Author Topic: ARCA (Read 152455 times)

CameronD · « **Reply #340 on:** 07/28/2022 11:03 pm »

Quote from: Lars-J on 07/28/2022 10:38 pm

One extra thing that adds to the non-believable-ness of this whole idea that few (if any) have commented on is the incredible amount of passive structures this ... thing ... would require to be able to fly.
.......

We've seen most successful NewSpace companies transition over many years from PaperSpace to RealSpace and stay there, but having been there these guys appear to be transitioning back to the drawing board and taking their new-found scamSpace investors with them.

You have to admit that the PaperSpace realm (where physics need not apply) is far easier and less stressful to work in than the places ARCA have been in recent years. Just follow the money!!

xyv · « **Reply #341 on:** 07/29/2022 12:31 am »

Quote from: Lars-J on 07/28/2022 10:38 pm

One extra thing that adds to the non-believable-ness of this whole idea that few (if any) have commented on is the incredible amount of passive structures this ... thing ... would require to be able to fly.

Wernher von Kerman recommends "...struts...you need way more struts..." Bundle of asparagus indeed.

trimeta · « **Reply #342 on:** 07/29/2022 04:02 am »

They haven't gone full asparagus staging yet, they haven't incorporated propellant cross-feed into their plans.

Although if they're using KSP (and not even the newest versions, the old ones with terrible aerodynamics modeling) to design their rockets, it's just a matter of time before they stumble across that concept.

Skyway · « **Reply #343 on:** 08/02/2022 10:02 am »

Oh man... they need to join Pythom Space. It would be the first space comedy joint venture.

Steven Pietrobon · « **Reply #344 on:** 08/06/2022 07:58 am »

Latest test.

"The asteroid mining capsule’s main engine first test at lowest throttle level."

MattMason · « **Reply #345 on:** 08/06/2022 02:42 pm »

Quote from: xyv on 07/29/2022 12:31 am

Quote from: Lars-J on 07/28/2022 10:38 pm
One extra thing that adds to the non-believable-ness of this whole idea that few (if any) have commented on is the incredible amount of passive structures this ... thing ... would require to be able to fly.

Wernher von Kerman recommends "...struts...you need way more struts..." Bundle of asparagus indeed.

Most Kerbal Space Program players are looking at ARCA's ideas, saying to themselves...

"OK...we always claim we need 'MOAR boosters', but this...THIS is just ridiculous."

catdlr · « **Reply #346 on:** 08/13/2022 10:54 am »

https://youtube.com/shorts/ubX_EzTCWkg?feature=share

Steven Pietrobon · « **Reply #347 on:** 08/14/2022 04:01 am »

Objectives before end of year.

1. Drop test of AMi capsule from helicopter or balloon to determine aerodynamic parameters and stability at low sub-sonic speed.
2. Related to Ecorocket launch.
3. Start of sea trials of Ecorocket Heavy.

catdlr · « **Reply #348 on:** 09/10/2022 04:26 am »

Quote from: launchwatcher on 07/24/2022 05:36 pm

Quote from: xyv on 07/21/2022 01:16 am
My first reaction was - that wouldn't even work in Kerbal.
Here's evidence the shape worked in older versions (when aerodynamics was less of a factor). An extreme example is depicted here:

but note that unlike ARCA it's using engines with significantly higher I_sp.

I've seen this approach called "asparagus staging". Besides a limited aerodynamic model, KSP also doesn't model the power requirements or propellant inertia effects of crossfeed, and its propellant crossfeed widget has an unlimited flow rate.

I found another version posted almost 8 years old.

KSP Mars Ultra Direct: Ludicrous single launch to Mars in Real Solar System

libra · « **Reply #349 on:** 09/10/2022 05:06 am »

Ad ARCA per absurdum !

Steven Pietrobon · « **Reply #350 on:** 09/10/2022 05:38 am »

New video from ARCA. They are expanding their test site to assemble Ecorocket Heavy.

electricdawn · « **Reply #351 on:** 09/10/2022 08:21 am »

A year ago or so I thought, well, at least they're trying. And it looked realistic at least.

This... thing? OMFG...

Who actually believes anything this guy says?

catdlr · « **Reply #352 on:** 11/06/2022 06:48 am »

EcoRocket: Episode 18 - We Are Relocating The Launch Activities

Quote

ARCA is currently relocating the launch activities outside of Romanian airspace. We hope to have news on this before the end of this year.

catdlr · « **Reply #353 on:** 11/07/2022 11:58 am »

AMi Exploration - EcoRocket Heavy's Engine Details

Quote

A single EcoRocket Heavy’s first-stage engine is going to deliver 30 tons of thrust. The whole rocket’s weight at the start is 5680 tons

Steven Pietrobon · « **Reply #354 on:** 11/09/2022 06:05 am »

Mockup of 30 t (294 kN) thrust Ecorocket Heavy booster shown in above video.

Steven Pietrobon · « **Reply #355 on:** 11/21/2022 10:16 pm »

EcoRocket Heavy's Engine Details

A single EcoRocket Heavy’s first stage engine is going to deliver 30 tons of thrust. The whole rocket’s weight at start is 5680 tons.

Says we'll see the first seven units before the end of the year.

catdlr · « **Reply #356 on:** 03/11/2023 10:20 am »

So it's been awhile and no major video was published. A set of shorts have been published documenting the initial launch of a test vehicle:

https://youtube.com/shorts/Ckf1xM4CNIg?feature=share

https://youtube.com/shorts/o9hEJrDHuLQ?feature=share

https://youtube.com/shorts/OsPYx1cq9ew?feature=share

https://youtube.com/shorts/SAAC1U41Ng0?feature=share

daedalus1 · « **Reply #357 on:** 03/12/2023 04:10 pm »

Best water powered toy rocket ever!

catdlr · « **Reply #358 on:** 03/25/2023 09:19 pm »

Here is a video of this single test launch from all the various angles (except for the one that shows upwards) published during the past few weeks.

EcoRocket: Episode 19 - Underwater Rocket Engine Test

GWH · « **Reply #359 on:** 03/25/2023 09:57 pm »

Lost track of how many different camera views there were... and not a single one to show that this achieved any kind of height.