Blue Thunder F motors with a 8-second delay.
These F engines were made by Aerotech to be used in the Estes PRO series rockets that use Estes E9 and E12 24 mm engines, giving a lot more power. Estes "E" engines are not available in Europe so these F engines, which have the same dimensions, are ideal if you have an Estes PRO rocket but of course, you can use them in any model with a 24 mm motor mount of the right length.

Black Max propellant produces a black smoke with almost no flame, it ignites more easily and has an higher thrust than Black Jack.