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Search: Posts Made By: khorton
Showing results 1 to 35 of 53
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Forum: Tech Log
7th May 2019, 03:13
Replies: 52
Views: 20,986
Posted By khorton

I heard this story many, many years back when I...

I heard this story many, many years back when I was flying S-2s in the Canadian military. This was back in the days before GPS, and when IRS had spining gyros and gimbles - no fancy ring laser gryo...
Forum: Rumours & News
12th Jul 2017, 13:16
Replies: 1,219
Views: 776,530
Posted By khorton

CTV News has an interesting video with some...

CTV News has an interesting video with some background info and a bit of speculation:

CTV News Channel: 'Situation was unusual' | CTV News...
Forum: Rumours & News
24th Apr 2017, 23:43
Replies: 27
Views: 18,457
Posted By khorton

The Twin Otter Series 100, 200 & 300 were...

The Twin Otter Series 100, 200 & 300 were approved to the US Civil Air Regulations Part 3, at amendment 8, which allowed Vr to be below VMCA. Certain later operating rules applicable to some...
Forum: Rumours & News
16th Jan 2017, 18:36
Replies: 21
Views: 7,908
Posted By khorton

The resident Canada Geese do learn the local...

The resident Canada Geese do learn the local flight patterns, and adjust their activities to avoid high risk areas. A good friend (since passed away) was the head wildlife control expert in...
Forum: Rumours & News
12th Jan 2017, 23:31
Replies: 88
Views: 63,211
Posted By khorton

I know of one company that has been talking about...

I know of one company that has been talking about implementing a lower thrust all-engine go-around for several years. But they haven't actually implemented anything.

Talk is cheap. What will it...
Forum: Rumours & News
16th Dec 2016, 22:17
Replies: 335
Views: 365,811
Posted By khorton

That is all well and good if you suspect a...

That is all well and good if you suspect a failure. But in this case no one suspected that the left attitude display had failed.

The attitude miscompute flags on the PFD on the CRJs are much less...
Forum: Rumours & News
26th Nov 2016, 11:50
Replies: 23
Views: 20,621
Posted By khorton

Keep in mind that the resolution on that TCAS...

Keep in mind that the resolution on that TCAS altitude display is only 100 ft (ie. ±50), and there could be up to 50 ft error in the baro altitude that feeds the TCAS on each aircraft. So, if it...
Forum: Tech Log
22nd Nov 2016, 00:51
Replies: 18
Views: 4,068
Posted By khorton

The extended flaps will have higher drag and thus...

The extended flaps will have higher drag and thus require higher fuel flow. Which published data are they using to determine the expected fuel flow in the hold? Are these guys carrying more holding...
Forum: Rumours & News
11th Oct 2016, 23:49
Replies: 35
Views: 24,052
Posted By khorton

Hopefully the elevator will be moving. The idea...

Hopefully the elevator will be moving. The idea is that the elevator moves in response to the trim tab movement, and this causes the aircraft to pitch up or down.

If the elevator is locked...
Forum: Tech Log
27th Aug 2016, 01:07
Replies: 64
Views: 15,883
Posted By khorton

In the real world, the wind changes as the...

In the real world, the wind changes as the altitude changes when descending. These changes are sometimes quite significant. I find it works best to look out the window, and vary the bank angle and...
Forum: Freight Dogs
19th Aug 2016, 23:14
Replies: 356
Views: 166,972
Posted By khorton

It depends on which web site you want to believe....

It depends on which web site you want to believe. This site (http://www.military.com/equipment/ch-47d-chinook) lists the max sling capacity of a CH-47D as 26,000 lb, or 11.8 tonnes.
Forum: Rumours & News
12th Jun 2016, 19:22
Replies: 55
Views: 37,322
Posted By khorton

The root of the problem seems to be in the AHRS,...

The root of the problem seems to be in the AHRS, which is I believe is a Rockwell-Collins product, TSO'd by the FAA.
Forum: Rumours & News
12th Jun 2016, 14:40
Replies: 55
Views: 37,322
Posted By khorton

Which agency approved the AHRS that apparently...

Which agency approved the AHRS that apparently requires GPS to function correctly?
Forum: Tech Log
9th Jun 2016, 11:27
Replies: 8
Views: 5,075
Posted By khorton

I'll take this design over the earlier Collins...

I'll take this design over the earlier Collins AHRS, which only used pitot-static inputs to help stabilize the AHRS attitude. There have been more than one event of pitot icing on CRJs leading to...
Forum: Tech Log
2nd Apr 2016, 15:26
Replies: 18
Views: 3,048
Posted By khorton

Mass appears the formulae for both kinetic energy...

Mass appears the formulae for both kinetic energy and potential energy. The mass terms cancel out when you look at the vertical speed needed to get rid of KE at a particular rate. As you note,...
Forum: Tech Log
1st Apr 2016, 16:57
Replies: 18
Views: 3,048
Posted By khorton

Actually, a deceleration of 1 kt/s IAS is 2 kt/s...

Actually, a deceleration of 1 kt/s IAS is 2 kt/s TAS (or more) at high altitude. Kinetic energy is a function of TAS^2. Getting rid of more than 2 kt/s of TAS at high speed often requires a climb...
Forum: Accidents and Close Calls
1st Apr 2016, 16:49
Replies: 80
Views: 61,119
Posted By khorton

He probably said "légère assiette cabrée", not...

He probably said "légère assiette cabrée", not "légère assiette cambrée", and it was transcribed incorrectly. "légère assiette cabrée" => "slightly nose high attitude"
Forum: ATC Issues
11th Feb 2016, 19:45
Replies: 44
Views: 19,155
Posted By khorton

The Canadian experience

From my view in Canada, as a professional pilot and a private aircraft owner, our privatized ATC system is a huge improvement from the days when it was government owned and run. Nav Canada has had...
Forum: Rumours & News
16th Jan 2016, 22:42
Replies: 335
Views: 365,811
Posted By khorton

That incident was caused by corrosion on the...

That incident was caused by corrosion on the horizontal stab trim control unit (HSTCU). There were several similar incidents, which triggered the AD...
Forum: Rumours & News
14th Jan 2016, 15:46
Replies: 335
Views: 365,811
Posted By khorton

There are three separate hydraulic actuators for...

There are three separate hydraulic actuators for each elevator. The servo valve controls have jam-tolerant mechanisms, so a jam in one servo valve control will not cause the whole system to be...
Forum: Rumours & News
14th Jan 2016, 09:53
Replies: 335
Views: 365,811
Posted By khorton

There are stabilizer trim disconnect buttons on...

There are stabilizer trim disconnect buttons on each control wheel. The red "PITCH DISC" T handle on the left, front of the centre console is for jams in the control linkages in the pitch axis - it...
Forum: Rumours & News
13th Jan 2016, 22:27
Replies: 335
Views: 365,811
Posted By khorton

The CRJ trim system, by design, should detect...

The CRJ trim system, by design, should detect un-commanded motion and shutdown. The problem referred to by some earlier posts is that there was a manufacturing defect at a supplier, and the circuit...
Forum: Tech Log
11th Nov 2015, 14:52
Replies: 6
Views: 2,379
Posted By khorton

It would come down to the reliability of the...

It would come down to the reliability of the protective function, whether it can be overridden by the pilots and whether the manufacturer wishes to have dispatch allowed with that function...
Forum: Rumours & News
5th Nov 2015, 01:01
Replies: 2,082
Views: 2,494,501
Posted By khorton

I work as a test pilot, and have flown flight...

I work as a test pilot, and have flown flight tests on various Airbus aircraft (but not the A321, although its control laws are similar to models I have flown).

Assuming the FBW system was in...
Forum: Tech Log
2nd Jun 2015, 13:06
Replies: 6
Views: 2,032
Posted By khorton

The birds have to learn by making mistakes, just...

The birds have to learn by making mistakes, just like humans. I was watching some blue jays come in to land at a raised platform feeder in our back yard one day, with a 25 kt wind. The platform had...
Forum: Rumours & News
7th Feb 2015, 21:47
Replies: 748
Views: 713,413
Posted By khorton

The torque fluctuations in the FDR data are...

The torque fluctuations in the FDR data are interesting.

NH2 looks like it went to roughly 80%, if I'm reading it correctly, which must be well above idle, but possibly low enough to cause the...
Forum: Rumours & News
19th Jan 2015, 20:42
Replies: 3,923
Views: 4,438,303
Posted By khorton

I'm not sure what your point is, but all the...

I'm not sure what your point is, but all the Airbus prototypes I've been on have had crew escape hatches. They would be used in case something went very badly during any of the many stall tests that...
Forum: Questions
2nd Jan 2015, 15:41
Replies: 8
Views: 8,684
Posted By khorton

The torque would probably rise to 1200 to 1250. ...

The torque would probably rise to 1200 to 1250. After it stablizes you can then gently adjust the power lever to get 1315.


The PT-6 engine in the C90 has a tendency for the ITT to increase...
Forum: Rumours & News
2nd Jan 2015, 10:27
Replies: 3,923
Views: 4,438,303
Posted By khorton

The big thing affecting recovery from a stall at...

The big thing affecting recovery from a stall at high altitude is that there is very high drag at such low speed, and little thrust available from the engines due to the low air density. You need to...
Forum: Questions
1st Jan 2015, 00:28
Replies: 8
Views: 8,684
Posted By khorton

The KingAir C90A is one of the types that I fly...

The KingAir C90A is one of the types that I fly occasionally. At sea level, the torque would go well above 1315 if you pushed the power levers to the stop, so you must be careful to set no more than...
Forum: Rumours & News
31st Dec 2014, 23:11
Replies: 3,923
Views: 4,438,303
Posted By khorton

It is interesting to compare the accident rates...

It is interesting to compare the accident rates of the FBW Airbus products against the B747 Classic and DC-10. If we can believe the data on AirSafe.com...
Forum: Rumours & News
15th Nov 2014, 20:54
Replies: 281
Views: 221,518
Posted By khorton

130 kt CAS is Mach 1 at 77,565 ft. 130 kt CAS at...

130 kt CAS is Mach 1 at 77,565 ft. 130 kt CAS at 60,000 ft would be Mach 0.70.
Forum: Rumours & News
3rd Nov 2014, 19:55
Replies: 281
Views: 221,518
Posted By khorton

The problem is that you must be 100% sure you can...

The problem is that you must be 100% sure you can feather the tail for reentry, or you will die. If there are too many safety interlocks that can prevent the tail from feathering, you run the risk...
Forum: Rumours & News
3rd Nov 2014, 09:13
Replies: 281
Views: 221,518
Posted By khorton

It seems quite strange to me that their...

It seems quite strange to me that their procedures called for unlocking the tail feathers at M1.4. I would have thought that you wouldn't want to unlock the feathers until you were at a point in...
Forum: Rumours & News
14th Mar 2014, 13:05
Replies: 11,831
Views: 24,179,857
Posted By khorton

What is the source of FL295 as the altitude? If...

What is the source of FL295 as the altitude? If it is from primary radar, keep in mind that the altitude will be quite approximate, and that it will be in geometric altitude (like you would measure...
Showing results 1 to 35 of 53
 
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