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SHARKIT Instructions

Updated: 7 days ago

Model Rocketry is a fun and safe family activity.

model rocketry is a science your results may vary depending on how you build the rocket. please read the National Association of Rocketry model rocketry safety code and the model rocket handbook.

My Instructions are meant as a guide and are not a guarantee of stability or function of the product.

This rocket has been tested and proven but your results may be different.

Launching rockets can be dangerous and requires adult supervision. you use our products at your own risk. OLLIE-OOP Model Rocketry is not responsible for any damages or injuries incurred from use or misuse of our products. you are responsible for the Contruction and stability of your rocket. please follow all safety codes and launch procedures as stated by the NAR handbook.

our kits are not intended to be modified. Please use the recommended engines.

Always follow the NAR safety code at








FIN SET and a set of mystery fins, keep them with your other mystery parts.




Read all instructions before you begin.

BT-5 - BT-80 Fin Guide
Download PDF • 30KB

Sharkit Instructions pdf
Download PDF • 3.33MB

1: Start by lightly sanding the body tube just enough to remove the glossy shine from the tube.

(I use 400-800 grit)

Stand the tube on end over the fin marking guide and make pencil marks on the tube at each of the lines on the guide. (I always mark the lug line with a tiny L to keep it separate.)

When finished you should have 6 fin lines, a hook and launch lug line.8 lines total.

(See picture)

Now extend those marks using a door frame or T tool.

Extend the Fwd fin lines and the top Aft line to 9"

Extend the 3 other Aft fin lines to 4 1/2" and the launch lug line all the way down the tube.

2: Locate the motor tube, rings and motor hook.

Using a hobby knife make a 1/8" slit at 1/4" from the end of the tube.

On the opposite end of the tube make a mark at 1/2"

With a file make a small notch in the inside rig of both motor rings just big enough for the hook, about 1/16"

Test fit the rings on the tube with motor hook in the 1/8" slit, if the parts don't fit together easily, lightly sand the inside of the ring until everything fits.

Slide the rings away from the marks and place a ring of glue around the tube just before the marks, so that when you slide the ring up to the marks the rings go through the glue.

Put a bead of glue inside the front of the tube and insert the small motor block ring until it stops on the motor hook. Set the motor assembly aside and let dry fully.

When finished it should look like the one in the picture.

3: Locate the fins and lightly sand each side, round over the leading edges and taper the trailing edges on all fins.

If you plan to fill the fins, do that now.

(I use wood filler mixed with a little water or sanding sealer)

4: Locate the motor mount assembly and test fit it in the tube, lightly sand the rings if necessary.

It needs to slide in easy.

Using a stick place a thick ring of glue around the inside of the body tube about 2" in.

Note the motor hook line and slide the assembly in the tube with one motion, don't stop until the motor mount tube is flush with the end of the body tube.

After its dry place a ring of glue around the aft ring. (A stick or long glue applicator works best)

5: From the motor end of the tube make marks on all 4 aft fin lines at 1/4" up

Make marks on all 3 forward fin lines at 6 7/8" from the motor end of the body tube.

6: Locate the fins and place a line of glue on the root edge of one large fin and place the end of the root edge on one of the 1/4" marks, make sure to stay on the mark and the line and the fins must be 90 degree from the body tube, straight up. keep the leading edge forward.

make sure its dry before you repeat the same process with the other 3 fins.

(Tip: Keep checking the alignment often as you go by looking down the length of the tube.)

(See pictures for example)

If the fins are dry and sturdy move on to the 6 7/8" marks and repeat the same process with the small fins, with the rear root edge at the mark and on the line. Make sure the leading edges are facing forward, let glue dry before moving to the next part. Let everything dry. 1 Will line up with one of the rear fins.