Quad City Challenger II - Sundown Circuits

First flight after a long pause. Circuits on a beautiful summer evening. All goes well until the engine develops a shake and I need to land to see what's up. I suspect the propellor needs to be tightened.

[@DavidSmith-jc4yk]

Very nice. So envious..

[@me109av8r]

Thanks for watching! I’m glad you liked it, even if it was just flying circuits.

[@DavidSmith-jc4yk]

@@me109av8r That is the ultralight I would love to have. I live near Edenvale where the Canadian distributer is. i was out to talk to him but have not been able to afford it. Now I am retired and living a dream life but what you do is top on the list of if only i could. My daughter has my flying bug but now lives in Mexico where he pilots license is not valid. Anyway fly when you can and enjoy!

[@jssmallcal3165]

Will be interested to know what you find. My Challenger II (503) prop is safety wired. Is your prope belt driven? Proper tension? Please let us know.
It's a beautiful example of the breed. Congratulations and many more happy hours.

[@me109av8r]

Thanks. Sorry for the late reply. I believe the issue was the belt redrive tension. I adjusted and the problem seems to be gone.

[@mikegraham5020]

So what did the high RPM roughness end up being? Nothing too sinister I hope.

[@me109av8r]

I discovered the nut on the prop shaft needed a little tightening. There was a little play, which would cause a wobble and vibration. It’s been too windy here to do a test flight, but I am confident that was the cause. Thanks for asking. Cheers!

[@VikingVanMan]

What was wrong with the engine ??? Skål 🍺 🍺🍺

[@me109av8r]

You may have seen my recent videos. I believe it was the belt redrive tension. I adjusted and the problem seems to be gone. I'll keep an eye on it. Thanks for asking!