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Jims RV-8
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Date:  7-10-2020
Number of Hours:  3.00
Manual Reference:  
Brief Description:  Engine run day

Exciting day as I got to watch the engine come to life. The first run was cut very short as the fuel injection fitting on #1 was leaking. They quickly replaced the faulty tube and we were back to running in no time. Connie said she would do the pretty bend job on the tube after the run in as she didn't want to take time to do the bends right now. You can see the moon shaped tubing on #1 below.

The first run is an orchestrated dance between putting enough of a load on the engine to start the break-in/run-in process but keeping the load just less than what will overheat the cylinder heads. Sam was constantly adjusting the water on the dyno to increase the load while adjusting the airflow to keep things cool enough. Sam also must watch all the engine parameters and make sure things like oil pressure and temperature stay in the green.

After first (second) start the engine was run at idle until the engine oil temp came up to operating temp. Then the engine is run in graduated steps of RPM up to a cruise type setting of 24" manifold pressure and 2400 RPM. This cruise phase is a 30 minute run - then we did the full power run. The engine remained very smooth throughout. After the power run, Sam brought the power back slowly and began the cool down phase. All-in-all we got a little over 1.5 hours of engine time in today. After the shut down, Sam added the preservative to the oil (since I won't be flying for a while) and ran the engine just above idle to coat the interior parts. The he removed the cooling shroud and baffles and took a compression test on all 4 cylinders.
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pre-oil done, baffling installed - ready to start

pre-oil done, baffling installed - ready to start

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Sam watching and making adjustments

Sam watching and making adjustments

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Post run, new tubing on cylinder #1 (bottom right)

Post run, new tubing on cylinder #1 (bottom right)

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