TVR-1180C Mk1 Stack Tri-Coupler

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TVR-1180C Mk1 Stack Tri-Coupler
Part image
Adapter by
O.M.B. Demolition Enterprises
Radial size Small
Cost (total) 680.00 Funds
Mass (total) 0.15 t
Drag 0.3
Max. Temp. 2000 K
Impact Tolerance 12 m/s
Research Advanced construction.png Advanced Construction
Unlock cost 2 100 Funds
Since version 0.7.3
Part configuration stackTriCoupler
Outgoing connectors 3

The TVR-1180C Mk1 Stack Tri-Coupler is an adapter that allows for a single rocket to branch into 3 separate stacks.


All nodes on the TVR-1180C are designed for attaching parts with a diameter of 1 meter. As with all adapters, liquid fuel will flow through it. Despite the similar name, the TVR-1180C is not a decoupler; it does not jettison anything nor does it add a stage to the rocket. It branches into 3 separate stacks, but they are unsupported and prone to bending or breaking if the weight and thrust are not properly distributed. Rockets incorporating a tri-coupler are also likely to wobble, unless the stacks are opportunely bound together with EAS-4 Strut Connectors. The tricoupler is also subtly asymmetrical, so rockets must have control options to correct for induced pitch, yaw, and/or roll.

Another, unconventional use of this part is as a landing 'foot' - when landing very large craft (such as bases), the stock landing legs aren't big or powerful - using the strut parts as 'legs' and the tricoupler as a 'foot', you can artificially make your own landing leg!


The Stack Tricoupler! If your stack is lacking in awesomeness, this is the tool for you! Just remember that this is not a decoupler, and won't separate stages.

O.M.B. Demolition Enterprises


  • Retextured
  • Mass reduced from 0.8 to 0.3 (part rebalancing)
  • (Undocumented part of fuel flow changes) added NoCrossFeedNodeKey = bottom (keeps fuel from flowing FROM the bottom nodes to prevent stack imbalances and such)
  • Replaced tricoupler textures and UV mapping (UV map by Dippeggs)
  • Fuel can now flow through Strut parts like the tricoupler
  • (Bug fix) VAB placement bug with tricouplers and fuel tanks (and decouplers)
  • Initial Release