It has a high impact tolerance of 20m/s, and being very tall makes it extremely buoyant in case of a splashdown. It is also the best engine in the game for first stage recovery.

This makes it an excellent and cost-effective mid-game launcher for larger payloads. The Twin-Boar also has highest thrust to weight ratio of any liquid fuel engine in the game and the second highest thrust to cost ratio, second only to the LV-T30 'Reliant' Liquid Fuel Engine. It's similar to a pair of lower-efficiency Vectors. Once the weight and cost of the fuel + tankage is subtracted out, it weighs almost the same as a Mainsail, but has 33% more thrust while actually being 13% cheaper. The Twin-Boar is an unusually good engine. It also comes at quite a literal cost as well. All that self-contained goodness comes at the cost of not having a mounting point for its underside, and not being quite as efficient as dedicated engines. Instead of relying on single engines or solid rocket boosters, the KR-1x2 employs two modified KR-1 engines, fed by a built-in fuel system, as the source of its immense lifting power. This liquid fuel booster system is a very purposeful piece of engineering. The Twin-Boar is the only part that is simultaneously a liquid fuel tank and engine. However, its I sp is slightly (5-10 s) lower than that of the Mainsail at all altitudes. The thrust is higher than the Rockomax 'Mainsail' Liquid Engine and is thus the most powerful large-sized engine. It contains the same amount of fuel as the Rockomax Jumbo-64 Fuel Tank (2880). It also does not allow any parts to be attached below it.

This booster contains two engines at the bottom which are added radially, so the base of the booster is wider than a usual large tank. In addition, the liquid fuel booster can be run longer by adding additional rocket fuel tanks, which the Twin-Boar will draw from. The minimum thrust level required for this booster to lift its own weight is 17.5%. Like all liquid fuel engines, the Twin-Boar is throttleable, both by the main throttle and a thrust limiter tweakable. the exact opposite side of the planet, nets you only 10% of your money back.The LFB KR-1x2 'Twin-Boar' Liquid Fuel Engine is a liquid fuel engine with a built-in liquid fuel tank. Landing as far away as possible from KSC, i.e.This is sad considering you can recover science from them. Debris that land on the surface of Kerbin without a probe core or command pod [uPDATE: apparently DO return funds depending on distance to KSC as long as they land while in physics range (don't net ANY funds.This is nice for those time I just want to see how much the vessel weighs, or that my ladders are placed correctly. I'm happy to report that you get 100% of your Funds back for parts that are on the Launchpad.

So, I observed that landing near Kerbal Space Center nets me between 90%-98% of the cost of my vessel's parts back when recovering, so I decided to run some tests.

Kerbal space program stage recovery