Range is only marginally affected by cruise altitude. 20 Km cruise is perhaps the lower limit (below that drag will reduce range significantly). 20-40 km altitude is the operating range.
As for more range by using different material, I think the missile works optimally with current confign and the performance is already UBER, why bother? for larger range & payload the K4 kicks in. I love K15 with its current 1800 - 2100 km range.
As for more range by using different material, I think the missile works optimally with current confign and the performance is already UBER, why bother? for larger range & payload the K4 kicks in. I love K15 with its current 1800 - 2100 km range.