Hello. I have been doing some reading and it appears the stock evolution 3 blade prop on my Alpha 40 (Evo .45 Trainer) and the glow plug should be changed.

What prop (11x6 2 blade?) and glow plug (A3?) do you guys suggest?

If I change the prop, do I need a new backplate and spinner?

Thanks!

Yes...

IMO if you're learning to land, the Master Airscrew props are more forgiving if they come in contact w/ the ground. A prop balancer would be a good addition to your tools as well.
An 11x5 or 6 will work well.

The H9 Super Plug that comes with the engine is a good plug...the O.S. A3 is good too.

You'll either need a 2 blade style spinner, or a safety nut instead of a spinner.

I use an 11x6 (I believe) Master Airscrew Windsor on mine and it rips up the sky for a trainer. I run mine bare prop with just the nut, no backplate or spinner. I have a two bladed starter spinner cup instead of the standard but you could just turn your existing cup around if you want to run bare prop.

You could use an A3 plug this time of year as they run a little hotter.I just left the factory EVO plug in it and I richen the high speedit 1-2 clicks for the colder weather.

I ran my Alpha 40 with a MS 11x5, then when I stopped having prop strikes changed to an APC 11x5, Obviously needed to change the spinner to a two blade one. Du bro spinner needed no cutting for the MS prop but had to be opened up a little for the APC.

The Evolution engines come with the Hangar 9 "super duty" plugs.

These are LONG plugs.

The O.S. A3 is a short plug.

Better to use a long plug as the manufacturer recommends.

In the image below on the left you see the long plug used in the Evolution engines, on the right the A3 plug. The other unmarked plug is that used on Supertigre engines.



An APC 11x6 2 blade is about the largest prop the engine will take. Beyond that you start loosing speed and/or thrust.