Category: Model Rocketry

Blue Dart Delta II Assembly

The Blue Dart Delta II is a fiberglass experimental RC rocket plane. It is based on the original Blue Dart Delta all foam rocket plane.

The body tube (BT-80) was glassed with 1-ply of BID cloth and covered with peel ply. Paper templates were made for the delta wings, winglets, vertical stabilizer and ventral fin and then layed out on 3/8″ foam.

The peel ply was removed from the body tube and the glass ends were trimmed and sanded flush with the ends of the tube. A fin tool was used to mark the locations on the body tube where the wings, ventral fin and vertical stabilizer are located.

The rail buttons were located, drilled, and installed.

The BT80 x 24mm Engine Mount was assembled and installed.

The first side of the wings, winglets, vertical stabilizer, and ventral fin were glassed with 1-ply BID cloth (at 45deg to airflow) and covered with peel ply.

Glassed the 2nd side of the rocket parts with 1 layer of BID cloth at 45 degrees and covered with peel ply.

Cutting out the fiberglass delta wings, winglets. vertical stabilizer and the ventral fin. A rocket plane is starting to take shape!

Cut out the elevons then added the horns for the servo rod connections and hinged the elevons in place.

Used 5-min epoxy to tack the winglets to the wings and the vertical stabilizer and the ventral fin to the body tube.

The delta wings attached to the body tube using 5-min epoxy.

Flox was applied on the top surface of the rocket plane where the wings meet the body tube and the winglets meet the wings. Additionally, flox was applied where the vertical stabilizer joins the body tube. The next day, after the flox cured, the rocket plane was turned over and flox applied to all joining surfaces on the bottom side.

Once the flox cured, the flox corners were sanded, dust vacuumed and primer was added to the rocket plane.

The nose cone and vertical stabilizer were painted white then the nose cone removed and the vertical stabilizer covered and blue paint applied to the remainder of the rocket plane.

Now that the rocket plane body is complete, the servo motor control for the elevons is installed, configured, and tested.

The Blue Dart Delta II Experimental Rocket Plane is ready for initial testing.

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Blue Dart Delta Assembly

Thanks for following the Blue Dart Delta Assembly progress. This rocket glider has a length of 37″ and a wingspan of 20″. It is launched from a vertical rail using an Aerotech E-6 24mm composite rocket engine. We will ignite the engine using a wireless launch controller and an electric spark igniter.

The Blue Dart Delta is controlled using a FlySky Remote Control Transmitter and a FS-R6B Receiver. The receiver connects to the servo motors to move the elevons. Elevons are the moving control surfaces at the trailing edge of a delta wing. Elevons combine the functions of the elevator (used for pitch control) and the aileron (used for roll control).

We have finished building the rocket glider and look forward to flying it this summer. Here are some photos from the build. Subscribe to keep up with the Blue Dart Delta Assembly updates.

Electric Spark Igniter Testing

One question that we keep getting asked is “can this electric spark igniter be used with composite propellant engines?”. With the addition of the BlueHeat Ignition wires the answer is YES.

This one launch ignition system can be used to ignite A-E and beyond.

We successfully and consistently ignite A-E black powder rocket engines using our electric spark igniter.

We ran a test yesterday to see if we could ignite a composite propellant engine with just the spark from the igniter. As suspected, that didn’t work because the spark doesn’t generate enough heat for this application.

Another test was to see if the electric spark igniter would ignite the ignition wires that come with the Aerotech composite engines which normally hook up to a 12V system. As expected, that didn’t work because those wires just conduct the electricity with no spark created and our system uses a lower voltage than a car battery.

Knowing we need to ignite a chemical mixture using a spark which then heats the composite engine we created the BlueHeat Ignition wires to connect to the spark gap igniter. On this test, as you can see in the video, the electric spark igniter can successfully ignite a composite engine when coupled with the BlueHeat Ignition wires.

For those wanting to launch composite engines using the electric spark igniter, the BlueHeat Ignition wires are easy to make. We don’t plan on selling them due to the complexities involved in international shipment of the ignition mixture, so if you want to make them yourself to use with our electric spark igniter then contact us at and we’ll be happy to share the secret recipe if you haven’t already figured it out from the photos above.