* Posts by Hopalong

44 posts • joined 13 May 2012

Boeing big cheese repeats pledge of 737 Max software updates following fatal crashes

Hopalong

litigious value for each death, in the region of 2-3million dollars x 320 = 900million to 1 billion dollars

737Max production rate - 10 per week, ticket price for a max-8 $121M (not that anyone pays list price)

So the cost of litigation < weekly income .....

NASA admin: What if we switched one delayed SLS for two commercial launchers?

Hopalong

Delta IV via FH

Well, the Delta IV production line is being run down, and according to ULA, it takes about 3 years from order to delivery, so unless the USAF or NRO are open to giving up on a couple of their Delta IV heavies (Can't see that happening).......

This leaves only the Falcon Heavy, even then it would take two launches to put the the Orion + service module + boost stage into orbit.

Boeing... Boeing... Gone: Canada, America finally ground 737 Max jets as they await anti-death-crash software patches

Hopalong

Re: "US, Canada finally ground 737 Max jets..."

Amendment to the Amendment: remove "two first class seats" and replace with "two steerage seats next to the rear toilets".

SpaceX Crew Dragon: Launched and docked. Now, about that splashdown...

Hopalong

Re: Ripley and a cuddly earth

He already has his volcano lair choosen - Olympus Mons

Waiter, what's this? SpaceX delivery delayed for a day by moldy food

Hopalong

Re: First stage landing was... damp

Elon even thinks that they will be able to re-fly it, but on SpaceX missions (Dragon 2 abort?)

Nikola Tesla's greatest challenge: He could measure electricity but not stupidity

Hopalong
Joke

Re: country & western singers

If it is a Tesla car, very high on the list would be Tesla share shorters, it may even go out of its way to bag one.

Goodnight Kepler! NASA scientists lay the exoplanet expert to rest as it runs out of fuel

Hopalong

Re: Fuel? Why no solar panels?

Solar panels for power, the reaction wheels for fine pointing (powered by the solar panels), then the hydrazine powered RCS for things like unloading the momentum built up in the reaction wheels etc.

The reaction wheels failed over time so it had to use the RCS to do the pointing, which used more hydrazine.

So after 9 1/2 years, it had used up its 11.7 Kg of hydrazine. The camera was failing as well, so it was time for Kepler to retire with a job well done.

Erm... what did you say again, dear reader?

Hopalong

Ghost in the Machine if memory serves me correctly. Also had a early IBM PS2 PC as an clue.

Cops called after pair enter Canadian home and give it a good clean

Hopalong

Re: Ah, glass milk bottles

I seem to remember they where 1/3 pint bottles (190ml approx).

London flatmate (Julian Assange) sues landlord (government of Ecuador) in human rights spat

Hopalong

Re: There comes a point....

Even better, arrange for a special edition of 'Hunted'. Chuck him out and have a couple of TV crews follow him has he tries to avoid the following -

UK Police

Swedish Police

CIA/FBI/NSA

And the most dangerous - a posse of cat lovers....

Hopalong

They might have an issue getting a 123 Meter spire in there.......

Revealed: The billionaire baron who’ll ride Elon’s thrusting erection to the Moon and back

Hopalong

Re: Could be a Celebrity Big Brother worth watching

What has Cislunar space done to warrant Justin Beiber?

Second-hand connected car data drama could be a GDPR minefield

Hopalong

Re: Almost as good as The Dartford Crossing....

Yes, it is very easy to remove a vehicle from your account.

Also, they will automatically remove a vehicle (after few months) if its car tax group changes to 'Disabled'.

It's time for TLS 1.0 and 1.1 to die (die, die)

Hopalong

Received an e-mail from PayPal yesterday saying that I may have to upgrade my browser or not be able to login to PayPal after the 30th June.

They are dropping support of TLS < 1.2 as of the 30th.

My browser passed the test.

SpaceX flings SES-12 satellite into orbit, but would-be lunar tourists should probably unpack

Hopalong

Re: Would-be lunar tourists should probably unpack

Short answer is yes.

Long Answer is yes, Dragon-2 has a dry mass of 6,400Kg, so adding fuel, etc you are looking at around 10,000Kg, a Falcon 9 can do about 3300Kg to the Moon. It needs a Falcon Heavy, expending the centre core.

BFS (The spaceship part of the BFR) is schedule to start Grasshopper type testing next year. Orbit? 2020-21 I think.

First SpaceX Falcon 9 Block 5 rocket lobs comms sat into orbit

Hopalong

The diameter of the Falcon 9 was dictated by the max size which could be transported on the US roads on a daily basis.

SpaceX setup in Hawthorn as there is a pool of labour skills there which he needed and he picked up some suitable buildings at a very good price (ex. Northrop). They have never been adverse to picking up a bargain, the transporter they use to move the cores about KSC and CCAFB was originally built by NASA to move the Shuttle about, they picked it up for a song and converted it, saved a million or so.

For big pork space, look up SLS.

Fixing a printer ended with a dozen fire engines in the car park

Hopalong
Pint

Re: IBM 4019

Had basically the same thing happen to me one night shift in the early '80s. In this case it was an 3800 (we had the fanfold paper version). There was a paper jam under the hot fuser and the cut off did not work.

It started to smoke so I quickly powered it off and switched off the power to it.

Then rang IBM for a CE.

Me, "we have a problem with our 3800 printer, serial 'what ever the serial number was'

IBM ' OK, any error codes'

Me ' No, just smoking well, I have cut the power to it'

brief pause...

IBM ' OK, CE on the way'

A couple of jobs later I working in a office building which was the headquarters for a Brewery.

We had a spat of false fire alarms, the building had a automatic alarm to the local firestation, so within about 5 minutes a couple of engines would turn up. Now if there are too many false alarms we would be charged, so the facilities manager would nip into the staff shop and grab a few trays of beer and slip them to the firemen.

The next time the alarm went off, 4 engines from two stations turned up.....

The Rocky Planet Picture Show: NASA Mars InSight ready for launch

Hopalong

Re: Why from Vandenberg?

This was originally scheduled to be launched in 2016, but a problem with one of the instruments caused it to miss the 2016 window. At the time it looked like the eastern range (Basically KSC and in the Atlas's case, CCAFS) would have scheduling issues so they moved it to Vandenberg. Now the eastern range is even busier so it was kept at VFB.

The mission was originally sized for a Delta II, but they have been just about retired, last one is launched in September from VFB and the Delta II pad at CCAFS had been decommissioned, so the Atlas V 401 was selected, which is a lot more powerful vehicle, so does not need the assist of being launched to the east to send InSight to Mars. InSight is about 850Kg, the 401 can launch about 2000Kg from VFB to Mars.

NASA demos little nuclear power plant to help find little green men

Hopalong

Re: Weight?

Weight, as in mass?

According to the 2015 paper - a 10KWe unit will mass 1544Kg.

DocuSign forged – crooks crack email system and send nasties

Hopalong

world+dog

Well, as a user of Docusign (the agency I can currently with uses it for contract documents), I have received no warnings and four of these fake emails - which where assigned to the bin.

The embedded link sends you to a Russian website.

Spotted: Bizarre SpaceX rocket-snatching machine that looks like it belongs on Robot Wars

Hopalong

Re: Falcon heavy

With the heavy, the side boosters return to LZ-1 at the cape, only the central stage lands on the barge.

Watch it again: SpaceX's boomerang rocket lands on robo-sea-barge

Hopalong

Re: Landing Barges

Just Read the Instructions is the west coast based barge.

Hopalong

Re: Alien Space Bat at 54:19

Most likely venting unused LOX as a part of the procedure to safe the stage. You do not want the stage to explode due to over-pressure of oxygen as the remaining LOX boils off. Especially in a Geostationary transfer orbit.

SpaceX's Musk: We'll reuse today's Falcon 9 rocket within 2 months

Hopalong

He did say that they had 50MPH winds when asked why the stage came in at an angle, that is a Gale (Force 8 to 9). And it landed only a couple of metres off centre!

A very good days work by SpaceX

Top rocket exec quits after telling the truth about SpaceX price war

Hopalong

Re: Reality versus spin

Is it dumb to try and recover 75% of the LV for re-use? (It has been stated that the 1st stage makes up 75% of the hardware costs of a F9).

A lot of missions do not require the LV's full performance, so use the spare fuel to recover the 1st stage. SpaceX has always said that if the mission requires the LV's full performance, then they do not fit the legs and the 1st stage is expended.

SpaceX Falcon 9 grounded by 'sledgehammer' winds

Hopalong

Re: Why super-cooled fuel?

The Falcon 9 is already at the largest diameter they can ship by road.

They are made in California, test fired in Texas then either shipped back to California (Vandenburg) or the cape.

SpaceX Falcon 9 set for fourth launch attempt

Hopalong

Re: Please launch tonight!!

Delayed until Friday - wind shear @10KM exceeding the limits - better safe than sorry.

Computers abort SpaceX Falcon 9 launch

Hopalong

Re: Quite positive really

It has been said that in the days of the Shuttle, the range safety officers made the point of not mixing with the astronauts in case they had to terminate a shuttle flight and kill the astronauts.

The shuttle had no effective escape system. Only the first test flights did the Shuttle have ejection seats, and that was just for the two pilots.

Hopalong

Re: LOX

The FT uses super chilled LOX, which is denser than normal LOX, they get more performance that way. But the down side is you can not hold for any real length of time as it warms up and becomes less dense long before you get boil off. SpaceX do not even start loading the LOX and the RP-1 (which is also super chilled) until T - 35 minutes so it does not get the chance to warm up before launch.

Like most things rockets, everything has a trade off, in this case, extra performance against hold / recycle times.

If you thought rocket science is hard, try rocket engineering!

Hopalong

Re: Try looking for the correct scapegoat

They were probably monitoring the boat as it approached the edge of the 'no-sail' zone, expecting it to hove-to just out side and wait for the zone to expire, but only called 'range red' when it did not stop and sailed into the zone and did not acknowledge the repeated calls on VHF by the coast guard.

Sick burn, brah: SpaceX test fires rockets for SES bird launch this week

Hopalong

Down play

The mission press release is down playing the chances of an successful landing of the first stage. SpaceX is using the performance reserve normally used to recover the stage to give SES-9 a shorter transfer time to GEO, So the stage will have the minimum amount of fuel and Lox left to try for the barge..

SpaceX makes rocket science look easy: Falcon 9 passes tests

Hopalong

I have seen reports that SES are up for using a pre-used first stage on one of their flights.

They are the customer for the next launch out of the cape, but it will not be that flight.

The next Falcon 9 going up will be the last v1.1 and that will be out of Vandenberg - currently scheduled for the 17th

Elon Musk: Wanna see a multimillion-dollar rocket EXPLODE? WATCH THIS

Hopalong

Re: Quite a few incorrect posts above and bad facts in article

Adding a 'landing engine' will add weight, also where would you put it? The base is taken up by the 9 Merlins. The Merlin can throttle back to 70%, they may have a few more % in the back pocket so to speak as they gain experience. Deeper you throttle the engine, the greater chance it will become unstable. It is easier to twig the control software on when to restart the engine than to mess with the engine to get deeper throttling.

The LEM decent stage engine could throttle back to 10%, but that was a very special engine!

The Great Unwatched: BBC hails glorious digital future for Three

Hopalong

To be honest, a BBC 1 +1 will be of more use to a big section of the population than BBC 3. I am thinking of those with out access to iPlayer. The BBC 3 target audience are much more likely to be on the interweb.

Pub time for NASA bods? Orion spacecraft test launch called off

Hopalong

It's a three stage event (If I remember it correctly)

1) Orion hits the top of the atmosphere @20,000 mph

2) It is slowed down to 300mph approx by atmospheric drag

3) 2 small chutes are deployed to slow it to 150mph and are released

4) 3 drogue chutes are deployed which drag out the main chutes

Hence 8 chutes!

Hopalong

Reminds me of a story I read many years ago -

An F-4 Phantom came across a B-52 somewhere over the States and started to show off doing rolls etc. After a minute or two, he flew along side the B-52 and radioed him saying 'I bet you can't do that'. The B-52 came back with 'Ok, we bet you can't do this!' The B-52 flew on straight and level.

After a couple of minutes the F-4 jock radioed back 'Do what? nothing has happened?'

At which the B-52 replied 'We have just shut down 2 engines'

Hopalong

Re: Why is wind a problem

The ground level wind exceeded a predefined value (20 knots I think) and the launch control computer automatically stopped the countdown.

The last think you want is the wind pushing the stack into the tower with the associated RUD event.

Hopalong

Just hope that they do not have the same 'next day' event as Antares, that is a RUD.

Someone needs to do something with that wind gauge and hit that valve with universal tool #1 (big hammer)

Reuse the Force, Luke: SpaceX's Elon Musk reveals X-WING designs

Hopalong

The cost of the LOX and RP-1 used in the launch is noise compared with the cost of the hardware. I think the figure of $200K was stated, a Falcon 9 launch is in the order of $54M. The 'cost' is the lost of performance involved of keeping some back for the the boost back and landing. This means that the 2nd stage will need to do more work, so some lost of payload.

The Merlin engines will have been designed with reuse in mind with greater margins, specially in the turbopump area.

Diary note: Pluto's close-up is a year from … now!

Hopalong

Re: Question

Bandwidth. At that distance the download rate will be 1Kbits/s using the 70m dishes of the Deep Space Network. (they might be able to do 2Kbits/s with some upgrades to the DNS)

Also, the DNS is needed for a lot of other missions, so there will be a schedule balancing act as well.

SpaceX FINALLY lobs six sats into orbit (don't mention the landing)

Hopalong

LOX + warm sea water + iced up pressure relief valve = Karboom

The first stage would still have some LOX left in the tank which would be boiling off, so when it landed in the water, the pressure relief valve could have iced up. The pressure in the tank would have built up until it ruptured.

It is designed to land on land, not the water. Once SpaceX has shown that they can land it on a target, they will be bringing them back to land on a pad for reuse.

The cute things they say

Hopalong

Floppy Care Information

Many, many moons ago in a place far far away (well 3000 miles give or take)....

When PC's where new and had 5 1/2 floppy diskette drives, a company I worked for was holding programming classes for the local hires, each one was given a 1.2MB floppy disk to store their programmes etc.

Now the admin girl who had ordered the boxes of floppies (they came in boxes of 10), noticed that there was some useful 'how to care for your floppy diskette information' printed on the back of the box, so, she thought it would be a good idea to ensure that each student had a copy of this useful infromation. So she photocopied the back of the box and to ensure that every student had a copy, she then proceeded to staple a copy of the care instructions to the floppy diskettes!

NASA: Our ALIEN HUNTING star-scan 'scope is KNACKERED

Hopalong
Unhappy

Re: Honest Queston

It is not in Earth orbit, it is in solar orbit, so it can not be de-orbited.

What will happen is that once all the remaining fuel has been used to keep alinement, it will be commanded to shutdown its transmitter and go into a safe mode.

Once the fuel is gone, as it is not spin stablised, it will start to tumble and will lose power as its solar arrays will nolonger be pointing at the sun.

SpaceX and Bigelow sign deal for inflatable space stations in orbit

Hopalong
Thumb Up

Re: Flatland?

The 330 is the pressured volume in cubic metres. The internal dimensions are about 6m x 9m, so you where not that far out (the external length including the docking module is 14M)

Biting the hand that feeds IT © 1998–2019