swap the RX-78-2 "Plane" to a drivable humvee, aka The AN/TWQ-1 Avenger Air Defense System

you need the Compatibility_Add-Ons-PPDT_P.pak from Compatibility between add-on plane mods for the RX-78-2 plane slot
this mod only uses the RX-78-2 plane slot, you do not need to install the RX-78-2 Gundam Addon mod; or if you installed it, you are suggested to uninstall/delete it before using this mod

you need the Land Anywhere mod to make it possible to drive on ground both in mission and in free fly

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drivable ground vehicle hmmwv, with stinger missiles, aka The Avenger Air Defense System.

gun
stinger-msl
sp.w1 -- a10c-uav       when in trouble, request for army air support
sp.w2 -- stinger-aam
sp.w3 -- stinger-agm

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you are suggested to use cheat for being Indestructible / with infinite health point, otherwise as you know, even a slight bump will blow you up to the sky
you are suggested to use cheat for unlimited ammo

if you want pure driving experience in free fly mod, it should be already ok by default with a top speed on ground at about 100km/h

if you want to challenge some mission, then you are suggested to use the upgrade part "next gen high-pressure components" to make it possible to reach the 300km/h take off speed so that you can re-gain the weapon control

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you know how to install a mod
enjoy~

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thanks:
Doraemon
kosnag
m4rkoz
urvogel