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Articulated Val Two Stage Articulated Bomb Drop and Trapeze
Retract |
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1) Concept
Videos 2) The Diels Kit - Construction 3) Rubber Motor Swing Peg 4) Stage One - Bomb Drop 5) Stage Two - Trapeze Retract |
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1) Concept for a Two Stage Articulated Bomb Drop and Trapeze Retract |
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YouTube Video of the first experiments with a Smoke Bomb. A
dress Pin is pushed through the front of the bomb and |
YouTube Video of the paper mock up of the 2 Stage Articulated Bomb Drop and Trapeze Retract. A
step-by-step description of the 2 stage process. |
YouTube Video of the actual mock up of the Trapeze Retract Mechanism. Fixed to a flat board, here is my first working retract mechanism. |
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Val Bomb Drop 1 |
Val Bomb Drop 2 | Val Bomb Drop 3 |
| YouTube Video of the complete Trapeze and Retract. The trapeze
is made from 1/16 aluminum tubing. Slit with a |
YouTube video of the Final Swing Peg
A string is used for the rubber motor to pull the |
YouTube video of the Final Retract
Mechanism An evolution of design for the Retract |
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Val Bomb Drop 4 |
Val Bomb Drop 5 | Val Bomb Drop 6 |
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YouTube video of the Final Retract Mechanism Installed the retract is installed on the fuse and
working great!
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Stage 1 Bomb Drop and Stage 2 Trapeze Retract |
Evolution of an Idea Start with video #1 through #7 - about 12 minutes
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Val Bomb Drop 7 |
Val Bomb Drop 8 | Articulated Val |
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| Dave's autograph |
Initial Layout of the fuse Wheel pants in upper right, Trapeze system in upper left. |
Swing-Peg is installed. |
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Wing center section on the board |
Fitting the center section | Center wing |
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| Wing panel on the board |
Showing off the lightening holes and T shape leading edge |
Wing plan |
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| wings attached |
paper fairings have compound curves |
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Magnet attached landing gear |
paint the base coat next ... |
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The motor Swing Peg. Uses an RC hinge pin. Requires a rubber band to pull it back. Lighter with better range of movement. |
Inside view showing string for the rubber band. Supported by 1/32 balsa / stooge hole supported by 1/64 ply. |
Rubber band attaches to the end of the Swing Peg. A string will attach here also and run forward to pull both Stage 1 and Stage 2 release pins. |
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The smoke bomb showing the dress pin plunger glued to a stiff paper disk. The funnel increases the air flow as the "smoke" exits. see video #1 |
Bomb drop pin before painting | |
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The first step in the design concept is the free swinging front arm (in brown paper) its free movement is clearly shown in the cut-out arc. |
Second an actual working model. With 1/32 ply, a spring from a toggle bolt and plastic nyrod as the release pin. This worked great. |
Finally - All you really need is the release pin and a spring. Now with a floppy disk spring. Slot the aluminum tube and insert the spring. |
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| Trapeze ends - glued into holes
in the fuse. Hammered thin aluminum drilled and inserted into slits in 1/16 dowel. |
1/16 aluminum ends are slit and then drilled | Trapeze rear swing arms forma V
shape. The bomb release is attached. |
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| Bomb Release is 1/64 aluminum
plate hammered to about 1/100 thin. Then very tiny holes drilled. Cut out with a dremmel and finished by hand |
Retract with the Pin in all the
way holding the aluminum release tube. Wire is the front swing arm of the trapeze. |
Side view with the pin all the
way in. Wire is dropped as the trapeze would drop. |
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| Side view with the Pin almost
completely pulled Out. Wire is laying back against the fuse. |
Bottom view - Pin is pulled out. | Side rear view. |
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| Trapeze is installed and working great! | Note brass tube support for the spring, allows movement | Tiny drill bit makes a tiny hole in a 1/16 aluminum tube |
Click on photo for larger image, then use your Back-Key to return |
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