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Updated: Aug 16, 2023

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

Martian Probe Instructions
Download PDF • 885KB

CG 7 inches from AFT end.

Length 26"

BT-60 Body tube

24mm Motors Cs, Ds

Mylar chute

Laser cut balsa fins

plywood rings

Kevlar and elastic cords

Read all instructions before beginning.

Locate motor mount parts.

Motor tube, rings, braided cord and motor hook.

Make a mark 1/4" from the end of the motor tube and a mark from the other end at 1/2."

Using a hobby knife make a 1/8" slit at the 1/4" mark.

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.

Run the braided cord through the hook gap on the FWD ring and tie the end around the center of the motor tube. Tie it around the motor tube. Put a drop of glue on the kn

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 FWD end of the tube, the end with the slit and insert the small motor block ring until it stops on the motor hook. If your kit has more than 1 of these rings then glue them all in stacked together.

Set the motor assembly aside and let dry fully.

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

If you want to reinforce the hook. You can wrap a small pc of tape around the center or glue a strip of paper around it.

Add reinforcing glue to both sides of ring and wipe with finger. Put a drop of that glue from your finger on the knot on the braided cord.

When mount is dry. Feed cord down mount and out the AFT end.

Place a line of glue around the inside of the AFT end of the body tube, about 2" in.

Insert mount, stop about 1" in and very quickly add another line of glue around the inside of the body tube, just at the end.

Push mount without stopping until both tubes are even, note the hook placement durning this process. Add a line of glue to the AFT ring and tube joint, wipe off extra with finger. Let fully dry 24Hrs

Sand the fins. You can choose to round the edges or not to its your choice of looks. DO NOT round the top flat sections, this is where the rings will sit. They must remain flat.

Place tube on guide and mark 4 fin locations, then extend all 4 lines the length of the tube with door frame.

Put a mark on each line 5.25" from the AFT end.

Place glue on 1 large rear fin and glue it even with a line, let each one dry in place before moving to another. (TIP) I place each fin along the right side of each line.

It should look like the one in the picture.

Repeat the same process with the other 4 long FWD canard fins, Aline each one in front of each rear fin at the 5.25" mark

The short end of the fins face FWD and long end extends AFT towards the rear fins. (see picture)

Glue 1 launch lug against one of the rear fins flush with the end of the tube.

And the other lug in the mid-section of the FWD long fin. At 5" from FWD end.

Locate the card strips, lay them shinny side up. carefully cut them out. Make a mark on one end at 3/4 inch on the large strip and a mark on the small one at 5/8 inch, these will be the glue tab areas. Lightly sand these 2 areas just enough to remove the shiny. It will help the adhesion.

Dry fit the strips around the respective fins while holding the ring in shape with your fingers at the tab marks with no glue, careful not to crimp it. It should fit loose and slide on and off easy. Adjust or trim tabs if necessary.

NOTE: You can chose to make the glue tabs shorter if you prefer.

This part is tricky, try not to crimp the strips at any time.

Smear glue with your finger on to the small rings tab area and carefully glue the other end to the tab at the tab lines. Repeat on the large ring. Let dry.

Dry fit the card rings on each set of fins. Again, they should fit snug but slide on/off easy.

If rings do not fit, you can sand fins slightly, not too much.


Only put a very small amount of thin glue on the flat section of the fins. Smear it very thin with your finger. The Ring must sit on the rear fins flat. Too much glue will crinkle the paper.

Put the small ring on the FWD fins center it on the flat sections. And add lines of glue on each side of the fins on the inside if the ring.

Hold until it dries in place. Careful not to crimp it.

Repeat the same process with the large ring on the rear fins. Remember to put the seam of both rings on the same side. By the lug line is best. Let dry.

The fins will not stick to a painted surface, if you paint first, you should mask off the areas that require glue. Or sand the paint off before gluing fins on.

This kit was never really intended to have decals but i included some for you to use if you like.

they can be used as stencils also.

NOTE: If using the decals as stencils prime the surface first, because the decals could tear up the paper surface when removing it.

You can use masking tape to lift the decals off of their backing and place them on the rocket that way or peel the backing under and apply them. Be sure to apply them to a smooth surface.

Chose any finishing option that you wish and feel free to share your results here.

Please follow the NAR safety codes. Enjoy!

Toby C.

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