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Search: Posts Made By: stressmerchant
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4th Apr 2021, 10:37
Replies: 9
Views: 954
Posted By stressmerchant

I've got one of the Victorinox "Rescue Tools" in...

I've got one of the Victorinox "Rescue Tools" in a zipped upper arm pocket of my flightsuit. I've also seen people with "box cutters" stashed in the cockpit for cutting belts.
13th Apr 2020, 09:08
Replies: 2
Views: 700
Posted By stressmerchant

Not my area of expertise, but in my copy of...

Not my area of expertise, but in my copy of Handling the Big Jets by Davies (3rd edition), he mentions fuel dippers as a means of preventing damage from excessively high turbine temperatures. If I...
9th Mar 2020, 10:03
Replies: 42
Views: 1,969
Posted By stressmerchant

The flow behind the propeller is anything but...

The flow behind the propeller is anything but orderly. Many years ago I had to do some work with the stability of a twin turboprop. The simplistic view of the propeller slipstream may envisage a...
2nd Mar 2020, 12:28
Replies: 42
Views: 1,969
Posted By stressmerchant

I'm not sure exactly what you mean by "detected",...

I'm not sure exactly what you mean by "detected", but the bulk of the research on the forces normal to the propeller axis of rotation was done in wind tunnels by groups such as NACA. The usual...
22nd Jul 2019, 10:48
Replies: 53
Views: 24,506
Posted By stressmerchant

Has CASA actually issued an AD? I don't see it on...

Has CASA actually issued an AD? I don't see it on the website, maybe I missed it. There's a media release saying ops are suspended, but is that considered an AD?

May seem like a minor distinction,...
21st Jul 2019, 11:49
Replies: 53
Views: 24,506
Posted By stressmerchant

As a matter of interest, I see the CASA...

As a matter of interest, I see the CASA announcement says that they have sent an airworthiness engineer to Sweden to gather data....
9th Jun 2019, 23:55
Replies: 46
Views: 23,328
Posted By stressmerchant

Pg 14 suggests that they did consider FOD?

Pg 14 suggests that they did consider FOD?
7th Jan 2018, 05:51
Replies: 10
Views: 5,480
Posted By stressmerchant

I'm saddened to hear of his passing. I only met...

I'm saddened to hear of his passing. I only met him a few times, but I always enjoyed chatting to him about the various aircraft designs. Without doubt an outstanding contributor to Australian...
24th Jun 2017, 10:18
Replies: 2
Views: 1,579
Posted By stressmerchant

Well done HD. We need to have a braai and some...

Well done HD. We need to have a braai and some Guinness.
Forum: Jet Blast
2nd Dec 2016, 10:24
Replies: 63
Views: 6,691
Posted By stressmerchant

A few years ago I had to deal with several marine...

A few years ago I had to deal with several marine scientists.

My considered opinion is that they fell somewhere between astrologers and the flat earth society. Maybe closer to to astrologers, I...
12th Dec 2014, 10:10
Replies: 0
Views: 3,191
Posted By stressmerchant

FTE - Practical max age on entry

I'm trying to make some life choices, and would be interested in the opinion of some of the experienced flight test people on here.

To give some background: I originally qualified as an...
15th Sep 2014, 12:21
Replies: 1
Views: 4,953
Posted By stressmerchant

Tim Mace

It is with sadness that I repost this message from the Parachute Association of South Africa:



Tim was an instructor and mentor to me in skydiving, and also gave me a lot of enouragement in my...
3rd Sep 2014, 10:57
Replies: 19
Views: 13,979
Posted By stressmerchant

I can attest to that. Over 20 years since...

I can attest to that. Over 20 years since graduating and still trying...
Forum: Tech Log
8th Jun 2013, 07:48
Replies: 40
Views: 11,001
Posted By stressmerchant

When I was an undergraduate we had a guest...

When I was an undergraduate we had a guest lecture by very senior design engineer who referred to this "everyone together" approach - apparently it was considered to be the best way of ensuring ease...
Forum: Tech Log
6th Jun 2013, 12:26
Replies: 40
Views: 11,001
Posted By stressmerchant

Thanks for some good info - I remember the...

Thanks for some good info - I remember the drawing offices at my old work filled with lots of boards and hard working men and women. No computers ;-)

My impression is that the CAD tools sometimes...
Forum: Tech Log
3rd Mar 2013, 08:50
Replies: 30
Views: 10,518
Posted By stressmerchant

Vo is a "recent" change - introduced in the late...

Vo is a "recent" change - introduced in the late 90s IIRC. The change was due to the difference between the "pilot" and "engineer" understanding of Va - Vo is closer to the (incorrect) concept of Va...
Forum: Tech Log
2nd Mar 2013, 04:14
Replies: 30
Views: 10,518
Posted By stressmerchant

I'd have to disagree with you on that one. Va is...

I'd have to disagree with you on that one. Va is a single declared speed, used to ensure that the control surfaces are not subject to excessive loads. I am familar with the wording of the FAA...
Forum: Jet Blast
23rd Dec 2012, 02:34
Replies: 15
Views: 2,155
Posted By stressmerchant

IIRC Manfred von Richthofen began his military...

IIRC Manfred von Richthofen began his military career in the Uhlans.
20th Nov 2012, 09:54
Replies: 6
Views: 2,777
Posted By stressmerchant

Thanks folks, that's some good info.

Thanks folks, that's some good info.
19th Nov 2012, 07:28
Replies: 6
Views: 2,777
Posted By stressmerchant

Thanks for that. The strain gauge...

Thanks for that.

The strain gauge manufcaturer supplies a gauge factor, which defines the gauge characteristics. Where I am unsure is how the overall system is calibrated, ie gauge plus bridge and...
16th Nov 2012, 08:02
Replies: 6
Views: 2,777
Posted By stressmerchant

Calibration of Strain Gauges

Following a work discussion today:

If one wishes to use strain gauge data as part of certification data, how does one calibrate the strain gauge?

If the data involves airspeed, the...
18th Aug 2012, 02:34
Replies: 23
Views: 8,286
Posted By stressmerchant

in 1992 I applied for a position at SAA. My...

in 1992 I applied for a position at SAA. My application was rejected, with the reason being something along the lines of "your employment at this company would not contribute towards the equity...
10th Jul 2012, 10:34
Replies: 7
Views: 4,424
Posted By stressmerchant

Try one of these: GCDC X16-1C...

Try one of these:

GCDC X16-1C Usb-Accelerometer 3-axis Data Recorder (http://www.gcdataconcepts.com/xlr8r-1.html)
Forum: Tech Log
8th Jan 2012, 08:56
Replies: 168
Views: 36,779
Posted By stressmerchant

I thought that the ability to navigate with VOR...

I thought that the ability to navigate with VOR radial info was a prerequisite for IFR clearance.
Forum: Jet Blast
9th Dec 2011, 05:47
Replies: 151
Views: 24,553
Posted By stressmerchant

About a year ago I had an aerobatic aircraft...

About a year ago I had an aerobatic aircraft hangared at a small field in South Africa. There was a general rule that airside people had to wear high viz vests, except for pilots and passengers.
...
Showing results 1 to 25 of 69
 


 
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