Here are a few pictures of the latest addition. A droppable water working "Torpedo" Still doing some refinements since the last one exploded and caught fire and melted in the water.

This is my second one of these. The first one exploded and caught fire last weekend when the Lipo got wet the second time I took the plane out to test it. the first time was a complete success and worked perfectly. Too Perfectly in fact and took off across the lake ....forcing me to take a swim after it.

It consist of three of the grey FMS Zero Drop tanks glued together and hollowed out in select sections that house a small 1S 150mAh lipo powering a small electric motor, dowsed in corrosion X. The (+,-) end of the circuit are left slightly exposed at the nose tip of the TORPEDO to cause a circuit short, and closes the circuit to engage the motor when it makes contact with water after it's dropped.

I'm also doing this same thing for my Free Wing SBD5 on the center line drop

In short...I tried to make it as simple and easy as possible. it's really not hard or sophisticated. Simple small motor, wire, battery (many to choose from)...I used a leftover 1S lipo...but I may change it to AAA or AA instead? later.... Less volatile ...lol