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Search: Posts Made By: Tailspin Turtle
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11th Mar 2019, 01:32
Replies: 2,447
Views: 6,135,256
Posted By Tailspin Turtle

A cautionary tale about assuming that the correct...

A cautionary tale about assuming that the correct response to a failure is obvious and straightforward:

Once upon a time, I was involved with the addition of a FADEC (Full Authority Digital Engine...
Forum: Rotorheads
9th Nov 2018, 20:39
Replies: 89
Views: 6,784
Posted By Tailspin Turtle

Once upon a time, I talked to some of the Bell...

Once upon a time, I talked to some of the Bell test pilots and engineers who worked on the HSL program, an early 1950s tandem powered by a P&W R-2800 engine for ASW. When I said HSL, their next...
Forum: Rotorheads
9th Nov 2018, 18:43
Replies: 89
Views: 6,784
Posted By Tailspin Turtle

John - thanks for the referral to 53D cig range....

John - thanks for the referral to 53D cig range. Iím beginning to suspect a tandem pitch-control limitation on cg. Note that I wasnít dinging tandem directional control but its directional stability....
Forum: Rotorheads
9th Nov 2018, 15:16
Replies: 89
Views: 6,784
Posted By Tailspin Turtle

Another difference between tandem and...

Another difference between tandem and single-rotor helicopters is the relative indifference of the former to the wind direction in a hover/departure versus the need to be aware of it when flying the...
Forum: Rotorheads
9th Nov 2018, 14:55
Replies: 89
Views: 6,784
Posted By Tailspin Turtle

Very interesting, John, and counter intuitive....

Very interesting, John, and counter intuitive. All that from the canted tail rotor? Some from the height of the rotor head above the cg? Some peculiarity of the CH-47 control mixing? I've toyed with...
9th Nov 2018, 14:37
Replies: 51
Views: 8,742
Posted By Tailspin Turtle

Lack of Cushioning

I likened it to sitting on a new wooden church pew (MB 5 in an OV-1D Mohawk). The lack of cushioning was a feature in the event of an ejection. If there was any, the seat would accelerate upward when...
23rd Jul 2018, 20:57
Replies: 117
Views: 34,106
Posted By Tailspin Turtle

In later pictures, the aft fuselage has canted to...

In later pictures, the aft fuselage has canted to the right with the right hand stabilizer and elevator tips resting on the ground. That's why the elevators look to be streamlined with the stabilizer...
Forum: Tech Log
18th Jul 2018, 00:03
Replies: 43
Views: 5,395
Posted By Tailspin Turtle

The Vought F7U-3 Cutlass had a bleed-air line...

The Vought F7U-3 Cutlass had a bleed-air line running down the nose landing gear strut that spun two paddle wheels. one on each nose gear wheel, to reduce kickback loads on the nose-landing-gear...
19th Feb 2018, 00:16
Replies: 31
Views: 4,281
Posted By Tailspin Turtle

Once upon a time, a rich guy bought a Bell Model...

Once upon a time, a rich guy bought a Bell Model 47 helicopter and was taught to fly it at the Bell school. He brought it to his instructor a year or so later and complained that it had gotten weak...
9th Oct 2017, 20:12
Replies: 66
Views: 19,016
Posted By Tailspin Turtle

In my opinion, the Red Arrows put on the best...

In my opinion, the Red Arrows put on the best display relative to the Blues, the Thunderbirds, and Snowbirds, although the last was handicapped by having to take off well before their display and...
Forum: Rotorheads
3rd Aug 2017, 03:25
Replies: 404
Views: 120,883
Posted By Tailspin Turtle

"Hard Landing"

My guess is the "landing" was hard enough to result in maximum landing gear stroking as the first step in reducing the initial sink rate to one that the crew could tolerate without injury.
20th Mar 2017, 23:33
Replies: 1,109
Views: 447,614
Posted By Tailspin Turtle

Yes I read it - On page 11 of Appendix H it is...

Yes I read it - On page 11 of Appendix H it is written that "The height loss appeared to be insensitive to whether 1 or 2 notches of flap were selected and to the power setting". Which is why I wrote...
20th Mar 2017, 21:10
Replies: 1,109
Views: 447,614
Posted By Tailspin Turtle

I noticed the apparent hesitation on the backside...

I noticed the apparent hesitation on the backside of the loop as well and surmised earlier that since he appeared to be somewhat south of where he intended to be, he was thinking (analyzing in AAIB...
18th Mar 2017, 23:15
Replies: 1,109
Views: 447,614
Posted By Tailspin Turtle

This illustration doesn't look right. Minor...

This illustration doesn't look right. Minor problem: the run-in should probably be along a line denoted by the radar hits. However, the actual pull-up had to be about as early as shown because...
15th Mar 2017, 17:25
Replies: 1,109
Views: 447,614
Posted By Tailspin Turtle

It took me a couple of viewings of the video when...

It took me a couple of viewings of the video when it was first available to figure out what the maneuver was and moreover, what its purpose was. One shortcoming is that you roll away from the venue...
14th Mar 2017, 22:45
Replies: 1,109
Views: 447,614
Posted By Tailspin Turtle

Back to the beginning of the accident maneuver:...

Back to the beginning of the accident maneuver: there was an additional gate besides the speed (very important) and altitude (in my opinion, not so important because one should fly a loop so as to be...
7th Mar 2017, 13:21
Replies: 1,109
Views: 447,614
Posted By Tailspin Turtle

It looked to me from one of the videos that the...

It looked to me from one of the videos that the roll intended to change the axis of the loop was accomplished before the airplane was vertical. That would have displaced him farther along his run-in...
16th Jan 2017, 22:12
Replies: 65
Views: 10,954
Posted By Tailspin Turtle

At one time Twelve O'clock High was a case study...

At one time Twelve O'clock High was a case study at the Harvard Business School, as was Twelve Angry Men.
25th Dec 2016, 22:00
Replies: 486
Views: 520,286
Posted By Tailspin Turtle

https://www.youtube.com/watch?v=mvgvIxpNMn0

https://www.youtube.com/watch?v=mvgvIxpNMn0
14th Aug 2016, 14:28
Replies: 66
Views: 23,158
Posted By Tailspin Turtle

Jets take more time to spool up from approach...

Jets take more time to spool up from approach thrust to maximum thrust than propeller-driven airplanes, even turboprops (the core of a turboprop engine is turning at full speed). There is therefore...
27th Jul 2016, 03:56
Replies: 49
Views: 15,042
Posted By Tailspin Turtle

Standard functional test of a production USAF F-4...

Standard functional test of a production USAF F-4 upon landing at McAir, St. Louis: touchdown, pop the drag chute, full brakes to check anti-skid function. Occasionally a pilot would forget that he...
Forum: Rotorheads
16th Jul 2016, 03:27
Replies: 488
Views: 122,018
Posted By Tailspin Turtle

Differential lateral cyclic. With a right pedal...

Differential lateral cyclic. With a right pedal input, in effect the forward rotor tilts to the right and the aft rotor tilts to the left.
10th Jul 2016, 02:18
Replies: 243
Views: 58,154
Posted By Tailspin Turtle

Same with the MGB, only the electric fuel pump...

Same with the MGB, only the electric fuel pump was in the far right behind the seats and under the deck above the batteries (yes, two six-volt to provide a 12-volt system), so the driver (left side)...
3rd Jul 2016, 17:16
Replies: 243
Views: 58,154
Posted By Tailspin Turtle

You can if it's an MGB fuel pump. (Also see, "Why...

You can if it's an MGB fuel pump. (Also see, "Why do the Brits drink warm beer?"
23rd Apr 2016, 15:32
Replies: 43
Views: 18,875
Posted By Tailspin Turtle

In McDonnell flight test in 1967, our tired F-4C...

In McDonnell flight test in 1967, our tired F-4C chase plane had no problem keeping up with the first F-4K during acceleration at altitude. We (and Rolls-Royce) were relieved when it finally reached...
Showing results 1 to 25 of 72
 


 
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