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Search: Posts Made By: Otterotor
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Forum: Rotorheads
7th Dec 2021, 13:28
Replies: 30
Views: 16,523
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, 20:40
Replies: 58
Views: 4,538
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, 20:28
Replies: 29
Views: 4,872
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, 17:18
Replies: 30
Views: 6,155
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, 14:40
Replies: 58
Views: 4,538
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
30th May 2021, 00:45
Replies: 359
Views: 121,108
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....
16th Jan 2021, 02:11
Replies: 12
Views: 2,721
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, 14:13
Replies: 30
Views: 16,523
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, 18:35
Replies: 30
Views: 16,523
Posted By Otterotor

South Korean Attack Helicopter

South Korea to decide between KUH-1 and AH-1Z Zulu.
Forum: Rotorheads
7th Dec 2020, 16:49
Replies: 30
Views: 16,523
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, 06:09
Replies: 11
Views: 4,462
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, 03:39
Replies: 10
Views: 1,760
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, 18:21
Replies: 33
Views: 4,503
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, 15:00
Replies: 30
Views: 16,523
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
12th Nov 2019, 00:52
Replies: 61
Views: 9,790
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, 18:15
Replies: 61
Views: 9,790
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, 18:04
Replies: 50
Views: 28,384
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
Forum: Rotorheads
31st Mar 2019, 22:09
Replies: 30
Views: 16,523
Posted By Otterotor

2 fatalities in U.S. Marine Corps Zulu crash at Yuma, Az.

https://www.marines.mil/News/Press-Releases/Press-Release-Display/Article/1801186/ah-1z-helicopter-crash-at-marine-corps-weapons-and-tactics-instructor-course/

Thoughts and prayers go out to...
Forum: Rotorheads
7th Dec 2018, 15:28
Replies: 30
Views: 16,523
Posted By Otterotor

Lonewolf, As I understand, the current FMS...

Lonewolf,

As I understand, the current FMS interest is:

Pakistan's 15 Zulus are on hold ... not delivered and not certain they ever will be.
Bahrain ordered 12 Zulus.
Other countries...
Forum: Rotorheads
7th Dec 2018, 14:00
Replies: 30
Views: 16,523
Posted By Otterotor

Smile AH-1Z first flight anniversary

H-1 Upgrade Fatigue Life Summary

Approximately 90% of main rotor components have been assigned 10,000 Hr. fatigue lives. The predominate vibration source for main rotor fatigue life limits is...
Forum: Rotorheads
6th Dec 2018, 17:10
Replies: 1,216
Views: 621,777
Posted By Otterotor

Low Blade Angle

And that is why blade designers strive to get the overall c.g. of the blade forward of quarter chord or the center of lift, such that if one loses pitch link input on one or all of the blades they...
Forum: Rotorheads
8th Dec 2017, 20:37
Replies: 30
Views: 16,523
Posted By Otterotor

Smile AH-1Z first flight anniversary

In my opinion:
Congratulations are in order to the United States Marine Corps helicopter flight crews for seventeen years (6205 + 4 leap year days = 6209 days) of mishap / accident free operation of...
Forum: Rotorheads
26th Nov 2017, 05:58
Replies: 99
Views: 15,174
Posted By Otterotor

Precert 214ST development flight. Attitude /...

Precert 214ST development flight. Attitude / Altitude Retention System flight. Pilot and FTE onboard. We were both watching instrument panel 'eyes inside' when I looked up and saw a red ball from a...
Forum: Rotorheads
7th Sep 2017, 19:53
Replies: 43
Views: 25,023
Posted By Otterotor

Tiger

And in 'not-very-hot' climate locales!:confused: Otter
Forum: Rotorheads
2nd Sep 2017, 02:12
Replies: 124
Views: 87,532
Posted By Otterotor

0 Deg Nacelle

Sultan

Correct, the clearance for the V-22 between blade tip and fuselage is about 10 to 12 inches. If the V-280 has the same clearance the landing gear stub-wing looks like it protrudes from the...
Forum: Rotorheads
1st Sep 2017, 19:55
Replies: 124
Views: 87,532
Posted By Otterotor

0 Deg Nacelle?

It is looking fairly close for clearance between stub wing and blades in airplane mode or zero deg nacelle angle? Just an observation.:confused: Otter
Forum: Rotorheads
28th Apr 2017, 19:17
Replies: 447
Views: 176,824
Posted By Otterotor

Incorrect Referenced 'By' Line

Originally Posted by Lonewolf_50 http://www.pprune.org/images/buttons/viewpost.gif (http://www.pprune.org/rotorheads/524130-s97-raider.html#post9755203) I was...
Forum: Rotorheads
3rd Jan 2017, 16:30
Replies: 103
Views: 12,516
Posted By Otterotor

2017 Calendar

Ned,


Received mine over the holiday. All months present and in order. Thank you very much for the fine calendar Ned! Hope you had a great Christmas and wishing you a Happy New Year! :ok: ...
Forum: Rotorheads
12th Dec 2016, 20:18
Replies: 30
Views: 16,523
Posted By Otterotor

Lonewolf; A single load failure event (or very...

Lonewolf; A single load failure event (or very low cycle count) is described as being a 'static' failure vs. high cycle count and gradual failure as evidenced by fatigue striations as being a...
Forum: Rotorheads
12th Dec 2016, 14:09
Replies: 30
Views: 16,523
Posted By Otterotor

Marines AH-1Z Zulu

Congratulations to the United States Marine Corp helicopter flight crews for sixteen years (5840 days) of mishap / accident free operation of their AH-1Z Viper Helo with original design main and tail...
Forum: Rotorheads
6th Dec 2016, 21:48
Replies: 103
Views: 12,516
Posted By Otterotor

Helo Design for me!

Worked at a small airport in rural New Mexico for spending money during high school. National Guard landed an AH-1S cobra on H.S. football field for career day. I was impressed, wrote to Bell...
16th Nov 2016, 19:57
Replies: 15
Views: 3,238
Posted By Otterotor

Viper

CAC Runaway


More robust?? Z max climb rate greater than Apache, Vne 223 kts is greater than Apache, Roll inertia lower than Apache, thus roll rate response greater than Apache. Bearingless...
2nd Jun 2016, 04:36
Replies: 27
Views: 9,214
Posted By Otterotor

Build New VS. Rebuild

Originally posted by Lonewolf_50:

USN ended up in the same boat regarding the SH-60B/F remanufacture into SH-60R. All said and done, the "refurbish" didn't pan out, so new R's instead of the...
Forum: Rotorheads
10th Dec 2015, 14:35
Replies: 30
Views: 16,523
Posted By Otterotor

H - H H-1 Upgrade contract let in November...

H - H
H-1 Upgrade contract let in November 1996. Clean sheet rotor design initiated. Zulu first flight Dec 2000 with Bell flight crew. Flight testing with Marine pilots initiated 2002. First...
Forum: Rotorheads
10th Dec 2015, 13:44
Replies: 30
Views: 16,523
Posted By Otterotor

U.S. Marine Corps AH-1Z Zulu

Congratulations to the United States Marine Corps helicopter flight crews for fifteen years (5475 days) of mishap / accident free operation of their AH-1Z Viper Helo with original design main rotor....
Showing results 1 to 35 of 50
 


 
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