inherit
Mr. Rump
46
0
Sept 20, 2023 15:29:07 GMT
8,925
Lavochkin
6,754
August 2016
lavochkin
Mass Effect Trilogy, Dragon Age: Origins, Dragon Age 2, Jade Empire, Mass Effect Andromeda
|
Post by Lavochkin on Dec 6, 2022 15:35:18 GMT
Interesting helicopter rotor configuration, the "intermeshing" one, which eliminates the need for a tail rotor and enables a lighter helicopter to carry a considerable payload.
|
|
inherit
11346
0
Sept 21, 2023 18:01:13 GMT
1,139
skekSil
1,004
November 2019
skeksil
Mass Effect Trilogy, Neverwinter Nights, Mass Effect Andromeda, Anthem, Mass Effect Legendary Edition
|
Post by skekSil on Dec 6, 2022 20:49:22 GMT
Interesting helicopter rotor configuration, the "intermeshing" one, which eliminates the need for a tail rotor and enables a lighter helicopter to carry a considerable payload. Neat. I guess compared to a coaxial rotor helicopters (like Ka-52) its rotor is less complex, though still more complex to a traditional helicopters. The disadvantage, I suppose, is that it loses some of its lift capacity because its rotors are not pointing straight up.
|
|
inherit
802
0
Member is Online
Sept 21, 2023 23:18:51 GMT
4,817
B. Hieronymus Da
Unapologetic Western Chauvinist. Barefoot. Great Toenails
3,397
August 2016
bevesthda
Mass Effect Trilogy, Dragon Age: Origins, Dragon Age 2, Dragon Age Inquisition, KOTOR, Baldur's Gate, Neverwinter Nights
|
Post by B. Hieronymus Da on Dec 6, 2022 21:09:23 GMT
Interesting helicopter rotor configuration, the "intermeshing" one, which eliminates the need for a tail rotor and enables a lighter helicopter to carry a considerable payload. Neat. I guess compared to a coaxial rotor helicopters (like Ka-52) its rotor is less complex, though still more complex to a traditional helicopters. The disadvantage, I suppose, is that it loses some of its lift capacity because its rotors are not pointing straight up. Kaman came up with this design and built helicopters based on it a long time ago, don't know quite when, but '50s or '60. It was used for airfield fire-fight helicopters, for some reason. (it probably had very stable and flyable hover, for it's time, but now we have fly-by-wire and computers) Most Kaman production helicopters (Seasprite) had a conventional rotor, for speed reasons. I don't know why they return to intermeshing, but a wild guess is that it's still good at hovering and lifting.
|
|
inherit
Mr. Rump
46
0
Sept 20, 2023 15:29:07 GMT
8,925
Lavochkin
6,754
August 2016
lavochkin
Mass Effect Trilogy, Dragon Age: Origins, Dragon Age 2, Jade Empire, Mass Effect Andromeda
|
Post by Lavochkin on Dec 8, 2022 2:13:22 GMT
The earliest intermeshing helo was the Flettner Fl 282 that first flew in '41.  |
|
inherit
802
0
Member is Online
Sept 21, 2023 23:18:51 GMT
4,817
B. Hieronymus Da
Unapologetic Western Chauvinist. Barefoot. Great Toenails
3,397
August 2016
bevesthda
Mass Effect Trilogy, Dragon Age: Origins, Dragon Age 2, Dragon Age Inquisition, KOTOR, Baldur's Gate, Neverwinter Nights
|
Post by B. Hieronymus Da on Dec 25, 2022 20:57:50 GMT
Use an aircraft for what it's well suited for, and all will be well. ...Even if it should have been hopelessly obsolete.
|
|
inherit
Mr. Rump
46
0
Sept 20, 2023 15:29:07 GMT
8,925
Lavochkin
6,754
August 2016
lavochkin
Mass Effect Trilogy, Dragon Age: Origins, Dragon Age 2, Jade Empire, Mass Effect Andromeda
|
Post by Lavochkin on Feb 5, 2023 18:27:39 GMT
Pretty cool post-WW2 propeller VTOL aircraft
This seems like it'd be very useful for a modern drone of some kind.
|
|
inherit
802
0
Member is Online
Sept 21, 2023 23:18:51 GMT
4,817
B. Hieronymus Da
Unapologetic Western Chauvinist. Barefoot. Great Toenails
3,397
August 2016
bevesthda
Mass Effect Trilogy, Dragon Age: Origins, Dragon Age 2, Dragon Age Inquisition, KOTOR, Baldur's Gate, Neverwinter Nights
|
Post by B. Hieronymus Da on Feb 5, 2023 20:32:56 GMT
Pretty cool post-WW2 propeller VTOL aircraft This seems like it'd be very useful for a modern drone of some kind. These kind of tail landing VTOL aircraft look so much more viable today, after SpaceX Falcon 9. Computers should be able to do it safely and efficiently.
|
|
inherit
802
0
Member is Online
Sept 21, 2023 23:18:51 GMT
4,817
B. Hieronymus Da
Unapologetic Western Chauvinist. Barefoot. Great Toenails
3,397
August 2016
bevesthda
Mass Effect Trilogy, Dragon Age: Origins, Dragon Age 2, Dragon Age Inquisition, KOTOR, Baldur's Gate, Neverwinter Nights
|
Post by B. Hieronymus Da on Feb 27, 2023 23:17:55 GMT
|
|
inherit
802
0
Member is Online
Sept 21, 2023 23:18:51 GMT
4,817
B. Hieronymus Da
Unapologetic Western Chauvinist. Barefoot. Great Toenails
3,397
August 2016
bevesthda
Mass Effect Trilogy, Dragon Age: Origins, Dragon Age 2, Dragon Age Inquisition, KOTOR, Baldur's Gate, Neverwinter Nights
|
Post by B. Hieronymus Da on Mar 12, 2023 1:33:26 GMT
So, Rolls-Royce won the contract to re-engine the B-52s. The Rolls-Royce F130 is very similar to the current P&W TF33, so should fit very well.
It is a much more modern engine and has lower fuel consumption though, is more flyable and probably requires much less maintenance.
Essentially, the engine need to be replaced because the TF33 is becoming so old that there are no longer assets to service it available, spare parts etc.
|
|
inherit
802
0
Member is Online
Sept 21, 2023 23:18:51 GMT
4,817
B. Hieronymus Da
Unapologetic Western Chauvinist. Barefoot. Great Toenails
3,397
August 2016
bevesthda
Mass Effect Trilogy, Dragon Age: Origins, Dragon Age 2, Dragon Age Inquisition, KOTOR, Baldur's Gate, Neverwinter Nights
|
Post by B. Hieronymus Da on May 1, 2023 0:24:25 GMT
SpaceX will, in just minutes, launch the biggest satellite ever Visasat3 (and two smaller), and not only that but to geostationary, circular orbit.
That requires almost all from a Falcon Heavy. All fuel will be burnt for lifting. There will be no landing. All three first stages will be discarded, and landing gear and grid fins have been removed to save weight. I think the rocket needs to reach 16,000 km/h before starting second stage, so it'll be full throttle for a long time.
P.S. Edit. Actually 17,000 km/h, and all the way to 120 km altitude, close enough, I didn't have exact data and winged it. But that was one hell of a first stage.
|
|
inherit
802
0
Member is Online
Sept 21, 2023 23:18:51 GMT
4,817
B. Hieronymus Da
Unapologetic Western Chauvinist. Barefoot. Great Toenails
3,397
August 2016
bevesthda
Mass Effect Trilogy, Dragon Age: Origins, Dragon Age 2, Dragon Age Inquisition, KOTOR, Baldur's Gate, Neverwinter Nights
|
Post by B. Hieronymus Da on May 14, 2023 12:44:44 GMT
SpaceX Raptor3 has hit 35.0 MPa combustion chamber pressure, 2.64 MN of thrust, for a one minute duration burn. ...which is pretty insane.  While there are bigger and more "powerful" engines, the only rocket engine efficiency attribute that is superior to, or in the same league as, the Raptor's, is the thrust to weight ratio of the SpaceX Merlin1D (184:1 !!!). (The Merlin has also done some 2000 starts plus 1720 landings with only one single mishap - which didn't affect anything, since the Falcon9 has 9 engines -, which is a demonstrated reliability that should blow everything else out of the water.) Not to mention that these engines are also re-startable, nicely throttleable 100% - 40%, and reusable. And as a final insult they're also (relatively) quite cheap. The Raptor still has to demonstrate reliable flight operation, but it is astounding how outclassed the rest of the world seem to be.
|
|
