ORIGINAL: GaryHarris
I had to bring this back up guys. I'm confused. This is a cut and paste asking my local guys on my forum.
My GP Big Stik 40 will show up tomarrow. Tonight Ill start stripping the electronics out of the trainer and pull the Mangum 52 4 stroke out. Orginally I wanted to put that motor in the Big Stik and save the 52 2 stroke for the SSE. But I went and asked the guys on RCU and naturally they said no, it would be underpowered. All I got was confused.
The Magnum 52 rfs has enough power to pull the LT-40 weighing in at about 7 lbs dang near unlimited vert, but not enough power to pull a 5 1/2 lb Big Stik off the ground with allmost identical wing loading?
Magnum 52 2 stroke recommended prop for break in. 10x6 after that, possibly up to a 11x6.
My magnum 52 4 stroke. Im running a 12x5 prop with 10% nitro. If I upped the nitro to 15% with the 12x5 MAS K series, or possibly a 12x6 prop, I think it would pull the Stik just fine. May not be a speed demon, but thats not what I want just yet. Just a smaller plane that has a little more aerobatic ability over the 4*, and still fly slow when I want to. Torque over RPM so to speak. A Harley, not a Ninja.
What to do, what to do?
Gary, the best thing to do would be to go to the RJL website and order an Edson Universal Adjustable Engine Mount. Install that on the nose of your Big Stik 40 and then you will be able to try any engine that you want to try on your model. I have fun taking an afternoon and flying four or five different engines on the same model because of the Edson mount and its capabilities. Then you will know which engine is best for you.
Ed Cregger