S3 Engine Clusters

[Superluminaut]

Post everything and anything related to engine clusters involving size 3 tanks.

A note to somebody... this thread is not about .23.5, it's not about asteroids, and it's not about the new parts. It's about construction techniques.

04/05/14:

So, because this thread got moved anyway, and is now in "Gameplay Questions and Tutorials" (I don't know I didn't move it), I feel I should restate things in the form of a question.

Do you have any ideas and/or info related to engine clusters involving size 3 tanks?

And its open ended, so you can't really completely answer it...

Edited April 5, 2014 by Superluminaut

[Superluminaut]

This is a revision on previous data.

Thrust for thrust, this is how the KR-2L and a LV-T30 cluster compare.

At a thrust to weight ratio of 2, the LV-T30 cluster is better below 6.799km.

At a thrust to weight ratio of 1, the LV-T30 cluster is better below 7.194km

In practice it would be most efficient to use a LV-T30 cluster below 7km, and the KR-2L-30 above.

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Thrust was used to scale LV-T30 mass with that of the KR-2L. Additionally I added the mass of one radial attachment point per LV-T30.

Total LV-T30 mass = ((KR-2L thrust/LV-T30 thrust)*LV-T30 mass)+((KR-2L thrust/LV-T30 thrust)*radial attachment point mass)

Fuel mass and payload mass were split evenly according to TWR.

Full fuel mass & payload = ((2500/TWR)-engine mass)/2

Empty fuel mass = (((2500/TWR)-engine mass)/2)/8.2

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Altitude at which the KR-2L produces an equal Isp to the LV-T30, altitude 8.047km.

KR-2L = Blue

LV-T30 = Red

KS-25x4 & KR-1x2 = Yellow

Mainsail = Green

x = Altitude

y = Isp

Edited April 8, 2014 by Superluminaut
incomplete data

[Superluminaut]

19xLV-T30 cluster

Thrust = 4085

I was also thinking about a 4xmainsail, thrust = 6000

[Comrade Jenkens]

I'm using 4 skippers on the core stage atm.

[Vanamonde]

But post it here in gameplay questions, the proper spot for construction tips. (Moved.)

[Giggleplex777]

Two LFBs clipped together inside a tank:

4000kN

[Superluminaut]

I was able to build a 7xmainsail cluster. 10,500KN.

Edited April 8, 2014 by Superluminaut

[Superluminaut]

Two LFBs clipped together inside a tank:

http://i.imgur.com/wiaNKhf.png

4000kN

Hey, I ran some numbers on this configuration.

With a TWR of 2 the 2xKR-1x2 is better below 7.256km.

With a TWR of 1 the 2xKR-1x2 is better below 2.038km.

Edited April 8, 2014 by Superluminaut

[Superluminaut]

3xKR-2L, 7,500kN

Lots of thrust with a better performance than mainsails.