THE POW­ER­TRAIN

Popular Mechanics (South Africa) - - News -

A/ MO­TOR

The 27 KV drone mo­tor is hooked to an RC trans­mit­ter like the kind you’d use to fly drones. I con­trol it by re­mote from the deck of the boat.

B/ UNI­VER­SAL JOINT

It’s a lit­tle overkill but this came from a trac­tor. This al­lows me to go a cou­ple de­grees off axis with­out mess­ing up the sys­tem.

C/ THRUST BEAR­ING AND SUP­PORT BLOCK

The block is made of thin lam­i­na­tions of ply­wood held to­gether by epoxy. It’s as strong as alu­minium.

D/ TRANS­MIS­SION COU­PLER

I kept this from the orig­i­nal setup. If it could iso­late the vi­bra­tion of the old en­gine, the new mo­tor is no prob­lem.

E/ STUFF­ING BOX

It’s orig­i­nal to the boat, but leaked and was cov­ered in rust. Once I got it open, I tight­ened the rope around the prop to keep wa­ter out.

F/ PRO­PEL­LER

Orig­i­nal. It uses a sac­ri­fi­cial an­ode. As long as I keep that up, it should last a very long time. Even­tu­ally I’ll re­place it with one with steeper pitch.

G/ RUD­DER Came with the boat. Works great.

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