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27th Jun 2020, 22:40
Replies: 56
Views: 9,405
Posted By AC103

OK I found this from the WMO Technical...

OK I found this from the WMO Technical Regulations, Volume I - General Meteorological Standards and Recommended Practices
https://library.wmo.int/doc_num.php?explnum_id=9359
...
27th Jun 2020, 22:00
Replies: 56
Views: 9,405
Posted By AC103

Turbulence Deffinitions

Caution resurrection... does anyone know where else this data is defined? I can't seem to find it in the RGL https://rgl.faa.gov/ or the WMO library https://library.wmo.int/ or via ICAO?
Forum: Tech Log
25th Jun 2020, 21:58
Replies: 11
Views: 1,316
Posted By AC103

It is an interesting one. I had a look at the...

It is an interesting one. I had a look at the M20K 252 factory turbo charged so not TN but same air-frame and don't see anything for CAS with altitude, plenty for altitude calibration with altitude...
Forum: Tech Log
25th Jun 2020, 01:30
Replies: 11
Views: 1,316
Posted By AC103

Which factors cause Vy to increase with Altitude

Hi folks,
Does any one know what factors remain in the usual Vy with altitude equation to push Vy to a higher indicated airspeed at altitude for a turbo normalized M20J Mooney?
In other words what...
Forum: Tech Log
29th May 2020, 22:23
Replies: 31
Views: 5,250
Posted By AC103

I disagree with pretty much all of that oggers,...

I disagree with pretty much all of that oggers, as previously clarified. Also there is no tree, no-one is barking and reading and writing is all that we are doing here. Please don't drag this thread...
Forum: Tech Log
28th May 2020, 20:34
Replies: 31
Views: 5,250
Posted By AC103

The majority of other manufactures including...

The majority of other manufactures including Piper for its other aircraft chose to design around the more onerous interpretation that is not in direct conflict with later advice from the FAA and...
Forum: Tech Log
27th May 2020, 22:47
Replies: 31
Views: 5,250
Posted By AC103

It would seem that the majority of manufactures...

It would seem that the majority of manufactures did not and many also provided a good buffer, which is generous of them as Vd is tied to Vc. More understandable in a Husky less so in a commuter.

...
Forum: Tech Log
23rd May 2020, 22:47
Replies: 31
Views: 5,250
Posted By AC103

Indeed as you say the VLA also provides the...

Indeed as you say the VLA also provides the updated guidance on Vc. Adding the context.



Forgive me if I am stating the obvious but as I understand it updating a rule is slow, onerous and...
Forum: Tech Log
22nd May 2020, 20:36
Replies: 31
Views: 5,250
Posted By AC103

Arghem... advent, please read post #2! (All of...

Arghem... advent, please read post #2! (All of the words and numbers..) Thanks 733driver.

Oggers, kind of you to say and thank you for your input, now what is your response to the later...
Forum: Tech Log
22nd May 2020, 11:19
Replies: 31
Views: 5,250
Posted By AC103

How funny, it looks like MAUW could be a Kiwism....

How funny, it looks like MAUW could be a Kiwism. https://www.aviation.govt.nz/assets/publications/gaps/Weight_Balance.pdf



Please do share if you manage to dig them up! ;)
Forum: Tech Log
22nd May 2020, 09:16
Replies: 31
Views: 5,250
Posted By AC103

I agree, "And further provided" has an "AND"...

I agree, "And further provided" has an "AND" operator. It looks like the FAA changed their mind or realized that they hadn't been clear and didn't want to invite a whole load of paper MAUW increases....
Forum: Tech Log
21st May 2020, 10:19
Replies: 31
Views: 5,250
Posted By AC103

Do you have the guidance reference for that one...

Do you have the guidance reference for that one djpil?
All I can find is FAR23's which suggests the opposite:
I assume it doesn't strictly apply to 3.184 but from AC 23-19A - Airframe Guide for...
Forum: Tech Log
20th May 2020, 22:20
Replies: 31
Views: 5,250
Posted By AC103

This is still bugging me. The Dakota also...

This is still bugging me.

The Dakota also has a Vno less than Vc min design limitations.
MAUW=3000
Wing Area=170sqft
Wing Loading=17.65lbs/sqft
Vc design minimum = 38 √17.65 = 159.63 MPH EAS ≈...
Forum: Tech Log
4th Dec 2018, 03:22
Replies: 0
Views: 1,020
Posted By AC103

When was Va invented?

Hi folks, I have been digging around the CARs CFRs and related ACs on Va Vo Vp Vc Vb etc. yes that old chestnut... I haven't been able to locate the reg that introduces Va as a requirement for...
Forum: Tech Log
4th Dec 2018, 02:06
Replies: 31
Views: 5,250
Posted By AC103

Haaaaang on.. I know it doesn't strictly apply to...

Haaaaang on.. I know it doesn't strictly apply to 3.184 but from AC 23-19A - Airframe Guide for Certification of Part 23 Airplanes p.26-27...
Forum: Tech Log
2nd Dec 2018, 10:38
Replies: 0
Views: 541
Posted By AC103

Technical Data for Aircraft Components

Hi folks,

I have been looking though the RGL (https://rgl.faa.gov/) and Google patent search looking for a drawing of the below heated pitot-static head without success.
Does anyone know where we...
Forum: Tech Log
2nd Dec 2018, 03:44
Replies: 31
Views: 5,250
Posted By AC103

From a very knowledgeable friend. Great to bottom...

From a very knowledgeable friend. Great to bottom it out!
Forum: Tech Log
29th Nov 2018, 01:40
Replies: 31
Views: 5,250
Posted By AC103

Thanks Nut, but not sure how that explains the...

Thanks Nut, but not sure how that explains the how the published Vno is 7mph under Vc min for an aircraft of that wing loading?

From the EASA PA-28-181 TCDS you linked:


I wonder if that...
Forum: Tech Log
29th Nov 2018, 00:39
Replies: 31
Views: 5,250
Posted By AC103

For comparison: 182S under 23.335, pretty...

For comparison:

182S under 23.335, pretty close:
Max Structural Cruising 140 Knots IAS (138 Knots CAS)
Wing loading 17.8lbs/sq.ft
33 √ 17.8 = 139kt

Beechcraft F33A under CAR 3.184, well...
Forum: Tech Log
29th Nov 2018, 00:10
Replies: 31
Views: 5,250
Posted By AC103

PA-28-181 Vno below Vc minimum design speed? NOT SOLVED

The PA-28-181 Archer III does not seem to be compliant with Vc min regs, it looks be 7MPH short. Other PA-28s appear OK but not the Archer III:
Vc min for 15lbs/sq.ft wing loading = 147mph EAS...
Forum: Tech Log
27th Nov 2018, 08:23
Replies: 5
Views: 2,621
Posted By AC103

The RGL is awesome! Funny seeing how Vd has...

The RGL is awesome! Funny seeing how Vd has changed from today's 23.335 "The speed increase resulting when, from the initial condition of stabilized flight at VC/MC, the airplane is assumed to be...
Forum: Tech Log
26th Nov 2018, 03:22
Replies: 5
Views: 2,621
Posted By AC103

Wow, an hour from Q to A. Go pprune!...

Wow, an hour from Q to A. Go pprune! https://dotlibrary.specialcollection.net/Contents with a free login looks to be the best free option....
Forum: Tech Log
26th Nov 2018, 00:57
Replies: 5
Views: 2,621
Posted By AC103

Aircraft Certification - CAR 3 effective May 15 1956

Hi folks, I am doing a bit if a dive into how the likes of Vd Vne Vc Vno Va Vfe etc. are derived.

Here is an example from the TCDS for the PA-28-181


I have found the latest CFRs on the...
15th Nov 2018, 21:30
Replies: 54
Views: 30,291
Posted By AC103

Time for a practical application: If we agree...

Time for a practical application:
If we agree that Min Radius = Max Rate then you have just recovered from a flat spin and are now pointing strait at the ground at 80kts and 500ft AGL, do you:

1....
13th Nov 2018, 20:50
Replies: 54
Views: 30,291
Posted By AC103

Islander stated it pretty well but seems to come...

Islander stated it pretty well but seems to come to the same conclusion as me. (wrongly by the looks so far) In fact we were looking through the Hurt text at the aeroclub yesterday trying to figure...
Showing results 1 to 25 of 45
 


 
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