Blast-Off Space Rocket: Pumped Up!

 

There's a lot going on on the card art of this air and water rocket and that's just the bit we can see.

There's a powerful looking space plane bottom right, which looks great, but it's the two firing units further up that intrigue me. What are they? Nacelles? They look like they're contained within a gantry of sorts.

And I wonder what that craft is behind the toy. There's a hint of Thunderbird 2!

Do you like it? Anyone got one? 

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Postscript,

Mystery mostly solved!

Thanks to eagle-eyed Looey and Arto (thanks!) we now know the main image of the structures was by Patrick Woodroffe, as it appeared in his 1976 book, Mythopoeikaon (which I've got! Doh!)

It also graced the covers of Space Wars Worlds and Weapons.

That just leaves to space rocket bottom right to ID now.