
1st Aug 2018, 12:17
Replies: 388
Views: 99,887
Posted By john_tullamarine

Isn't it wonderful that, more than a century...

Isn't it wonderful that, more than a century after the Wright Brothers and half as much again since Cayley, we still can't agree why aircraft fly ?

The techo folk have been in agreement for most...
Forum: Tech Log
1st Aug 2018, 09:04
Replies: 388
Views: 99,887
Posted By john_tullamarine

+1 for post #369 .. should be compulsory reading...

+1 for post #369 .. should be compulsory reading for all engineering undergraduates ...

As for the "friendly little molecules" that separate at the leading edge, and are miraculously re-united at...
Forum: Tech Log
28th Jul 2018, 12:17
Replies: 388
Views: 99,887
Posted By john_tullamarine

Just having a bit of a trawl through old threads...

Just having a bit of a trawl through old threads and came across this one.

Now that I think upon it, we haven't had a good set to on lift (that I can recall) for some time.

We probably have...
Forum: Tech Log
22nd Nov 2016, 02:11
Replies: 388
Views: 99,887
Posted By john_tullamarine

It may have been posted previously (and I missed...

It may have been posted previously (and I missed it) but, just in case it hasn't been ... the article by Arvel Gentry (referred to on p2 - post 33 by Owain Glyndwr) can be found as the final link in...
Forum: Tech Log
17th Nov 2012, 10:17
Replies: 388
Views: 99,887
Posted By john_tullamarine

For occasional special characters, if you are...

For occasional special characters, if you are using a Microsoft installation, you might try the character applet which gives you access to the complete character set for each font installed .. eg on...
Forum: Tech Log
1st Nov 2012, 09:58
Replies: 388
Views: 99,887
Posted By john_tullamarine

If I may be permitted the luxury of indulging in...

If I may be permitted the luxury of indulging in a little heresy ...

One of the benefits in having a variety of views expressed -expert (and for those who don't know who OG is .. he is, most...
Forum: Tech Log
24th Aug 2012, 05:06
Replies: 388
Views: 99,887
Posted By john_tullamarine

Then, at some stage, we should have a convivial...

Then, at some stage, we should have a convivial ale and reminisce on such things.

Certainly, having done a lot of class room teaching over the years ranging from tertiary aviation/engineering...
Forum: Tech Log
24th Aug 2012, 04:36
Replies: 388
Views: 99,887
Posted By john_tullamarine

We are in heated agreement.

We are in heated agreement.
Forum: Tech Log
24th Aug 2012, 04:19
Replies: 388
Views: 99,887
Posted By john_tullamarine

Naught wrong with reading good books, my friend. ...

Naught wrong with reading good books, my friend.

I am in two minds about the internet, though. On the one hand, it opens up a mass of links to all sorts of good stuff .. but, at the same...
Forum: Tech Log
24th Aug 2012, 03:43
Replies: 388
Views: 99,887
Posted By john_tullamarine

But I'm only an average jock with low level test...

But I'm only an average jock with low level test work under my belt. Not up the the standard of a real TP.

I have no problem with the pencil trick .. it's just that I get confused when upside...
Forum: Tech Log
24th Aug 2012, 03:06
Replies: 388
Views: 99,887
Posted By john_tullamarine

Pass, brother.

Pass, brother.
Forum: Tech Log
24th Aug 2012, 02:13
Replies: 388
Views: 99,887
Posted By john_tullamarine

.. an inclinometer knows naught about AoA, the...

.. an inclinometer knows naught about AoA, the latter involving the windy bits as well as where the wing might be pointed ? and not much about anything if there be other than gravitational forces...
Forum: Tech Log
24th Aug 2012, 00:11
Replies: 388
Views: 99,887
Posted By john_tullamarine

Old school AoA angle and inertial speed.. ...

Old school AoA angle and inertial speed..

Could be just my dotage and old timer's disease taking hold again .. but, how does that work ?

I can follow the argument for body angle (rather...
Forum: Tech Log
6th Aug 2012, 21:47
Replies: 388
Views: 99,887
Posted By john_tullamarine

Many times this exercise was carried out at...

Many times this exercise was carried out at merely 500 ft, over the runway!

How quaint. How does one spell "silly" again ?

While specific techniques may vary between Types, the general rule...
Forum: Tech Log
26th Jul 2012, 11:05
Replies: 388
Views: 99,887
Posted By john_tullamarine

why can't the engine accept supersonic air? ...

why can't the engine accept supersonic air?

In subsonic flow, the pressure waves moving upstream from an approaching body have time to cause the air to get out of the road, as it were, without...
Forum: Tech Log
26th Jul 2012, 09:24
Replies: 388
Views: 99,887
Posted By john_tullamarine

.. and the thrust so described is due to the...

.. and the thrust so described is due to the application of gas pressures to the abutting structure.

The graphic gives the story for one engine ie internal story.

Now one has to look at what...
Forum: Tech Log
26th Jul 2012, 06:58
Replies: 388
Views: 99,887
Posted By john_tullamarine

Is there a good article that explains how this...

Is there a good article that explains how this all works?

Really only necessary if you need to be able to run some calculations for design work.

To get a general overview idea, think ...
...
Forum: Tech Log
26th Jul 2012, 05:49
Replies: 388
Views: 99,887
Posted By john_tullamarine

I was talking about ram effect Understood...

I was talking about ram effect

Understood .. but that is a secondary consideration.

The end result of the pressure distribution acting on ancilliary structure can produce a significant...
Forum: Tech Log
26th Jul 2012, 02:45
Replies: 388
Views: 99,887
Posted By john_tullamarine

specifically where it says that it produces "well...

specifically where it says that it produces "well over half the thrust".

If one looks throughout an engine, we get a bunch of pressure variation. Integrating over the various surfaces lets us...
Forum: Tech Log
24th Jul 2012, 22:34
Replies: 388
Views: 99,887
Posted By john_tullamarine

The FAA graphic is a tad useless as it doesn't...

The FAA graphic is a tad useless as it doesn't show the extent of streamline displacement as the cylinder speed cranks up. Indeed, it is more confusing than illuminating in my isolated view.

If...
Showing results 1 to 21 of 21


 
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