SNS3. Homebuilt version of the VW, Stromberg auto carb mounted above and behind the crankcase, Leburg ignition with variable timing that fires at 3 degrees AFTER TDC below 600rpm to almost guarantee that the engine will never ever stop in flight due to slow running and to ensure no kick-back during starts. Buzzers tell you when the ignition system is live or when they are on low battery. Generator is a 15 amp Honda motorbike alt mounted where the flywheel used to go. Dual ignition with separate batteries that are independent. Fuel on, choke out, pump on, throttle set, ignitions off, 8 blades, fuel off (so it can never fly off alone!), throttle set, ignitions on, pull past TDC, started! It starts even easier now that the engine is run in.
I've not got a parking brake so I tie a slipknot that can be released from the cockpit after it has been looped through the spokes of the wheels and behind the seat. If the plane rolls forwards then the rope gets taught as it coils round the wheels and stops them rolling any further. Lightest parking brake in the world (green rope in the first video). Cheaper than chocks and can be safely removed once the pilot is strapped in.
We had to use starter fluid on the Webster Whirlwind engine to get it to fire. Not sure why that was other than the fact that the whole engine was home-made from bits of VW, bits of DAF and a home-made crankcase and crankshaft. (handpropping for cowards vide above)