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Search: Posts Made By: CTR
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Forum: Rotorheads
27th Apr 2024, 16:03
Replies: 271
Views: 54,508
Posted By CTR

Playing Musical Chairs with Engineers

My contacts at Bell told me what happened when LM filed their protest. For three months there was no funding to keep the Bell engineering teams on FLRAA together to continue working. So, with the...
Forum: Rotorheads
20th Apr 2024, 12:13
Replies: 271
Views: 54,508
Posted By CTR

No aircraft systems are ballistic proof, they are...

No aircraft systems are ballistic proof, they are only ballistic tolerant. But based on published photos, the V-280 will incorporates a fully redundant pylon conversion actuator design, like the...
Forum: Rotorheads
18th Feb 2024, 15:26
Replies: 186
Views: 38,966
Posted By CTR

Sultan, Are you familiar with the song from...

Sultan,

Are you familiar with the song from the musical Hamilton, “The Room Where it Happens”?

I was in the proverbial room at Bell when it happened. A small group engineers risked their future...
Forum: Rotorheads
17th Feb 2024, 19:26
Replies: 186
Views: 38,966
Posted By CTR

Thanks for saving me the time and responding

Splinedrive,

Thank you for saving me the time, and responding with most of the points I would’ve been making. Building on one point that really concerns me, is training the next generation of...
Forum: Rotorheads
28th Oct 2023, 13:12
Replies: 186
Views: 38,966
Posted By CTR

More Irony

One additional bit of historical irony in the FARA competition.

Sikorsky fully funded the Raider X prototype (not the FARA) on their own and teammate funding, absent any government request.
...
Forum: Rotorheads
19th Jul 2023, 18:54
Replies: 25
Views: 5,740
Posted By CTR

If you check the full 429 schematic (you cut off...

If you check the full 429 schematic (you cut off the right half), you will see the check valve I referenced that can cause cavitation located at the base of the reservoir can.
Forum: Rotorheads
4th Jun 2023, 19:05
Replies: 40
Views: 5,582
Posted By CTR

I believe Bell is basing their design on the more...

I believe Bell is basing their design on the more successful SO 1221 Djinn cold tip jet propulsion applied to a gyrocopter.


https://en.wikipedia.org/wiki/SNCASO_SO.1221_Djinn
Forum: Rotorheads
4th Jun 2023, 14:00
Replies: 40
Views: 5,582
Posted By CTR

SplineDrive, Perhaps the revival time for a...

SplineDrive,

Perhaps the revival time for a tip jet may have come ;-)

https://cimg2.ibsrv.net/gimg/pprune.org-vbulletin/679x910/img_6502_6cf28830641164c52a78dbdf244cecf854584ddb.jpeg
Bell...
Forum: Rotorheads
23rd May 2023, 10:00
Replies: 271
Views: 54,508
Posted By CTR

Stuart, To each their own. Humor is a very...

Stuart,

To each their own. Humor is a very personal thing. I however, found it hilariously funny in a Steinfeld episode way. It was also almost spot on accurate in the engineering technical...
Forum: Rotorheads
22nd May 2023, 19:29
Replies: 271
Views: 54,508
Posted By CTR

Hitler Reacts to the Bell V-280 winning FLRAA.

This is the first I ever saw this type of parody humor. When playing the video on a phone, you may need to hold the phone vertically to see the full image.

All the audio is in German, but the...
Forum: Rotorheads
19th May 2023, 10:17
Replies: 271
Views: 54,508
Posted By CTR

Wet versus Dry

Another large benefit of a wet clutch over a dry clutch is more predictable coefficient of friction. The highest risk of damage in this clutch application is during engagement with the main rotors...
Forum: Rotorheads
25th Apr 2023, 20:44
Replies: 271
Views: 54,508
Posted By CTR

Configurations

To paraphrase a famous UK Prime Minister:

“The Tiltrotor is a horrible aircraft configuration, except when compared against all other alternatives”
Forum: Rotorheads
23rd Apr 2023, 18:40
Replies: 271
Views: 54,508
Posted By CTR

I heard a different background story. In early...

I heard a different background story. In early 2012, when Boeing and Bell were still teamed on the proposal for what was to evolve into FLRAA, Bell got uneasy, sensing that Boeing was up to...
Forum: Rotorheads
14th Apr 2023, 15:38
Replies: 271
Views: 54,508
Posted By CTR

FMS

I would amend your final statement to add “US” before Army.

My point earlier was, Boeing and Sikorsky will have many years of profit coming in from foreign military sales of Blackhawks, Chinooks,...
Forum: Rotorheads
4th Jan 2023, 23:20
Replies: 271
Views: 54,508
Posted By CTR

Cynical minds can rarely be changed. I believe...

Cynical minds can rarely be changed. I believe you have a healthy skepticism. ;-)
Forum: Rotorheads
19th Dec 2022, 15:36
Replies: 271
Views: 54,508
Posted By CTR

The Time Has Come To End Tiltrotor Generalizations

Imagine if I said that all helicopters can safely auto rotate to the ground, that would be a false statement.

If I stated that all helicopters with two engines could safely climb following the...
Forum: Rotorheads
15th Dec 2022, 20:38
Replies: 271
Views: 54,508
Posted By CTR

Add a second engine on FARA, and you have a...

Add a second engine on FARA, and you have a Boeing Apache replacement, not a Kiowa replacement (admittedly the original FARA spec is far from a Kiowa).

This will not make Boeing happy. With all...
Forum: Rotorheads
13th Dec 2022, 20:59
Replies: 271
Views: 54,508
Posted By CTR

Footprints

With all of the unsupported statements being made regarding the V-280 footprint compared to Blackhawk, I decided to lay it out for myself.

Full disclosure, I couldn’t find anything but photographs...
Forum: Rotorheads
11th Dec 2022, 21:44
Replies: 271
Views: 54,508
Posted By CTR

V-22 Disk Loading 22.2 LB/SQFT V-280 Disk...

V-22 Disk Loading 22.2 LB/SQFT
V-280 Disk Loading 16.0 LB/SQFT
CH-53K Disk Loading 18.0 LB/SQFT

Amikar,

The information is out there at reputable sources if you look.

Please make a...
Forum: Rotorheads
9th Dec 2022, 14:29
Replies: 271
Views: 54,508
Posted By CTR

Measuring Tool

admikar,

The one “operational” Tiltrotor you are referring (V-22) has flown over 700,000 flight hours in combat and severe environments. The smaller 609 commercial Tiltrotor in development has...
Forum: Rotorheads
8th Dec 2022, 19:55
Replies: 271
Views: 54,508
Posted By CTR

SASless, No, this is the correct response....

SASless,

No, this is the correct response. Tiltrotors are not helicopters. Just like a Corvette will not haul a half ton of cargo, or a 8 x 4 sheet of plywood, a truck cannot go 0-60 in 4 sec, or...
Showing results 1 to 21 of 21


 
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