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Search: Posts Made By: john_tullamarine
Showing results 1 to 35 of 1000
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Forum: Tech Log
26th Apr 2024, 23:21
Replies: 28
Views: 10,662
Posted By john_tullamarine

.... which suggests that the empty weight CG was...

.... which suggests that the empty weight CG was wrong. Time for a reweigh.
Forum: The Pacific: General Aviation & Questions
25th Apr 2024, 05:36
Replies: 2
Views: 1,735
Posted By john_tullamarine

We are more frequently reminded of that final...

We are more frequently reminded of that final appointment as we age. Can't recall if I met David but knew Bill quite well in years gone by ... Thoughts go to the family.
Forum: Tech Log
25th Apr 2024, 05:28
Replies: 28
Views: 10,662
Posted By john_tullamarine

One important consideration relates to what the...

One important consideration relates to what the empty W&B actual data is.

Without boring you with this and that, suffice it to say that, if the starting weight and CG is not reasonably accurate,...
Forum: Australia, New Zealand & the Pacific
23rd Apr 2024, 07:23
Replies: 6
Views: 3,117
Posted By john_tullamarine

Vale, Ken, a fine chap.. Thanks for the...

Vale, Ken, a fine chap.. Thanks for the information, R.
Forum: Tech Log
22nd Apr 2024, 11:32
Replies: 47
Views: 3,409
Posted By john_tullamarine

A comment. I know both zzuf and megan and each...

A comment. I know both zzuf and megan and each is highly regarded in his field. In particular, l would be very careful arguing with zzuf on matters relating to certification flying.
Forum: Tech Log
14th Apr 2024, 10:47
Replies: 5
Views: 1,030
Posted By john_tullamarine

Some thoughts, if I may ? (a) OEI, the...

Some thoughts, if I may ?

(a) OEI, the landing climb case is not a useful option. That is to say, you need a commit point in mind for when the wheels are down and landing flap is taken. One of...
Forum: Tech Log
14th Apr 2024, 10:24
Replies: 18
Views: 1,515
Posted By john_tullamarine

Trying to lump things into a simplistic "so many...

Trying to lump things into a simplistic "so many seconds to a specific speed" probably is not a great deal of value for the wide range of jet performance seen these days.

The military places some...
Forum: Safety, CRM, QA & Emergency Response Planning
26th Mar 2024, 01:03
Replies: 36
Views: 7,700
Posted By john_tullamarine

This thread has been and continues to be an...

This thread has been and continues to be an education; adding knowledge and improving understanding.

Hear, hear !
Forum: Safety, CRM, QA & Emergency Response Planning
17th Mar 2024, 00:43
Replies: 36
Views: 7,700
Posted By john_tullamarine

Perhaps you might follow Centaurus's path (among...

Perhaps you might follow Centaurus's path (among others). John has collected a voluminous quantity of useful reports etc., over the years. It is his practice to distribute copies to students for...
Forum: The Pacific: General Aviation & Questions
5th Mar 2024, 21:55
Replies: 3
Views: 1,743
Posted By john_tullamarine

.. and another of the old group shuffles off ... ...

.. and another of the old group shuffles off ... fair winds, Noise, smooth landings.
Forum: Tech Log
22nd Feb 2024, 22:30
Replies: 28
Views: 2,603
Posted By john_tullamarine

I suppose you all know that there is an app for...

I suppose you all know that there is an app for TAS in the Apple world.

(shakes head)

The humble nav computer has been doing it for 80-odd years and it costs nickels and dimes compared to the...
Forum: Tech Log
22nd Feb 2024, 00:18
Replies: 28
Views: 2,603
Posted By john_tullamarine

details show TAT/OAT Temperature rise is...

details show TAT/OAT

Temperature rise is mach dependent. At low MN, characteristic of many of the WW2 bombers, it wasn't really a major concern. If it were, the equations were known and the...
Forum: Tech Log
21st Feb 2024, 18:34
Replies: 28
Views: 2,603
Posted By john_tullamarine

Jim, You really are making things...

Jim,

You really are making things complicated for yourself. Why not just use the equation for density (from any aerodynamics text) ? Also, the 118.8 ft/C° dev factor is very rough and ready...
Forum: Tech Log
21st Feb 2024, 09:33
Replies: 28
Views: 2,603
Posted By john_tullamarine

The compressibility correction is different ...

The compressibility correction is different

This is a new one for me, also. My take -

(a) the early instrument makers were not able to model the full equations into an analogue device (and,...
Forum: Tech Log
21st Feb 2024, 04:11
Replies: 28
Views: 2,603
Posted By john_tullamarine

Ah, slugs/cubic foot - real numbers ! ...

Ah, slugs/cubic foot - real numbers !

However, the computer calculation does it straight from the equation for density via the sigma variable. One just plugs in the values in the wheel and the...
Forum: Tech Log
19th Feb 2024, 20:14
Replies: 28
Views: 2,603
Posted By john_tullamarine

Back in the day, military folks used whichever...

Back in the day, military folks used whichever nav computer to run the sums (either Dalton for the Allies or Knemeyer for the Axis). As a sidenote, the massive penetration into the market of these...
Forum: The Pacific: General Aviation & Questions
2nd Feb 2024, 00:16
Replies: 20
Views: 3,029
Posted By john_tullamarine

Have a look on the caravan and 4WD sites and you...

Have a look on the caravan and 4WD sites and you will read more than you can fit in in one day ....
Forum: Tech Log
29th Jan 2024, 01:32
Replies: 5
Views: 1,327
Posted By john_tullamarine

I know naught of the aircraft in question and the...

I know naught of the aircraft in question and the video is a bit average to pick detail.

Possibly (?) a gurney flap ? Gurney flap - Wikipedia (https://en.wikipedia.org/wiki/Gurney_flap)
Forum: Medical & Health
16th Jan 2024, 01:28
Replies: 8
Views: 1,174
Posted By john_tullamarine

Probably more suitable for this thread to be on...

Probably more suitable for this thread to be on Medical ?
Forum: Tech Log
14th Jan 2024, 07:57
Replies: 19
Views: 2,528
Posted By john_tullamarine

Ah, but not once did you fall into the trap of...

Ah, but not once did you fall into the trap of having the crosswind from the wrong side ....... (unless you were primed for the accel-stop).
Forum: Tech Log
14th Jan 2024, 04:39
Replies: 19
Views: 2,528
Posted By john_tullamarine

Or, like the nose up pitching moment which can be...

Or, like the nose up pitching moment which can be generated by a higher powered propeller machine at high incidence (which, in turn, may create some missed approach long stab problems requiring a...
Forum: The Pacific: General Aviation & Questions
9th Jan 2024, 21:22
Replies: 59
Views: 14,498
Posted By john_tullamarine

An interesting thread and similar to many others...

An interesting thread and similar to many others over the years ...

Several of the more experienced folk (eg Flying Bear, Duck Pilot, Compressor Stall; I know who those guys are and they do have...
Forum: Private Flying
6th Jan 2024, 05:47
Replies: 28
Views: 11,609
Posted By john_tullamarine

In the good old days, many light aircraft had...

In the good old days, many light aircraft had naught but the OEM's guidance - some had naught, full stop, with anything of vital interest being specified in the CofA.

As things evolved, the OEM...
Forum: Australia, New Zealand & the Pacific
5th Jan 2024, 07:11
Replies: 6
Views: 2,206
Posted By john_tullamarine

We can fix that without too much fuss. Please...

We can fix that without too much fuss. Please do make another post or two with some time for one of us to OK them in turn.
Forum: Australia, New Zealand & the Pacific
5th Jan 2024, 02:39
Replies: 6
Views: 2,206
Posted By john_tullamarine

Vale, Max

Vale, Max
Forum: Australia, New Zealand & the Pacific
31st Dec 2023, 05:41
Replies: 3
Views: 1,690
Posted By john_tullamarine

STARS were in vogue back in the late 80s

STARS were in vogue back in the late 80s
Forum: Tech Log
30th Dec 2023, 09:27
Replies: 43
Views: 5,593
Posted By john_tullamarine

#21. Perhaps the inspiration for Ken Maynard's...

#21. Perhaps the inspiration for Ken Maynard's old Ettamogah Pub cartoon with the punchline "yer right, Taffy, that engine IS missing". If I can find it, I'll post it.
Forum: Tech Log
17th Dec 2023, 08:17
Replies: 25
Views: 5,154
Posted By john_tullamarine

All's fine, pass, brother.

All's fine, pass, brother.
Forum: Tech Log
17th Dec 2023, 05:28
Replies: 25
Views: 5,154
Posted By john_tullamarine

Knowing safetypee's background, I would offer the...

Knowing safetypee's background, I would offer the comment that he knows a few things about certification matters ..... his counsel is well worth heeding.
Forum: The Pacific: General Aviation & Questions
12th Dec 2023, 06:58
Replies: 409
Views: 112,122
Posted By john_tullamarine

I'm not one to indulge in itinerant banning but...

I'm not one to indulge in itinerant banning but this is getting close to needing something along those lines, methinks. Can we just cool things down a bit, guys, and agree to disagree.
Forum: The Pacific: General Aviation & Questions
3rd Dec 2023, 05:50
Replies: 409
Views: 112,122
Posted By john_tullamarine

Perhaps we've exhausted the mayday deliberations...

Perhaps we've exhausted the mayday deliberations and can move on to other matters associated with the mishap ?

If I may rephrase that ... there has been more than an adequate range of comments...
Forum: The Pacific: General Aviation & Questions
2nd Dec 2023, 09:38
Replies: 409
Views: 112,122
Posted By john_tullamarine

Perhaps we've exhausted the mayday deliberations...

Perhaps we've exhausted the mayday deliberations and can move on to other matters associated with the mishap ?
Forum: Aviation History and Nostalgia
26th Nov 2023, 10:58
Replies: 9
Views: 1,298
Posted By john_tullamarine

I never cease to be amazed - utterly - by the...

I never cease to be amazed - utterly - by the wealth of knowledge and capability within the PPRuNe sandpit.
Forum: The Pacific: General Aviation & Questions
26th Nov 2023, 08:37
Replies: 56
Views: 8,151
Posted By john_tullamarine

I have never had a problem with a bit of thread...

I have never had a problem with a bit of thread drift as it invariably dies down after a few posts. Different matter if it goes massively off the rails or is not of a nice sort of nature ...
Forum: The Pacific: General Aviation & Questions
26th Nov 2023, 07:46
Replies: 56
Views: 8,151
Posted By john_tullamarine

would have been the original run T20. Good...

would have been the original run T20.

Good sir, now you're really stretching the memory cells. If I recall anywhere near correctly, I vaguely remember the T20 as being the Tiger Cub 200cc single...
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