Coil Engine Pop Pop Boat. A handmade boat originating from Spain. £35.00 Out of stock Coil Engine Pop Pop Boat. Handmade in Spain. We don't know a great deal about this boat. Made of tin (we think) and features a large coil pop pop engine. The fuel holder looks like it takes solid fuel and is secured to the hull under the boiler.The rudder (also handmade) could be adapted to take a servo for radio control. There's plenty of roomat the front of the boat to accomodate a servo and related electrics. A primitive, but rare example. 11" (27.5cm) long approx excluding the rudder. This is an unfired / untested boat, so we're not sure how well it runs.