No fanfare. I work slowly and am not good at machining and taking picture as I go, we wasted the summer upstate NY, no progress.
Fuel
www.s-whobby.com Airplane 10% nitro
The engine looses a few RPM when the plugs are cut. An indication that it could use a hotter plug or more nitro
Oil splube.com synthetic
Plug OS-F
The glow driver is a rewound transformer 5 secondaries. 5 Shunts 0.033 ohm common on the GND side. A simple bit of electronic to detect >66mV across the shunt.
A little contraption to change the primary voltage. You can see the Pot and the 5 LED indicating the plug have current.
It work like a charm, I designed Power Supply for a lifetime so is the minimum one expects.
I like to feed the plug only at start up, like you would on a plane. But have the option to keep it on and even under-power the plugs.
The pinion gear has a dot mark that must be Vertical when cylinder 1 is TDC.
The cam was drilled in the flat space between the cams and in the space where the bumps just overlap.
A #2 set screw tapped in the hole to hold the ring gear. With the set screw loose, the cam is rotated (the ring gear stays put, locked by the pinion and piston kept at TDC) The cam is adjusted to be exactly on the switchover point for cylinder 1, this is a visual since the front cone is not there. At that point the set screw is tightened locking the relation between ring-gear and lobes. The cam removed and six holes drilled for the screws holding the ring-gear to the cam. Even if the ring-gear is rotated 60 degrees it makes no difference on the 48 tooth gear.
Jos I concluded that bending the intake pipe through a compound angle and have the flanges land in the exact pace and the exact orientation for the holes to match was impossible for any one let alone a klutz like me. I have figured you were good but bending those pipes is supreme.
The video on youtube is at
