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Forum: Rotorheads
11th Oct 2020, 12:32
Replies: 19
Views: 1,830
Posted By JohnDixson

Well, you are partially right in that if one...

Well, you are partially right in that if one droops the NR, the pilot has put the engine on whatever the limiter has installed, power-wise, but that isn’t the point Crab made, which is to set the...
Forum: Rotorheads
10th Oct 2020, 12:00
Replies: 19
Views: 1,830
Posted By JohnDixson

Crab has it: "the aim is to produce a change in...

Crab has it: "the aim is to produce a change in the L/D ratio to gain more lift".
6th Oct 2020, 20:40
Replies: 238
Views: 68,359
Posted By JohnDixson

I posted the AF Magazine Daily Report article in...

I posted the AF Magazine Daily Report article in the F-35 vs C130 thread and the powers that be moved it here. The reason I posted it there was this section:
"The second main cause was the tail...
6th Oct 2020, 13:26
Replies: 238
Views: 68,359
Posted By JohnDixson

AF Magazine today:Eglin F-35 Crash Blamed on...

AF Magazine today:Eglin F-35 Crash Blamed on Landing Speed, but Software, Helmet, Oxygen Also Faulted...
5th Oct 2020, 00:00
Replies: 251
Views: 88,391
Posted By JohnDixson

Sycamore, I used that site-must have fat fingered...

Sycamore, I used that site-must have fat fingered one of the inputs. Have to go back there and redo it. Anyway, as to the rest I can see where you are going and I’d guess that some information based...
4th Oct 2020, 19:52
Replies: 251
Views: 88,391
Posted By JohnDixson

A very good friend who has significant experience...

A very good friend who has significant experience in air refueling an HH-53C from a C-130 wondered if a contributing factor might have been sun angle at 1600 local. I looked up a sun angle calculator...
Forum: Rotorheads
3rd Oct 2020, 17:36
Replies: 45
Views: 6,614
Posted By JohnDixson

Crab, sorry for the thread drift: The first GE...

Crab, sorry for the thread drift: The first GE electronic supervisory control for the T-58 came to the USN with the T-58-10, around 1966-67, and was called , ( appropriately according to more than a...
Forum: Rotorheads
3rd Oct 2020, 14:35
Replies: 45
Views: 6,614
Posted By JohnDixson

Globo, you wrote: “In some respects there is no...

Globo, you wrote: “In some respects there is no merit in engineering this out, as this leads to mechanical overcomplication of what is an already complicated device. “
Amen. Fly the Crane from say...
Forum: Rotorheads
3rd Oct 2020, 12:23
Replies: 45
Views: 6,614
Posted By JohnDixson

Globo, not just the airframe-the Gnomes were GE...

Globo, not just the airframe-the Gnomes were GE T-58ís built under license too, as I recall being told.
Forum: Rotorheads
2nd Oct 2020, 11:42
Replies: 45
Views: 6,614
Posted By JohnDixson

Globo, no the same phycics apply and they hover...

Globo, no the same phycics apply and they hover left wheel low.

Only aircraft that addressed the issue to my knowledge are the Sikorsky S-64 Skycrane and the Kaman UH-2 ( recall being told that...
Forum: Rotorheads
27th Sep 2020, 16:11
Replies: 1
Views: 920
Posted By JohnDixson

SAS, the article is interesting in that it rather...

SAS, the article is interesting in that it rather emphasizes the flight testing to come, not mentioning that it has been flying on another helicopter platform for five years as of next month.
Forum: Rotorheads
3rd Sep 2020, 13:56
Replies: 22
Views: 3,359
Posted By JohnDixson

As I recall, the aircraft cargo hook design load...

As I recall, the aircraft cargo hook design load includes a 2.5 G factor. Thats a number I definitely recall from the UH-60. The 92 will have the appropriate FAA requirement and that may include some...
Forum: Rotorheads
3rd Sep 2020, 12:38
Replies: 22
Views: 3,359
Posted By JohnDixson

The M model has the 9k hook standard.

The M model has the 9k hook standard.
Forum: Rotorheads
29th Aug 2020, 18:24
Replies: 9
Views: 4,150
Posted By JohnDixson

SAS’ comment reminded of the Vietnam lessons that...

SAS’ comment reminded of the Vietnam lessons that were then translated into the requirements for the next generation US Army vertical lift machines, i.e., requirements specifying crashworthiness...
Forum: Rotorheads
14th Aug 2020, 21:26
Replies: 26
Views: 6,483
Posted By JohnDixson

Ring Gear: Great post and educational/maintenance...

Ring Gear: Great post and educational/maintenance information re some new equipment that must be a huge help in use.

One comment re whirl towers, at least as promulgated within SA during my tour...
Forum: Rotorheads
11th Aug 2020, 23:21
Replies: 26
Views: 6,483
Posted By JohnDixson

The photography is very limiting, but the stills...

The photography is very limiting, but the stills and the video “seem” ( to me anyhow ) to indicate the right hand crewman is looking down, i.e., we are seeing the top of his helmet. Wonder what was...
Forum: Rotorheads
10th Aug 2020, 21:32
Replies: 26
Views: 6,483
Posted By JohnDixson

Ring gear makes the main point, i.e., that the...

Ring gear makes the main point, i.e., that the tip weights are not in/on the tip cap but at the outboard structure where the tip cap is mounted.

Somewhere out there some 60 pilot has smashed a...
Forum: Rotorheads
12th Jul 2020, 14:36
Replies: 118
Views: 19,907
Posted By JohnDixson

RG, thanks, but a message saying I was not...

RG, thanks, but a message saying I was not allowed to view drafts was all that presented itself. No worries: I had 39 years of chasing vibrations of all sorts. Unless you have discovered and are...
Forum: Rotorheads
12th Jul 2020, 12:41
Replies: 118
Views: 19,907
Posted By JohnDixson

GB: Yes, easy to differentiate between the two. A...

GB: Yes, easy to differentiate between the two. A TR vibration is high frequency felt in the pedals. A MRB vibration is not high frequency and is not felt in the pedals.

Yes ....and possibly not....
Forum: Rotorheads
11th Jul 2020, 13:35
Replies: 146
Views: 51,987
Posted By JohnDixson

Good post, and I look forward to the response...

Good post, and I look forward to the response from the RVguy. You two are clearing the air a bit re FBW, and there was one issue touched on that has been a problem to me for decades-the “out of...
Forum: Rotorheads
9th Jul 2020, 13:14
Replies: 146
Views: 51,987
Posted By JohnDixson

CTR, allow me to go further. In thinking about my...

CTR, allow me to go further. In thinking about my response above I can see where it might be misinterpreted.

The Bell folks certainly have had meaningful experience with FBW technology. When the...
Forum: Rotorheads
9th Jul 2020, 00:14
Replies: 146
Views: 51,987
Posted By JohnDixson

CTR-sorry-it was a longer,involved sentence: ...

CTR-sorry-it was a longer,involved sentence:

“Provokes a question. The 525 certification process was via " Special Conditions ", I think, as Part 29 and the attendant Advisory Circular do not yet...
Forum: Rotorheads
8th Jul 2020, 18:14
Replies: 146
Views: 51,987
Posted By JohnDixson

FAA and Controls

CTR wrote: "During informal discussions with the FAA, Bell was advised that the FAA would not certify a unique trim cyclic configuration for a helicopter."

Provokes a question. The 525...
Forum: Rotorheads
1st Jul 2020, 00:20
Replies: 146
Views: 51,987
Posted By JohnDixson

Back to this thread subject for a moment, IFMU,...

Back to this thread subject for a moment, IFMU, but several of the media reports say that the Canadian military authorities are getting the 92 MHP ships back flying having changed nothing but some...
Forum: Rotorheads
30th Jun 2020, 16:12
Replies: 146
Views: 51,987
Posted By JohnDixson

Was in a discussion with a person closely...

Was in a discussion with a person closely connected with the MHP qualification testing and who noted that one of the previous posts included an error as to the configuration of the Comanche...
Showing results 1 to 25 of 759
 


 
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