Author Topic: SpaceX FH : Falcon Heavy Demo : Feb 6, 2018 : Discussion Thread 2 (Read 598030 times)

padrat · « **Reply #1420 on:** 02/19/2018 11:56 am »

Quote from: StuffOfInterest on 02/19/2018 11:11 am

Notice how straight all of the engine covers are on the booster being displayed? Definitely more attention to detail since they are showing this one off for a few days.

For some reason, seeing that booster on the carrier, and with that nose cone, my first thought is "mobile ICBM".

Hey! Did someone brief you on Elon's plan for global dom......never mind. We have some gentlemen in suits and dark glasses that want to speak with you.....

Barrie · « **Reply #1421 on:** 02/19/2018 01:06 pm »

SpaceMX

wannamoonbase · « **Reply #1422 on:** 02/19/2018 02:19 pm »

Quote from: cscott on 02/19/2018 02:13 am

The FH booster's appearance apparently has to do with the National Space Council reception at KSC on Tuesday.
https://twitter.com/NASAWatch/status/965331995076198401

Makes sense, and it's a great piece. I love the optics, it's dirty because it's been busy working.

cscott · « **Reply #1423 on:** 02/19/2018 02:28 pm »

Quote from: cscott on 02/18/2018 08:25 pm

Pretty audacious to park it blocking the entrance to the shuttle exhibit. The other option would block the space ice cream stand, and clearly KSC can't bear the loss of revenue.

Confirmed:
https://twitter.com/ExploreSpaceKSC/status/964905010592071680

They are closing the entire shuttle exhibit on Tuesday for the national space council (but the space ice cream stand remains open!).

ugordan · « **Reply #1424 on:** 02/21/2018 08:46 am »

Didn't see this posted yet so, a high res image gallery of the side core parked at KSC: https://www.teslarati.com/spacex-used-falcon-heavy-booster-photo-gallery

speedevil · « **Reply #1425 on:** 02/21/2018 10:36 am »

Quote from: ugordan on 02/21/2018 08:46 am

Didn't see this posted yet so, a high res image gallery of the side core parked at KSC: https://www.teslarati.com/spacex-used-falcon-heavy-booster-photo-gallery

If you take the image URLs in the page, such as
https://cdn.teslarati.com/wp-content/uploads/2018/02/Falcon-Heavy-booster-display-Tom-Cross-2-541x304.jpg
and edit them to remove the size at the end, you get much larger ones.
https://cdn.teslarati.com/wp-content/uploads/2018/02/Falcon-Heavy-display-merlins-and-octaweb-Tom-Cross-2.jpg

(a tiny clip of the image)

This is just insanely awesome.
Note the promotional links to publicise the gallery below it.

cscott · « **Reply #1426 on:** 02/21/2018 02:34 pm »

CPP in Indiana seems to make some of the plumbing for SpaceX? (Based on that super hi res photo.)

FutureSpaceTourist · « **Reply #1427 on:** 02/21/2018 02:55 pm »

Quote

Now, THIS is a remote camera! Can someone help me identify who's up there? And where can we see that footage? I saw it after reviewing again my FH photos @bencredible @thenasaman @ChrisG_NSF @TheFavoritist @_TomCross_ @Craig_VG @Erdayastronaut @nova_road @elonmusk // #spacex

https://twitter.com/manumazzanti/status/966335286652350464

mn · « **Reply #1428 on:** 02/21/2018 05:26 pm »

Quote from: FutureSpaceTourist on 02/21/2018 02:55 pm

Quote
Now, THIS is a remote camera! Can someone help me identify who's up there? And where can we see that footage? I saw it after reviewing again my FH photos @bencredible @thenasaman @ChrisG_NSF @TheFavoritist @_TomCross_ @Craig_VG @Erdayastronaut @nova_road @elonmusk // #spacex

https://twitter.com/manumazzanti/status/966335286652350464

I'm going to guess it's SpaceX, and we'll see the footage when and if they choose to show it.

cscott · « **Reply #1429 on:** 02/23/2018 06:14 pm »

Quote from: FutureSpaceTourist on 02/23/2018 05:42 pm

Not sure where to post this:

Quote
SpaceX Titanium Grid Fin #RocketScience #Falcon9 #FalconHeavy #SpaceX #design #Manufacturing #innovation @SpaceX

https://twitter.com/_tomcross_/status/967009447053856768

Cool, you can see that the saw toothing is present on each individual grid cell, not just the outer edge.

Serial number 0003, but that's not surprising.

No signs of welding in the individual cells. Machined out of a solid block, by the looks of it.

ugordan · « **Reply #1430 on:** 02/23/2018 06:16 pm »

Quote from: cscott on 02/23/2018 06:14 pm

Cool, you can see that the saw toothing is present on each individual grid cell, not just the outer edge.

Having it only on the outer edge would make no sense.

cscott · « **Reply #1431 on:** 02/23/2018 06:17 pm »

Quote from: ugordan on 02/23/2018 06:16 pm

Quote from: cscott on 02/23/2018 06:14 pm
Cool, you can see that the saw toothing is present on each individual grid cell, not just the outer edge.

Having it only on the outer edge would make no sense.

Sure, but I've never before seen a clear picture of the underside.

matthewkantar · « **Reply #1432 on:** 02/23/2018 06:23 pm »

I think if it was machined, it would have machine marks on it. Musk has said "forged," Maybe someday we will find out for sure. From appearance, I would guess it was cast. Picture shows a cast titanium hammer.

cscott · « **Reply #1433 on:** 02/23/2018 08:57 pm »

Here's an even better picture of the bottom of the fin:
https://twitter.com/abbygarrettX/status/966558476779622400

I agree with "mostly cast" btw. Most castings have a bit of final machining done to clean them up where tolerances are important. I'd expect that would only be true for the mounting surfaces, which are hidden from view.

su27k · « **Reply #1434 on:** 02/24/2018 02:58 am »

Talking about gridfins, take a look at https://www.teslarati.com/spacex-used-falcon-heavy-booster-photo-gallery/#jp-carousel-69316, then compare the "S/N#003" scribble to the one on the right side fin here: https://forum.nasaspaceflight.com/index.php?topic=43149.msg1695084#msg1695084

Same gridfin? Same magic marker scribble (that survived two re-entries)?

speedevil · « **Reply #1435 on:** 02/24/2018 04:09 am »

Quote from: su27k on 02/24/2018 02:58 am

Talking about gridfins, take a look at https://www.teslarati.com/spacex-used-falcon-heavy-booster-photo-gallery/#jp-carousel-69316, then compare the "S/N#003" scribble to the one on the right side fin here: https://forum.nasaspaceflight.com/index.php?topic=43149.msg1695084#msg1695084

Same gridfin? Same magic marker scribble (that survived two re-entries)?

It turns out that the new heatshield of BFS is actually just red sharpie.

acsawdey · « **Reply #1436 on:** 02/24/2018 01:06 pm »

Quote from: speedevil on 02/24/2018 04:09 am

Quote from: su27k on 02/24/2018 02:58 am
Talking about gridfins, take a look at https://www.teslarati.com/spacex-used-falcon-heavy-booster-photo-gallery/#jp-carousel-69316, then compare the "S/N#003" scribble to the one on the right side fin here: https://forum.nasaspaceflight.com/index.php?topic=43149.msg1695084#msg1695084

Same gridfin? Same magic marker scribble (that survived two re-entries)?

It turns out that the new heatshield of BFS is actually just red sharpie.

Just don't write on the grid fin with a Pentel pen:

https://books.google.com/books?id=AJnkCwAAQBAJ&pg=PT25&lpg=PT25&dq=pentel+p
en+chlorine+titanium&source=bl&ots=Fcj-a03R2Z&sig=plEJQxAFy4vzuNUqEfr390OXVPE&hl=en&sa=X&
ved=0ahUKEwjJpuiQ3L7ZAhUD74MKHSe4C7oQ6AEINzAF#v=o
nepage&q=pentel%20pen%20chlorine%20titanium&f=false

Kabloona · « **Reply #1437 on:** 02/24/2018 01:13 pm »

Sharpie makes a TEC marker (trace element certified) for exactly that reason.

http://www.sharpie.com/markers/pro/tec/SHTEC.html

Quote

Sharpie® T.E.C. (trace element certified) Permanent Markers contain less than 200pm of chlorides and other halogens that can cause stress corrosion on metals such as stainless steel and titanium. Use with confidence on aircraft materials, stainless steel, and nuclear grade materials.

And, not suprisingly, this S/N 003 grid fin marking was noticed during its initial flight on the Iridium launch in June 2017, with virtually the same commentary (ie hoping SpaceX didn't use chlorinated ink).

https://forum.nasaspaceflight.com/index.php?topic=42097.msg1697122#msg1697122

JamesH65 · « **Reply #1438 on:** 02/24/2018 02:20 pm »

Quote from: cscott on 02/23/2018 08:57 pm

Here's an even better picture of the bottom of the fin:
https://twitter.com/abbygarrettX/status/966558476779622400

I agree with "mostly cast" btw. Most castings have a bit of final machining done to clean them up where tolerances are important. I'd expect that would only be true for the mounting surfaces, which are hidden from view.

Whether its forged, cast or machined, that looks like a VERY expensive bit of work. Multi $100k I would think. Wouldn't be surprised if they cost more than one of the engines.

OneSpeed · « **Reply #1439 on:** 03/03/2018 11:05 am »

Quote from: catdlr on 03/03/2018 02:35 am

This is a question I get asked a lot in my launch videos, and Flight Club's excellent web-based simulator helps illustrate the answer.

Orbital launches do appear to pitch down towards the horizon, but are you sure the simulation is accurate? The boosters appear to be landing about 70 kms downrange, and I would have expected something closer to parabolic trajectories for the ballistic phases.