Hi Dominik,
I'm assuming that you are looking for 'pipe lengths' as well as break-in recommendations. I will have to do some research to give you an ideal pipe length for that prop which is probably the smallest 'load' (diameter x pitch) that you would want to run on the Hanno. That is the prop size I use for break-in. To properly break-in an ABC type engine you need to get the engine running at 'normal' operating temperature which means avoiding excessively rich running. Start the engine and set the needle for a slightly rich maximum rpm setting. I run the engine about 15 minutes on the ground. First for 30 seconds, then 1 minute, etc. increasing by 30 seconds until you're running for 3 minutes. Allow the engine to cool between runs. I then fly a few (2-5) 'break-in' flights which consist of mostly full throttle horizontal flying. Periodically during these flights I will pull to vertical and any sagging (rpm falls off) results in the throttle being reduced and level flight restored. When the engine will pull vertically without sagging you can fly any maneuvers you wish. I like to run 15% nitro and keep the engine on the rich side.
Since you will be running the engine in an Aurora, I believe (it has been a while since I've flown an Aurora) that you are restricted in available pipe length. The original Aurora was flown with a short stroke YS and an 11x9 prop. I'm running an APC 13x9 prop with a pipe length of 17.5" from glo-plug to the baffle of an Hatori 650 pipe for my current Hanno set-up. What is the maximum pipe length (plug to baffle) that you can have and still put the Aurora belly pan on? I know many others ran the Hanno in the MK Aurora; so it can be done!
I hope this helps,
-Will


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