SpaceX's Elon Musk Updates Falcon Launch Prospects... As Only Elon Can | Aero-News Network
Aero-News Network
RSS icon RSS feed
podcast icon MP3 podcast
Subscribe Aero-News e-mail Newsletter Subscribe

Airborne Unlimited -- Recent Daily Episodes

Episode Date

AMA Drone Report

Airborne-Monday

Airborne-Tuesday

Airborne-Wednesday

Airborne-Thursday

Airborne-Friday

Airborne-Unmanned w/AUVSI

Airborne On ANN

AMA 03.23.17

Airborne
03.27.17

Airborne
03.28.17

Airborne
03.22.17

Airborne
03.23.17

Airborne 03.24.17

Airborne-Unmanned 03.28.17

Airborne-YouTube

AMA 03.23.17

Airborne
03.27.17

Airborne
03.28.17

Airborne
03.22.17

Airborne
03.23.17

Airborne 03.24.17

Airborne-Unmanned 03.28.17

Mon, Dec 12, 2005

SpaceX's Elon Musk Updates Falcon Launch Prospects... As Only Elon Can

SpaceX's irrepressible Elon Musk has posted an occasionally tongue-in-cheek update as to the condition and prospects for a launch of their several-times-delayed Falcon 1 launch vehicle. Delayed by a multitude of small problems and the inherent difficulties in launching from a (very) remote location, hopes are high for a launch of the Falcon 1 later next week. Herewith, Elon's complete report...

Launch Date

The new launch date is approximately December 20, depending on when the Missile Defense Agency testing is complete. As soon as we have a firm time, it will be posted on the SpaceX website.

Liquid Oxygen

Regarding liquid oxygen (LOX) supplies, we expect to have enough on hand this time to fill the rocket four or five times over. This should account for almost any issue with a particular storage tank as well as an extended hold on the pad. There is an engineering term known as a s*load. I have asked that we have at least two s*loads on hand in case one s*load is not enough.
 
We chartered a C-17 to fly two of our empty high quality LOX containers to Hawaii, sourced another high quality LOX container on Hawaii and put all three on the barge to Kwajalein. In addition, our LOX plant on Kwajalein has been repaired and is producing LOX on island again. 
 
Some might be wondering why we were so dumb as to run out of LOX on a remote tropical island on the last launch attempt. Believe me, we tried hard to avoid it, but several issues conspired to create the problem:

  • The additional month of Merlin testing resulted in additional LOX boil-off on island. Even though it is stored in vacuum jacketed containers, LOX at -300F degrees does not like being on a tropical island at 85F.
  • The SpaceX LOX plant on island broke down a few weeks prior to launch, which meant we could not top up.
  • We ordered replacement LOX from Hawaii, but the container quality was poor, so only 20% of what we ordered actually arrived.

Ground winds were unusually high on launch day, which amplifies the boil-off rate significantly, since the Falcon's first stage LOX tank is uninsulated.

All of the above would not have mattered if our final storage tank did not have a small, manual vent valve incorrectly in the open position. Somewhat agonizingly, we were only a few percent away from being full. We just needed a little sip from the last tank.

After a while, we were able to close the vent and fill the vehicle's LOX tanks. However, we use LOX to chill our onboard helium and the absence of ground LOX to do so resulted in the helium heating up and venting back to storage. In the end, we did not have enough LOX to stay filled on the rocket and chill & pressurize the helium.

Engine Computer

The engine computer reboot anomaly was definitively traced to a ground power problem. Importantly, this would have had no effect on flight, since we switch to vehicle power before the autosequence begins. The reason it cropped up at Kwajalein was that the higher load on the longer umbilical (three times longer than in prior tests) coupled with high temperatures in Kwajalein resulted in increased resistance in the ground umbilical. This was just enough to lower the voltage below minimums and cause an engine computer reset when drawing maximum power. The same max power test was repeated on internal vehicle batteries with no problem at all. This problem has been solved by slightly increasing voltage on the ground umbilical.

--Elon--

FMI: www.spacex.com

Advertisement

More News

Airborne-Unmanned 03.21.17: Heron 1 FOC, Canadian UAVs BVLOS, Quad Inspects C17

Also: Terra Drone, senseFly partners with MicaSense, Quadcopter Topology Optimization The Heron 1 UAV has attained Full Operational Capability (FOC), allowing two Republic of Singa>[...]

AMA Drone Report 03.23.17: New Canada Drone Regs, 'Anti-Drone' Race, Tiny Whoop

Also: SELFLY Camera-Kickstarter, Turtle Tracking Drones, Drones Save Lives! The Canadian government has recently released new regulations for recreational drone operators that carr>[...]

Airborne 03.27.17: Continental Motors ‘Overhaul’, Amazon Rotor, SpaceX DroneShip

Also: Boom Supersonic, Boeing 747-8, Boeing Grant, IKE's 300,000th, Rocket Lab, Duncan Aviation, Xplorer Mini Continental Motors seems to have a lot of faith in the future of aviat>[...]

Airborne 03.27.17: Continental Motors ‘Overhaul’, Amazon Rotor, SpaceX DroneShip

Also: Boom Supersonic, Boeing 747-8, Boeing Grant, IKE's 300,000th, Rocket Lab, Duncan Aviation, Xplorer Mini Continental Motors seems to have a lot of faith in the future of aviat>[...]

Airborne 03.24.17: GA v Privatization, FAA UAS $$$, Mexico Fines

Also: NASA Authorization, Av-Associations, Essential Air Services, Kite String, Rotax @SnF, Car v Plane, FAA Forecast With the need to authorize the FAA before September 30 of this>[...]

blog comments powered by Disqus



Advertisement

Advertisement

Podcasts

Advertisement

© 2007 - 2017 Web Development & Design by Pauli Systems, LC