Dave - a few guys in the Philly Flyers tried the first version of the Magnum 52 around 20 years ago.
It appeared to be a copy of the OS Surpass 52.
It ran well, very smooth but not quite up to the power of the OS. I tried and compared the two of them on the Polaris and the power difference was noticeable.
However, the Magnum had very little run time so it may not have been fully broken in.
I have a Magnum 30 4S and it makes very good power.
If yours is a 52A, there may been some performance improvements.
Best to put some run time on it and then try it on a plane.
Bob Z.
Topic: Magnum .52a (Read 374 times)