I am posting an updated firetsorm, since when describing the skyranger I thought of a better way to drop bombs.
ME-EAP-62 "Firestorm"
ORACLE can tell us where to hit for best effect. Troop positions, tactics used. But sometimes, the targets it proposes combined with the experience of our generals reveal crucial targets behind enemy lines that we can't reach, such as major supply routes. The ground way is barred by the front lines. Our excavators are too slow and easily revealed. Going by plane is impossible so deep in enemy airspace. The logical solution, therefore, is to travel above the enemy airspace.
The firestorm is an extra atmospheric plane combining our experience in rocket fuels, engines and the newly discovered magmatite, which will allow us to finally breach the endless void that Gagarin first opened for us a mere couple of years ago.
It is a quite peculiar craft, unique, for it is meant to travel where no plane has ever been before. Its body is long and sleek, with a bulge in the middle and tapering flattened sides. It has 4 delta wings on its back arranged in a blizzard configuration providing great lift and between the wings are the 2 engines of this craft which are the real wonder.
This new kind of engine is a bimodal electric/GOFAST design. At low altitudes and speeds, it works as an electric fan engine, in which a ducted fan is powered by an internal reservoid of high capacity magmagel (if we can't still figure out how to extract electricity from it without pushing, add a piston in the reservoir). WIth the high efficiency of electric engines and the high power density of magmagel, at low altitudes when the air is thick and the plane is slow it generates a truly staggering amount of thrust. Then, after the sound barrier is broken, the traditional ramjet activates with a special mixture of GOFAST burns to augment the exhaust. This GOFAST mixture has magmagel dispersed in it to increase the stored energy, with the proper chemicals to allow magmatite energy to be released by the combustion. Finally at high enough altitude it switches to full rocket mode, turning off the fan, closing the intakes, making al the changes required for full bypass of the fan blades.
This combination of actions allows it to have the most suitable configuration for all flight regimes up to (we hope) hypersonic.
Now, all this raw power would be worth little on a conventional plane: it would most simply melt. However Mereth is master of cold and we learned how to cool the skin of a vehicle while working on our missile destroyers (I bet everyone forgot about them). The plane uses a STABIL-ICE cooling system to avoid overheating during cruise and re-entry. The cabin, sized for 2, is also, obviously, environmentally sealed and with an oxygen reservoir.
It has a significant cargo bay capable of carrying many tons of payload. To assist in targeting it uses a birdbrain computer.
In a typical mission, it would receive a target by ORACLE or conventional intelligence. Then, the Birdbrain calculates the trajectory and the plane lifts off, reaching a suborbital path peaking outside the atmosphere. While out of the atmosphere the pilot does final adjustments to match the trajectory with the desired target area, then opens the cargo bay and expels the payload. FInally, the engines are lit again to return home safely, while bombs travel on their merry ballistic way toward the enemy convoy/stronghold/command post.
All this should only take half an hour or so between lift off and impact, giving the enemy very little time to react.
As for the kind of payload, ICE bombs of any size are a mainstay, since they inherently have the cooling required to survive re-entry. Other possibilities are mentioned such as thermal shock pellets in which a solid metal ball with just enough stabil ice to barely avoid melting contains an internal reservoid of ICE which shatters on impact, causing thermal shock large enough to make the projectile explode. They are, however, not essential.
The idea behind the concept is dropping a large payload on a significant area behind enemy lines on the shortest notice, to disrupt enemy operations and make the most of any target of opportunity. Plus, it opens the doors of space.