In order to get 16MT you would need an additional stage. What would Falcon Heavy's TLI performance be with just it's standard upper stage? 10MT doesn't seem like a bad guess.
In order to get 16MT you would need an additional stage. ...
IF we assume 53 t to LEO, then 16 t to TLI is a consistent proportional estimate (w/o any additional stage).Actually, a while ago in Wiki there was full set of performance numbers for FH:LEO -- 53 tGEO -- 19 tTLI -- 16 tTMI -- 14 tC3=0 -- 13 t (as I recall it) also, as I understand, TLI and TMI numbers were calculated by wiki contributors.However, later SpaceX changed their estimate of GEO performance for FH to 13 t, leaving LEO unchanged.Wiki changed numbers accordingly.This set is kind of strange, the proportion GEO/LEO is too low, but we do not know their reasons. And the rocket is not built yet, many things can change.Ed Kyle's site gives performance for FH herehttp://www.spacelaunchreport.com/falcon9v1-1.htmlin the table "Vehicle Configurations"
...C3 = 0 is less than TMI of 14 t... am I missing something?
However, later SpaceX changed their estimate of GEO performance for FH to 13 t, leaving LEO unchanged.Wiki changed numbers accordingly.This set is kind of strange, the proportion GEO/LEO is too low, but we do not know their reasons. And the rocket is not built yet, many things can change.
Quote from: smoliarm on 07/14/2013 06:51 pmHowever, later SpaceX changed their estimate of GEO performance for FH to 13 t, leaving LEO unchanged.Wiki changed numbers accordingly.This set is kind of strange, the proportion GEO/LEO is too low, but we do not know their reasons. And the rocket is not built yet, many things can change.The upper stage on Falcon Heavy is not really optimized for GEO or GTO performance.According to SpaceX, FH can send 12mT to GTO. The delta V for LEO to GTO is around 2.5 km/s. Considering that TLI delta V is slightly more than that (Apollo was 3.05-3.25 km/s) 10mt to TLI seems realistic.Of course you're right, this rocket doesn't even exist yet and a lot could change. Honestly, if they just used a larger upper stage they would get much better BLEO performance. But maybe that's not necessary for any of their future plans, 12mT is plenty for commercial GEO launches.
But the v1.1 and FH upper stage *IS* larger... It appears to be almost twice the tank volume of the v1.0 upper stage.
We have a Falcon Heavy speculation thread guys.
The DSAC mission will be a hosted payload onboard a Surrey Satellite Technology (SST-US) Orbital Test Bed (OTB) spacecraft, currently planned for launch into LEO (Low Earth Obit) in early 2016
They could just add another stage. A wide-body centaur placed ought to be able to put twenty or thirty tons into GTO when starting from LEO, and FH could definitely put it there...Quote from: Lars_J on 07/14/2013 08:47 pmBut the v1.1 and FH upper stage *IS* larger... It appears to be almost twice the tank volume of the v1.0 upper stage. They mean relative to the V1.1.
QuoteThe DSAC mission will be a hosted payload onboard a Surrey Satellite Technology (SST-US) Orbital Test Bed (OTB) spacecraft, currently planned for launch into LEO (Low Earth Obit) in early 2016looks like this has slipped to early 2016
Quote from: cartman on 05/28/2014 11:46 amQuoteThe DSAC mission will be a hosted payload onboard a Surrey Satellite Technology (SST-US) Orbital Test Bed (OTB) spacecraft, currently planned for launch into LEO (Low Earth Obit) in early 2016looks like this has slipped to early 2016Not sure it has slipped: SpaceX launch manifest speaking always about "Year indicates vehicle arrival at launch site."Launch Early 2016 could easy mach with an arrival in 2015 (+ STP-2 US Air Force is the last but one in the manifes for 2015).
Quote from: MTom on 05/29/2014 08:22 pmQuote from: cartman on 05/28/2014 11:46 amQuoteThe DSAC mission will be a hosted payload onboard a Surrey Satellite Technology (SST-US) Orbital Test Bed (OTB) spacecraft, currently planned for launch into LEO (Low Earth Obit) in early 2016looks like this has slipped to early 2016Not sure it has slipped: SpaceX launch manifest speaking always about "Year indicates vehicle arrival at launch site."Launch Early 2016 could easy mach with an arrival in 2015 (+ STP-2 US Air Force is the last but one in the manifes for 2015).First half of 2015 per Shotwell. Also, tanks and engines currently being built at Hawthorne.http://forum.nasaspaceflight.com/index.php?topic=34884.msg1209634#msg1209634http://forum.nasaspaceflight.com/index.php?topic=34884.msg1209997#msg1209997
Quote from: AncientU on 06/05/2014 11:44 amQuote from: MTom on 05/29/2014 08:22 pmQuote from: cartman on 05/28/2014 11:46 amQuoteThe DSAC mission will be a hosted payload onboard a Surrey Satellite Technology (SST-US) Orbital Test Bed (OTB) spacecraft, currently planned for launch into LEO (Low Earth Obit) in early 2016looks like this has slipped to early 2016Not sure it has slipped: SpaceX launch manifest speaking always about "Year indicates vehicle arrival at launch site."Launch Early 2016 could easy mach with an arrival in 2015 (+ STP-2 US Air Force is the last but one in the manifes for 2015).First half of 2015 per Shotwell. Also, tanks and engines currently being built at Hawthorne.http://forum.nasaspaceflight.com/index.php?topic=34884.msg1209634#msg1209634http://forum.nasaspaceflight.com/index.php?topic=34884.msg1209997#msg1209997You mean the demo flight, it's ok.The question was if STP-2 for US Air Force slipped also or it isn't. Can be found any information about the original planned launch date? "Early 2016" is the actual date.
Does anyone actually believe that the demo flight is going to be out of KSC? I know that is what they are currently saying, but it doesn't seem likely that that pad will be ready in time if they are sticking with a "first half of 2015" time frame.
Quote from: DaveJes1979 on 06/12/2014 10:39 pmDoes anyone actually believe that the demo flight is going to be out of KSC? I know that is what they are currently saying, but it doesn't seem likely that that pad will be ready in time if they are sticking with a "first half of 2015" time frame.I don't think there's any point doing the demo until they have this while lawsuit business sorted out, anyway.
I don't see why that would be the case. They need to demo FH if they want to attract customers for it.