PPRuNe Forums - Search Results

Go Back  PPRuNe Forums > Search Forums
Reload this Page >

Search Results

 
Search: Posts Made By: JohnDixson
Showing results 1 to 35 of 880
Search took 0.03 seconds.
Forum: Rotorheads
30th Nov 2022, 12:12
Replies: 16
Views: 3,894
Posted By JohnDixson

Dunno, Crab: if you’re talking gators, crocs and...

Dunno, Crab: if you’re talking gators, crocs and lawyers, it could be about our, without doubt, most litigious state-Florida.
Forum: Rotorheads
26th Oct 2022, 11:07
Replies: 272
Views: 66,642
Posted By JohnDixson

Sycamore, having watched the US RAH-66 program at...

Sycamore, having watched the US RAH-66 program at close hand, it is easy to sympathize.
Forum: Rotorheads
25th Oct 2022, 19:35
Replies: 272
Views: 66,642
Posted By JohnDixson

Has the RAF codified their requirements and...

Has the RAF codified their requirements and missions so that competitors can respond accordingly? This discussion revolving around a civil machine or a combat ready machine, or a civil machine in...
Forum: Rotorheads
24th Oct 2022, 21:16
Replies: 272
Views: 66,642
Posted By JohnDixson

“ build to Military Combat Standard “ . But they...

“ build to Military Combat Standard “ . But they don’t quote the standards to which the UH-60 had to meet. I did find a statement in an AW ad that cited the main blades were tested to accept hits...
Forum: Rotorheads
23rd Oct 2022, 16:17
Replies: 150
Views: 24,871
Posted By JohnDixson

Just re-reading some of the earlier posts....

Just re-reading some of the earlier posts. Increasing control force was noted in both collective and cyclic. The subsequent photographic evidence made clear what the collective issue was, which leads...
Forum: Rotorheads
23rd Oct 2022, 11:55
Replies: 65
Views: 13,714
Posted By JohnDixson

Thanks, CTR. Its an interesting aerodynamic and...

Thanks, CTR. Its an interesting aerodynamic and piloting procedural subject. Perhaps we’ll have the benefit of someone close to the program who can contribute.
Forum: Rotorheads
23rd Oct 2022, 02:10
Replies: 65
Views: 13,714
Posted By JohnDixson

CTR thanks-and let me ask if I understand...

CTR thanks-and let me ask if I understand correctly, that the AEO run on utilizing wing aerodynamic lift is THE AEO procedure but there will also be a rotor autorotation capability offered as a plus?...
Forum: Rotorheads
22nd Oct 2022, 14:43
Replies: 65
Views: 13,714
Posted By JohnDixson

CTR-any idea what the auto descent rate is at max...

CTR-any idea what the auto descent rate is at max weight? Ditto for auto Nr?
Also, did the certification authority require an autorotation landing?
Forum: Rotorheads
19th Oct 2022, 15:14
Replies: 35
Views: 5,280
Posted By JohnDixson

Rotor Tip Behavior

Yes to that. Soon after signing in at SA in 1966, one of the senior handling qualities engineers, Dick McCutcheon was talking about this subject and related some findings in a test done on an S-58,...
Forum: Rotorheads
19th Oct 2022, 12:52
Replies: 35
Views: 5,280
Posted By JohnDixson

Getting old and had to ask for a reminder from...

Getting old and had to ask for a reminder from Nick, 212. The main rotor servos on the 76 were placed in a not normal position for other reasons, and the solution to obtain control orthoganality (...
Forum: Rotorheads
18th Oct 2022, 16:28
Replies: 35
Views: 5,280
Posted By JohnDixson

Hah-I havenít heard that one. A related...

Hah-I havenít heard that one.
A related anecdote from the UH-60 basic controls design: the lead designer for the UTTAS ( original name for that competition ) was a relatively new, quite intelligent...
Forum: Rotorheads
18th Oct 2022, 15:41
Replies: 35
Views: 5,280
Posted By JohnDixson

The new composite rotor with anhedral tip was...

The new composite rotor with anhedral tip was tested in the 1990ís, and yes the word ď anhedral ď means that an outboard tip was tilted downward a few inches. The hover performance improvement was...
Forum: Rotorheads
11th Oct 2022, 04:47
Replies: 5
Views: 1,198
Posted By JohnDixson

The following sentence: “ At Boeing, we...

The following sentence: “ At Boeing, we understand that for the Army to maintain rotorcraft dominance in future Multi-Domain Operations (MDO), the Apache needs to be optimized to complement the...
Forum: Rotorheads
8th Oct 2022, 19:12
Replies: 35
Views: 5,280
Posted By JohnDixson

Crab,don’t know whether this was passed along...

Crab,don’t know whether this was passed along thru Westland, but the initial SH3A ( first 61 model ) did not have collective vs longitudinal limiting and the first USN ships had progressed into...
Forum: Rotorheads
8th Oct 2022, 13:04
Replies: 35
Views: 5,280
Posted By JohnDixson

212: can add swashplate bearing failure to your...

212: can add swashplate bearing failure to your list.

Also, worth noting that some manufacturers include, in their control mixing units, aft cyclic limiting as a function of low collective. Adds a...
Forum: Rotorheads
7th Oct 2022, 01:25
Replies: 18
Views: 2,987
Posted By JohnDixson

You can look up Sikorsky RSRA on line for...

You can look up Sikorsky RSRA on line for something similar.
Forum: Rotorheads
6th Oct 2022, 13:14
Replies: 40
Views: 8,088
Posted By JohnDixson

NWS, a worthwhile point re the external load...

NWS, a worthwhile point re the external load operations impact on CRT’s ( Component Replacement Time ). SA’s eyes were opened after the S-64 started logging ( and the 61 as well ). Drive train cycle...
Forum: Rotorheads
5th Oct 2022, 14:38
Replies: 150
Views: 24,871
Posted By JohnDixson

Thanks, Megan that info is an EEC not a FADEC,...

Thanks, Megan that info is an EEC not a FADEC, and backed up by other posts as well.
Forum: Rotorheads
3rd Oct 2022, 19:58
Replies: 150
Views: 24,871
Posted By JohnDixson

I’m confused. If you go to the Leonardo site and...

I’m confused. If you go to the Leonardo site and look in their 139 brochures, they cite the PT6C-67C engine with FADEC, whereas if one goes to the P&W Canada site and check the same engine, P&W says...
Forum: Rotorheads
3rd Oct 2022, 02:37
Replies: 150
Views: 24,871
Posted By JohnDixson

Megan, I was thinking that if the history...

Megan, I was thinking that if the history recorders were similar to GE;s, collective position, along with a number of other useful parameters would be there. Of course if there were usable FDR and...
Forum: Rotorheads
2nd Oct 2022, 01:41
Replies: 150
Views: 24,871
Posted By JohnDixson

My familiarity with PT6’s ended awhile ago, but...

My familiarity with PT6’s ended awhile ago, but is it a given that their FADECs have built in history recorders?
Forum: Rotorheads
26th Sep 2022, 17:43
Replies: 150
Views: 24,871
Posted By JohnDixson

Concur with comments above. Does it sound like...

Concur with comments above. Does it sound like the crew was facing a multiple basic instrument failure that was beyond the 10 to the minus 9 probability?
Edited: Oh, and combined with similarly...
Forum: Rotorheads
19th Sep 2022, 22:17
Replies: 7
Views: 3,552
Posted By JohnDixson

The cockpit armored seats on the UH-60 have side...

The cockpit armored seats on the UH-60 have side wings on the outboard side of each seat, that can be slid forward, providing ballistic protection for ones torso from side shots, I'd be very...
Forum: Rotorheads
14th Sep 2022, 13:42
Replies: 21
Views: 3,994
Posted By JohnDixson

FDR, thanks…..but we both and all owe thanks to a...

FDR, thanks…..but we both and all owe thanks to a Colonel Bud Patnode and the group he headed up circa 1970 and came up with the handling requirements for the UTTAS. The hinge offset increase and...
Forum: Rotorheads
13th Sep 2022, 12:35
Replies: 21
Views: 3,994
Posted By JohnDixson

LW-Just had a look at the Skadi clip-actually, 4...

LW-Just had a look at the Skadi clip-actually, 4 looks. Hard to say with 100% certainty, but I "think" the tail rotor is slowing down when you get about halfway to the ground. As to why they lost it...
Forum: Rotorheads
12th Sep 2022, 22:37
Replies: 21
Views: 3,994
Posted By JohnDixson

LW, it doesn’t behave like a tail rotor servo...

LW, it doesn’t behave like a tail rotor servo hardcover: they aren’t going very fast at all and that tail rotor has a lot of thrust….what I’m saying is that at the speed in the clip, a servo...
Forum: Rotorheads
12th Sep 2022, 13:51
Replies: 21
Views: 3,994
Posted By JohnDixson

Maybe 212. Hard to say much from that short clip....

Maybe 212. Hard to say much from that short clip. At one point you can see a bunch of aft flapping over the nose and I looked to see the stabilator angle but couldn’t determine with any certitude....
Forum: Rotorheads
12th Sep 2022, 02:17
Replies: 21
Views: 3,994
Posted By JohnDixson

Hello, ZD: The 1976 fly-off competition between...

Hello, ZD:
The 1976 fly-off competition between Boeing and Sikorsky took place in several places.
The operational evaluation started at Ft Rucker Alabama and was completed at Ft Campbell.
The Army...
3rd Sep 2022, 18:23
Replies: 24
Views: 6,918
Posted By JohnDixson

They might call the USMC for a hand. 53K has a...

They might call the USMC for a hand. 53K has a 36k hook.
Forum: Rotorheads
29th Aug 2022, 14:05
Replies: 26
Views: 2,220
Posted By JohnDixson

SAS: email on the way with details.

SAS: email on the way with details.
Forum: Rotorheads
28th Aug 2022, 16:29
Replies: 26
Views: 2,220
Posted By JohnDixson

A long time ago we enjoyed the presence of a very...

A long time ago we enjoyed the presence of a very senior former officer as Chief Pilot. He was big on checklists and had inherited a fine set of binoculars from his predecessor. By gosh he used them...
Forum: Rotorheads
27th Aug 2022, 16:03
Replies: 11
Views: 1,955
Posted By JohnDixson

Thats a good question in general, 212. There was...

Thats a good question in general, 212. There was another renowned S-64 pilot Bob Brown who espoused the left front seat and had modifications made appropriate to using that location. I know, from...
Forum: Rotorheads
27th Aug 2022, 14:03
Replies: 11
Views: 1,955
Posted By JohnDixson

I wish I knew the contact information for Larry...

I wish I knew the contact information for Larry Pravacek, who did the back seat flying to place the CN Tower in place. Larry had joined SA from the 101st in Vietnam, and after 7 or so years with us,...
Forum: Rotorheads
23rd Aug 2022, 12:11
Replies: 88
Views: 12,700
Posted By JohnDixson

Crab, I’ve always been curious as to why...

Crab, I’ve always been curious as to why Eurocopter/Airbus didn’t either provide larger servo piston area or higher pressure pumps to eliminate the jack stall possibilities stemming from high control...
Forum: Rotorheads
18th Aug 2022, 19:29
Replies: 39
Views: 6,851
Posted By JohnDixson

Ummmm, that might be overselling artificial...

Ummmm, that might be overselling artificial stability additives. E,g., one fine day in Japan at the end of a demonstration mission, returning south from Hokkaido. Sunny day with a wind from the west,...
Showing results 1 to 35 of 880
 


 
Forum Jump

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information

Copyright © 2022 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.