Arkas K-H-M

The Arcas K-H-M is the second rocket in the series of Arcas rockets to have the Actaeon kickstage added.

The Arcas rockets use 4 Ceres K1 staged combustion kerolox engines on the first stage.

The K-H variant uses 2 Iris H-1V electric pump-fed engines on its upper stage, and an Actaeon kickstage which runs on an electric pump-fed Caelus E2 methalox engine and can take 9.85 tonnes to GEO.

Despite the K-H having a higher payload capacity than the K-S and the K-K variants, the payload to GEO remains the same due to the fact that a higher payload would require a redesign of the kickstage.

The vehicle's diameter is 3.5m and the vehicle's total height is 41.1m.