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Forum: Rotorheads
3rd May 2019, 03:13
Replies: 411
Views: 130,741
Posted By JohnDixson

The transition to forward flight resulted in the...

The transition to forward flight resulted in the main rotor downwash impacting the low horizontal tail, which is what of course drove the tail down and nose up.
( About a year later, we were to...
Forum: Rotorheads
2nd May 2019, 02:25
Replies: 411
Views: 130,741
Posted By JohnDixson

Sans, it wasn’t low gain on the 59 ( in the sense...

Sans, it wasn’t low gain on the 59 ( in the sense of control sensitivity ), but rather low blade range, i.e., total moment capability longitudinally. The hell of that issue was that they’d been up...
26th Apr 2019, 22:04
Replies: 17
Views: 2,998
Posted By JohnDixson

Does anyone see a conflict between the apparent...

Does anyone see a conflict between the apparent regulatory approach to drone delivery of packages and the restraints imposed on helicopter external load operations in Part 133?
Forum: Rotorheads
13th Apr 2019, 11:58
Replies: 29
Views: 6,838
Posted By JohnDixson

Ah, Megan, the A model ventilation memories: the...

Ah, Megan, the A model ventilation memories: the three prototypes had zero: no vents, no fans, no sliding window-nuttin’. That first spring/summer of 1977 in South Florida was just wonderful. Then...
Forum: Rotorheads
18th Mar 2019, 00:47
Replies: 29
Views: 6,838
Posted By JohnDixson

Dick, Nick Lappos went to Jordan and with his...

Dick, Nick Lappos went to Jordan and with his excellent memory would know the answer.
Forum: Rotorheads
15th Mar 2019, 20:11
Replies: 29
Views: 6,838
Posted By JohnDixson

DS and rrekn, The Sikorsky Archives...

DS and rrekn,

The Sikorsky Archives statement re the reasons we dropped out of the competition ( which we thought we had won unofficially ) are the same ones I heard internally at the time, to wit...
Forum: Rotorheads
13th Mar 2019, 23:17
Replies: 29
Views: 6,838
Posted By JohnDixson

Unfortunately, the picture in the article was not...

Unfortunately, the picture in the article was not taken for the first flight of the 76A, but rather, some months later when we were honored by a visit from His Majesty King Hussein of Jordan....
Forum: Rotorheads
12th Mar 2019, 02:27
Replies: 46
Views: 12,726
Posted By JohnDixson

Anyone know what sort of nav equipment they put...

Anyone know what sort of nav equipment they put in their 60?
Forum: Rotorheads
9th Mar 2019, 17:29
Replies: 46
Views: 12,726
Posted By JohnDixson

Several of the posts noted Wx but without...

Several of the posts noted Wx but without specifics and I haven’t looked it up. If they were really going from Campbell to ATL, the alternate requirements may have preculded IFR. The UH-60 flies fine...
Forum: Rotorheads
9th Mar 2019, 12:16
Replies: 46
Views: 12,726
Posted By JohnDixson

SAS and FH, depending on the route from...

SAS and FH, depending on the route from Enterprise to Tullahoma and the speed/altitude profile, gross weight, fuel quantity may well have been a factor. One can stretch out an S-70 ( more than you...
Forum: Rotorheads
7th Mar 2019, 13:06
Replies: 37
Views: 14,674
Posted By JohnDixson

Indeed, SAS. My predecessor as Chief Pilot...

Indeed, SAS.

My predecessor as Chief Pilot at SA, Frank Tefft, offered this advice upon his retirement:

“The most important attribute of a Chief Pilot is knowing what is safe to fly and what is...
Forum: Rotorheads
24th Feb 2019, 20:17
Replies: 30
Views: 4,249
Posted By JohnDixson

Indeed, IFMU, your dad made the first flight and...

Indeed, IFMU, your dad made the first flight and the initial envelope expansion tests associated with the stabilator. FBW in 1975. That the stabilator programming came together so quickly is a...
Forum: Rotorheads
24th Feb 2019, 12:40
Replies: 30
Views: 4,249
Posted By JohnDixson

Thanks, BH9-had not heard about Australia...

Thanks, BH9-had not heard about Australia actually using the 130 transport kit.

I realized that I didnít finish the raised rotor/performance story. The actual UTTAS forward flight spec data point...
Forum: Rotorheads
24th Feb 2019, 00:46
Replies: 30
Views: 4,249
Posted By JohnDixson

JimEli a further comment re that tab mentioned in...

JimEli a further comment re that tab mentioned in Post #15. After being bothered about a dim memory, I sent a note to a very good friend with what seems like a photographic memory, and this is his...
Forum: Rotorheads
23rd Feb 2019, 21:36
Replies: 30
Views: 4,249
Posted By JohnDixson

IFMU.in post #13, you noted: " The Boeing UTTAS...

IFMU.in post #13, you noted: " The Boeing UTTAS entry was about 400lbs short of the lift spec requirement."

Had not heard it expressed that way. From experience during the fly-off, there were two...
Forum: Rotorheads
23rd Feb 2019, 19:30
Replies: 30
Views: 4,249
Posted By JohnDixson

JimEli, re post #15; I don’t recall the tab you...

JimEli, re post #15; I don’t recall the tab you refer to in front of the throttle quadrant. Can say that it wasn’t part of the blade clearance instrumentation, as that cockpit clearance senso was...
Forum: Rotorheads
23rd Feb 2019, 12:31
Replies: 30
Views: 4,249
Posted By JohnDixson

The decision to raise the main rotor had nothing...

The decision to raise the main rotor had nothing to do with vibrations. It had everything to do wit a 20-25 kt deficiency at the high speed level flight end of things, compared with predicted...
Forum: Rotorheads
21st Feb 2019, 12:48
Replies: 10
Views: 2,464
Posted By JohnDixson

In 1973 SA decided to install and test a...

In 1973 SA decided to install and test a fenestron on the S-67. Part of that preparation included a short evaluation of a Gazelle arranged thru a private owner. What was ironic was that we noticed...
Forum: Rotorheads
9th Feb 2019, 12:23
Replies: 488
Views: 124,303
Posted By JohnDixson

Correct me if I err, SAS, but a pilot gets signed...

Correct me if I err, SAS, but a pilot gets signed off in a CH-47 after he/she can demonstrate credible taxi 360’s with four wheels on the ground, without using the left rear power steering ( just...
Forum: Rotorheads
26th Jan 2019, 17:42
Replies: 13
Views: 4,278
Posted By JohnDixson

Sultan, I’m curious as to the cruise tip speed?

Sultan, I’m curious as to the cruise tip speed?
Forum: Rotorheads
21st Jan 2019, 01:46
Replies: 32
Views: 5,779
Posted By JohnDixson

Hello DS and that was an observant question. The...

Hello DS and that was an observant question. The pic, by the way, was of the first turbine powered Crane prototype. I thought I remembered the reason for that fairing, but just to make sure I...
Forum: Rotorheads
12th Jan 2019, 16:23
Replies: 78
Views: 14,433
Posted By JohnDixson

Anyone look at the angle between the fwd...

Anyone look at the angle between the fwd skid/nose and the forward tip path compared to the angle between the side skid and the side tip path?
Forum: Rotorheads
11th Jan 2019, 17:26
Replies: 12
Views: 5,506
Posted By JohnDixson

Perhaps not related: did the machine have a rotor...

Perhaps not related: did the machine have a rotor brake?
6th Jan 2019, 22:12
Replies: 47
Views: 18,958
Posted By JohnDixson

To expand the frame of reference, and support Dan...

To expand the frame of reference, and support Dan Brown’s position, the US Army Warrant Officer Pilot program requires a high school diploma. Those young men and women fly aircraft like the Apache...
Forum: Rotorheads
3rd Jan 2019, 20:22
Replies: 32
Views: 5,779
Posted By JohnDixson

Not at all. After the end of the UTTAS...

Not at all. After the end of the UTTAS development in 1976, I was lucky to be temporarily assigned to West Palm as Ch Pilot there, and to do the S-76 with Nick Lappos and his team in the newly opened...
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