OHM Jarvis Heavy Launch Vehicle 2.75

[Cosmic Penguin]

You guys should bid on the Senate Launcher System contract...

I like this new M Block II!

Hmm... SSME-powered first stage with four engines, 8.4 m diameter tanks, new large cryogenic upper stage, large kerolox boosters, capacity of more than 120 metric tonnes to LEO or > 45 tonnes through TLI....looks familiar.... now where did I seen it?

 

[Cras]

Now you know why I like it.

 

[fausto]

Now the road is set for Antares 2.5 release (maybe the next week or tuesday, march 13th because i'm not superstitious at all :lol

 

[K_Jameson]

warning: due to a my error in the calculation of the new Jarvis-M core stage's performances, an update of the package is needed. The update involves the config and guidance file of the Jarvis-M "Block II", along with the mesh of the new cryogenic core stage, because with the revised performances, a fifth SSME engine is needed.

The updated package will be uploaded ASAP. Sorry for the inconvenience.

 

[Pioneer]

This addon is awesome! :10sign: BTW is it safe to overwrite the one I already have with the improved one? :hesaid:

 

[K_Jameson]

If you have set a custom payload on Jarvis M-Block II, it will be necessary set back the related ini and guidance file. Otherwise, the overwrite will be completely safe.

 

[K_Jameson]

The fixed package is now available!

 

[garyw]

The fixed package is now available!

Speedy work. Thank you for the fix and updates. Jarvis is still one of my favourite launch vehicles. :tiphat:

 

[Cosmic Penguin]

Speedy work. Thank you for the fix and updates. Jarvis is still one of my favourite launch vehicles. :tiphat:

Indeed! The payload of the Jarvis series (especially the B, L and E versions) are at the "BLEO exploration sweet spot" of 25-60 mT to LEO / 10 - 30 mT LTO, where payloads in this class are cheaper to develop, yet offers rather large capacities to support lunar / asteroid exploration and deep space construction. They would have made those opposing Ares/SLS proud. :rofl:

BTW the "problem" that forced a re-design of the Jarvis M-II is related to the misuse of specifications of the SSME: the developers incorrectly assumed the SSMEs were running at vacuum during the whole 6 minutes of operations (the specific impulse and thrust should be lower at sea level).

 

[K_Jameson]

Another idea for future versions (the others FOI members will think that i'm going crazy!): Jarvis L-C ("C" stands for "commercial").
With 27 tons to LEO, the standard Jarvis L is perfectly sized for the commercial market, but it lacks an upper stage for GTO and GEO operations. This concept adds a small cryogenic third stage powered by a single RL-10 engine. An interstage adapter and a smaller fairing (derived from Jarvis S) complete the stack.

Launch it from Kourou or from the FOI Aurora base (that is near equatorial) and you have a capability of 12 tons to GTO or 7 tons to GEO, competitive in the commercial arena with Ariane 5 ECA or Delta IV Heavy.

 

[Pipcard]

What's the heaviest geostationary communications satellite?

 

[Cras]

Jarvis L-C you say? I like this concept. Could be very useful.

 

[K_Jameson]

What's the heaviest geostationary communications satellite?

A typical comsat has a weight of 3000/5000 kg.

 

[Pipcard]

A typical comsat has a weight of 3000/5000 kg.

Yes but what's the heaviest? Or does this have a fairing for dual payloads? (e.g. 2 x 5000 kg)

 

[K_Jameson]

Yes but what's the heaviest? Or does this have a fairing for dual payloads? (e.g. 2 x 5000 kg)

the fairing is large enough for dual payloads. Like Ariane 5.

 

[MaverickSawyer]

This concept adds a small cryogenic third stage powered by a single RL-10 engine.

Why use old tech? Swap it for an Aerojet NGE engine, which has plenty of potential growth, and you'll be in better shape. It's both lighter and more powerful: about 400lbs dry and about 30000lbf thrust, IIRC.

 

[Urwumpe]

Yes but what's the heaviest? Or does this have a fairing for dual payloads? (e.g. 2 x 5000 kg)

Heaviest to GTO was currently the Intelsat New Dawn,as I see it, 6300 kg.

 

[fausto]

Good one Andrew! :thumbup:

 

[K_Jameson]

Why use old tech? Swap it for an Aerojet NGE engine, which has plenty of potential growth, and you'll be in better shape. It's both lighter and more powerful: about 400lbs dry and about 30000lbf thrust, IIRC.

You are right. NGE, or the european "Vinci" (that FOI already use in various rocket stages) are more modern projects than the RL-10.

My choice for the RL-10 is for commonality with the second stage (that has four of them). This must be a cheap rocket. And even the RL-10-B-2 has high performances (ISP of 462 sec!)

Thanks for your positive comments on the concept.

 

[garyw]

I don't know about anyone else but I like to have the different options I can build my own rocket suitable for the mission. Its fun planning these things and playing with the options.

Keep up the awesome work.