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Search: Posts Made By: EDML
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Forum: Rumours & News
13th Sep 2019, 11:03
Replies: 503
Views: 344,341
Posted By EDML

Lift moves the aileron up when it’s no longer...

Lift moves the aileron up when it’s no longer firmly connected to the other side. It will move up until a balance between lift and loss of lift due to the aileron position is reached. More speed...
Forum: Rumours & News
6th Sep 2019, 08:51
Replies: 503
Views: 344,341
Posted By EDML

Even if the plane is operated privately the type...

Even if the plane is operated privately the type rating is only valid for one year.

There are no operational requirements like a line check but the validity of the TR is the same.
Forum: Rumours & News
3rd Sep 2019, 17:32
Replies: 503
Views: 344,341
Posted By EDML

Well, having seen the pictures of the cockpit...

Well, having seen the pictures of the cockpit area after the crash and seeing the broken and bent fire panel in the dirt with shards of glas it is pretty obvious that the T-handle was ripped of in...
Forum: Rumours & News
30th Aug 2019, 16:49
Replies: 503
Views: 344,341
Posted By EDML

Maybe - but then it should have been briefed. Not...

Maybe - but then it should have been briefed. Not just continue the flight doing a very wide (> 10min) pattern while the engine fire burns through the wing & flight controls.
Being rated on the...
Forum: Rumours & News
22nd Aug 2018, 12:52
Replies: 503
Views: 344,341
Posted By EDML

Of course it might have been a viable plan to...

Of course it might have been a viable plan to keep the engine running as long as possible due to the OEI performance of this aircraft.

However, I would have expected that this plan is discussed by...
Forum: Rumours & News
14th Aug 2018, 15:50
Replies: 503
Views: 344,341
Posted By EDML

According to the preliminary report no one on the...

According to the preliminary report no one on the ground died.
Forum: Rumours & News
14th Aug 2018, 01:43
Replies: 503
Views: 344,341
Posted By EDML

There might be countries in Africa where no one...

There might be countries in Africa where no one really cares about rules and legislation - that does not apply to South Africa, though. CAA works pretty good as one can see reading preliminary report.
Forum: Rumours & News
12th Aug 2018, 14:39
Replies: 503
Views: 344,341
Posted By EDML

When the cable is severed or stretched, both...

When the cable is severed or stretched, both ailerons will be up. Of course that will be a lot of additional drag.

Marcus
Forum: Rumours & News
12th Aug 2018, 01:11
Replies: 503
Views: 344,341
Posted By EDML

This is the link to the report:...

This is the link to the report: http://www.caa.co.za/Accidents%20and%20Incidents%20Reports/ZS-BRV.pdf

Very detailed for a preliminary report and certainly worth reading.

It also contains a high...
Forum: Rumours & News
11th Aug 2018, 19:23
Replies: 503
Views: 344,341
Posted By EDML

The report also supports our theory regarding the...

The report also supports our theory regarding the failure of the ailerons I spotted on one of the videos.
Forum: Rumours & News
22nd Jul 2018, 14:54
Replies: 503
Views: 344,341
Posted By EDML

Not bad given the complexity and high specific...

Not bad given the complexity and high specific output of those engines.
Forum: Rumours & News
20th Jul 2018, 23:04
Replies: 503
Views: 344,341
Posted By EDML

Correct. In the CV-340 with the Hamilton Standard...

Correct. In the CV-340 with the Hamilton Standard constant speed props the RPM / propeller handle will be blue.

No idea if all DC-3 had the white handles as most of them had the Hamilton Standard...
Forum: Rumours & News
20th Jul 2018, 12:23
Replies: 503
Views: 344,341
Posted By EDML

A stretched aileron cable would also have the...

A stretched aileron cable would also have the ailerons (both sides) deflect upwards. The balanced aerodynamic forces on both ailerons keep them centered while in flight.
Forum: Rumours & News
20th Jul 2018, 12:20
Replies: 503
Views: 344,341
Posted By EDML

I would not make any conclusions based on the...

I would not make any conclusions based on the fact what he is filming.

First of all they had an engine problem from the beginning and secondly the burning engine is a lot more likely to attract...
Forum: Rumours & News
20th Jul 2018, 01:11
Replies: 503
Views: 344,341
Posted By EDML

I don‘t think it was jammed. No way to counteract...

I don‘t think it was jammed. No way to counteract a full or almost full left aileron. If it was jammed the other side would have been full down generating the max. possible roll rate to the left. No...
Forum: Rumours & News
20th Jul 2018, 00:34
Replies: 503
Views: 344,341
Posted By EDML

That is because the wing generates lift. The lift...

That is because the wing generates lift. The lift trying to lift the wing will also lift the aileron. The lift is stronger than the airstream on the upper side of the wing.
Forum: Rumours & News
20th Jul 2018, 00:29
Replies: 503
Views: 344,341
Posted By EDML

OK, that makes sense as well. Then it would be in...

OK, that makes sense as well. Then it would be in sync with a camera with 60 or 30 fps when slightly below 2700 RPM.
Forum: Rumours & News
19th Jul 2018, 20:01
Replies: 503
Views: 344,341
Posted By EDML

NTSB ERA11LA117 is a very interesting read. They...

NTSB ERA11LA117 is a very interesting read. They also had problems with the left aileron after an exhaust fire on the left engine.
...
Forum: Rumours & News
19th Jul 2018, 19:51
Replies: 503
Views: 344,341
Posted By EDML

Hi Chris, from what I could find out the...

Hi Chris,
from what I could find out the reduction gear for the R-2800 is 16:9. With a framerate of the camera of 25fps that would be 2666 engine RPM for the prop to look stopped: (25 RPs * 60 * 16)...
Forum: Rumours & News
19th Jul 2018, 18:01
Replies: 503
Views: 344,341
Posted By EDML

I think that is an optical illusion. Watching the...

I think that is an optical illusion. Watching the whole video where that shot was taken from you can see that both ailerons are straight after the aircraft overflew the camera.
Forum: Rumours & News
19th Jul 2018, 15:07
Replies: 503
Views: 344,341
Posted By EDML

I also think that the cable (or one of the...

I also think that the cable (or one of the cables) for the left aileron burned through due to the engine fire. The airstream / lift will then push the aileron all the way up.

That would make any...
Forum: Rumours & News
18th Jul 2018, 21:27
Replies: 503
Views: 344,341
Posted By EDML

The perceived rotation of the props on the video...

The perceived rotation of the props on the video are interferences between the acutal propeller RPM and the video frame rate. When the frame rate is exactly in sync with a full, a 1/3rd or 2/3rd...
Forum: Rumours & News
18th Jul 2018, 20:01
Replies: 503
Views: 344,341
Posted By EDML

Correct. There might be some cross control with...

Correct. There might be some cross control with the rudder full right, but surely not full left aileron. With light GA piston twins even on a single engine go around there is only a bit of aileron...
Forum: Rumours & News
17th Jul 2018, 23:42
Replies: 503
Views: 344,341
Posted By EDML

Looks like the left engine finally failed while...

Looks like the left engine finally failed while they where about to turn base or final (hard to tell as they are making a constant shallow turn.) Maybe that was all they could get turning over the...
Forum: Rumours & News
17th Jul 2018, 20:12
Replies: 503
Views: 344,341
Posted By EDML

Correct. In the video that shows the T/O from...

Correct. In the video that shows the T/O from behind the runway you can see that there is no rudder used after the A/C overflew the camera. Power seems to be evenly distributed.
Forum: Rumours & News
17th Jul 2018, 15:09
Replies: 503
Views: 344,341
Posted By EDML

That was, what I was thinking of. There is no yaw...

That was, what I was thinking of. There is no yaw visible at all. Even if you react very quickly I would expect at least a little yaw at low speed and high power.
Forum: Rumours & News
17th Jul 2018, 15:04
Replies: 503
Views: 344,341
Posted By EDML

So it would rather be V2 then, like with a jet....

So it would rather be V2 then, like with a jet. Anyways, the numbers would be interesting. They seem pretty fast passing the 172 in the 2nd video.
Forum: Rumours & News
17th Jul 2018, 12:33
Replies: 503
Views: 344,341
Posted By EDML

Only airplane with a radial engine I have ever...

Only airplane with a radial engine I have ever flown was a T-6/Harvard (also in South Africa). Of course that is no airliner and it has plenty of power.

Anyways, from your experience would you...
Forum: Rumours & News
17th Jul 2018, 02:23
Replies: 503
Views: 344,341
Posted By EDML

I do know that. However, seeing the very shallow...

I do know that. However, seeing the very shallow climb I seriously doubt they had a positive indication on the VSI. They where desperate to reduce the drag ASAP.
Forum: Rumours & News
16th Jul 2018, 17:00
Replies: 503
Views: 344,341
Posted By EDML

They got the gear up very early while still being...

They got the gear up very early while still being over the runway. That shows that they where aware of the situation pretty soon.
Showing results 1 to 30 of 30


 
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