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Forum: Rotorheads
13th Jun 2019, 02:08
Replies: 67
Views: 24,151
Posted By CTR

Make Textron a impossible to turn down offer for...

Make Textron a impossible to turn down offer for Bell. Before Boeing beats them to it.
Forum: Rotorheads
10th Jun 2019, 13:14
Replies: 67
Views: 24,151
Posted By CTR

Coming Up on Three Months Since First Flight

Almost three months have past since the Defiant’s First Flight. Any flight test updates? Not unusual for a new aircraft to be down for a month following First Flight. But three months?
Forum: Rotorheads
25th May 2019, 17:23
Replies: 105
Views: 55,223
Posted By CTR

Bell posted this video of the V-280 performing...

Bell posted this video of the V-280 performing Level 1 handling quality flight testing. Impressive considering the size of aircraft. Especially in light that the Blackhawk does not achieve full...
Forum: Rotorheads
2nd May 2019, 12:03
Replies: 416
Views: 134,051
Posted By CTR

CLAW Rate Limits for Envelope Protection?

Reading the accident report I was surprised to discover that the blades contacted each other while still in flight from rapid roll reversals. I had expected to read they contacted each other when the...
Forum: Rotorheads
22nd Apr 2019, 02:11
Replies: 67
Views: 24,151
Posted By CTR

From what I have been told, PIO from severe...

From what I have been told, PIO from severe vibration can be a concern. At least with FBW with notch filters this can be addressed. This may allow AVC loss to be only mission critical.
Forum: Rotorheads
20th Apr 2019, 19:12
Replies: 67
Views: 24,151
Posted By CTR

Has enough flight envelope on any X-2 been...

Has enough flight envelope on any X-2 been expanded enough to be remotely sure?
Forum: Rotorheads
20th Apr 2019, 14:49
Replies: 67
Views: 24,151
Posted By CTR

AVC a Flight Critical System on Defiant and Raider?

I have been wondering for a while. Is the AVC system on the Defiant and Raider considered a flight critical system? By that I mean, is it like a flyby wire flight control system where redundancy is...
Forum: Rotorheads
30th Mar 2019, 10:56
Replies: 67
Views: 24,151
Posted By CTR

Dueling Prototypes

No disputes on the contract definition. Just describing how the development of the two aircraft plays out to the public. As is noted in the Breaking Defense article.

“Officially, what’s...
Forum: Rotorheads
29th Mar 2019, 17:59
Replies: 67
Views: 24,151
Posted By CTR

No “Formal” Competition

The only disagreement I have these thoughts is with the word “actual”. A better word might be “formal”.

Today’s article in Breaking Defense explains this better than I could. Comments at the...
Forum: Rotorheads
27th Mar 2019, 22:40
Replies: 67
Views: 24,151
Posted By CTR

I actually knew the Bell mechanics who...

I actually knew the Bell mechanics who accompanied the XV-15 to DC to decommission it. Drain fluids, remove pyrotechnics, etc. The aircraft structures and drivetrains still had life left. It was the...
Forum: Rotorheads
23rd Mar 2019, 19:08
Replies: 67
Views: 24,151
Posted By CTR

Seriously Doubt Post Was From “Bell Flight Guy”

I don’t use LinkedIn since it turned into another Facebook. Which I don’t bother with either.

But it I seriously doubt the post was from a Bell employee. How would you ever validate the...
Forum: Rotorheads
23rd Mar 2019, 16:09
Replies: 67
Views: 24,151
Posted By CTR

Toothless Dragon or Defiant?

It is not just you!
https://cimg2.ibsrv.net/gimg/pprune.org-vbulletin/1334x750/2e5795f6_e3a6_4333_9f2b_88473b3b2a92_1173413d866cd16f0ad151adbea4f625e2393c4a.png
Forum: Rotorheads
23rd Mar 2019, 01:15
Replies: 67
Views: 24,151
Posted By CTR

Experience of a Migrant Aerospace Engineer

Sultan has not had the experience of working for multiple competitors in his career. Having worked for the big three plus multiple suppliers I developed an understanding that we are all kindred...
Forum: Rotorheads
22nd Mar 2019, 14:21
Replies: 67
Views: 24,151
Posted By CTR

Now the Competition can Commence!

Now there can finally be a competition between FVL demonstrators. Sultan exaggerated the Defiant schedule delay. First Flight was per DOD contract supposed to occur in the fall of 2017. So the...
Forum: Rotorheads
9th Feb 2019, 12:07
Replies: 105
Views: 55,223
Posted By CTR

Innovation is always a target of the reigning Technology

All new innovations in technology are placed under intense scrutiny and distorted sensationalist coverage by the media. The Osprey was a prime example. Did accidents occur? Yes, but when compared...
Forum: Rotorheads
31st Jan 2019, 13:57
Replies: 19
Views: 2,325
Posted By CTR

Single Engine Back in Fashion with Army

FYI. The US Army Cap Set 1 RFP for the Kiowa replacement specifies a single ITEP engine.
Forum: Rotorheads
30th Jan 2019, 22:29
Replies: 13
Views: 4,294
Posted By CTR

300 Kts Sans Doors Sansanhedral :-) Perhaps...

300 Kts Sans Doors Sansanhedral :-)

Perhaps the added drag from not having doors is not the negative the aero guys thought? So for production the V-280 can dispense with actuated doors and save...
Forum: Rotorheads
29th Jan 2019, 23:56
Replies: 13
Views: 4,294
Posted By CTR

A 737 flys a lot faster than 280 Kts and does not...

A 737 flys a lot faster than 280 Kts and does not require separate actuated doors over the wheels. You just design it properly to minimize buffeting.
Forum: Rotorheads
28th Jan 2019, 19:46
Replies: 13
Views: 4,294
Posted By CTR

Maybe they should dispense with gear doors like...

Maybe they should dispense with gear doors like on the 737 and other aircraft. Sometimes they are more problems than they are worth.
Forum: Rotorheads
26th Jan 2019, 12:36
Replies: 13
Views: 4,294
Posted By CTR

Long List of Achievements

The list of V-280 achievements go on to include major reductions manufacturing and maintenance costs. Not just promises, but validated by applications of similar technology on Bell commercial...
Forum: Rotorheads
25th Jan 2019, 16:38
Replies: 13
Views: 4,294
Posted By CTR

Relative to Competition

Relative to the achievements chalked off by the FVL competition, this is groundbreaking. Consider how long from first flight to max speed it took for the V-22. Not to mention that after four years...
Forum: Rotorheads
25th Jan 2019, 08:35
Replies: 57
Views: 13,229
Posted By CTR

Bell V-280 Valor Achieves Key Milestone: Forward Flight at 280 Knots

Bell V-280 Valor Achieves Key Milestone: Forward Flight at 280 Knots!
https://www.rotorandwing.com/2019/01/24/bell-v-280-valor-achieves-key-milestone-forward-flight-280-knots/
Forum: Rotorheads
10th Jan 2019, 12:15
Replies: 57
Views: 13,229
Posted By CTR

Rigid Rotor Requirements

Unlike conventional helicopters the Defiant incorporates a rigid rotor (no flapping hinge). This drives tremendous loads into the mast. Just hope is beefy enough for fatigue life.

The big...
Forum: Rotorheads
2nd Jan 2019, 15:54
Replies: 57
Views: 13,229
Posted By CTR

Scale Flying Model of SB>1 Defiant

https://cimg2.ibsrv.net/gimg/pprune.org-vbulletin/750x1334/c1d93015_ba60_4f71_85ba_3645977b51ab_14a9b17ae8c8716b6814c1c184d984841def36e3.png
A scale RC model of the Sikorsk/Boeing Defiant is...
Forum: Rotorheads
28th Dec 2018, 04:33
Replies: 57
Views: 13,229
Posted By CTR

No Pilot Doors?

No doors for the pilots? I don’t see any sign of door handles or hinges. Just a piano hinge for the window to swing out for emergency egress. So normal ingress/egress is between the seats as on a...
Showing results 1 to 25 of 94
 


 
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