Scratch Black and Blue Original Design / Scratch Built

Scratch - Black and Blue {Scratch}

Contributed by Paul Morris

Manufacturer: Scratch
(Contributed - by Paul Morris - 07/02/08)

I'm (Matt Gillard) writing this review for my brother (Paul Morris) as he has recently suffer a stroke, and is finding writing difficult.

Parts

Paul is new to rocketry and this was his first scratch rocket.

He wanted it to be big and to be clustered.

The first thing he did was to work out what sort of fit he could get with his tubes etc.

In the end he went for a triple cluster 18mm mounts in the base of a 40mm diameter BT. This tube was coupled to another tube the same size, giving the bottom half of his rocket a length of 576mm.

The top half of the rocket was based on a nose cone acting as a transition, with two 24mm BT on top. The nose cone at the top of the rocket was novel, as it was none rocketry item that was cut down to fit the tubes and then to accept a 13mm nose cone.

The two halves were connected by shock cord in the usual fashion with a parachute attached.

Building

The fins were a concoction of BTs as a tube fin rocket, with three normal fins sticking out.

The rocket was then primed. And then coated in matt black paint.

Decoration was in the form of a blue metallic A4 sticker sheet that came in the parts.

This was cut into stripes and then added along the BT.

Building

Flights

Black and Blue had three flights

First cluster was on 3x B6-4. Which gave a good flight, with a quickish decent.

Second cluster was with the same motors and another good flight was had.

The Third flight was on C6-5s. Unfortunately only one motor lit and the rocket gave a arched flight (over my car!). Ejection was on the ground. There was minor damage, which can be repaired.

On Pad On Pad

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