In collaboration with Vogelsang Aeroscale, a no-weld kit was developed for Moki radial engines. Designed to install from the exhaust bend receiver coupling. The simplest way to add smoke to early Moki radials before the M5 smoke tap ports were implemented.
Just drill a hole and bolt on your smoke nozzle.
Here we will show the steps involved as well as a few tools needed to install the Moki no-weld smoke nozzle adapter. No-weld adapters work with 10-32 threaded atomizing smoke nozzle kits sold separately. *This late model muffler already has the M5 smoke port and ready for the M5 smoke nozzle kit. We are going to install the no-weld version next to the M5 smoke port just to show the steps involved.
This process should be done with the muffler removed from the engine and then cleaned and dried before installing back on the motor. New consumables - Teflon seal rings and copper crush washers are suggested.
Mark the Tygon tubing with a marker and install on nozzle marking the spray direction. Thread hex nut on to nozzle followed by split lock washer and contoured spacer. Flat side of spacer against lock washer.
After carefully locating placement as not to interfere with intake runner pipe. Remove exhaust bend tube then drill and deburr hole for nut. String wire through both holes and install nut nose end first.
"Fish" nut into place up the wire until it protrudes from the hole you drilled.
Lightly hold the nut with pliers. Carefully remove wire and thread prepped nozzle & components onto nut 1 or 2 turns. Use your reference mark on Tygon tubing.
Carefully push the nut back into the muffler while turning the nozzle & nut no more than 1/2 turn while observing the protruding nose. When the nose is at maximum length you have the contoured nut matched to the internal surface of the muffler. Stop and apply light pressure pulling nut through hole again.
Match spacer curvature to match with outside muffler surface. With light pressure holding nut to muffler, thread nozzle into nut 4-5 turns. End with nozzle pointing past receiver inlet and around the muffler circumference.
Tighten the hex nut and remove the Tygon tubing. Nozzle is installed and muffler is ready to be installed back on engine. Be sure to use high temp smoke oil tubing. See plumbing diagrams for more info.
Smoke systems are accessory items and may void your engine warranty. Consult your engine manufacturer for specifics. BDS assumes no responsibilities for damages incurred due to improper installation or setup.