OHM Jarvis Heavy Launch Vehicle 2.75

[Cosmic Penguin]

Jarvis H "Block II" on the launchpad. Repainted and with the new Neptune-derived boosters. Ariane style!

I guess with the smaller A5 P241 solids the new rocket would have a slight loss with the performance? (~60 tonnes to LEO?)

 

[K_Jameson]

These boosters are scaled-up versions of the A5 ones. the thrust is lower than the Shuttle SRB but the burning time is longer. With a careful configuration, the resulting performances are mostly unchanged (~80.8 tonnes to LEO).

 

[Izack]

It looks very much like Ariane 5 now. Very nice European look. :thumbup:

 

[Pipcard]

Jarvis-C with those boosters would be even more like the Ariane 5.
(dual payload carrying system)

 

[K_Jameson]

True! :lol:

The performances should be roughly equivalent to Jarvis E.
Unfortunately, unlike Ariane 5, the basic Jarvis configuration isn't optimized to work with big boosters: the core stage itself has too much thrust and too little burning time. As consequence, a classic Jarvis with boosters is ever overpowered and oversized, compared to the payload capacity. This is why the Jarvis M, designed from the beginning to work with boosters, has a different core with hydrolox instead kerolox.

 

[Pipcard]

How come the hydrolox first stage is painted over now?

 

[K_Jameson]

better aesthetics :lol:

 

[Pipcard]

better aesthetics :lol:

And yet the SLS request thread wants to leave the first stage unpainted in order to save mass, even though concept renders show it painted like the Saturn V.

 

[K_Jameson]

I know, but this time the aesthetics wins. :lol: Additionally, i want to visually distinguish the J-M from the Quasar series of rockets.

 

[K_Jameson]

By popular request: added some unpainted insulation on the Jarvis M hydrogen tank. Grey foam instead orange. Once again, a little bit of Ariane style:

The overall appearance remains pretty nice.

 

[Pipcard]

By popular request: added some unpainted insulation on the Jarvis M hydrogen tank. Grey foam instead orange. Once again, a little bit of Ariane style:

The overall appearance remains pretty nice.

Never knew that foam insulation could be a color other than orange or light brown.

 

[K_Jameson]

Never knew that foam insulation could be a color other than orange or light brown.

In some preview of the Delta IV rocket, was blue.

Anyway: to my knowledge, the color vary depending on the time spent on the pad. The shuttle ET had a range of color from light orange to dark brown. Ariane vary from grey to light brown.

 

[Pipcard]

In some preview of the Delta IV rocket, was blue.

I know that, but I have never seen blue foam insulation in a real life picture.

 

[K_Jameson]

True.
Anyway... I see no reason that the foam should be ever orange; Ariane often shows greyish insulation; in other fields, the insulations can be orange, blue, white or otherwise.

 

[Pipcard]

I love the new textures.

But I feel that the Jarvis Heavy has more payload capacity than 80.8 mT to LEO, because the third stage had over 400 m/s of dV left after MECO.
(found out with Burn Time Calculator)

 

[K_Jameson]

Jarvis 2.7 is available. Merry Christmas!

---------- Post added at 06:38 PM ---------- Previous post was at 06:13 PM ----------

I feel that the Jarvis Heavy has more payload capacity than 80.8 mT to LEO, because the third stage had over 400 m/s of dV left after MECO.
(found out with Burn Time Calculator)

Correct. The LEO payload capacity of the J-H is slightly underestimated. There must be some error in my calculations I have not found. In a next update I will provide to correct the problem.

 

[garyw]

Jarvis 2.7 is available. Merry Christmas!

Thanks! Looks like the ISA staff are going to have to work Christmas Day testing it. :lol:

 

[Mantis]

Excellent work as always. You guys over at the Forum Orbiter Italia have been doing some amazing work. Your Jarvis and Neptune rockets along with the Antares spacecraft and the Eridanus shuttle are amongst my favorite addons of all time.

 

[Interceptor]

I,also agree with Mantis,really some great stuff.Thanks

 

[K_Jameson]

Another small update of the Jarvis package is coming. The necessity of this update comes from a my error in the config files. The Jarvis config are a little bit complex, allowing the possibility of choice between various fairings and payload adapters simply moving a semicolon ( ; ), as explained in the documentation.
In the current configs, some choices leads to a CTD or other weird consequences.

The new package corrects any problem. In plus, i have refined some of the new textures introduced in the previous version, and are introduced new optional fairings for Jarvis L and Jarvis C.

As bonus, a cutaway of the Jarvis M will be added at the documentation.