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Search: Posts Made By: Otterotor
Showing results 1 to 35 of 68
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Forum: Rotorheads
23rd Feb 2024, 07:02
Replies: 186
Views: 38,537
Posted By Otterotor

UH-1Y, AH-1Z FBW...correction

CTR, apologies sir.
The inputs to the three main rotor actuators did include electronic mixing, allowing for the elimination of some control levers below the swashplate but the control inputs from...
Forum: Rotorheads
23rd Feb 2024, 05:25
Replies: 186
Views: 38,537
Posted By Otterotor

UH-1Y, AH-1Z FBW

CTR,
Not sure which Yankee and Zulu you are referencing but the ones I worked on and qualified for the U.S. Marine Corp were and are fly-by-wire. We were able to eliminate numerous collective and...
Forum: Military Aviation
15th Feb 2024, 09:53
Replies: 73
Views: 14,525
Posted By Otterotor

Unhappy Bell's 214ST Flight Test.

Spring - Summer 1982: Three flight test 214ST aircraft located South of Bell's flight test facility in Arlington Texas, 18401, 18402, and 18403 were finishing up their morning's flight cards and...
Forum: Rotorheads
27th Jan 2024, 16:49
Replies: 1
Views: 1,306
Posted By Otterotor

Question Marine Corps UH-1Y damaged while being transported..

Marine helicopter sustains damage during ground transport (marinecorpstimes.com...
Forum: Rotorheads
7th Dec 2023, 16:31
Replies: 39
Views: 21,650
Posted By Otterotor

Thumbs up 07 Dec. 2023, 23nd anniversary of 1st flight of AH-1Z Zulu Cobra

Congratulations are in order to the men and women of the United Stated Marine Corps who fly and maintain the H-1 Upgrade Aircraft

AH-1Z's 07 December 2023, 23rd anniversary of first flight, with...
Forum: Rotorheads
5th Dec 2023, 16:55
Replies: 40
Views: 3,646
Posted By Otterotor

Thumbs up 2024 Calendar

Thanks Ned,

Received my calendar yesterday. Looks fantastic with several Bell commercial models being represented!
Merry Christmas to you and your family!
Forum: Rotorheads
28th Oct 2023, 01:46
Replies: 40
Views: 3,646
Posted By Otterotor

Thumbs up Helo Career

Started working with Bell as structural engineer July 1978. 31 years with Bell as Rotor Structural engineer, Flight Test Engineer on the 214ST, back to Rotor Stress working on LHX, M430, and AH-1Z -...
Forum: Rotorheads
30th Sep 2023, 11:30
Replies: 17
Views: 4,155
Posted By Otterotor

Thumbs up H-1's tail rotor swap to the left side.

Helispotter,

The swap of the tail rotor to the left side involved the maximum clearance between the T/R blades and tailboom during maximum flapping. The right-hand side minimised this clearance...
Forum: Military Aviation
1st Sep 2023, 01:27
Replies: 39
Views: 12,101
Posted By Otterotor

Unloading the Huey rotor head via pushover.

Hey Lonewolf,
All those Huey's except the Yankee, Zulu, where we designed the rotor head to acceptably handle -.5 G's by eliminating the teetering rotor head. I know you knew that, just stating for...
Forum: Rotorheads
29th Jun 2023, 17:54
Replies: 39
Views: 21,650
Posted By Otterotor

H-1 Upgrade's milestone

https://verticalmag.com/press-releases/bell-h-1-fleet-surpasses-half-a-million-flight-hours/

Otterotor
Forum: Rotorheads
24th May 2023, 05:29
Replies: 40
Views: 5,459
Posted By Otterotor

Software glitch:

Megan,
As I understand it, all that you wrote is true. You didn't mention that the Push-To-Reset function was incorrectly connected to an incremental increase in the helicopter flight mode...
Forum: Rotorheads
23rd May 2023, 19:01
Replies: 40
Views: 5,459
Posted By Otterotor

FBW civil certification

I believe the 525 Relentless and the 609 tiltrotor are one to two years away from certification (my guestemation). The V-22 provides a significant amount of reliability data for FBW. (The first crash...
Forum: Rotorheads
22nd Feb 2023, 19:11
Replies: 50
Views: 21,540
Posted By Otterotor

Correct

212; You are correct, I wasn't sure if I would get a lot of pushback for using the correct identfier : Centripetal. Ott.
Forum: Rotorheads
22nd Feb 2023, 19:00
Replies: 50
Views: 21,540
Posted By Otterotor

Main Rotor Blade Integrity.

Main rotor blades require C.F. stiffening in flight to remain integral. I once saw an episode of Air Wolf where they (directors, producers, actors) demonstrated through the magic of television the...
Forum: Rotorheads
9th Jan 2023, 16:37
Replies: 51
Views: 4,254
Posted By Otterotor

Thumbs up Calendars arrived Corpus Christi, Tx.

Thanks Ned for the two calendars. I plan on delivering the second one to my friend this evening. Happy New Year to you and your family!
Change subject, I noticed one of your photos was of the AH-1Z...
Forum: Rotorheads
7th Dec 2022, 16:59
Replies: 39
Views: 21,650
Posted By Otterotor

Thumbs up 07 Dec. 2022, 22nd anniversary of 1st flight of AH-1Z Zulu Cobra

Congratulations are in order to the men and women of the United Stated Marine Corps who fly and maintain the H-1 Upgrade Aircraft

AH-1Z's 07 December 2022, 22nd anniversary of first flight, with...
Forum: Rotorheads
6th Dec 2022, 18:43
Replies: 444
Views: 155,030
Posted By Otterotor

Devil Defiant

The main rotor blades are so stiff ... looks as though Rigor Mortis has set in.
Ott.
Forum: Rotorheads
11th Nov 2022, 16:24
Replies: 51
Views: 4,254
Posted By Otterotor

Not in the idustry as of March 4, 2022 (Retired)

Thanks Ned for the offer. The MRO business at the largest repair center in Corpus Christi, Tx. in the world is still going strong. The Bell portion of military repairs has tapered to about zero with...
Forum: Rotorheads
7th Dec 2021, 12:28
Replies: 39
Views: 21,650
Posted By Otterotor

Thumbs up Dec 7, 21st anniversary of first flight of AH-1Z

Congratulations are in order to the men and women of the United States Marine Corps who fly and maintain the H-1 Upgrade Aircraft!



AH-1Z First Flight: 7 December 2000, Reported Accidents: 1,...
Forum: Rotorheads
23rd Nov 2021, 19:40
Replies: 58
Views: 7,877
Posted By Otterotor

Cool 2022 Calendar

Otter recv'd the calendar last week. Many thanks and may you and your family have a great Christmas Holiday Season!!

Ott.
Forum: Rotorheads
26th Oct 2021, 19:28
Replies: 29
Views: 7,207
Posted By Otterotor

Vne or Vh?

The Vne for skid equipped AH-1Z Zulu Cobra is 200 kts but one does not cruise at Vne. Ott.
Forum: Rotorheads
22nd Oct 2021, 16:18
Replies: 30
Views: 7,371
Posted By Otterotor

One type of Huey maybe...But the twin Huey lives on.

Three XH-40 prototypes were built, followed by six YH-40 service test aircraft. The designation of the XH-40 was soon changed to XHU-1.

This helicopter was the prototype of what would be known...
Forum: Rotorheads
18th Oct 2021, 13:40
Replies: 58
Views: 7,877
Posted By Otterotor

Co-Vid year qualifier for Ned's Calendar

Thanks for the offer Ned,
Working at a U.S. government facility maintaining helos. The restriction here is, we are required to wear a mask while on the base. I tried to come into the office as much...
Forum: Rotorheads
29th May 2021, 23:45
Replies: 444
Views: 155,030
Posted By Otterotor

Devil Sikorsky SB > 1

A couple of agility data points I would be interested in hearing the results on would be hover points: 1) F/A pulse or step input and 2) Lateral pulse or step input at maximum control input rate....
Forum: Military Aviation
16th Jan 2021, 01:11
Replies: 12
Views: 2,891
Posted By Otterotor

Devil Viper for ARH

Disagree golder. Viper has proven to be much more reliable, more efficient financially ... both initial cost and life cycle, has better flight envelope and would have been the better choice. AFAICT...
Forum: Rotorheads
16th Dec 2020, 13:13
Replies: 39
Views: 21,650
Posted By Otterotor

Vibes on flexbeam rotor

MeddlMoe, thanks,

A. While the flexbeam design contributes to lower vibration levels, the mass distribution in the blade is the main vibration reducer. Some two bladers can be balanced for smooth...
Forum: Rotorheads
11th Dec 2020, 17:35
Replies: 39
Views: 21,650
Posted By Otterotor

South Korean Attack Helicopter

South Korea to decide between KUH-1 and AH-1Z Zulu.
Forum: Rotorheads
7th Dec 2020, 15:49
Replies: 39
Views: 21,650
Posted By Otterotor

Thumbs up AH-1Z 20 year anniversary of first flight 7 Dec 2000

Congratulations are in order to the men and women of the United States Marine Corps who fly and maintain the H-1 Upgrade Aircraft!

6687 days with zero incidents, 7305 days with one incident...
Forum: Rotorheads
14th Sep 2020, 05:09
Replies: 23
Views: 8,393
Posted By Otterotor

Phoinix, the AH-1Z flew at 223 KTAS (recorded)...

Phoinix, the AH-1Z flew at 223 KTAS (recorded) and thus is qualified to have a 200 KIAS Vne and the reliablity is as good or better than any other gunship with 85% of rotor components having a 10,000...
Forum: Rotorheads
10th Jul 2020, 02:39
Replies: 10
Views: 1,859
Posted By Otterotor

Thumbs up Huey's

16,000 + Huey's with the last UH-1Y being delivered in 2018 is a slightly larger number.
Ott.
Forum: Rotorheads
2nd Jun 2020, 17:21
Replies: 33
Views: 5,272
Posted By Otterotor

Thumbs up 2020 Air Support Calendar

Received my extra calendar yesterday in Southern Texas. Thanks Ned,

Otter
Forum: Rotorheads
6th Dec 2019, 14:00
Replies: 39
Views: 21,650
Posted By Otterotor

Thumbs up AH-1Z First Flight Anniversary

Congratulations are in order to the men and women of the United States Marine Corps who fly and maintain the H-1 Upgrade aircraft.
AH-1Z's 07 December 2019, 19th anniversary of first flight: 6939...
Forum: Rotorheads
11th Nov 2019, 23:52
Replies: 61
Views: 11,431
Posted By Otterotor

Thumbs up Heliops 2020 calendar

Thanks Ned, calendar arrived Saturday in South Texas. Mighty fine photos!

Otter
Forum: Rotorheads
21st Oct 2019, 17:15
Replies: 61
Views: 11,431
Posted By Otterotor

Flight testing 214ST with BH.

I had been assigned the flight testing responsibilities for the third (of three) 214ST prototype aircraft. On one flight in the South Arlington, Texas area, while gathering data on Bell's first...
Forum: Rotorheads
8th Jul 2019, 17:04
Replies: 50
Views: 31,485
Posted By Otterotor

No need to fast-rope when you're sitting on the...

No need to fast-rope when you're sitting on the ground!

I agree with Winnie... two blades on the tail rotor and the main rotor hub configuration give it away as being a Bell 412.

Otter
Showing results 1 to 35 of 68
 
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