MikeJS

#pragma semicolon 1
#include <sourcemod>
#include <sdktools>
#include <dukehacks>
public ResultType:dhOnEntitySpawned(edict) {
    new String:classname[32];
    GetEdictClassname(edict, classname, sizeof(classname));
    if(StrEqual(classname, "tf_projectile_rocket"))
        CreateTimer(0.1, CheckSpeed, edict);
    return;
}
public Action:CheckSpeed(Handle:timer, any:edict) {
    if(IsValidEntity(edict)) {
        decl Float:vecVelocity[3];
        GetEntPropVector(edict, Prop_Data, "m_vecVelocity", vecVelocity);
        new Float:speed = GetVectorLength(vecVelocity);
        PrintToChatAll("\x04%.2f\x01ups", speed);
    }
}