We added one enhancement for the lift fan. A little bit of rubber padding between the engine mount and the safety grill. I hope that this will avoid any rattling between the two. And it should also take out some of the vibrations.
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| Rubber padding installed |
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| Close up of the rubber padding during the installation process |
Our simple design is reusing some used RC car tires. They're cut and splayed open. And then zip tied to the engine mount.
One thing we noticed and were surprised about was the amount of rust that's accumulated on the engine mount. There's nothing structural, but it was more than we were expecting since the craft has always been in the garage.
One other thing that we had to do was to bang out the small indent where the lift fan cowling was slightly dented from its past life with wheels mounted there.
We also tested again with the sound meter. Even with the padding the lift fan is still at similar levels. Mid to high 90s db at idle and almost 105db throttled up.
Here's me trying out the new mount with the fan and exploring the envelope of CG which is now much larger.
We tested out the thrust fan too. Again the engine noise is basically all the noise and it ranges from the mid 90s up to just over 110db at full throttle. It also appears to be the majority of the noise coming from the engine. Of course the
